LDO57 datasheet(2/4 Pages) STMICROELECTRONICS

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LDO_57

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ELECTRICAL CHARACTERISTICS

3V < VIN < 5.5V, -30°C < TA < +85°C, VREF = 2.8V, COUT = 4.7µF ±20%, 20mΩ < ESR < 0.6Ω,

ILOAD = 400mA.

Typical case : VIN = 4V, T = 25°C, COUT = 4.7µF, ILOAD = 400mA.

Notes: 1. Above characteristics are given for 2.9V minimum input operating range voltage, but regulator

is operational with 2.7V minimum input voltage.

2. All performances of the regulator are guarenteed for a voltage drop of 170mV minimum.

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Input Voltage Range (Note 1)

VIN

2,9

5,5

Output Voltage

VOUT

1,8

4,9

Output Voltage Accuracy

Output current

IOUT

400

Dropout Voltage

∆V

OUT = 50mV,

ILOAD = 400mA,

(Note 2)

170

Quiescent current

ILOAD = 100µA

100

150

µA

ILOAD = 40mA

150

230

ILOAD = 400mA

350

450

Power down mode quiescent current

IQPDM

Power down active

100

Power Supply Rejection Ratio

PSRR

f = 10KHz

Line Regulation

Lir

ILOAD = 400mA,

VIN = 2.9V to 5.5V

4mV

Load Regulation

Ldr

ILOAD = 100µA - 400mA

Line Transient

Lirt

∆V

IN = 300mV

tRISE = tFALL = 10µs

2,5

Load Transient

Ldtr

ILOAD = 100µA - 400mA

in 10

µs

Output Noise Voltage

100Hz

1,2

1KHz

400

10KHz

140

enRMS

BW : 100Hz to 100KHz

µV

RMS

Output decoupling Capacitor

COUT

4,7

µF

Settling time

From power down

to active mode

µs

Short Circuit Current Limit

ISHORT

µV

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