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LP2992

www.ti.com

SNVS171G –NOVEMBER 2001–REVISED MARCH 2013

LP2992 Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator in SOT-23 and

WSON Packages Designed for Use with Very Low ESR Output Capacitors

Check for Samples: LP2992

FEATURES

DESCRIPTION

The LP2992 is a 250 mA, fixed-output voltage

• Ultra Low Dropout Voltage

regulator designed to provide ultra low-dropout and

• Specified 250 mA Output Current

low noise in battery powered applications.

• Smallest Possible Size (SOT-23, WSON

Using an optimized VIP (Vertically Integrated PNP)

Package)

process, the LP2992 delivers unequaled performance

• Requires Minimum External Components

in all specifications critical to battery-powered

designs:

• Stable with Low-ESR Output Capacitor

• <1 µA Quiescent Current when Shut Down

Dropout Voltage: Typically 450 mV @ 250 mA load,

and 5 mV @ 1 mA load.

• Low Ground Pin Current at all Loads

• Output Voltage Accuracy 1% (A Grade)

Ground Pin Current: Typically 1500 µA @ 250 mA

load, and 75 µA @ 1 mA load.

• High Peak Current Capability

• Wide Supply Voltage Range (16V Max)

Enhanced Stability: The LP2992 is stable with

output capacitor ESR as low as 5 mΩ, which allows

• Low Z

OUT

: 0.3Ω Typical (10 Hz to 1 MHz)

the use of ceramic capacitors on the output.

• Overtemperature/overcurrent Protection

Sleep Mode: Less than 1 µA quiescent current when

• −40°C to +125°C Junction Temperature Range

ON/OFF pin is pulled low.

• Custom Voltages Available

Smallest Possible Size: SOT-23 and WSON

packages use absolute minimum board space.

APPLICATIONS

Precision Output: 1% tolerance output voltages

• Cellular Phone

available (A grade).

• Palmtop/Laptop Computer

Low Noise: By adding a 10 nF bypass capacitor,

• Personal Digital Assistant (PDA)

output noise can be reduced to 30 µV (typical).

• Camcorder, Personal Stereo, Camera

Multiple voltage options, from 1.5V to 5.0V, are

available as standard products. Consult factory for

custom voltages.

Block Diagram

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.

2All 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.

Summary of content (26 pages)

