LT®3013 high voltage, micropower dropout linear regulator. device capa
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LT3013 250mA, Dropout Micropower Linear Regulator with PWRGD DESCRIPTION
LT®3013 high voltage, micropower dropout linear regulator. device capable supplying 250mA output current with dropout voltage 400mV. Designed battery-powered high voltage systems, quiescent current (65A operating shutdown) makes LT3013 ideal choice. Quiescent current also well controlled dropout. Other features LT3013 include PWRGD flag indicate output regulation. delay between regulated output level flag indication programmable with single capacitor. LT3013 also ability operate with very small output capacitors. regulator stable with only 3.3F output while most older devices require between 100F stability. Small ceramic capacitors used without need series resistance (ESR) common with other regulators. Internal protection circuitry includes reversebattery protection, current limiting, thermal limiting reverse current protection. device available with adjustable output with 1.24V reference voltage. LT3013 regulator available thermally enhanced 16-lead TSSOP profile (0.75mm), 12-pin (4mm 3mm) package, both providing excellent thermal characteristics.
Lare registered trademarks Linear Technology Corporation. other trademarks property their respective owners.
Wide Input Voltage Range: Quiescent Current: Dropout Voltage: 400mV Output Current: 250mA Protection Diodes Needed Adjustable Output from 1.24V Quiescent Current Shutdown Stable with 3.3F Output Capacitor Stable with Aluminum, Tantalum Ceramic Capacitors Reverse-Battery Protection Reverse Current Flow from Output Input Thermal Limiting Thermally Enhanced 16-Lead TSSOP 12-Pin (4mm 3mm) Package
APPLICATIONS
Current High Voltage Regulators Regulator Battery-Powered Systems Telecom Applications Automotive Applications
TYPICAL APPLICATION
Supply with Shutdown
DROPOUT VOLTAGE (mV) 5.4V 1.6M LT3013 249k
3013 TA01
Dropout Voltage
OUTPUT CURRENT (mA)
3013 TA02
750k
VOUT 250mA 3.3F
SHDN PWRGD
VSHDN <0.3V >2.0V
OUTPUT
1000pF
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LT3013 ABSOLUTE MAXIMUM RATINGS
(Note
Voltage .±80V Voltage .±60V Differential Voltage .±80V Voltage SHDN Input Voltage .±80V Voltage .7V, -0.5V PWRGD Voltage .80V, -0.5V Output Short-Circuit Duration Indefinite
Storage Temperature Range TSSOP Package .-65°C 150°C Package.-65°C 125°C Operating Junction Temperature Range (Notes LT3013E .-40°C 125°C LT3013HFE.-40°C 140°C LT3013MP.-55°C 125°C Lead Temperature (FE16 Soldering, sec) 300°C
CONFIGURATION
VIEW VIEW PWRGD SHDN PWRGD PACKAGE 12-LEAD (4mm 3mm) PLASTIC TJMAX 125°C, 40°C/W, 16°C/W EXPOSED (PIN MUST SOLDERED SHDN
PACKAGE 16-LEAD PLASTIC TSSOP TJMAX 140°C, 40°C/W, 16°C/W EXPOSED (PIN MUST SOLDERED
ORDER INFORMATION
LEAD FREE FINISH LT3013EDE#PBF LT3013EFE#PBF LT3013HFE#PBF LT3013MPFE#PBF LEAD BASED FINISH LT3013EDE LT3013EFE LT3013HFE LT3013MPFE TAPE REEL LT3013EDE#TRPBF LT3013EFE#TRPBF LT3013HFE#TRPBF LT3013MPFE#TRPBF TAPE REEL LT3013EDE#TR LT3013EFE#TR LT3013HFE#TR LT3013MPFE#TR PART MARKING 3013 3013EFE 3013HFE 3013MPFE PART MARKING 3013 3013EFE 3013HFE 3013MPFE PACKAGE DESCRIPTION 12-Lead (4mm 3mm) Plastic 16-Lead Plastic TSSOP 16-Lead Plastic TSSOP 16-Lead Plastic TSSOP PACKAGE DESCRIPTION 12-Lead (4mm 3mm) Plastic 16-Lead Plastic TSSOP 16-Lead Plastic TSSOP 16-Lead Plastic TSSOP TEMPERATURE RANGE -40°C 125°C -40°C 125°C -40°C 140°C -55°C 125°C TEMPERATURE RANGE -40°C 125°C -40°C 125°C -40°C 140°C -55°C 125°C
Consult Marketing parts specified with wider operating temperature ranges. more information lead free part marking, http://www.linear.com/leadfree/ more information tape reel specifications,
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LT3013 ELECTRICAL CHARACTERISTICS
PARAMETER Minimum Input Voltage Voltage (Notes 2,3) Line Regulation Load Regulation (Note Dropout Voltage VOUT(NOMINAL) (Notes CONDITIONS ILOAD 250mA ILOAD 4.75V 80V, ILOAD 250mA 80V, ILOAD (Note 4.75V, ILOAD 250mA 4.75V, ILOAD 250mA ILOAD 10mA ILOAD 10mA ILOAD 50mA ILOAD 50mA ILOAD 250mA ILOAD 250mA Current 4.75V (Notes Output Voltage Noise Bias Current Shutdown Threshold SHDN Current (Note Quiescent Current Shutdown PWRGD Trip Point PWRGD Trip Point Hysteresis PWRGD Output Voltage Charging Current Voltage Differential Ripple Rejection Current Limit Reverse Output Current (Note VCT(PWRGD High) VCT(PWRGD Low) 7V(Avg), VRIPPLE 0.5VP-P, fRIPPLE 120Hz, ILOAD 250mA VOUT 4.75V, VOUT -0.1V (Note VOUT 1.24V, 1.24V (Note
(LT3013E, LT3013MP) denotes specifications which apply over full operating temperature range, otherwise specifications 25°C.
