Description
, page 9)
2
FN9134.1
Block Diagram
SS1/EN1 SS2/EN2 SS3/EN3
VCC5 30 µA
VCC5 30 µA
VCC5 30 µA
3.3V
ISL6534
VCC
POWER ON
RESET AND CONTROL
VREF
VCC5 5.8V
REFERENCE 3.3V BIAS CURRENT
0.6V
3.3V
PGOOD = all 3 SS ramps done
with no COMP short
CLOCK AND SAWTOOTH GENERATOR
PGOOD
COMP1 FB1
REFIN
Features
- Two Synchronous-Rectified Buck Controllers - Voltage Mode control - VIN range up to 12V - VOUT range from 0.6V to 6V - 12V LGATE drivers; up to 12V Boot Strap for UGATE.
- Switcher References - 0.6V Reference for OUT1 (0.8% Accurate) - 3.3V Reference Output for OUT2 (0.8% Accurate) - External Reference Input for OUT2 - Buffered VTT Reference Output.
- Switcher clocking - Phase options for Optimal Clock Relationship - Resistor-Selectable Switching Frequency (300kHz default.
ISL6534 Datasheet
