Datasheet

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LP5951

OUT

GND

Enable Control,

active high

Load

1 PF

LP5951

www.ti.com

SNVS345F –JUNE 2006–REVISED MAY 2013

LP5951 Micropower, 150mA Low-Dropout CMOS Voltage Regulator

Check for Samples: LP5951

FEATURES

DESCRIPTION

The LP5951 regulator is designed to meet the

• Excellent Line Transient Response: ±2mV typ.

requirements of portable, battery-powered systems

• Excellent PSRR: -60dB at 1kHz typ.

providing a regulated output voltage and low

• Low Quiescent Current of 29µA typ.

quiescent current. When switched to shutdown mode

via a logic signal at the Enable pin, the power

• 1.8 to 5.5V Input Voltage Range

consumption is reduced to virtually zero.

• Small SC70-5 and SOT-23-5 Packages

The LP5951 is designed to be stable with small 1µF

• Fast Turn-on Time of 30µs typ.

ceramic capacitors.

• Typ. < 1nA Quiescent Current in Shutdown

The LP5951 also features internal protection against

• Ensured 150mA Output Current

short-circuit currents and over-temperature

• Output Voltage Range: 1.3V to 3.7V

conditions.

• Logic Controlled Enable 0.4V/0.9V

Performance is specified for a -40°C to 125°C

• Good Load Transient Response of 50mVpp

temperature range.

typ.

The device is available in SOT-23-5 and SC70-5

• Thermal-overload and Short-circuit Protection

package.

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

The device is available in fixed output voltages in the

range of 1.3V to 3.7V. For availability, please contact

APPLICATIONS

your local TI sales office.

• General Purpose

Typical Application Circuit

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 (22 pages)

