LP5951_14 Datasheet, PDF (1/26 Pages) Texas Instruments – Micropower, 150mA Low-Dropout CMOS Voltage Regulator

LP5951
www.ti.com
SNVS345E – JUNE 2006 – REVISED JANUARY 2011
LP5951 Micropower, 150mA Low-Dropout CMOS Voltage Regulator
Check for Samples: LP5951
FEATURES
1
•2 Excellent Line Transient Response: ±2mV typ.
• Excellent PSRR: -60dB at 1kHz typ.
• Low Quiescent Current of 29µA typ.
• 1.8 to 5.5V Input Voltage Range
• Small SC70-5 and SOT-23-5 Packages
• Fast Turn-on Time of 30µs typ.
• Typ. < 1nA Quiescent Current in Shutdown
• Guaranteed 150mA Output Current
• Output Voltage Range: 1.3V to 3.7V
• Logic Controlled Enable 0.4V/0.9V
• Good Load Transient Response of 50mVpp
typ.
• Thermal-overload and Short-circuit Protection
• -40°C to +125°C Junction Temperature Range
APPLICATIONS
• General Purpose
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.
The LP5951 is designed to be stable with small 1µF ceramic capacitors.
The LP5951 also features internal protection against short-circuit currents and over-temperature conditions.
Performance is specified for a -40°C to 125°C temperature range.
The device is available in SOT-23-5 and SC70-5 package.
The device is available in fixed output voltages in the range of 1.3V to 3.7V. For availability, please contact your
local TI sales office.
Typical Application Circuit
V_IN
1 PF
Enable Control,
active high
LP5951
1 _VIN
V_OUT ⁵
3
V_EN
NC ⁴
GND
2
1 PF
Load
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
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 © 2006–2011, Texas Instruments Incorporated