LP5996 Dual Linear Regulator with 300mA 150mA Outputs LP5996 dual
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LP5996 Dual Linear Regulator with 300mA 150mA Outputs
LP5996 Dual Linear Regulator with 300mA 150mA Outputs
LP5996 dual dropout regulator. first regulator source 150mA, while second capable sourcing 300mA. LP5996 provides 1.5% accuracy requiring ultra quiescent current 35µA. Separate enable pins allow each output LP5996 shut down, drawing virtually zero current. LP5996 designed stable with small footprint ceramic capacitors down 1µF. LP5996 available fixed output voltages comes pin, 3mm, package.
Specifications
Input Voltage Range Dropout Voltage Ultra-Low (enabled) Virtually Zero (disabled) 2.0V 6.0V 210mV 300mA 35µA 10nA
Package
available Lead Free option.
other package options contact your sales office.
Features
Outputs with Independent Enable 1.5% Accuracy Room Temperature, over Temperature Thermal Shutdown Protection Stable with Ceramic Capacitors
Applications
Cellular Handsets PDA's Wireless Network Adaptors
Typical Application Circuit
20171501
2006 National Semiconductor Corporation
DS201715
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LP5996
Functional Block Diagram
20171506
Descriptions
LLP-10 Package Symbol CBYP Name Function Voltage Supply Input. Connect capacitor between this GND. Enable Input Regulator Active high input. High OFF. Enable Input Regulator Active high input. High OFF. Internal Voltage Reference Bypass. Connect 10nF capacitor from this reduce noise improve line transient PSRR. This left open. Connection. connect other pin. Common Ground pin. Connect externally exposed pad. Connection. connect other pin. Connection. connect other pin. Output Regulator 300mA maximum current output. Connect capacitor between this GND. Output Regulator 150mA maximum current output. Connect capacitor between this GND. Common Ground. Connect
VOUT2 VOUT1
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LP5996
Connection Diagram
LLP-10 Package
20171503
package number SDA10A
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LP5996
Ordering Information (LLP-10)
other voltage options, please contact your local sales office. Output Voltage Order Number LP5996SD-0833 LP5996SDX-0833 LP5996SD-0833 LP5996SDX-0833 LP5996SD-1525 LP5996SDX-1525 LP5996SD-1525 LP5996SDX-1525 LP5996SD-2828 LP5996SDX-2828 LP5996SD-2828 LP5996SDX-2828 LP5996SD-3030 LP5996SDX-3030 LP5996SD-3030 LP5996SDX-3030 LP5996SD-3033 LP5996SDX3033 LP5996SD-3033 LP5996SDX3033 LP5996SD-3308 LP5996SDX-3308 LP5996SD-3308 LP5996SDX-3308 LP5996SD-3333 LP5996SDX-3333 LP5996SD-333 LP5996SDX-3333 NOPB NOPB L182B NOPB NOPB L205B NOPB NOPB L179B NOPB NOPB L181B NOPB NOPB L180B NOPB NOPB L177B Spec NOPB NOPB Package Marking L176B Supplied 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Reel 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Re 1000 Units, Tape-and-Reel 4500 Units, Tape-and-Re
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LP5996
Absolute Maximum Ratings
(Notes Military/Aerospace specified devices required, please contact National Semiconductor Sales Office/ Distributors availability specifications. Input Voltage VOUT1, VOUT2, EN1, Voltage Junction Temperature (TJ-MAX) Lead/Pad Temp. (Note Storage Temperature Continuous Power Dissipation Internally Limited(Note -0.3V 6.5V -0.3V (VIN 0.3V) with 6.5V (max) 150°C 235°C -65°C 150°C
Rating(Note Human Body Model Machine Model 2.0kV 200V
Operating Ratings(Notes
Input Voltage EN1, Voltage Junction Temperature Ambient Temperature TARange (Note 2.0V 6.0V (VIN 0.3V) 6.0V (max) -40°C 125°C -40°C 85°C
Thermal Properties(Note
Junction Ambient Thermal Resistance(Note JALLP-10 Package 55°C/W
Electrical Characteristics(Notes
Unless otherwise noted, 950mV, VOUT 1.0V, 2.0V, whichever higher, where VOUT higher VOUT1 VOUT2. IOUT COUT1 COUT2 1.0µF. Typical values limits appearing normal type apply 25°C. Limits appearing boldface type apply over full junction temperature range operation, +125°C. Symbol VOUT Parameter Input Voltage Output Voltage Tolerance (Note IOUT 1.5V VOUT 3.3V VOUT 1.5V Line Regulation Error Load Regulation Error (VOUT(NOM) 1.0V) 6.0V IOUT 150mA (LDO IOUT 300mA (LDO Dropout Voltage (Note IOUT 150mA (LDO IOUT 300mA (LDO Quiescent Current IOUT1= IOUT2 IOUT1 150mA OFF, IOUT2 300mA IOUT1 150mA, IOUT2 300m VEN1 VEN2 0.4V IOUT Short Circuit Current Limit Maximum Output Current 0.03 Conditions Limit -2.5 -3.75 -2.75 +2.5 +3.75 +2.75 µV/mA Units