1.225 1.24 1.24
4.75 1.255 1.28
UNITS VRMS
ILOAD ILOAD 100mA ILOAD 250mA COUT 10F, ILOAD 250mA, 10Hz 100kHz (Note VOUT VOUT VSHDN VSHDN VSHDN Nominal Output Voltage, Output Rising Nominal Output Voltage IPWRGD
ELECTRICAL CHARACTERISTICS
PARAMETER Minimum Input Voltage Voltage (Notes 2,3) Line Regulation Load Regulation (Note CONDITIONS ILOAD 200mA
(LT3013H) denotes specifications which apply over -40°C 140°C operating temperature range, otherwise specifications 25°C.
1.24 1.24
4.75 1.255 1.28
UNITS
ILOAD 4.75V 80V, ILOAD 200mA 80V, ILOAD (Note 4.75V, ILOAD 200mA 4.75V, ILOAD 200mA
1.225
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LT3013 ELECTRICAL CHARACTERISTICS
PARAMETER Dropout Voltage VOUT(NOMINAL) (Notes CONDITIONS ILOAD 10mA ILOAD 10mA ILOAD 50mA ILOAD 50mA ILOAD 200mA ILOAD 200mA Current 4.75V (Notes Output Voltage Noise Bias Current Shutdown Threshold SHDN Current (Note Quiescent Current Shutdown PWRGD Trip Point PWRGD Trip Point Hysteresis PWRGD Output Voltage Charging Current Voltage Differential Ripple Rejection Current Limit Reverse Output Current (Note VCT(PWRGD High) VCT(PWRGD Low) 7V(Avg), VRIPPLE 0.5VP-P, fRIPPLE 120Hz, ILOAD 200mA VOUT 4.75V, VOUT -0.1V (Note VOUT 1.24V, 1.24V (Note
(LT3013H) denotes specifications which apply over -40°C 140°C operating temperature range, otherwise specifications 25°C.
UNITS VRMS
ILOAD ILOAD 100mA ILOAD 200mA COUT 10F, ILOAD 200mA, 10Hz 100kHz (Note VOUT VOUT VSHDN VSHDN VSHDN Nominal Output Voltage, Output Rising Nominal Output Voltage IPWRGD
Note Stresses beyond those listed under Absolute Maximum Ratings cause permanent damage device. Exposure Absolute Maximum Rating condition extended periods affect device reliability lifetime. Note LT3013 tested specified these conditions with connected pin. Note Operating conditions limited maximum junction temperature. regulated output voltage specification will apply possible combinations input voltage output current. When operating maximum input voltage, output current range must limited. When operating maximum output current, input voltage range must limited. Note satisfy requirements minimum input voltage, LT3013 tested specified these conditions with external resistor divider (249k bottom, 649k top) output voltage 4.5V. external resistor divider will load output. Note Dropout voltage minimum input output voltage differential needed maintain regulation specified output current. dropout, output voltage will equal (VIN VDROPOUT). Note current tested with 4.75V current source load. This means device tested while operating close dropout region. This worst-case current. current will decrease slightly higher input voltages.