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LP2992 www.ti.com SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 LP2992 Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator in SOT-23 and WSON Packages Designed for Use with Very Low ESR Output Capacitors Check for Samples: LP2992 FEATURES DESCRIPTION • • • The LP2992 is a 250 mA, fixed-output voltage regulator designed to provide ultra low-dropout and low noise in battery powered applications.
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LP2992 SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 www.ti.com Basic Application Circuit *ON/OFF input must be actively terminated. Tie to VIN if this function is not to be used. **Minimum capacitance is shown to ensure stability (may be increased without limit). Ceramic capacitor required for output (see Application Hints). ***Reduces output noise (may be omitted if application is not noise critical). Use ceramic or film type with very low leakage current (see Application Hints).
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LP2992 www.ti.com SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 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. Absolute Maximum Ratings (1) (2) Storage Temperature Range −65°C to +150°C Operating Junction Temperature Range −40°C to +125°C Lead Temp. (Soldering, 5 sec.) ESD Rating 260°C (3) 2 kV Power Dissipation (4) Internally Limited −0.
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LP2992 SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 www.ti.com Electrical Characteristics (continued) Limits in standard typeface are for TJ = 25°C. and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, CIN = 1 µF, COUT = 4.7 µF, VON/OFF = 2V. LP2992AI-X.X Symbol Parameter Conditions Min VIN–VO Dropout Voltage (2) IL = 0 0.
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LP2992 www.ti.com SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 Typical Performance Characteristics Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, TA = 25°C, ON/OFF pin is tied to VIN. VOUT vs Temperature Short-Circuit Current Figure 3. Figure 4. Short-Circuit Current Short Circuit Current vs Output Voltage Figure 5. Figure 6. Ripple Rejection Ripple Rejection Figure 7. Figure 8.
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LP2992 SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, TA = 25°C, ON/OFF pin is tied to VIN. 6 Ripple Rejection Ripple Rejection Figure 9. Figure 10. Ripple Rejection Ripple Rejection Figure 11. Figure 12. Ripple Rejection Ripple Rejection Figure 13. Figure 14.
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LP2992 www.ti.com SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, TA = 25°C, ON/OFF pin is tied to VIN. Ripple Rejection Output Impedance vs Frequency Figure 15. Figure 16. Output Impedance vs Frequency Output Noise Density Figure 17. Figure 18. Output Noise Density GND Pin vs Load Current Figure 19. Figure 20.
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LP2992 SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, TA = 25°C, ON/OFF pin is tied to VIN. 8 Dropout Voltage vs Temperature Input Current vs Pin Figure 21. Figure 22. Ignd vs Load and Temperature Instantaneous Short Circuit Current Figure 23. Figure 24. Load Transient Response Load Transient Response Figure 25. Figure 26.
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LP2992 www.ti.com SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, TA = 25°C, ON/OFF pin is tied to VIN. Load Transient Response Line Transient Response Figure 27. Figure 28. Line Transient Response Line Transient Response Figure 29. Figure 30. Line Transient Response Turn-On Time Figure 31. Figure 32.
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LP2992 SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, TA = 25°C, ON/OFF pin is tied to VIN. Turn-On Time Turn-On Time Figure 33. Figure 34. Turn-On Time Figure 35.
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LP2992 www.ti.com SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 APPLICATION HINTS EXTERNAL CAPACITORS Like any low-dropout regulator, the LP2992 requires external capacitors for regulator stability. These capacitors must be correctly selected for good performance. Input Capacitor An input capacitor whose capacitance is ≥ 1 µF is required between the LP2992 input and ground (the amount of capacitance may be increased without limit).
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LP2992 SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 www.ti.com Noise Bypass Capacitor: Connecting a 10 nF capacitor to the Bypass pin significantly reduces noise on the regulator output. It should be noted that the capacitor is connected directly to a high-impedance circuit in the bandgap reference. Because this circuit has only a few microamperes flowing in it, any significant loading on this node will cause a change in the regulated output voltage.
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LP2992 www.ti.com SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 REVERSE INPUT-OUTPUT VOLTAGE The PNP power transistor used as the pass element in the LP2992 has an inherent diode connected between the regulator output and input. During normal operation (where the input voltage is higher than the output) this diode is reverse-biased. However, if the output is pulled above the input, this diode will turn ON and current will flow into the regulator output.
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LP2992 SNVS171G – NOVEMBER 2001 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision F (March 2013) to Revision G • 14 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.com 20-Mar-2014 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) LP2992AILD-1.5/NOPB ACTIVE WSON NGD 6 1000 Green (RoHS & no Sb/Br) CU SN Level-3-260C-168 HR -40 to 125 L011A LP2992AILD-1.8/NOPB ACTIVE WSON NGD 6 1000 Green (RoHS & no Sb/Br) CU SN Level-3-260C-168 HR -40 to 125 L012A LP2992AILD-3.
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PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 20-Mar-2014 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) LP2992AIM5X-2.5/NOPB ACTIVE SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LFDA LP2992AIM5X-3.3/NOPB ACTIVE SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LFEA LP2992AIM5X-5.
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PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 20-Mar-2014 Status (1) LP2992IM5-3.3/NOPB Package Type Package Pins Package Drawing Qty ACTIVE SOT-23 DBV 5 1000 Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LFEB (4/5) LP2992IM5-5.0 NRND SOT-23 DBV 5 1000 TBD Call TI Call TI -40 to 125 LFFB LP2992IM5-5.
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PACKAGE OPTION ADDENDUM www.ti.com 20-Mar-2014 (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 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 LP2992AILD-1.5/NOPB WSON NGD 6 1000 178.0 12.4 3.6 3.2 1.0 8.0 12.0 Q1 LP2992AILD-1.8/NOPB WSON NGD 6 1000 178.0 12.4 3.6 3.2 1.0 8.0 12.0 Q1 LP2992AILD-3.3/NOPB WSON NGD 6 1000 178.0 12.4 3.6 3.2 1.0 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 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 LP2992AIM5X-1.8/NOPB SOT-23 DBV 5 3000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LP2992AIM5X-2.5/NOPB SOT-23 DBV 5 3000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LP2992AIM5X-3.3/NOPB SOT-23 DBV 5 3000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LP2992AIM5X-5.0/NOPB SOT-23 DBV 5 3000 178.0 8.4 3.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP2992AILD-1.5/NOPB WSON NGD 6 1000 213.0 191.0 55.0 LP2992AILD-1.8/NOPB WSON NGD 6 1000 213.0 191.0 55.0 LP2992AILD-3.3/NOPB WSON NGD 6 1000 213.0 191.0 55.0 LP2992AILD-5.0/NOPB WSON NGD 6 1000 213.0 191.0 55.0 LP2992AILDX-1.8/NOPB WSON NGD 6 4500 367.0 367.0 35.0 LP2992AILDX-3.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP2992AIM5X-3.3/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 LP2992AIM5X-5.0/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 LP2992ILD-1.8 WSON NGD 6 1000 210.0 185.0 35.0 LP2992ILD-1.8/NOPB WSON NGD 6 1000 213.0 191.0 55.0 LP2992ILD-2.5/NOPB WSON NGD 6 1000 213.0 191.0 55.0 LP2992ILD-3.3/NOPB WSON NGD 6 1000 213.0 191.0 55.
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MECHANICAL DATA NGD0006A www.ti.
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