LP3996 www.ti.com SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 LP3996 Dual Linear Regulator with 300 mA and 150 mA Outputs and Power-On-Reset Check for Samples: LP3996 FEATURES APPLICATIONS • • • • • 1 2 • • • 2 LDO Outputs with Independent Enable 1.5% Accuracy at Room Temperature, 3% Over Temperature Power-On-Reset Function with Adjustable Delay Thermal Shutdown Protection Stable with Ceramic Capacitors DESCRIPTION The LP3996 is a dual low dropout regulator with power-on-reset circuit. The first regulator can source 150 mA, while the second is capable of sourcing 300 mA and has a power-on-reset function included. KEY SPECIFICATIONS • • • • • Cellular Handsets PDAs Wireless Network Adaptors The LP3996 provides 1.5% accuracy requiring an ultra low quiescent current of 35 µA. Separate enable pins allow each output of the LP3996 to be shut down, drawing virtually zero current. Input Voltage Range 2.0V to 6.0V Low Dropout Voltage 210 mV at 300 mA Ultra-Low IQ (Enabled) 35 µA Virtually Zero IQ (Disabled) <10 nA Package Available in Lead-Free Option 10-pin 3 mm x 3 mm The LP3996 is designed to be stable with small footprint ceramic capacitors down to 1 µF. An external capacitor may be used to set the POR delay time as required. The LP3996 is available in fixed output voltages and comes in a 10-pin, 3 mm x 3 mm package. Typical Application Circuit 470 k: LP3996 VIN VIN VOUT1 VOUT1 EN1 EN1 VOUT2 VOUT2 EN2 EN2 POR 1 PF CBYP 10 nF POR SET GND 1 PF 1 PF Sets delay for POR 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2006–2013, Texas Instruments Incorporated LP3996 SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 www.ti.com Functional Block Diagram VOUT1 LDO1 VIN EN1 LDO2 VOUT2 EN2 POR POR CBYP 1 PA + - VREF GND SET Pin Functions Pin No 2 Symbol Name and Function 1 VIN Voltage Supply Input. Connect a 1 µF capacitor between this pin and GND. 2 EN1 Enable Input to Regulator 1. Active high input. High = On. Low = OFF. 3 EN2 Enable Input to Regulator 2. Active high input. High = On. Low = OFF. 4 CBYP Internal Voltage Reference Bypass. Connect a 10nF capacitor from this pin to GND to reduce output noise and improve line transient and PSRR. This pin may be left open. 5 SET Set Delay Input. Connect a capacitor between this pin and GND to set the POR delay time. If left open, there will be no delay. 6 GND Common Ground pin. Connect externally to exposed pad. 7 N/C No Connection. Do not connect to any other pin. 8 POR Power-On Reset Output. Open drain output. Active low indicates under-voltage output on Regulator 2. A pull-up resistor is required for correct operation. 9 VOUT2 Output of Regulator 2. 300 mA maximum current output. Connect a 1 µF capacitor between this pin and GND. 10 VOUT1 Output of Regulator 1. 150 mA maximum current output. Connect a 1 µF capacitor between this pin and GND. Pad GND Common Ground. Connect to Pin 6. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 LP3996 www.ti.com SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 Connection Diagram VOUT1 VOUT2 10 9 POR N/C GND 8 7 6 GND 1 2 3 4 5 VIN EN1 EN2 CBYP SET Top View Figure 1. WSON-10 Package See Package Number DSC0010A Table 1. Additional Device Information (1) (1) VOUT1/VOUT2 (V) ORDER NUMBER 0.8/3.3 LP3996SD/X-0833/NOPB 1.0/1.8 LP3996SD/X-1018/NOPB 1.5/2.5 LP3996SD/X-1525/NOPB 1.8/3.3 LP3996SD/X-1833/NOPB 2.5/3.3 LP3996SD/X-2533/NOPB 2.8/2.8 LP3996SD/X-2828/NOPB 3.0/3.0 LP3996SD/X-3030/NOPB 3.0/3.3 LP3996SD/X-3033/NOPB 3.3/0.8 LP3996SD/X-3308/NOPB 3.3/3.3 LP3996SD/X-3333/NOPB For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 3 LP3996 SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 www.ti.com ABSOLUTE MAXIMUM RATINGS (1) (2) Input Voltage to GND –0.3V to 6.5V VOUT1, VOUT2 EN1 and EN2 Voltage to GND –0.3V to (VIN + 0.3V) with 