Note bias current flows into pin. Note SHDN current flows SHDN pin. Note Reverse output current tested with grounded forced rated output voltage. This current flows into pin. Note LT3013E guaranteed meet performance specifications from 125°C operating junction temperature. Specifications over -40°C 125°C operating junction temperature range assured design, characterization correlation with statistical process controls. LT3013H tested LT3013H Electrical Characteristics table 140°C operating junction temperature. High junction temperatures degrade operating lifetimes. Operating lifetime derated junction temperatures greater than 125°C. LT3013MP 100% tested guaranteed over -55°C 125°C operating junction temperature range. Note This includes overtemperature protection that intended protect device during momentary overload conditions. Junction temperature will exceed 125°C (LT3013E, LT3013MP) 140°C (LT3013H) when overtemperature protection active. Continuous operation above specified maximum operating junction temperature impair device reliability.
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LT3013 TYPICAL PERFORMANCE CHARACTERISTICS
Typical Dropout Voltage
GUARANTEED DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) 25°C 125°C DROPOUT VOLTAGE (mV) OUTPUT CURRENT (mA)
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Guaranteed Dropout Voltage
TEST POINTS 125°C
Dropout Voltage
250mA 100mA
25°C
50mA 10mA
OUTPUT CURRENT (mA)
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TEMPERATURE (°C)
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Quiescent Current
QUIESCENT CURRENT VSHDN TEMPERATURE (°C)
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Voltage
1.260 1.255 VOLTAGE
VSHDN
1.250 1.245 1.240 1.235 1.230 1.225 1.220 TEMPERATURE (°C)
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LT3013 TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current
QUIESCENT CURRENT VSHDN INPUT VOLTAGE 25°C QUIESCENT CURRENT VSHDN
Quiescent Current
25°C VOUT 1.24V INPUT VOLTAGE VSHDN VSHDN CURRENT (mA)
Current
25°C *FOR VOUT 1.24V 49.6 25mA* 10mA*
1.24k 1mA*
INPUT VOLTAGE
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3013 G06b
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Current
CURRENT (mA) CURRENT (mA) 24.8, 50mA* INPUT VOLTAGE 12.4 100mA* 4.96 250mA* 25°C, *FOR VOUT 1.24V
Current ILOAD
4.75V 25°C LOAD CURRENT (mA)
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3013
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LT3013 TYPICAL PERFORMANCE CHARACTERISTICS
SHDN Threshold
SHDN THRESHOLD SHDN CURRENT TEMPERATURE (°C)
3013
SHDN Current
25°C CURRENT FLOWS SHDN
SHDN Current
VSHDN CURRENT FLOWS SHDN
OFF-TO-ON
SHDN VOLTAGE
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ON-TO-OFF
SHDN CURRENT
TEMPERATURE (°C)
3013
Bias Current
PWRGD TRIP POINT OUTPUT VOLTAGE)
PWRGD Trip Point
BIAS CURRENT (nA)
OUTPUT RISING
OUTPUT FALLING
TEMPERATURE (°C)
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TEMPERATURE (°C)
3013
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LT3013 TYPICAL PERFORMANCE CHARACTERISTICS
PWRGD Output Voltage
PWRGD OUTPUT VOLTAGE (mV) TEMPERATURE (°C)
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Charging Current
CHARGING CURRENT TEMPERATURE (°C)
3013
Comparator Thresholds
COMPARATOR THRESHOLDS (LOW) TEMPERATURE (°C)
3013
IPWRGD
PWRGD TRIPPED HIGH
(HIGH)
Current Limit
1000 CURRENT LIMIT (mA) INPUT VOLTAGE 125°C 25°C CURRENT LIMIT (mA) VOUT
Current Limit
VOUT TEMPERATURE (°C)
3013
3013
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LT3013 TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Output Current
REVERSE OUTPUT CURRENT REVERSE OUTPUT CURRENT 25°C VOUT VADJ OUTPUT VOLTAGE TEMPERATURE (°C)
3013
Reverse Output Current
RIPPLE REJECTION (dB) VOUT VADJ 1.24V
Input Ripple Rejection
CURRENT FLOWS INTO OUTPUT
CLAMP (SEE APPLICATIONS INFORMATION)
4.75V 0.5VP-P RIPPLE 120Hz 250mA VOUT 1.24V TEMPERATURE (°C)
3013
3013
Input Ripple Rejection
4.75V 50mVRMS RIPPLE ILOAD 250mA MINIMUM INPUT VOLTAGE RIPPLE REJECTION (dB) FREQUENCY (Hz) 100k
3013
Minimum Input Voltage
TEMPERATURE (°C)
3013
ILOAD 250mA
COUT
COUT 3.3F
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LT3013 TYPICAL PERFORMANCE CHARACTERISTICS
Load Regulation
OUTPUT NOISE SPECTRAL DENSITY (V/Hz) LOAD REGULATION (mV) TEMPERATURE (°C)
3013
Output Noise Spectral Density
COUT 3.3F ILOAD 250mA
250mA
0.01 FREQUENCY (Hz) 100k
10Hz 100kHz Output Noise
OUTPUT VOLTAGE DEVIATION
Transient Response
0.15 0.10 0.05 -0.05 -0.10 -0.15 TIME
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VOUT 100V/DIV
COUT 250mA VOUT 1.24V
1ms/DIV
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LOAD CURRENT (mA)
