MAX38909 datasheet(8/20 Pages) MAXIM

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Electrical Characteristics (continued)

(VIN = 1.5V, VOUT = 1.0V, VBIAS = 10V, TJ = -40°C to +125°C, CIN = 22μF, COUT = 22μF, CBYP = 1nF, unless noted otherwise.)

(Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output Noise

IOUT = 0.5A, 10Hz

to 100kHz, VOUT =

1.2V

CBYP = 47nF

21.2

μVRMS

IN Power Supply

Rejection Ratio

PSRR

VIN - VOUT = 0.3V,

IOUT = 1A, COUT =

4 x 10μF, CBYP =

47nF, VBIAS >

2.7V, VBIAS =

VOUT + 2V, TA =

+25°C

f = 1kHz

f = 10kHz

f = 100kHz

BIAS Supply Rejection

Ratio

PSRR

VIN - VOUT = 0.3V,

IOUT = 1A, COUT =

4 x 10μF, CBYP =

47nF, VBIAS =

VOUT + 5V, TA =

+25°C

f = 1kHz

f = 10kHz

f = 100kHz

BYP Capacitor Range

CBYP

Regulator remains stable; guaranteed by

design

0.001

0.1

μF

BYP Soft-Start Current

IBYP

From BYP to GND during startup

μA

EN Input Threshold

VIH

EN rising

1.0

1.6

VIL

EN falling

0.4

0.9

EN Input Leakage

Current

IEN_LK

VEN from 0V to

5.5V, VBIAS from

8V to 20V

TA = +25°C

-1

+0.001

μA

TJ = +125°C

0.01

POK Threshold

VOUT when POK

switches

VOUT rising

VOUT falling

POK Voltage, Low

VOL

IPOK = 1mA

100

POK Leakage Current

IPOK_LK

VPOK = 5.5V

TA = +25°C

-1

+0.001

μA

TJ = +125°C

0.01

IN Reverse-Current

Threshold

VOUT = 1.2V, VBIAS = 10V

700

Thermal Shutdown

Threshold

TJ when output

turns on/off

TJ rising

165

°C

TJ when output

turns on/off

TJ falling

150

Note 1: Limits over the specified operating temperature and supply voltage range are guaranteed by design and characterization, and

production tested at room temperature only.

Note 2: Dropout voltage is defined as (VIN - VOUT) when VOUT is 95% of its nominal value.

MAX38909

2A High-Performance

nMOS LDO Linear Regulator

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