6.5V (max) POR to GND –0.3V to 6.5V Junction Temperature (TJ-MAX) 150°C Lead/Pad Temp (3) 235°C Storage Temperature –65°C to 150°C Continuous Power Dissipation Internally Limited (4) ESD Rating (5) (1) (2) (3) (4) (5) Human Body Model 2.0kV Machine Model 200V All Voltages are with respect to the potential at the GND pin. Absolute Maximum Ratings are limits beyond which damage can occur. Recommended Operating Conditions are conditions under which operation of the device is ensured. Recommended Operating Conditions do not imply ensured performance limits. For ensured performance limits and associated test conditions, see the Electrical Characteristics tables. For detailed soldering specifications and information, please refer to Texas Instruments Application Note AN-1187, Leadless Leadframe Package. Internal thermal shutdown circuitry protects the device from permanent damage. The human body model is 100 pF discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged directly into each pin. RECOMMENDED OPERATING CONDITIONS (1) (2) Input Voltage 2.0V to 6.0V EN1, EN2, POR Voltage 0 to (VIN + 0.3V) to 6.0V (max) Junction Temperature –40°C to 125°C Ambient Temperature TA Range (3) (1) (2) (3) –40°C to 85°C Absolute Maximum Ratings are limits beyond which damage can occur. Recommended Operating Conditions are conditions under which operation of the device is ensured. Recommended Operating Conditions do not imply ensured performance limits. For ensured performance limits and associated test conditions, see the Electrical Characteristics tables. All Voltages are with respect to the potential at the GND pin. The maximum ambient temperature (TA(max)) is dependant on the maximum operating junction temperature (TJ(max-op) = 125°C), the maximum power dissipation of the device in the application (PD(max)), and the junction to ambient thermal resistance of the part/package in the application (θJA), as given by the following equation: TA(max) = TJ(max-op) - (θJA × PD(max)). THERMAL PROPERTIES (1) Junction-To-Ambient Thermal Resistance (2) θJA WSON-10 Package (1) (2) 4 55°C/W Absolute Maximum Ratings are limits beyond which damage can occur. Recommended Operating Conditions are conditions under which operation of the device is ensured. Recommended Operating Conditions do not imply ensured performance limits. For ensured performance limits and associated test conditions, see the Electrical Characteristics tables. Junction-to-ambient thermal resistance is dependant on the application and board layout. In applications where high maximum power dissipation is possible; special care must be paid to thermal dissipation issues in board design. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 LP3996 www.ti.com SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 ELECTRICAL CHARACTERISTICS (1) (2) Unless otherwise noted, VEN = 950 mV, VIN = VOUT + 1.0V, or 2.0V, whichever is higher, where VOUT is the higher of VOUT1 and VOUT2. CIN = 1 µF, IOUT = 1 mA, COUT1 = COUT2 = 1.0 µF. Typical values and limits appearing in normal type apply for TA = 25°C. Limits appearing in boldface type apply over the full junction temperature range for operation, −40 to +125°C. SYMBOL PARAMETER VIN Input Voltage ΔVOUT Output Voltage Tolerance VDO IQ (1) (2) (3) (4) CONDITIONS See (3) IOUT = 1mA MIN MAX 2 6 –2.5 –3.75 +2.5 +3.75 VOUT ≤ 1.5V –2.75 –4 +2.75 +4 VIN = (VOUT(NOM) + 1.0V) to 6.0V Load Regulation Error Quiescent Current LIMIT 1.5V < VOUT ≤ 3.3V Line Regulation Error Dropout Voltage (4) TYP 0.03 0.3 IOUT = 1 mA to 150 mA (LDO 1) 85 155 IOUT = 1 mA to 300 mA (LDO 2) 26 85 IOUT = 1 mA to 150 mA (LDO 1) 110 220 IOUT = 1 mA to 300 mA (LDO 2) 210 550 LDO 1 ON, LDO 2 ON IOUT1= IOUT2 = 0 mA 35 100 LDO 1 ON, LDO 2 OFF IOUT1 = 150 mA 45 110 LDO 1 OFF, LDO 2 ON IOUT2 = 300 mA 