VOUT 3.3F CERAMIC COUT 3.3F CERAMIC ILOAD 100mA 200mA
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LT3013 FUNCTIONS
(DFN Package)/(TSSOP Package)
(Pins 12)/(Pins 15): Connect. These pins have internal connection; connecting pins copper area heat dissipation provides small improvement thermal performance. (Pins 3)/(Pins Output. output supplies power load. minimum output capacitor 3.3F required prevent oscillations. Larger output capacitors will required applications with large transient loads limit peak voltage transients. Applications Information section more information output capacitance reverse output characteristics. (Pin 4)/(Pin Adjust. This input error amplifier. This internally clamped ±7V. bias current 30nA which flows into (see curve Bias Current Temperature Typical Performance Characteristics). voltage 1.24V referenced ground, output voltage range 1.24V 60V. (Pins 13)/(Pins 17): Ground. exposed backside package electrical connection GND. such, ensure optimum device operation thermal performance, exposed must connected directly 5/Pin board. PWRGD (Pin 6)/(Pin Power Good. PWRGD flag open collector flag indicate that output voltage come above nominal output voltage. There internal pull-up this pin; pull-up resistor must used. PWRGD will change state from open-collector high impedance after both output above nominal voltage capacitor charged through 1.6V differential. maximum pull-down current PWRGD state 50A.
SHDN (Pin 8)/(Pin 11): Shutdown. SHDN used LT3013 into power shutdown state. output will when SHDN pulled low. SHDN driven either logic open-collector logic with pull-up resistor. pull-up resistor only required supply pull-up current open-collector gate, normally several microamperes. unused, SHDN must tied logic high VIN. (Pin 7)/(Pin 10): Timing Capacitor. allows small capacitor delay timing between point where output crosses PWRGD threshold PWRGD flag changes high impedance state. Current this during charging phase voltage difference between PWRGD PWRGD high states 1.6V (see Applications Information Section). (Pins 11)/(Pins 13,14): Input. Power supplied device through pin. bypass capacitor required this device more than inches away from main input filter capacitor. general, output impedance battery rises with frequency, advisable include bypass capacitor battery-powered circuits. bypass capacitor range sufficient. LT3013 designed withstand reverse voltages with respect ground pin. case reversed input, which happen battery plugged backwards, LT3013 will there diode series with input. There will reverse current flow into LT3013 reverse voltage will appear load. device will protect both itself load.
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LT3013 APPLICATIONS INFORMATION
LT3013 250mA high voltage dropout regulator with micropower quiescent current shutdown. device capable supplying 250mA dropout voltage 400mV. operating quiescent current (65A) drops shutdown. addition quiescent current, LT3013 incorporates several protection features which make ideal battery-powered systems. device protected against both reverse input reverse output voltages. battery backup applications where output held backup battery when input pulled ground, LT3013 acts like diode series with output prevents reverse current flow. Adjustable Operation LT3013 output voltage range 1.24V 60V. output voltage ratio external resistors shown Figure device servos output maintain voltage adjust 1.24V referenced ground. current then equal 1.24V/R1 current current plus bias current. bias current, 30nA 25°C, flows through into pin. output voltage calculated using formula Figure value should less than 250k minimize errors output voltage caused bias current. Note that shutdown output turned divider current will zero. adjustable device tested specified with tied load (unless otherwise specified) output voltage 1.24V. Specifications output voltages greater than 1.24V will proportional ratio desired output voltage 1.24V; (VOUT/1.24V). example, load regulation output current change 250mA -7mV typical VOUT 1.24V. VOUT 12V, load regulation (12V/1.24V) (-7mV) -68mV Output Capacitance Transient Response LT3013 designed stable with wide range output capacitors. output capacitor affects stability, most notably with small capacitors. minimum output capacitor 3.3F with less recommended prevent oscillations. LT3013 micropower device output transient response will function output capacitance. Larger values output capacitance decrease peak deviations provide improved transient response larger load current changes. Bypass capacitors, used decouple individual components powered LT3013, will increase effective output capacitor value.
