Data Sheet

LT4423

analog.com

Rev. 0

3 of 18

SPECIFICATIONS

Table 1. Electrical Characteristics

(Specifications are at TA = 25°C, IN = SHDN = 8.4V, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS/COMMENTS

MIN

TYP

MAX

UNITS

Operating Voltage Range

VIN

-40°C ≤ TJ ≤ 125°C

1.9

28

V

Quiescent Current in

Forward Regulation

ICC

IOUT = -10mA

Measured

Through GND

-40°C ≤ TJ ≤ 125°C

-10

-18

µA

Quiescent Current in

Shutdown

ISD

SHDN

= GND

Measured

Through GND

-40°C ≤ TJ ≤ 125°C

-0.1

-2

µA

Reverse Leakage Current

to IN

IREV(IN)

IN = GND, OUT =

28V, SHDN =

GND

-40°C ≤ TJ ≤ 125°C

-0.1

-0.5

µA

Reverse Leakage Current

to OUT

IREV(OUT)

IN = GND, OUT =

28V, SHDN =

GND

-40°C ≤ TJ ≤ 125°C

0.1

3

µA

Forward Regulation

Voltage (IN - OUT)

VREG

IOUT = -10mA

-40°C ≤ TJ ≤ 125°C

5

15

25

mV

Internal Path On-

Resistance

RON

IOUT = -1A

-40°C ≤ TJ ≤ 125°C

115

200

400

m

Reverse Turn-Off Time

tREV

Step OUT from

8.4V to 8.6V

STATUS Falling

-40°C ≤ TJ ≤ 125°C

15

25

µs

Response Time to Load

Step

tFON

Step IOUT from

–10mA to -1A

-40°C ≤ TJ ≤ 125°C

3

7

µs

SHDN

Rising Threshold

VSRT

-40°C ≤ TJ ≤ 125°C

1

1.3

1.6

V

SHDN

Hysteresis

VHYST

-40°C ≤ TJ ≤ 125°C

-75

-130

-230

mV

SHDN

Input Current

ISHDN

SHDN

= 28V

-40°C ≤ TJ ≤ 125°C

1

2

µA

SHDN

Delay to Power

Path Enable

tON

Step SHDN from

GND to IN

STATUS Released

-40°C ≤ TJ ≤ 125°C

570

1000

µs

SHDN

Delay to Power

Path Disable

tOFF

Step SHDN from

IN to GND

STATUS Falling

-40°C ≤ TJ ≤ 125°C

85

160

µs

STATUS Output Voltage

Low

VOL(STAT)

ISTATUS = 1mA,

SHDN

= GND

-40°C ≤ TJ ≤ 125°C

180

410

mV

STATUS Output High

Leakage

IOH(STAT)

STATUS = 28V

-40°C ≤ TJ ≤ 125°C

±5

±200

nA

Temperature when

Power Path Disabled4

TTSD

145

160

175

°C

.