45 110 LDO 1 ON, LDO 2 ON IOUT1 = 150 mA, IOUT2 = 300 mA 70 170 VEN1 = VEN2 = 0.4V 0.5 10 UNITS V % %/V µV/mA mV µA nA All Voltages are with respect to the potential at the GND pin. Min and Max limits are specified by design, test or statistical analysis. Typical numbers are not ensured, but do represent the most likely norm. VIN(MIN) = VOUT(NOM) +0.5V, or 2.0V, whichever is higher. Dropout voltage is voltage difference between input and output at which the output voltage drops to 100 mV below its nominal value. This parameter only for output voltages above 2.0V Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 5 LP3996 SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 www.ti.com ELECTRICAL CHARACTERISTICS(1)(2) (continued) Unless otherwise noted, VEN = 950 mV, VIN = VOUT + 1.0V, or 2.0V, whichever is higher, where VOUT is the higher of VOUT1 and VOUT2. CIN = 1 µF, IOUT = 1 mA, COUT1 = COUT2 = 1.0 µF. Typical values and limits appearing in normal type apply for TA = 25°C. Limits appearing in boldface type apply over the full junction temperature range for operation, −40 to +125°C. SYMBOL ISC PARAMETER Short Circuit Current Limit IOUT Maximum Output Current Power Supply Rejection Ratio (5) PSRR Output noise Voltage (5) en TSHUTDOWN Thermal Shutdown CONDITIONS TYP LIMIT MIN MAX LDO 1 420 750 LDO 2 550 840 LDO 1 150 LDO 2 300 f = 1kHz, IOUT = 1mA to 150 mA CBYP = 10 nF LDO1 58 LDO2 70 f = 20 kHz, IOUT = 1mA to 150 mA CBYP = 10 nF LDO1 45 LDO2 60 BW = 10 Hz to 100kHz CBYP = 10 nF VOUT = 0.8V 36 VOUT = 3.3V 75 UNITS mA mA dB µVRMS Temperature 160 Hysteresis 20 VEN = 0.0V 0.005 0.1 2 5 °C Enable Control Characteristics IEN Input Current at VEN1 or VEN2 VEN = 6V VIL Low Input Threshold at VEN1 or VEN2 VIH High Input Threshold at VEN1 or VEN2 0.4 0.95 µA V V POR Output Characteristics VTH Low Threshold % 0f VOUT2 (NOM) Flag ON High Threshold % 0f VOUT2 (NOM) Flag OFF 88 IPOR Leakage Current Flag OFF, VPOR = 6.5V 30 nA VOL Flag Output Low Voltage ISINK = 250 µA 20 mV µs 96 % Timing Characteristics TON Turn On Time (5) To 95% Level CBYP = 10 nF 300 Transient Response Line Transient Response |δVOUT| (5) Trise = Tfall = 10 µs δVIN = 1VCBYP = 10 nF 20 Load Transient Response |δVOUT| (5) Trise = Tfall = 1 µs LDO 1 IOUT = 1 mA to 150 mA 175 LDO 2 IOUT = 1 mA to 300 mA 150 mV (pk - pk) SET Input Characteristics ISET SET Pin Current Source VSET = 0V 1.3 µA VTH(SET) SET Pin Threshold Voltage POR = High 1.25 V (5) 6 This electrical specification is specified by design. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 LP3996 www.ti.com SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS SYMBOL COUT PARAMETER CONDITIONS NOM Capacitance (1) Output Capacitance 1.0 ESR (1) LIMIT MIN MAX UNITS 0.7 5 µF 500 mΩ The Capacitor tolerance should be 30% or better over temperature. The full operating conditions for the application should be considered when selecting a suitable capacitor to ensure that the minimum value of capacitance is always met. Recommended capacitor is X7R. However, depending on the application, X5R, Y5V and Z5U can also be used. (See Capacitor sections in APPLICATION HINTS.) Transient Test Conditions Figure 2. PSRR Input Signal VOUT tr VOUT ± tolerance tr VIN trise = tfall = 10 Ps Line Step = 1V ILOAD(LDO1) = 150 mA ILOAD(LDO2) = 300 mA VOUT(NOM) + 1V Figure 3. Line Transient Input Test Signal VOUT tr VOUT ± tolerance tr VIN Load Step LDO1 = 1 mA to 150 mA Load Step LDO2 = 1 mA to 300 mA Load Rise Time = Fall = 1 Ps Figure 4. Load Transient Input Signal Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 7 LP3996 SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified, CIN = 1.0 µF Ceramic, COUT1 = COUT2 = 1.0 µF Ceramic, CBYP = 10 nF, VIN = VOUT2(NOM) + 1.0V, TA = 25°C, VOUT1(NOM) = 3.3V, VOUT2(NOM) = 3.3V, Enable pins are tied to VIN. 8 Output Voltage Change vs Temperature Ground Current vs Load Current, LDO1 Figure 5. Figure 6. Ground Current vs Load Current, LDO2 Ground Current vs VIN. ILOAD = 1mA Figure 7. Figure 8. Dropout Voltage vs ILOAD, LDO1 Dropout Voltage vs ILOAD, LDO2 Figure 9. Figure 10. