October 2008 LP8900 Ultra Noise, Dual 200mA Linear Regulator Anal
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LP8900 Ultra Noise, Dual 200mA Linear Regulator RF/Analog Circuits
October 2008
LP8900 Ultra Noise, Dual 200mA Linear Regulator Analog Circuits
LP8900 dual linear regulator capable supplying 200mA output current regulator. Designed meet requirements RF/Analog circuits, LP8900 provides device noise, High PSRR, quiescent current superior line transient response figures. Using innovative design techniques LP8900 offers class-leading device noise performance without noise bypass capacitor. LP8900 designed stable with space saving ceramic capacitors small 0402 case size, enabling solution size <4mm Performance specified -40°C 125°C junction temperature range. Output voltage options available between 1.2V 3.6V, availability please contact your local sales office.
Features
Operation from 1.8V 5.5V Input accuracy Over Temperature Output Voltage from 1.2V 3.6V 6µVRMSOutput Voltage Noise PSRR 75dB 1kHz 110mV Dropout 200mA load 48µA Quiescent Current regulator 80µs Start-Up time Stable with Ceramic Capacitors small 0402 Thermal-Overload Short-Circuit Protection
Package
micro (1.5mm 1.1mm)
Applications
Battery Operated Devices Hand-Held Information Appliances Noise Sensitive Applications DC/DC Convertor Post Regulation/Filter
Typical Application Circuit
30039302
2008 National Semiconductor Corporation
300393
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LP8900
Descriptions
Packages Symbol Name Function Disables Regulator when 0.4V. Enable Input internal pull-down resistor GND. Common Ground. Disables Regulator when 0.4V. Enable Input internal pull-down resistor GND. VOUT Voltage output. Ceramic Capacitor should connected from this GND. (See Application Information) Connect this output load circuit. Voltage Supply Input. 1.0µF capacitor should connected from this GND. Voltage output. Ceramic Capacitor should connected from this GND. (See Application Information) Connect this output load circuit. Enable Input; Enables Regulator when 1.2V. Enable Input; Enables Regulator when 1.2V.
VOUT
Connection Diagram
Bump Thin Micro SMD, Large Bump
30039306
package number TLA06
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LP8900
Ordering Information (6-Bump Micro SMD)
Only available Lead Free. Output Voltage Grade Vout 2.8V 2.8V *2.8V Vout2 2.8V 2.7V 1.2V Order Number Supplied Units, Tape Reel LP8900TLE_3333 LP8900TLE_AAEB LP8900TLE_AAEC Order Number Supplied 3000 Units, Tape Reel LP8900TLX_3333 LP8900TLX_AAEB LP8900TLX_AAEC
Contact your local Sales Office availability
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LP8900
Absolute Maximum Ratings
(Notes Military/Aerospace specified devices required, please contact National Semiconductor Sales Office/ Distributors availability specifications. VIN, VOUT Pins: Voltage -0.3 6.5V Voltage -0.3 (VIN 0.3V) 6.5V (max) Junction Temperature 150°C Lead/Pad Temp. (Note Micro 260°C Storage Temperature 150°C Continuous Power Dissipation Internally Limited (Note (Note Human Body Model Machine Model 200V
Operating Ratings
(Note 5.5V 200mA -40°C 125°C -40°C 85°C
Input Voltage Range Recommended Load Current channel Junction Temperature Ambient Temperature Range (Note
Thermal Properties
Junction Ambient Thermal Resistance(Note JEDEC Board (Note Layer Board
(Note
108°C/W 172°C/W
Electrical Characteristics
Unless otherwise noted, =1.2V, VOUT 0.5V, 1.8V, whichever higher where VOUT higher VOUT1 VOUT2. COUT 1µF, IOUT 1.0mA Typical values limits appearing normal type apply 25°C. Limits appearing boldface type apply over full junction temperature range operation, +125°C. (Note Symbol VOUT Parameter Input Voltage Output Voltage Tolerance Line Regulation Error Load Regulation Error Dropout Voltage(Note IOUT 200mA ILOAD Load Current Quiescent Current (Note VEN1 1.2V, VEN2 IOUT VEN1 1.2V, VEN2 1.2V IOUT VEN1 1.2V, VEN2 1.2V IOUT 200mA 0.4V PSRR Short Circuit Current Limit Power Supply Rejection Ratio (Note 3.6V (Note 1kHz, IOUT 200mA 10kHz, IOUT 200mA 100kHz, IOUT 200mA 1MHz, IOUT 200mA 10Hz IOUT 100kHz, IOUT 4.2V, COUT IOUT 200mA 1.0µF Temperature Hysteresis 0.003 µVRMS (Note VOUT(NOM) 0.5V 5.5V ILOAD VOUT(NOM) +0.5V 5.5V, IOUT IOUT 200mA VOUT 2.8V VOUT 3.6V VOUT 2.8V VOUT 1.8V 0.05 Conditions Limit -1.0 Units
Output noise Voltage (Note
TSHUTDOWN
Thermal Shutdown
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LP8900
Electrical Characteristics con't.