PAGE 1
LP5951 www.ti.com SNVS345F – JUNE 2006 – REVISED MAY 2013 LP5951 Micropower, 150mA Low-Dropout CMOS Voltage Regulator Check for Samples: LP5951 FEATURES DESCRIPTION • • • • • • • • • • • The LP5951 regulator is designed to meet the requirements of portable, battery-powered systems providing a regulated output voltage and low quiescent current. When switched to shutdown mode via a logic signal at the Enable pin, the power consumption is reduced to virtually zero.
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LP5951 SNVS345F – JUNE 2006 – REVISED MAY 2013 www.ti.com Connection Diagram Vout 5 Vout 5 NC 4 1 Vin 2 GND 1 Vin 3 EN Figure 1. 5-Lead SOT-23 Package – Top View See Package Number DBV NC 4 2 GND 3 EN Figure 2. 5-Lead SC70 Package – Top View See Package Number DCK PIN DESCRIPTIONS Pin Number Pin Name Description 1 VIN Input Voltage. Input range: 1.8V to 5.5V 2 GND Ground 3 EN Enable pin logic input: Low = shutdown, High = normal operation. This pin should not be left floating.
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LP5951 www.ti.com SNVS345F – JUNE 2006 – REVISED MAY 2013 Operating Ratings (1) (2) Input Voltage Range (VIN) 1.8V to 5.5V VEN Input Voltage 0 to (VIN + 0.3V) Junction Temperature (TJ) Range -40°C to + 125°C Ambient Temperature (TA) Range (1) (2) (3) See (3) Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of the device is ensured. Operating Ratings do not imply ensured performance limits.
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LP5951 SNVS345F – JUNE 2006 – REVISED MAY 2013 Electrical Characteristics (1) www.ti.com (2) Typical values and limits appearing in standard typeface are for TA = 25°C. Limits appearing in boldface type apply over the full operating temperature range: -40°C ≤ TJ ≤ +125°C. Unless otherwise noted, VIN = VOUT(NOM) + 1V, CIN = 1µF, COUT = 1µF, VEN = 0.9V. Symbol VIN ΔVOUT VDO Parameter Condition Typ Limit Units Min Max Input Voltage VIN ≥ VOUT(NOM) + VDO 1.8 5.
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LP5951 www.ti.com SNVS345F – JUNE 2006 – REVISED MAY 2013 Output Capacitor, Recommended Specification Symbol COUT Parameter Output Capacitance Conditions Value Capacitance (2) IOUT = 150mA, VIN = 5.0V 1.0 ESR (1) (2) Limit (1) Units Min Max 0.7 47 µF 0.003 0.300 Ω Min and Max limits are ensured by design The capacitor tolerance should be 30% or better over temperature.
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LP5951 SNVS345F – JUNE 2006 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics Unless otherwise specified, CIN = 1µF ceramic, COUT = 1µF ceramic, VIN = VOUT(NOM) + 1V, TA = 25°C, Enable pin is tied to VIN. 0 ÂVOUT 150 0 TIME (50 µs/DIV) Figure 3. Figure 4. Line Transient Response Line Transient Response LP5951-3.3 VIN CIN, COUT = 1.0 µF IL = 150 mA (1V/DIV) 2.9 CIN = 1.0 µF COUT = 1.5 µF 4.9 4.3 IL = 150 mA ÂVOUT 2.3 TIME (100 µs/DIV) TIME (100 µs/DIV) Figure 5.
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LP5951 www.ti.com SNVS345F – JUNE 2006 – REVISED MAY 2013 Typical Performance Characteristics (continued) Unless otherwise specified, CIN = 1µF ceramic, COUT = 1µF ceramic, VIN = VOUT(NOM) + 1V, TA = 25°C, Enable pin is tied to VIN. 1.0 Output Voltage Change vs Temperature Ground Current vs VIN 40.0 LP5951-1.3 IL = 1 mA IL = 1 mA LP5951-1.3 38.0 0.8 TA = 125oC 34.0 32.0 0.4 IGND (PA) VOUT CHANGE (%) 36.0 0.6 0.2 30.0 TA = 25oC 28.0 26.0 0.0 24.0 22.0 -0.2 TA = -40oC 20.0 -0.
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LP5951 SNVS345F – JUNE 2006 – REVISED MAY 2013 www.ti.com APPLICATION HINTS POWER DISSIPATION AND DEVICE OPERATION The permissible power dissipation for any package is a measure of the capability of the device to pass heat from the power source, the junctions of the IC, to the ultimate heat sink, the ambient environment. Thus the power dissipation is dependent on the ambient temperature and the thermal resistance across the various interfaces between the die and ambient air.
PAGE 9
LP5951 www.ti.com SNVS345F – JUNE 2006 – REVISED MAY 2013 CAPACITOR CHARACTERISTICS The LP5951 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 1µF to 4.7µF, ceramic capacitors are the smallest, least expensive and have the lowest ESR values, thus making them best for eliminating high frequency noise.
PAGE 10
LP5951 SNVS345F – JUNE 2006 – REVISED MAY 2013 www.ti.com NO-LOAD STABILITY The LP5951 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. ENABLE OPERATION The LP5951 may be switched ON or OFF by a logic input at the Enable pin, VEN. A logic high at this pin will turn the device on. When the enable pin is low, the regulator output is off and the device typically consumes 5nA.
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LP5951 www.ti.com SNVS345F – JUNE 2006 – REVISED MAY 2013 SUGGESTED CAPACITORS AND THEIR SUPPLIERS Capacitance / µF Model Vendor Type Case Size / Inch (mm) 1.0 C1608X5R1A105K TDK Ceramic, X5R 0603 (1608) 1.
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LP5951 SNVS345F – JUNE 2006 – REVISED MAY 2013 www.ti.com REVISION HISTORY Changes from Revision E (April 2013) to Revision F • 12 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
PAGE 13
PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 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) LP5951MF-1.3/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LKRB LP5951MF-1.5/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LKAB LP5951MF-1.
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PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 1-Nov-2013 Status (1) LP5951MG-1.3/NOPB Package Type Package Pins Package Drawing Qty ACTIVE SC70 DCK 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 L23 (4/5) LP5951MG-1.5 NRND SC70 DCK 5 1000 TBD Call TI Call TI -40 to 125 L2B LP5951MG-1.
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PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 1-Nov-2013 Status (1) LP5951MGX-3.7/NOPB ACTIVE Package Type Package Pins Package Drawing Qty SC70 DCK 5 3000 Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM Op Temp (°C) Device Marking (4/5) L44 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
PAGE 16
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) LP5951MF-1.3/NOPB SOT-23 DBV 5 1000 178.0 8.4 LP5951MF-1.5/NOPB SOT-23 DBV 5 1000 178.0 LP5951MF-1.8/NOPB SOT-23 DBV 5 1000 178.0 LP5951MF-2.0/NOPB SOT-23 DBV 5 1000 LP5951MF-2.5/NOPB SOT-23 DBV 5 LP5951MF-2.8/NOPB SOT-23 DBV LP5951MF-3.
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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 LP5951MG-1.3/NOPB SC70 DCK 5 1000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 LP5951MG-1.5 SC70 DCK 5 1000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 LP5951MG-1.5/NOPB SC70 DCK 5 1000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 LP5951MG-1.8/NOPB SC70 DCK 5 1000 178.0 8.4 2.25 2.45 1.2 4.
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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) LP5951MF-1.3/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP5951MF-1.5/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP5951MF-1.8/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP5951MF-2.0/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP5951MF-2.5/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP5951MF-2.
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