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 LP3996 www.ti.com SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified, CIN = 1.0 µF Ceramic, COUT1 = COUT2 = 1.0 µF Ceramic, CBYP = 10 nF, VIN = VOUT2(NOM) + 1.0V, TA = 25°C, VOUT1(NOM) = 3.3V, VOUT2(NOM) = 3.3V, Enable pins are tied to VIN. Short Circuit Current, LDO1 Short Circuit Current, LDO2 Figure 11. Figure 12. Power Supply Rejection Ratio, LDO1 Power Supply Rejection Ratio, LDO2 Figure 13. Figure 14. Enable Start-up Time, CBYP=0 Enable Start-up Time, CBYP=10nF Figure 15. Figure 16. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 9 LP3996 SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified, CIN = 1.0 µF Ceramic, COUT1 = COUT2 = 1.0 µF Ceramic, CBYP = 10 nF, VIN = VOUT2(NOM) + 1.0V, TA = 25°C, VOUT1(NOM) = 3.3V, VOUT2(NOM) = 3.3V, Enable pins are tied to VIN. 10 Line Transient, CBYP=10nF Line Transient, CBYP=0 Figure 17. Figure 18. Load Transient, LDO1 Load Transient, LDO2 Figure 19. Figure 20. Noise Density LDO1 Noise Density, LDO2 Figure 21. Figure 22. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 LP3996 www.ti.com SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified, CIN = 1.0 µF Ceramic, COUT1 = COUT2 = 1.0 µF Ceramic, CBYP = 10 nF, VIN = VOUT2(NOM) + 1.0V, TA = 25°C, VOUT1(NOM) = 3.3V, VOUT2(NOM) = 3.3V, Enable pins are tied to VIN. Power-on-Reset Start-up Operation Power-on-Reset Shutdown Operation Figure 23. Figure 24. POR Delay Time Figure 25. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 11 LP3996 SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 www.ti.com APPLICATION HINTS Operation Description The LP3996 is a low quiescent current, power management IC, designed specifically for portable applications requiring minimum board space and smallest components. The LP3996 contains two independently selectable LDOs. The first is capable of sourcing 150 mA at outputs between 0.8V and 3.3V. The second can source 300 mA at an output voltage of 0.8V to 3.3V. In addition, LDO2 contains power good flag circuit, which monitors the output voltage and indicates when it is within 8% of its nominal value. The flag will also act as a power-on-reset signal and, by adding an external capacitor; a delay may be programmed for the POR output. Input Capacitor An input capacitor is required for stability. It is recommended that a 1.0 µF capacitor be connected between the LP3996 input pin and ground (this capacitance value may be increased without limit). This capacitor must be located a distance of not more than 1 cm from the input pin and returned to a clean analogue ground. Any good quality ceramic, tantalum, or film capacitor may be used at the input. Important: Tantalum capacitors can suffer catastrophic failures due to surge current when connected to a lowimpedance source of power (like a battery or a very large capacitor). If a tantalum capacitor is used at the input, it must be ensured by the manufacturer to have a surge current rating sufficient for the application. There are no requirements for the ESR (Equivalent Series Resistance) on the input capacitor, but tolerance and temperature coefficient must be considered when selecting the capacitor to ensure the capacitance will remain approximately 1.0 µF over the entire operating temperature range. Output Capacitor The LP3996 is designed specifically to work with very small ceramic output capacitors. A 1.0 µF ceramic capacitor (temperature types Z5U, Y5V or X7R) with ESR between 5 mΩ to 500 mΩ, is