VOUT 1.24V (IADJ)(R2) VADJ 1.24V IADJ 30nA 25°C OUTPUT RANGE 1.24V
LT3013
VOUT
3013
Figure Adjustable Operation
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LT3013 APPLICATIONS INFORMATION
Extra consideration must given ceramic capacitors. Ceramic capacitors manufactured with variety dielectrics, each with different behavior across temperature applied voltage. most common dielectrics used specified with temperature characteristic codes Z5U, Y5V, X7R. dielectrics good providing high capacitances small package, they tend have strong voltage temperature coefficients shown Figures When used with regulator, capacitor exhibit effective value bias voltage applied over operating temperature range. dielectrics result more stable characteristics more suitable output capacitor. type better stability across temperature, while less expensive available higher values. Care still must exercised when using capacitors; codes only specify operating temperature range maximum capacitance change over temperature. Capacitance change bias with capacitors better than capacitors, still significant enough drop capacitor values below appropriate levels. Capacitor bias characteristics tend improve component case size increases, expected capacitance operating voltage should verified. Voltage temperature coefficients only sources problems. Some ceramic capacitors have piezoelectric response. piezoelectric device generates voltage across terminals mechanical stress, similar piezoelectric accelerometer microphone works. ceramic capacitor stress induced vibrations system thermal transients. PWRGD Flag Timing Capacitor Delay PWRGD flag used indicate that voltage within regulated voltage. PWRGD open-collector output, capable sinking current when voltage low. There internal pull-up PWRGD pin; external pull-up resistor must used. When rises within final reference value, delay timer started. this delay, programmed value capacitor pin, PWRGD switches high impedance pulled logic level external pull-up resistor. calculate capacitor value pin, following formula: tDELAY TIME (HIGH) (LOW)
CHANGE VALUE
BOTH CAPACITORS 16V, 1210 CASE SIZE, CHANGE VALUE
-100
BIAS VOLTAGE
-100
BOTH CAPACITORS 16V, 1210 CASE SIZE, TEMPERATURE (°C)
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Figure Ceramic Capacitor Bias Characteristics
Figure Ceramic Capacitor Temperature Characteristics
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LT3013 APPLICATIONS INFORMATION
Figure shows block diagram PWRGD circuit. startup, timing capacitor discharged PWRGD will held low. output voltage increases crosses threshold, flip-flop reset, current source begins charge timing capacitor. Once voltage reaches VCT(HIGH) threshold (approximately 1.7V 25°C), capacitor voltage clamped PWRGD high impedance state. During normal operation, internal glitch filter will ignore short transients (<15s). Longer transients below threshold will reset flip-flop. This flip-flop ensures that capacitor quickly discharged VCT(LOW) threshold before re-starting time delay. This provides consistent time delay after within regulated voltage before PWRGD switches high impedance. Thermal Considerations power handling capability device will limited maximum rated junction temperature (125°C LT3013E, LT3013MP 140°C LT3013HFE). power dissipated device will made components: Output current multiplied input/output voltage differential: IOUT (VIN VOUT) and, current multiplied input voltage: IGND VIN. current found examining Current curves Typical Performance Characteristics. Power dissipation will equal components listed above. LT3013 internal thermal limiting designed protect device during overload conditions. continuous normal conditions maximum junction temperature rating 125°C (E-grade, MP-grade) 140°C (H-grade)must exceeded. important give careful consideration sources thermal resistance from junction ambient. Additional heat sources mounted nearby must also considered.
PWRGD
VCT(HIGH) (~1.1V)
VREF
Figure PWRGD Circuit Block Diagram
VCT(LOW) ~0.1V
3013
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LT3013 APPLICATIONS INFORMATION
surface mount devices, heat sinking accomplished using heat spreading capabilities board copper traces. Copper board stiffeners plated through-holes also used spread heat generated power devices. following tables list thermal resistance several different board sizes copper areas. measurements were taken still 3/32" FR-4 board with ounce copper.