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LP5996
Electrical Characteristics(Notes
(Continued) Unless otherwise noted, 950mV, VOUT 1.0V, 2.0V, whichever higher, where VOUT higher VOUT1 VOUT2. IOUT COUT1 COUT2 1.0µF. Typical values limits appearing normal type apply 25°C. Limits appearing boldface type apply over full junction temperature range operation, +125°C. Symbol Parameter Power Supply Rejection Ratio (Note Conditions 1kHz, IOUT 150mA CBYP 10nF LDO1 LDO2 µVRMS 0.005 0.95 Level CBYP 10nF Limit Units
PSRR
20kHz, IOUT LDO1 150mA LDO2 CBYP 10nF Output noise Voltage (Note 10Hz 100kHz CBYP 10nF Temperature Hysteresis Enable Control Characteristics Transient Response Input Current VEN1 VEN2 Input Threshold High Input Threshold Turn Time (Note 0.0V VOUT 0.8V VOUT 3.3V
TSHUTDOWN Thermal Shutdown
Timing Characteristics
Line Transient Response |VOUT| Trise Tfall 10µs (Note 1VCBYP 10nF Load Transient Response |VOUT| (Note Trise Tfall IOUT 150mA IOUT 300mA
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 detailed soldering specifications information, please refer National Semiconductor Application Note AN-1187, Leadless Leadframe 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 limits guaranteed design, test statistical analysis. Typical numbers guaranteed, represent most likely norm. Note VIN(MIN) VOUT(NOM) 0.5V, 2.0V, whichever higher. Note Dropout voltage voltage difference between input output which output voltage drops 100mV below nominal value. This parameter only output voltages above 2.0V Note This electrical specification guaranteed design.
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LP5996
Output Capacitor, Recommended Specifications
Symbol COUT Parameter Output Capacitance Capacitance (Note Conditions Limit Units
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 X7R. However, depending application, X5R, also used. (See capacitor section Applications Hints).
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LP5996
Typical Performance Characteristics. Unless otherwise specified, 1.0µF Ceramic, COUT1 COUT2 1.0µF Ceramic, CBYP 10nF, VOUT2(NOM) 1.0V, 25°C, VOUT1(NOM) 3.3V, VOUT2(NOM) 3.3V, Enable pins tied VIN.
Output Voltage Change Temperature Ground Current Load Current,LDO1
20171510
20171513
Ground Current Load Current, LDO2
Ground Current VIN, ILOAD
20171514
20171515
Dropout Voltage ILOAD, LDO1
Dropout Voltage ILOAD, LDO2
20171511
20171512
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LP5996
Typical Performance Characteristics. Unless otherwise specified, 1.0µF Ceramic, COUT1 COUT2 1.0µF Ceramic, CBYP 10nF, VOUT2(NOM) 1.0V, 25°C, VOUT1(NOM) 3.3V, VOUT2(NOM) 3.3V, Enable pins tied VIN. (Continued)
Line Transient, CBYP 10nF Line Transient, CBYP
20171519
20171520
Load Transient, LDO1
Load Transient, LDO2
20171550
20171551
Noise Density, LDO1
Noise Density, LDO2
20171556
20171557
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LP5996
Typical Performance Characteristics. Unless otherwise specified, 1.0µF Ceramic, COUT1 COUT2 1.0µF Ceramic, CBYP 10nF, VOUT2(NOM) 1.0V, 25°C, VOUT1(NOM) 3.3V, VOUT2(NOM) 3.3V, Enable pins tied VIN. (Continued)
Short Circuit Current, LDO1 Short Circuit Current, LDO2
20171552
20171553
Power Supply Rejection Ratio, LDO1
Power Supply Rejection Ratio, LDO2
20171555
20171554
Enable Start-up Time, CBYP
Enable Start-up Time, CBYP 10nF
20171560
20171561
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LP5996
Application Hints
OPERATION DESCRIPTION LP5996 quiescent current, power management designed specifically portable applications requiring minimum board space smallest components. LP5996 contains independently selectable LDOs. first capable sourcing 150mA outputs between 0.8V 3.3V. second source 300mA output voltage 0.8V 3.3V. INPUT CAPACITOR input capacitor required stability. recommended that 1.0µF capacitor connected between LP5996 input ground (this capacitance value increased without limit). 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 coefficient must considered when selecting capacitor ensure capacitance will remain approximately 1.0µF over entire operating temperature range. OUTPUT CAPACITOR LP5996 designed specifically work with very small ceramic output capacitors. 