0

50

100

150

200

250

300

350

400

450

500

-40 -25 -10

5

20

35

50

65

80

95 110 125

I

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

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

1

•

Qualified for Automotive Applications

voltage regulators that can accommodate a wide

•

Wide Input Range: Up to 35 V

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

•

Rated Output Current of 100 mA

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

adjustable output from the same device. By tying the

•

Low Dropout: 380 mV (Typ) at 100 mA

OUTPUT

and

SENSE

pins

together,

and

the

•

Low Quiescent Current: 75

μA (Typ)

•

Tight Line Regulation: 0.03% (Typ)

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

version). Alternatively, by leaving the SENSE and

•

Tight Load Regulation: 0.04% (Typ)

•

external resistor divider, the output can be set to any

–

1.4% at 25°C

value between 1.235 V to 30 V.

–

2% Over Temperature

The

8-pin

LP2951-xx-Q1

also

offers

additional

•

Can Be Used as a Regulator or Reference

functionality that makes it particularly suitable for

•

Stable With Low ESR (>12 m

Ω) Capacitors

battery-powered applications. For example, a logic-

compatible shutdown feature allows the regulator to

•

Current- and Thermal-Limiting Features

be put in standby mode for power savings. In

•

8-Pin Package

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

–

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

by 6% of its nominal value for whatever reasons –

–

Low-Voltage Error Signal on Falling Output

–

Shutdown Capability

shutdown.

–

Remote Sense Capability for Optimal Output

The LP295x-xx-Q1 devices are designed to minimize

Regulation and Accuracy

all error contributions to the output voltage. With a

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

2 Applications

output

voltage

temperature

coefficient

(20

ppm

•

Automotive Power

typical), extremely good line and load regulation

(0.3%

and

0.4%

typical),

and

remote

sensing

–

Battery to MCU Regulator

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

–

Sensor Supply

voltage references or 100-mA regulators.

–

Infotainment

Device Information(1)

–

Body Control Module

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Secondary Side Regulation

LP2951-33-Q1

•

Point of Load Regulation

SOIC (8)

4.90 mm × 3.90 mm

LP2591-50-Q1

LP2951-50-Q1

WSON (8)

3.00 mm × 3.00 mm

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

the end of the data sheet.

Dropout Voltage vs Temperature

1

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.