suitable in the LP3996 application circuit. For this device the output capacitor should be connected between the VOUT pin and ground. It is also possible to use tantalum or film capacitors at the device output, COUT (or VOUT), but these are not as attractive for reasons of size and cost (see Capacitor Characteristics). The output capacitor must meet the requirement for the minimum value of capacitance and also have an ESR value that is within the range 5 mΩ to 500 mΩ for stability. No-Load Stability The LP3996 will remain stable and in regulation with no external load. This is an important consideration in some circuits, for example CMOS RAM keep-alive applications. 12 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 LP3996 www.ti.com SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 Capacitor Characteristics The LP3996 is designed to work with ceramic capacitors on the output to take advantage of the benefits they offer. For capacitance values in the range of 0.47 µF to 4.7 µF, ceramic capacitors are the smallest, least expensive and have the lowest ESR values, thus making them best for eliminating high frequency noise. The ESR of a typical 1.0 µF ceramic capacitor is in the range of 20 mΩ to 40 mΩ, which easily meets the ESR requirement for stability for the LP3996. For both input and output capacitors, careful interpretation of the capacitor specification is required to ensure correct device operation. The capacitor value can change greatly, depending on the operating conditions and capacitor type. CAP VALUE (% OF NOM. 1 uF) In particular, the output capacitor selection should take account of all the capacitor parameters, to ensure that the specification is met within the application. The capacitance can vary with DC bias conditions as well as temperature and frequency of operation. Capacitor values will also show some decrease over time due to aging. The capacitor parameters are also dependant on the particular case size, with smaller sizes giving poorer performance figures in general. As an example, Figure 26 shows a typical graph comparing different capacitor case sizes in a Capacitance vs. DC Bias plot. As shown in the graph, increasing the DC Bias condition can result in the capacitance value falling below the minimum value given in the recommended capacitor specifications table (0.7 µF in this case). Note that the graph shows the capacitance out of spec for the 0402 case size capacitor at higher bias voltages. It is therefore recommended that the capacitor manufacturers’ specifications for the nominal value capacitor are consulted for all conditions, as some capacitor sizes (that is, 0402) may not be suitable in the actual application. 0603, 10V, X5R 100% 80% 60% 0402, 6.3V, X5R 40%_ 20% _ 0 1.0 2.0 _ 3.0 _ 4.0 _ 5.0 _ DC BIAS (V) Figure 26. Graph Showing a Typical Variation in Capacitance vs DC Bias The ceramic capacitor’s capacitance can vary with temperature. The capacitor type X7R, which operates over a temperature range of –55°C to +125°C, will only vary the capacitance to within ±15%. The capacitor type X5R has a similar tolerance over a reduced temperature range of –55°C to +85°C. Many large value ceramic capacitors, larger than 1µF are manufactured with Z5U or Y5V temperature characteristics. Their capacitance can drop by more than 50% as the temperature varies from 25°C to 85°C. Therefore X7R is recommended over Z5U and Y5V in applications where the ambient temperature will change significantly above or below 25°C. Tantalum capacitors are less desirable than ceramic for use as output capacitors because they are more expensive when comparing equivalent capacitance and voltage ratings in the 0.47 µF to 4.7 µF range. Another important consideration is that tantalum capacitors have higher ESR values than equivalent size ceramics. This means that while it may be possible to find a tantalum capacitor with an ESR value within the stable range, it would have to be larger in capacitance (which means bigger and more costly) than a ceramic capacitor with the same ESR value. It should also be noted that the ESR of a typical tantalum will increase about 2:1 as the temperature goes from 25°C down to –40°C, so some guard band must be allowed. