TPS2398, TPS2399

www.onsemi.com

2

Figure 2. Internal Block Diagram

10 uA

0.6 uA

0.5 V

4.5 V

40mV

EN

OL

Slow/Fast

RampHi

100mV

4us

Overload

comparator

Linear current

amplifier (LCA)

Enabled

4

IRAMP

7

GATE

6

ISNS

Enabled

Q

Q

SET

CLR

S

R

GateHi

RampHi

GateHi

7.5V

1

5

−VIN

Priority: R

Fault

OC

Overcurrent

comparator

OL

99 R

R

Enabled

Fault

4.0 V

0.5 V

Q

Q

SET

CLR

S

R

50 uA

0.4 uA

Fault

3

FLTTIME

TPS2398 − Log0

TPS2399 − Log1

30 V

8

RTN

1.4 V

2

EN

Enabled

Fault

OC

Slow/Fast

Enabled

REG

VDDs

Enabled

PG

47 nF

3.9 nF

0.02

W

100

mF

100 V

−48V

RTN

−48V

IN

NTD6414

VOUT+

VOUT−

100 k

W

RSE

RSE

Logic

Logic

Logic

Table 1. PIN FUNCTION DESCRIPTION

Pin Number

Pin Name

Description

2

EN

Enable input to turn on/off power to the load

1

PG

Open−drain, active−low indication of a load power good condition.

3

FLTTIME

Connection for user−programming of the fault timeout period.

7

GATE

Gate drive for external N−channel FET

4

IRAMP

Programming input for setting the inrush current slew rate.

6

ISENS

Current sense input.

8

RTN

Positive supply input for the TPS2398 and TPS2399.

5

−VIN

Negative supply input and reference pin for the TPS2398 and TPS2399.