Datasheet

TPS5602
DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER
SLVS217 – JUNE 1999
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME NO.
I/O
DESCRIPTION
COMP 12 I/O Voltage monitor comparator input
C
T
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
V
CC
11 I Supply voltage input
Vref5 22 O 5-V internal regulator output
V
CC
SENSE 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.