1.0µF ceramic capacitor (temperature types Z5U, X7R) with between 500m, suitable LP5996 application circuit. this device output capacitor should connected between VOUT ground. also possible tantalum film capacitors device output, COUT VOUT), these attractive reasons size cost (see section Capacitor Characteristics). output capacitor must meet requirement minimum value capacitance also have value that within range 500m stability. NO-LOAD STABILITY LP5996 will remain stable regulation with external load. This important consideration some circuits, example CMOS keep-alive applications. CAPACITOR CHARACTERISTICS LP5996 designed work with ceramic capacitors output take advantage benefits they offer. capacitance values range 0.47µF 4.7µF, ceramic capacitors smallest, least expensive have lowest values, thus making them best eliminating high frequency noise. typical 1.0µF ceramic capacitor range 40m, which easily meets requirement stability LP5996.
both input output capacitors, careful interpretation capacitor specification required ensure correct device operation. capacitor value change greatly, depending operating conditions capacitor type. particular, output capacitor selection should take account capacitor parameters, ensure that specification within application. capacitance 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. example, Figure shows typical graph comparing different capacitor case sizes Capacitance Bias plot. shown graph, increasing Bias condition result capacitance value falling below minimum value given recommended capacitor specifications table (0.7µF this case). 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.
20171540
FIGURE Graph Showing Typical Variation Capacitance Bias capacitance value ceramic capacitors varies with temperature. capacitor type X7R, which operates over temperature range -55°C +125°C, will only vary capacitance within 15%. capacitor type similar tolerance over reduced temperature range -55°C +85°C. Many large value ceramic capacitors, larger than manufactured with temperature characteristics. Their capacitance drop more than temperature varies from 25°C 85°C. Therefore recommended over applications where ambient temperature will change significantly above below 25°C. Tantalum capacitors less desirable than ceramic output capacitors because they more expensive when comparing equivalent capacitance voltage ratings 0.47µF 4.7µF range. Another important consideration that tantalum capacitors have higher values than equivalent size ceramics. This means that while possible find tantalum
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LP5996
Application Hints
(Continued)
capacitor with value within stable 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 LP5996 features active high enable pins each regulator, EN2, which turns corresponding when pulled low. device outputs enabled when enable pins high. When enabled regulator output device typically consumes 2nA. application does require Enable switching feature, both enable pins should tied keep regulator output permanently ensure proper operation, signal source used drive enable inputs must able swing above below specified turn-on/off voltage thresholds listed Electrical Characteristics section under VIH. BYPASS CAPACITOR internal voltage reference circuit LP5996 connected CBYP high value internal resistor. external capacitor, connected this pin, forms low-pass
filter which reduces noise level both outputs device. There also some improvement PSSR line transient performance. Internal circuitry ensures rapid charging CBYP capacitor during start-up. 10nF, high quality ceramic capacitor with either dielectric recommended their leakage characteristics noise performance. SAFE AREA OPERATION consideration should given operating conditions avoid excessive thermal dissipation LP5996 triggering thermal shutdown circuit. When both outputs enabled, total power dissipation will PD(LDO1) PD(LDO2) where (VIN VOUT) IOUT each general, device options which have large difference output voltage will dissipate more power with both outputs enabled, input voltage required higher output voltage LDO. such cases, especially elevated ambient temperature, possible operate both outputs maximum current same time.
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LP5996
Physical Dimensions
inches (millimeters) unless otherwise noted
LLP, Lead, Package Package Number SDA10A
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LP5996 Dual Linear Regulator with 300mA 150mA Outputs
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