Datasheet > LP2951-50QDRQ1

LP2951-50QDRQ1

更新时间： 2024-11-27 01:12:39

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德州仪器 - TI		/
页数	文件大小	规格书
30页	3442K
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Adjustable Micropower Voltage Regulators With Shutdown

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LP2951-33-Q1, LP2951-50-Q1

SLVSAW6E –JUNE 2011–REVISED NOVEMBER 2014

LP2951-xx-Q1 Adjustable Micropower Voltage Regulators With Shutdown

1 Features

3 Description

The LP2951-xx-Q1 devices are bipolar, low-dropout

voltage regulators that can accommodate a wide

input supply-voltage range of up to 35 V. The 8-pin

LP2951-xx-Q1 is able to output either a fixed or

adjustable output from the same device. By tying the

OUTPUT and SENSE pins together, and the

FEEDBACK and V_TAPpins together, the LP2951-xx-

Q1 outputs a fixed 5 V and 3.3 V (depending on the

version). Alternatively, by leaving the SENSE and

V_TAPpins open and connecting FEEDBACK to an

external resistor divider, the output can be set to any

value between 1.235 V to 30 V.

•

Qualified for Automotive Applications

Wide Input Range: Up to 35 V

Rated Output Current of 100 mA

Low Dropout: 380 mV (Typ) at 100 mA

Low Quiescent Current: 75 μA (Typ)

Tight Line Regulation: 0.03% (Typ)

Tight Load Regulation: 0.04% (Typ)

High V_OAccuracy

•

–

1.4% at 25°C

2% Over Temperature

The 8-pin LP2951-xx-Q1 also offers additional

functionality that makes it particularly suitable for

battery-powered applications. For example, a logic-

compatible shutdown feature allows the regulator to

be put in standby mode for power savings. In

addition, there is a built-in supervisor reset function in

which the ERROR output goes low when V_OUTdrops

by 6% of its nominal value for whatever reasons –

due to a drop in V_IN, current limiting, or thermal

shutdown.

•

Can Be Used as a Regulator or Reference

Stable With Low ESR (>12 mΩ) Capacitors

Current- and Thermal-Limiting Features

8-Pin Package

–

Fixed Voltages: 5 V/ADJ and 3.3 V/ADJ

Low-Voltage Error Signal on Falling Output

Shutdown Capability

Remote Sense Capability for Optimal Output

Regulation and Accuracy

The LP295x-xx-Q1 devices are designed to minimize

all error contributions to the output voltage. With a

tight output tolerance (0.5% at 25°C), a very low

output voltage temperature coefficient (20 ppm

typical), extremely good line and load regulation

(0.3% and 0.4% typical), and remote sensing

capability, the parts can be used as either low-power

voltage references or 100-mA regulators.

2 Applications

•

Automotive Power

–

Battery to MCU Regulator

Sensor Supply

Infotainment

Device Information⁽¹⁾

Body Control Module

PART NUMBER

LP2951-33-Q1

LP2591-50-Q1

LP2951-50-Q1

PACKAGE

SOIC (8)

WSON (8)

BODY SIZE (NOM)

4.90 mm × 3.90 mm

3.00 mm × 3.00 mm

•

Secondary Side Regulation

Point of Load Regulation

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Dropout Voltage vs Temperature

500

450

400

350

300

250

200

150

100

= 100 mA

I_L

RI_LL= 100 µA

-40 -25 -10

20 35 50 65 80 95 110 125

T_A– Temperature – °C

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...30

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与LP2951-50QDRQ1相关器件

型号	品牌	获取价格	描述	数据表
LP2951A	SEMTECH	获取价格	150mA ADJUSTABLE VOLTAGE REGULATOR
LP2951A-3.3MDC	TI	获取价格	FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.6V DROPOUT, UUC, DIE
LP2951A-3.3MWC	TI	获取价格	FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.6V DROPOUT, UUC, WAFER
LP2951AC	ADMOS	获取价格	100mA LOW DROPOUT VOLTAGE REGULATOR
LP2951AC	CALOGIC	获取价格	100mA Low Dropout Voltage Regulators
LP2951ACD	ONSEMI	获取价格	Micropower Voltage Regulators
LP2951ACD3.0	ONSEMI	获取价格	100 mA, Low Power Low Dropout Voltage Regulator
LP2951ACD-3.0	ONSEMI	获取价格	Micropower Voltage Regulators
LP2951ACD-3.0G	ONSEMI	获取价格	100 mA, Low Power Low Dropout Voltage Regulator
LP2951ACD-3.0R2	MOTOROLA	获取价格	FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.45V DROPOUT, PDSO8, PLASTIC, SO-8

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