TPS5602

DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER

SLVS217 – JUNE 1999

3

POST OFFICE BOX 655303

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

COMP

12

I/O

Voltage monitor comparator input

CT

5

I/O

The oscillator frequency external capacitor connection

GND

7

Control GND

INV1

1

I

CH1 hysteretic comparator inverting input

INV2

15

I

CH2 hysteretic comparator inverting input

LH1

30

I/O

CH2 high-side gate drive boost capacitor input

LH2

16

I/O

CH1 high-side gate drive boost capacitor input

LL1

28

I/O

CH1 high-side drive and current protection

LL2

18

I/O

CH2 high-side drive and current protection

NC

2, 4, 6, 14

OUT1_d

27

I/O

CH1 low-side gate drive output

OUT2_d

19

O

CH2 low-side gate drive output

OUT1_u

29

O

CH1 high-side switch output

OUT2_u

17

O

CH2 high-side switch output

OUTGND1

26

Output GND 1

OUTGND2

20

Output GND 2

REF

8

O

1.185-V reference voltage output

REG5V_IN

21

I

External 5-V input

SOFTSTART1

3

I/O

CH1 soft start control external capacitor connection

SOFTSTART2

13

I/O

CH2 soft start control external capacitor connection

STBY1

9

I

CH1 standby control

STBY2

10

I

CH2 standby control

TRIP1

25

I

CH1 output current control input

TRIP2

23

I

CH2 output current control input

VCC

11

I

Supply voltage input

Vref5

22

O

5-V internal regulator output

VCCSENSE

24

I

Supply voltage sense input

detailed description

vref (1.185 V)

The reference voltage is used for the output voltage setting and the voltage protection (COMP).

vref (5 V)

An internal linear voltage regulator offers a fixed 5-V voltage as the bootstrap voltage so that the design for the

bootstrap is much easier. The tolerance is 6%. The extra current capability can also be used to power external

circuitry.

5-V switch

If the internal 5-V switch senses a 5-V input from REG5V pin, the internal 5-V linear regulator will be

disconnected from the MOSFET drivers. The external 5-V will be used for the low-side driver and the high-side

bootstrap, thus increasing the efficiency.