LDO51 datasheet(2/4 Pages) STMICROELECTRONICS

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LDO_51

2/4

ELECTRICAL CHARACTERISTICS

3V < VIN < 5.5V, -55°C < TA < +125°C, VREF = 2.8V, 0.8µF < COUT < 1.2µF, 20mΩ < ESR < 0.6Ω.

100

µA < I

LOAD < 80mA.

Typical case : VIN = 4V, T = 25°C, IOUT = 40mA.

Notes: 1. Above characteristics are given for 3V minimum input operating range voltage, but regulator is

operational with 2.7V minimum input voltage.

2. All parameters are guaranteed with 170mV Dropout voltage.

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Input Voltage Range (Note 1)

VIN

5,5

Output Voltage

VOUT

2,8

Output Voltage Accuracy

-3

Output current

IOUT

0,1

PMOS Output Resistance

RON

0,5

Ω

Dropout Voltage

∆V

OUT = 50mV,

ILOAD = 80mA

(Note 2)

170

Quiescent current

ILOAD = 100µA30

µA

ILOAD = 80mA

130

170

Power down mode

quiescent current

IQPDM

Power down active

100

Power Supply Rejection Ratio

PSRR

f < 10KHz

f < 100KHz

Line Regulation

Lir

ILOAD = 80mA,

VIN = 3V to 5.1V

Load Regulation

Ldr

Line Transient

Lirt

∆V

IN = 300mV

tRISE = tFALL = 10µs

1mV

Load Transient

Ldtr

10% to 90%

and 90% to 10%

of 80mA in 10

µs

1mV

Output Noise Voltage

100Hz

1,5

1KHz

550

100KHz

300

Output decoupling Capacitor

COUT

µF

Settling time

From power down to

active mode

µs

Short Circuit Current Limit

ISHORT

180

230

300

µV

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