FAN5092MTC Datasheet, PDF (3/20 Pages) Fairchild Semiconductor – High Current System Voltage Buck Converter

PRODUCT SPECIFICATION
FAN5092
Pin Definitions (continued)
Pin Number
Pin Name
19
GNDA
20
LDRVA
21
VCC
22
PWRGD
23
PHASE
24
ISHR
25
DROOP/E*
26
ENABLE/SS
27
RT
28
VFB
Pin Function Description
Ground A. Ground-side current sense pin. Connect directly to low-side
MOSFET source, or to sense resistor ground.
Low Side FET Driver for A. Connect this pin to the gate of an N-channel
MOSFET for synchronous operation. The trace from this pin to the MOSFET
gate should be <0.5”.
VCC. Internal IC supply. Connect to system 12V supply, and decouple with a
0.1µF ceramic capacitor.
Power Good Flag. An open collector output that will be logic LOW if the
output voltage is not within +11/–12% of the nominal output voltage setpoint.
Phase Control. Connecting this pin to bypass causes a synchronized clock
signal to appear on CLK. Connecting this pin to ground allows the CLK pin to
accept a clock signal for synchronization.
Current Share. Connecting this pin to the ISHR pin of another FAN5092
enables current sharing.
Droop Control/E*-mode Control. A resistor from this pin to ground sets the
amount of droop by controlling the gain of the current sense amplifier.
Connecting this pin to bypass turns off Phase A.
Output Enable. A logic LOW on this pin will disable the output. An internal
current source allows for open collector control. This pin also doubles as soft
start.
Frequency Set. A resistor from this pin to ground sets the switching
frequency. See Apps section.
Voltage Feedback. Connect to the desired regulation point at the output of
the converter.
Absolute Maximum Ratings
Parameter
Supply Voltage VCC
Supply Voltages BOOTA, BOOTB
Voltage Identification Code Inputs, VID0-VID4
VFB, ENABLE/SS, PHASE, CLK
PWRGD
SW, ISNS
PGNDA, PGNDB to AGND
Gate Drive Current, peak pulse
Junction Temperature, TJ
Storage Temperature
Lead Soldering Temperature, 10 seconds
Thermal Resistance Junction-to-case, ΘJC
Min.
-3
-0.5
-55
-65
Typ.
300
16
Max.
15
22
6
6
15
15
0.5
3
150
150
Units
V
V
V
V
V
V
V
A
°C
°C
°C
°C/W
REV. 1.0.7 6/20/02
3