Table TSSOP Measured Thermal Resistance
COPPER AREA TOPSIDE 2500 1000 BOARD AREA 2500 2500 2500 2500 THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 40°C/W 45°C/W 50°C/W 62°C/W
Calculating Junction Temperature Example Given output voltage input voltage range 12V, output current range 250mA, maximum ambient temperature 30°C, what will maximum junction temperature power dissipated device will equal IOUT(MAX) (VIN(MAX) VOUT) (IGND VIN(MAX)) where: IOUT(MAX) 250mA VIN(MAX) IGND (IOUT 250mA, 12V) 250mA (12V (8mA 12V) 1.85W thermal resistance will range 40°C/W 62°C/W depending copper area. junction temperature rise above ambient will approximately equal 1.85W 50°C/W 92.3°C maximum junction temperature will then equal maximum junction temperature rise above ambient plus maximum ambient temperature TJMAX 30°C 92.3°C 122.3°C Example Given output voltage input voltage that rises 5ms(max) every 100ms, load that steps 200mA 50ms every 250ms, what junction temperature rise above ambient? Using 500ms period (well under time constant board), power dissipation follows: P1(48V load) (48V (200A 48V) 0.23W P2(48V 50mA load) 200mA (48V (8mA 48V) 8.98W P3(72V load) (72V (200A 72V) 0.35W P4(72V 50mA load) 200mA (72V (8mA 72V) 13.98W
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Table Measured Thermal Resistance
COPPER AREA TOPSIDE 2500 1000 BOARD AREA 2500 2500 2500 2500 THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 40°C/W 45°C/W 50°C/W 62°C/W
thermal resistance junction-to-case (JC), measured exposed back die, 16°C/W. Continuous operation large input/output voltage differentials maximum load current practical thermal limitations. Transient operation high input/output differentials possible. approximate thermal time constant 2500sq 3/32" FR-4 board with maximum topside backside area ounce copper three seconds. This time constant will increase more thermal mass added (i.e., vias, larger board, other components). application with transient high power peaks, average power dissipation used junction temperature calculations pulse period significantly less than thermal time constant device board.
LT3013 APPLICATIONS INFORMATION
Operation different power levels follows: operation PEFF 76%(0.23W) 19%(8.98W) 4%(0.35W) 1%(13.98W) 2.03W With thermal resistance range 40°C/W 62°C/W, this translates junction temperature rise above ambient 81°C 125°C. High Temperature Operation Care must taken when designing LT3013 applications operate high ambient temperatures. LT3013 works elevated temperatures erratic operation occur unforeseen variations external components. Some tantalum capacitors available high temperature operation, often several ohms; capacitor above unsuitable with LT3013. Ceramic capacitor manufacturers (Murata, AVX, TDK, Vishay Vitramon this writing) offer ceramic capacitors that rated 150°C using dielectric. Device instability will occur output capacitor value outside design limits elevated temperature operating voltage bias (see information capacitor characteristics under Output Capacitance Transient Response). Check each passive component absolute value voltage ratings over operating temperature range. Leakages capacitors from solder flux left after insufficient board cleaning adversely affects quiescent current operation. output voltage resistor divider should maximum bottom resistor value 124k compensate high temperature leakage, setting divider current 10A. Consider junction temperature increase power dissipation both junction nearby components ensure maximum specifications violated device external components. Protection Features LT3013 incorporates several protection features which make ideal battery-powered circuits. addition normal protection features associated with monolithic regulators, such current limiting thermal limiting, device protected against reverse-input voltages, reverse voltages from output input. Current limit protection thermal overload protection intended protect device against current overload conditions output device. normal operation, junction temperature should exceed 125°C (LT3013E, LT3013MP) 140°C (LT3013HFE). Like many power regulators, LT3013 safe operating area protection. safe area protection decreases current limit input voltage increases keeps power transistor inside safe operating region values input voltage. protection designed provide some output current values input voltage device breakdown. protection circuitry LT3013 uses current generated when input voltage exceeds decrease current limit. This current shows additional quiescent current input voltages above 25V. This increase quiescent current occurs both normal operation shutdown (see curve Quiescent Current Typical Performance Characteristics). input device will withstand reverse voltages 80V. negative voltage will appear output. device will protect both itself load. This provides protection against batteries which plugged backward. device pulled above below ground much without damaging device. input left open-circuit grounded, will like open-circuit when pulled below ground, like large resistor (typically 100k) series with diode when pulled above ground. input powered voltage source, pulling below reference voltage will cause device current limit. This will cause output unregulated high voltage. Pulling above reference voltage will turn output current.
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LT3013 APPLICATIONS INFORMATION
situations where connected resistor divider that would pull above clamp voltage output pulled high, input current must limited less than 5mA. example, resistor divider used provide regulated 1.5V output from 1.24V reference when output forced 60V. resistor resistor divider must chosen limit current into less than when difference between pins divided maximum current into yields minimum resistor value 10.6k. circuits where backup battery required, several different input/output conditions occur. output voltage held while input either pulled ground, pulled some intermediate voltage, left open-circuit. Current flow back into output will follow curve shown Figure rise reverse output current above occurs from breakdown clamp pin. With resistor divider regulator output, this current will reduced depending size resistor divider. When LT3013 forced below pulled above pin, input current will typically drop less than This happen input LT3013 connected discharged (low voltage) battery output held either backup battery second regulator circuit. state SHDN will have effect reverse output current when output pulled above input.
