LDO512 datasheet(2/6 Pages) STMICROELECTRONICS

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LDO_512

2/6

ELECTRICAL CHARACTERISTICS

3V < VIN < 5.5V, -30°C < TA < +85°C, VREF = 2.8V, 0.8µF < COUT < 1.2µF, 20mΩ < ESR < 0.6Ω.

100µA < ILOAD < 30mA.

Typical case : VIN = 4V, T = 25°C, IOUT = 15mA.

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 current

IOUT

PMOS Output Resistance

RON

0.4

Ω

Input Current

IIN

200

600

Dropout Voltage

∆V

ILOAD = 30mA,

∆V

OUT = 50mV

(Note 2)

170

Quiescent current

ILOAD = 100µA

100

150

µA

ILOAD = 30mA

150

280

Stand-by current

ISTDBY

ILOAD = 100µA

µA

Power down mode quiescent current

IPDN

Power down active

0.1

µA

Power Supply Rejection Ratio

PSRR

f < 100KHz

Power Supply Rejection Ratio in

stand-by mode

PSRRSTY f < 100kHz

Load Regulation

LDR

Line Regulation

LIR

ILOAD = 30mA,

VIN = 3V to 5.1V,

VOUT = 2.8V

0.5

Line Transcient

LIRT

VOUT = 2.8V,

IOUT = 30mA,

∆V

IN = 300mV

tRISE = tFALL = 10µs

0.5

1.5

Load Transcient

LDTR

VOUT = 2.8V,

tRISE = tFALL = 10µs

100µA < ILOAD < 30mA

3mV

Recovery time

µs

Output Voltage Noise

100Hz < f

≤ 1KHz

1KHz < f

≤ 100KHz

f > 100KHz

Output Decoupling Capacitor

COUT

1µF

Settling Time (from power down to active

mode)

VOUT = 2.8V,

COUT = 1µF

µs

Short Circuit Current Limit

ISHORT

200

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