TSM115

Pin Description

2/17

1

Pin Description

ABSOLUTE MAXIMUM RATINGS

OPERATING CONDITIONS

Name

Pin #

Type

Function

Fault

1

Open collector

Fault output. Output of the over voltage and under voltage comparators.

Gnd

2

Power supply

Signal ground and silicon substrate

PG

4

Open collector

Output of the Tpg comparator. This pin goes low upon an under voltage

condition. Except for the delay set by the Tpg capacitor this pin always

reflects the actual state of the under voltage sensing comparators output.

Tuv/Tpg

5

Timing capacitor

A capacitor from this pin to Gnd provides a delay between outputs rail volt-

age within regulation and PG output going high. Capacitor discharges

whenever Bsense low or Rem high or UVP is detected.

This capacitor will also provide the under voltage blanking function when

the voltage at this pin is larger than the Vref voltage. The under voltage

function resume.

Rem

6

Control Input pin

Pulling this pin high will send the Fault pin high latching off the power sup-

ply, reset the internal latch, discharge the start-up timing capacitors, Tuv

and Tpg capacitors, allowing normal start up of the system. Pulling this pin

low will send the Fault pin low, initiating a normal start up function.

Trem/Tsur

7

Timing capacitor

A capacitor from this pin to Gnd will delay the Fault signal when the Rem

pin is used to shut down the power supply. The PG will signal a power fail-

ure warming immediately, but the Fault pin shut down of the power will be

delayed. This capacitor will also provide the overcurrent blanking function

(surge current).

Bsense

9

Control input pin

Non inverting input to the Bsense voltage sensing comparator. Pulling this

pin lower than 2.5V will cause PG goes low and Tuv goes low.

Vs5

10

Analog input

Over voltage and under voltage detection for +5V rail

Is5

11

Analog Input

5V overcurrent control sense input.

Vs12a

12

Analog input

Over voltage and under voltage detection for +12V rail

Vs12b

13

Analog input

Over voltage and under voltage detection for +12V rail

Vs-12

14

Analog input

Over voltage and under voltage detection for -12V rail.

Is12

15

Analog Input

12V overcurrent control sense input.

Vs3.3

16

Analog input

Over voltage and under voltage detection for 3.3V rail.

Is3.3

17

Analog Input

3.3V overcurrent control sense input.

Rcrnt

19

Analog input

A resistor from this pin to Gnd will provide the internal constant current.

Vcc

20

Power supply

Supply input voltage

Symbol

DC Supply Voltage

Value

Unit

Vcc

-0.3 to 18

V

Vpmax

Terminal voltage Vs3.3, Is3.3, Vs12, Is12, Vs5, Is5

-0.3 to 18

V

Vnmax

Terminal voltage Vs-12

-15 to 5

V

VDBTT

VTpg/Tuv, VTrem/Tsur input voltage

-0.3 to 3.3V

V

VTER

Other terminals

-0.3 to Vcc

V

PT

Power dissipation

1

W

Tstg

Storage temperature

-55 to 150

°C

Tj

Junction temperature

150

°C

ESD

Electrostatic Discharge

2

kV

1) All voltage values, except differential voltage are with respect to network ground terminal.

Symbol

Parameter

Value

Unit

Vcc

DC Supply Conditions

3 to 15

V

Toper

Temperature range

0 to 95

°C