REVERSE OUTPUT CURRENT
25°C VOUT VADJ OUTPUT VOLTAGE CURRENT FLOWS INTO OUTPUT CLAMP (SEE ABOVE)
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Figure Reverse Output Current
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LT3013 TYPICAL APPLICATIONS
Buck Converter with Current Keep Alive Backup
D1N914 5.5V* 4.7F 100V CERAMIC BOOST LT1766 SHDN SYNC BIAS 15.4k 4.99k 0.33F
Buck Converter Efficiency Load Current
VOUT 1A/250mA VOUT
10MQ060N
EFFICIENCY
100F SOLID TANTALUM
OPERATING CURRENT HIGH 100k
LT3013 SHDN PWRGD
750k INPUT VOLTAGES BELOW 7.5V, SOME RESTRICTIONS APPLY INCREASE LOAD CURRENTS ABOVE 0.6A ABOVE
3013 TA03
0.25
0.75 1.00 0.50 LOAD CURRENT
1.25
3013 TA04
249k 1000pF
LT3013 Automotive Application
(LATER 42V)
PROTECTION DIODE NEEDED! LT3013 SHDN
750k 249k 3.3F LOAD: CLOCK, SECURITY SYSTEM
LT3013 Telecom Application
(72V TRANSIENT) LT3013 SHDN 750k PROTECTION DIODE NEEDED! 249k
3013 TA05
3.3F LOAD: SYSTEM MONITOR
BACKUP BATTERY
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LT3013 PACKAGE DESCRIPTION
Package 12-Lead Plastic (4mm 3mm) (Reference 05-08-1695)
4.00 ±0.10 SIDES) 0.65 ±0.05 0.20 3.00 ±0.10 SIDES) 1.70 0.10 SIDES) NOTCH
(UE12/DE12) 0603
0.115
0.38 0.10
3.50 ±0.05 1.70 ±0.05 2.20 ±0.05 SIDES)
MARK (NOTE PACKAGE OUTLINE
0.25 0.05 3.30 ±0.05 SIDES) 0.50
0.200
0.75 ±0.05
0.25 0.05 3.30 ±0.10 SIDES)
0.50
0.00 0.05
RECOMMENDED SOLDER PITCH DIMENSIONS NOTE: DRAWING PROPOSED VARIATION VERSION (WGED) JEDEC PACKAGE OUTLINE M0-229 DRAWING SCALE DIMENSIONS MILLIMETERS
BOTTOM VIEW-EXPOSED DIMENSIONS EXPOSED BOTTOM PACKAGE INCLUDE MOLD FLASH. MOLD FLASH, PRESENT, SHALL EXCEED 0.15mm SIDE EXPOSED SHALL SOLDER PLATED SHADED AREA ONLY REFERENCE LOCATION BOTTOM PACKAGE
Package 16-Lead Plastic TSSOP (4.4mm) (Reference 05-08-1663) Exposed Variation
4.90 5.10* (.193 .201) 3.58 (.141) 1514 1110
3.58 (.141)
6.60 ±0.10 4.50 ±0.10
NOTE
2.94 (.116) 0.45 ±0.05 1.05 ±0.10 0.65 2.94 6.40 (.116) (.252)
RECOMMENDED SOLDER LAYOUT
1.10 (.0433)
4.30 4.50* (.169 .177)
0.25
0.09 0.20 (.0035 .0079)
0.50 0.75 (.020 .030)
0.65 (.0256)
NOTE: CONTROLLING DIMENSION: MILLIMETERS MILLIMETERS DIMENSIONS (INCHES) DRAWING SCALE
0.195 0.30 (.0077 .0118)
0.05 0.15 (.002 .006)
FE16 (BB) TSSOP 0204
RECOMMENDED MINIMUM METAL SIZE EXPOSED ATTACHMENT *DIMENSIONS INCLUDE MOLD FLASH. MOLD FLASH SHALL EXCEED 0.150mm (.006") SIDE
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Information furnished Linear Technology Corporation believed accurate reliable. However, responsibility assumed use. Linear Technology Corporation makes representation that interconnection circuits described herein will infringe existing patent rights.