Unless otherwise noted, =1.2V, VOUT 0.5V, 1.8V, whichever higher, where VOUT higher VOUT1and VOUT2. CIN= COUT 1µF, IOUT 1mA. Typical values limits appearing normal type apply 25°C. Limits appearing boldface type apply over full junction temperature range operation, +125°C. (Note Symbol Parameter Conditions Limit Units
Enable Control Characteristics TOFF Maximum Input Current Input(Note Input Threshold High Input Threshold Turn Time Turn Time 5.5V 5.5V 1.8V 5.5V 1.8V 5.5V Level VOUT(nom) VOUT(NOM),IOUT= 0.003
Timing\Transient Characteristics(Note
Line Transient Response |VOUT| Trise Tfall 30µs 600mV Transient Response Load Transient Response |VOUT| Trise Tfall IOUT 200mA IOUT 200mA Overshoot Start-up
Note Absolute Maximum Ratings limits beyond which damage occur. Operating Ratings conditions under which operation device guaranteed. Operating Ratings imply guaranteed performance limits. guaranteed performance limits associated test conditions, Electrical Characteristics tables. Note Voltages with respect potential pin. Note further information these packages please refer following application notes,AN-1112 Micro Wafer Level Chip Scale Package. Note Internal thermal shutdown circuitry protects device from permanent damage. Note human body model 100pF discharged through 1.5k resistor into each pin. machine model 200pF capacitor discharged directly into each pin. Note maximum ambient temperature (TA(max)) dependant maximum operating junction temperature (TJ(max-op) 125°C), maximum power dissipation device application (PD(max)), junction ambient thermal resistance part package application (JA), given following equation: TA(max) TJ(max-op) PD(max)). Note Junction ambient thermal resistance dependant application board layout. applications where high maximum power dissipation possible, special care must paid thermal dissipation issues board design. Note Full details found JESD61-7 Note limits guaranteed. electrical characteristics having room-temperature limits tested during production 25°C correlated using Statistical Quality Control methods. Operation over temperature specification guaranteed correlating electrical characteristics process temperature variations applying statistical process control. Note minimum input voltage VOUT(NOM) 0.5V 1.8V, whichever greater. Note Dropout voltage voltage difference between input output which output voltage drops 100mV below nominal value. This parameter only specified output voltages above 1.8V. Note device maintains regulated output voltage without load. Note Short circuit current measured with VOUT pulled Note This electrical specification guaranteed design. Note Enable internal typical, resistor connected GND. Note capacitor tolerance should better over temperature. full operating conditions application should considered when selecting suitable capacitor ensure that minimum value capacitance always met. Recommended capacitor type X5R. (See capacitor section Applications Hints)
Recommended Capacitor Specifications
Symbol COUT Parameter Input Capacitor Output Capacitor Capacitance (Note Conditions Limit 0.33 0.33 Units
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LP8900
Typical Performance Characteristics.
Power Supply Rejection Ratio
Unless otherwise specified, COUT=1.0µF Ceramic, VOUT(NOM) 1.0V 1.8V whichever greater, 25°C, VOUT(NOM) 2.85V Enable tied VIN. Power Supply Rejection Ratio
30039310
30039309
Noise Density
Output Voltage Change Temperature
30039312
30039311
Ground Current Load Current
Ground Current Load Current
30039314
30039315
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LP8900
Typical Performance Characteristics con't.
Ground Current
Unless otherwise specified, COUT= 1.0µF Ceramic, VOUT(NOM) 1.0V 1.8V whichever greater, 25°C, VOUT(NOM) 2.85V Enable tied VIN. Vout Load Transient 200mA
30039318
30039321
Vout Load Transient 200mA
Load Transient. 1.8V, Vout 1.2V
30039319
30039320
Line Transient, 200mA Channel
Short Circuit Current
30039323
30039322
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LP8900
Typical Performance Characteristics con't.