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 13 LP3996 SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 www.ti.com Enable Control The LP3996 features active high enable pins for each regulator, EN1 and EN2, which turns the corresponding LDO off when pulled low. The device outputs are enabled when the enable lines are set to high. When not enabled the regulator output is off and the device typically consumes 2nA. If the application does not require the Enable switching feature, one or both enable pins should be tied to VIN to keep the regulator output permanently on. To ensure proper operation, the signal source used to drive the enable inputs must be able to swing above and below the specified turn-on / off voltage thresholds listed in the Electrical Characteristics section under VIL and VIH. Power-On-Reset The POR pin is an open-drain output which will be set to Low whenever the output of LDO2 falls out of regulation to approximately 90% of its nominal value. An external pull-up resistor, connected to VOUT or VIN, is required on this pin. During start-up, or whenever a fault condition is removed, the POR flag will return to the High state after the output reaches approximately 96% of its nominal value. By connecting a capacitor from the SET pin to GND, a delay to the rising condition of the POR flag may be introduced. The delayed signal may then be used as a Power-on -Reset for a microprocessor within the user's application. The duration of the delay is determined by the time to charge the delay capacitor to a threshold voltage of 1.25V at 1.2 µA from the SET pin as in the formula below. VTH(SET) X CSET tDELAY = ISET (1) A 0.1 µF capacitor will introduce a delay of approximately 100 ms. Bypass Capacitor The internal voltage reference circuit of the LP3996 is connected to the CBYP pin via a high value internal resistor. An external capacitor, connected to this pin, forms a low-pass filter which reduces the noise level on both outputs of the device. There is also some improvement in PSSR and line transient performance. Internal circuitry ensures rapid charging of the CBYP capacitor during start-up. A 10 nF, high quality ceramic capacitor with either NPO or COG dielectric is recommended due to their low leakage characteristics and low noise performance. Safe Area of Operation Due consideration should be given to operating conditions to avoid excessive thermal dissipation of the LP3996 or triggering its thermal shutdown circuit. When both outputs are enabled, the total power dissipation will be PD(LDO1) + PD(LDO2) Where PD = (VIN - VOUT) x IOUT for each LDO. In general, device options which have a large difference in output voltage will dissipate more power when both outputs are enabled, due to the input voltage required for the higher output voltage LDO. In such cases, especially at elevated ambient temperature, it may not be possible to operate both outputs at maximum current at the same time. 14 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 LP3996 www.ti.com SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013 REVISION HISTORY Changes from Revision B (March 2013) to Revision C • Page Changed layout of National Data Sheet to TI format; ......................................................................................................... 