LT3013 TYPICAL APPLICATION
Constant Brightness Indicator over Wide Input Voltage Range
RETURN LT3013 SHDN -48V VARY FROM -80V -48V ILED 1.24V/RSET RSET
3013 TA06
3.3F
RELATED PARTS
PART NUMBER LT1020 LT1120/LT1120A DESCRIPTION COMMENTS 125mA, Micropower Regulator Comparator VIN: 4.5V 36V, VOUT(MIN) 2.5V, 0.4V, 40A, 40A, Comparator Reference, Class Outputs, S16, PDIP14 Packages 125mA, Micropower Regulator Comparator VIN: 4.5V 36V, VOUT(MIN) 2.5V, 0.4V, 40A, 10A, Comparator Reference, Logic Shutdown, Sources Sinks 2/4mA, Packages 150mA, Micropower, VIN: 4.2V 30/36V, VOUT(MIN) 3.75V, 0.42V, 30A, 16A, Reverse Battery Protection, SOT-223, Packages 700mA, Micropower, VIN: 4.2V 30V, VOUT(MIN) 3.75V, 0.4V, 50A, 16A, S0T-223, S8,TO220-5, TSSOP20 Packages VIN: 7.4V 60V, VOUT(MIN) 1.24V, 3.2mA, 2.5A, Package 60V, 440mA (IOUT), 100kHz, High Efficiency Step-Down DC/DC Converter 100mA, Noise Micropower, VIN: 1.8V 20V, VOUT(MIN) 1.22V, 0.3V, 20A, <1A, Noise 20VRMS, Stable with Ceramic Capacitors, ThinSOTPackage 150mA, Noise Micropower, VIN: 1.8V 20V, VOUT(MIN) 1.22V, 0.3V, 25A, <1A, Noise 20VRMS, Package 500mA, Noise Micropower, VIN: 1.8V 20V, VOUT(MIN) 1.22V, 0.3V, 30A, <1A, Noise 20VRMS, Package Noise, Fast Transient Response, VIN: 2.7V 20V, VOUT(MIN) 1.21V, 0.34V, 1mA, <1A, Noise 40VRMS, Version Stable with Ceramic Capacitors, TO220-5 Packages VIN: 5.5V 60V, VOUT(MIN) 1.2V, 2.5mA, 25A, TSSOP16/E Package 60V, 1.2A (IOUT), 200kHz, High Efficiency Step-Down DC/DC Converter VIN: 7.4V 40V, VOUT(MIN) 1.24V, 3.2mA, 30A, Packages 40V, 550mA (IOUT), 200kHz, High Efficiency Step-Down DC/DC Converter 300mA/60mA, (IOUT), Constant Off-Time, High Efficiency, VIN: 3.2V 34V, VOUT(MIN) 1.25V, 14A, <1A, Efficiency Step-Down DC/DC Converter ThinSOT Package 60V, 1.2A (IOUT), 500kHz, High Efficiency VIN: 5.5V 60V, VOUT(MIN) 1.2V, 2.5mA, 25A, TSSOP16/E Package Step-Down DC/DC Converter 300mA, Noise Micropower, VIN: 1.8V 20V, VOUT(MIN) 1.22V, 0.27V, 30A, <1A, Noise 20VRMS, Package 1.5A, Noise, Fast Transient Response, VIN: 2.1V 20V, VOUT(MIN) 1.21V, 0.34V, 1mA, <1A, Noise 40VRMS, Version Stable with Ceramic Capacitors, TO220-5, S0T-223, Packages 200mA, Noise Micropower, Negative VIN: -1.9V -20V, VOUT(MIN) -1.21V, 0.34V, 30A, Noise 30VRMS, Stable with Ceramic Capacitors, ThinSOT Package 50mA, 80V, Noise Micropower 250mA, 80V, Dropout Micropower Linear Regulator 20mA, 80V, Dropout Micropower Linear Regulator VIN: VOUT(MIN) 1.275V, 0.3V, 30A, Noise 100VRMS, MS8E Package, Grade +140°C TJMAX VIN: 80V, VOUT: 1.24V 60V, 0.4V, 40A, <1A, TSSOP-16E DFN-12 Packages, Grade +140°C TJMAX VIN: (100V 2ms, version), VOUT: 1.22V 60V, 0.35V, <1A, ThinSOT DFN-8 Packages
3013fe
LT1121/LT1121HV LT1129 LT1676 LT1761 LT1762 LT1763 LT1764/LT1764A
LT1766 LT1776 LT1934/LT1934-1 LT1956 LT1962 LT1963/LT1963A
LT1964 LT3010/LT3010H LT3012/LT3012H LT3014/HV
ThinSOT trademark Linear Technology Corporation.
Linear Technology Corporation
(408) 432-1900 FAX: (408) 434-0507
0209 PRINTED
1630 McCarthy Blvd., Milpitas, 95035-7417
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2005
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