Enable Start-up Characteristics
Unless otherwise specified, CIN= COUT 1.0µF Ceramic, VOUT(NOM) 1.0V 1.8V whichever greater, 25°C, VOUT(NOM) 2.85V Enable tied VIN. Enable Tied Together
30039325 30039342
Shutdown Characteristics
Dropout Voltage
30039326 30039328
Dropout Voltage Output Voltage
30039341
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LP8900
Application Information
EXTERNAL CAPACITORS common with most regulators, LP8900 requires external capacitors regulator stability. LP8900 specifically designed portable applications requiring minimum board space smallest components. These capacitors must correctly selected good performance. INPUT CAPACITOR input capacitor required stability. recommended that 1.0µF capacitor connected between LP8900 input ground (this capacitance value increased 10µF). This capacitor must located distance more than from input returned clean analogue ground. good quality ceramic, tantalum, film capacitor used input. Important: Tantalum capacitors suffer catastrophic failures surge current when connected lowimpedance source power (like battery very large capacitor). tantalum capacitor used input, must guaranteed manufacturer have surge current rating sufficient application. There requirements (Equivalent Series Resistance) input capacitor, tolerance, temperature, voltage coefficients must considered when selecting capacitor ensure capacitance will remain 1.0µF over entire operating temperature range. OUTPUT CAPACITOR Correct selection output capacitor critical ensure stable operation intended application. output capacitor must meet requirements specified recommended capacitor table over conditions application. These conditions include bias, frequency temperature. Unstable operation will result capacitance drops below minimum specified value. LP8900 designed specifically work with very small ceramic output capacitors. 1.0µF ceramic capacitor (dielectric type X5R) with between 500m, suitable LP8900 application circuit. Other ceramic types such less suitable owing their inferior temperature characteristics. (See section Capacitor Characteristics). also recommended that output capacitor placed within output returned clean, impedance, ground connection. possible tantalum film capacitors device output, VOUT, these attractive reasons size cost (see section Capacitor Characteristics). NO-LOAD STABILITY LP8900 will remain stable regulation with external load. This important consideration some circuits, example CMOS keep-alive applications. CAPACITOR CHARACTERISTICS LP8900 designed work with ceramic capacitors input outputs take advantage benefits they offer. capacitance values around 1.0µF, ceramic capacitors give circuit designer best design options terms cost minimal area. both input output capacitors, careful interpretation capacitor specification required ensure correct device
operation. capacitor value change greatly dependant conditions operation capacitor type. particular, ensure stability, output capacitor selection should take account capacitor parameters, ensure that specification within application. Capacitance value vary with bias conditions well temperature frequency operation. Capacitor values will also show some decrease over time aging. capacitor parameters also dependant particular case size with smaller sizes giving poorer performance figures general.
30039340
FIGURE Effect bias Capacitance Value. example Figure shows typical graph showing comparison capacitor case sizes Capacitance Bias plot. shown graph, result Bias condition, capacitance value drop below minimum capacitance value given recommended capacitor table. Note that graph shows capacitance spec 0402 case size capacitor higher bias voltages. therefore recommended that capacitor manufacturers' specifications nominal value capacitor consulted conditions some capacitor sizes (e.g. 0402) suitable actual application. Ceramic capacitors have lowest values, thus making them best eliminating high frequency noise. typical 4.7µF ceramic capacitor range 40m, which easily meets requirement stability LP8900. temperature performance ceramic capacitors varies type. Capacitor type specified with tolerance ±15% over temperature range -55°C +125°C. similar tolerance over reduced temperature range -55° +85°C. Some large value ceramic capacitors (4.7µF) manufactured with temperature characteristics, which result capacitance dropping more than temperature varies from 25°C 85°C. Therefore types recommended applications where temperature will change significantly above below Tantalum capacitors less desirable than ceramic output capacitors because they more expensive when comparing equivalent capacitance voltage ratings 4.7µF range. Another important consideration that tantalum capacitors have higher values than equivalent size ceramics. This means that while possible find tantalum capacitor with value within stable
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LP8900
range, would have larger capacitance (which means bigger more costly) than ceramic capacitor with same value. should also noted that typical tantalum will increase about temperature goes from 25°C down -40°C, some guard band must allowed. ENABLE CONTROL LP8900 switched logic input ENABLE pin.A high voltage this will turn device When enable low, regulator output device typically consumes 3nA. However application does require shutdown feature, tied keep regulator permanantly ensure fast start-up achieved, should driven separately. pulldown resister ties input ground, this ensures that device will remain when enable left open circuit. ensure proper operation, signal source used drive input must able swing above below specified turn-on/off voltage thresholds listed Electrical Characteristics section under VIH.
micro MOUNTING micro package requires specific mounting techniques which detailed National Semiconductor Application Note (AN-1112). Referring section Surface Mount Technology (SMT) Assenbly Considerations, should noted that style which must used with package NSMD (non-solder mask defined) type. best results during assembly, alignment ordinals used facilitate placement micro device. micro LIGHT SENSITIVITY Exposing micro device direct sunlight cause mis-operation device. Light sources such halogen lamps affect electrical performance brought near device. wavelengths which have most detrimental effect reds infra-reds, which means that fluorescent lighting, used inside most buildings will have little effect performance.
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LP8900
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LP8900
Physical Dimensions inches (millimeters) unless otherwise noted
Bump Thin micro SMD, Large Bump Package Number TLA06CZA Dimensions given 1.057mm 0.030mm 1.463mm 0.03mm 0.60mm 0.075mm
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LP8900
Notes
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LP8900 Ultra Noise, Dual 200mA Linear Regulator RF/Analog Circuits
Notes
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