14 Changes from Revision C (March 2013) to Revision D • Page Added Additional Device Table back to datasheet ............................................................................................................... 3 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3996 15 PACKAGE OPTION ADDENDUM www.ti.com 10-Aug-2016 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LP3996SD-0833/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM LP3996SD-1018/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM LP3996SD-1525/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM LP3996SD-1833/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM L228B LP3996SD-2533/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM L229B LP3996SD-3030/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 L172B LP3996SD-3033/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 L170B LP3996SD-3333/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 L173B LP3996SDX-0833/NOPB ACTIVE WSON DSC 10 TBD Call TI Call TI -40 to 85 L167B LP3996SDX-1018/NOPB ACTIVE WSON DSC 10 TBD Call TI Call TI LP3996SDX-1525/NOPB ACTIVE WSON DSC 10 TBD Call TI Call TI LP3996SDX-1833/NOPB ACTIVE WSON DSC 10 TBD Call TI Call TI L228B LP3996SDX-2533/NOPB ACTIVE WSON DSC 10 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM L229B LP3996SDX-2828/NOPB ACTIVE WSON DSC 10 TBD Call TI Call TI -40 to 85 L171B LP3996SDX-3030/NOPB ACTIVE WSON DSC 10 TBD Call TI Call TI -40 to 85 L172B LP3996SDX-3033/NOPB ACTIVE WSON DSC 10 TBD Call TI Call TI -40 to 85 L170B LP3996SDX-3308/NOPB ACTIVE WSON DSC 10 TBD Call TI Call TI -40 to 85 L188B LP3996SDX-3333/NOPB ACTIVE WSON DSC 10 TBD Call TI Call TI -40 to 85 L173B 4500 Addendum-Page 1 -40 to 85 L167B L227B -40 to 85 L168B L227B -40 to 85 L168B Samples PACKAGE OPTION ADDENDUM www.ti.com 10-Aug-2016 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. 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OTHER QUALIFIED VERSIONS OF LP3996 : • Automotive: LP3996-Q1 NOTE: Qualified Version Definitions: Addendum-Page 2 PACKAGE OPTION ADDENDUM www.ti.com 10-Aug-2016 • Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects Addendum-Page 3 PACKAGE MATERIALS INFORMATION www.ti.com 10-Aug-2016 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LP3996SD-0833/NOPB WSON DSC 10 1000 178.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 LP3996SD-1018/NOPB WSON DSC 10 1000 178.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 LP3996SD-1525/NOPB WSON DSC 10 1000 178.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 LP3996SD-1833/NOPB WSON DSC 10 1000 178.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 LP3996SD-2533/NOPB WSON DSC 10 1000 178.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 LP3996SD-3030/NOPB WSON DSC 10 1000 178.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 LP3996SD-3033/NOPB WSON DSC 10 1000 178.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 LP3996SD-3333/NOPB WSON DSC 10 1000 178.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 LP3996SDX-2533/NOPB WSON DSC 10 4500 330.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 10-Aug-2016 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP3996SD-0833/NOPB WSON DSC 10 1000 210.0 185.0 35.0 LP3996SD-1018/NOPB WSON DSC 10 1000 210.0 185.0 35.0 LP3996SD-1525/NOPB WSON DSC 10 1000 210.0 185.0 35.0 LP3996SD-1833/NOPB WSON DSC 10 1000 210.0 185.0 35.0 LP3996SD-2533/NOPB WSON DSC 10 1000 210.0 185.0 35.0 LP3996SD-3030/NOPB WSON DSC 10 1000 210.0 185.0 35.0 LP3996SD-3033/NOPB WSON DSC 10 1000 210.0 185.0 35.0 LP3996SD-3333/NOPB WSON DSC 10 1000 210.0 185.0 35.0 LP3996SDX-2533/NOPB WSON DSC 10 4500 367.0 367.0 35.0 Pack Materials-Page 2 MECHANICAL DATA DSC0010A SDA10A (Rev A) www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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