MAX38913, MAX38914

4µVRMS Ultra-Low-Noise 1A LDO with Two-

Level Output Voltage Selection

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Analog Devices | 4

Electrical Characteristics

(VIN = 3.6V, VOUT = 3.3V, VOUTS = VOUT, TJ = -40°C to +125°C, CBYP = 10nF, CIN = 10µF, COUT = 10µF, VEN1 = VEN2 = 3.6V,

Typical values are at TJ = +25°C, unless otherwise specified.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

VIN

Guaranteed by output accuracy

1.8

5.5

V

Input Undervoltage

Lockout

VIN_UVLO

VIN rising, 50mV hysteresis

1.7

1.75

1.8

V

Output Voltage Range

VOUT

Guaranteed by output accuracy

0.6

5

V

Output Capacitance

COUT

Necessary for loop stability

4

10

µF

Shutdown Supply

Current

IIN_SD

VEN1 = VEN2 = 0V

TJ = +25C

0.2

1

µA

TJ = +125C

1.2

Current Limit

ILIM

VOUTS = 0V, VIN - VOUT = 500mV

1.15

1.4

1.65

A

Current-Limit Response

Time

tILIM

3

µs

BYP Capacitor Range

CBYP

Necessary for regulator to remain stable

10

100

nF

BYP Soft-Start Current

IBYP

From BYP to GND during startup,

VOUTS = 0V

40

50

60

µA

EN Input Threshold

VIH

VIN = 1.8V to 5.5V

VEN1, VEN2 rising

0.8

1.2

V

VIL

VIN = 1.8V to 5.5V

VEN1, VEN2 falling

0.4

0.7

EN Input Falling Edge

Delay

tEN_DELAY

From VEN1 or VEN2 falling to mode

change

1

2

4

µs

EN Input Leakage

Current

IEN_LK

VEN1 = VEN2 =

5.5V

TJ = +25°C

-1

0.001

1

µA

TJ = +125°C

0.01

Input Reverse Current

Threshold

IIN_RTH

VOUT = 3.6V, when VIN falls to 0V

400

mA

Thermal Shutdown

Threshold

TSD

TJ when output

turns off

TJ rising

165

°C

TJ when output

turns on

TJ falling

150

POK and PORB

Threshold

VOUT when POK

and PORB switch

VOUT rising

88

91

94

%

VOUT falling

88

POK and PORB Output

Voltage, Low

VOL

IPOK = IPORB =

1mA

IPOK = IPORB =

1mA

10

100

mV

POK and PORB

Leakage

IPOK_LK,

IPORB_LK

VPOK = VPORB =

5.5V

TJ = +25°C

-0.1

0.001

+0.1

µA

TJ = +125°C

0.01

RSEL Detection

Accuracy (MAX38913)

Use the nearest 1% resistor from

Table 1

-1

+1

%

RSEL Pin Capacitance

(MAX38913)

CIN_RSEL

When Hi-Z

2

pF

RSEL Acquisition Time

(MAX38913)

tRSEL_ACQ

From VIN > VIN_UVLO to RSEL capture

240

600

1320

µs

EN2 = LOW and EN1 = HIGH (MODE 1); EN2 = HIGH, EN1 = HIGH (MODE 2)

Supply Current

IQ

IOUT = 0mA

1.37

2

mA