FAN5232 View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
FAN5232 Datasheet PDF : 9 Pages
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FAN5232
Pin Assignments
VBATT
1
3V_ALWAYS
2
5V_ALWAYS
3
AGND
4
SDWN
5
SDNADJ
6
PWRGD
7
PRODUCT SPECIFICATION
14
CPUMP
13
HSD
12
ISNS
11
SW
10
LSD
9
PGND
8
VFB
Pin Description
Pin Number
1
2
Pin Name
VBATT
3V_ALWAYS
3
5V_ALWAYS
4
AGND
5
SDWN
6
SDNADJ
7
PWRGD
8
VFBSW
9
PGND
10
LSD
11
SW
12
ISNS
13
HSD
14
CPUMP
Pin Function Description
Battery Voltage. Battery voltage sensor.
3.3V-ALWAYS Linear Regulator. Total load current on pins 2 and 3 together
must not exceed 50mA.
5V-ALWAYS Linear Regulator. Total load current on pins 2 and 3 together
must not exceed 50mA.
Analog Ground.
IC Shutdown. Puts entire chip into shutdown. OFF=0. ON=1.
Shutdown and Softstart for the Switcher. OFF=0. ON=1.
Switcher Output OK. An open collector output that will be low if the switcher
output is out of spec.
Voltage Feedback for the Switcher.
Ground for the Switcher. Connect by the shortest possible path to the source
of the low side MOSFET.
Low Side FET Driver for the Switcher. Connect this pin through a resistor to
the gate of an N-channel MOSFET.
High Side FET Source and Low Side FET Drain Switching Node.
Current Feedback for the Switcher. Connect by the shortest possible path to
a resistor connected to the drain of the low side MOSFET.
High Side FET Driver for the Switcher. Connect this pin through a resistor to
the gate of an N-channel MOSFET.
Charge Pump for the Switcher. Generates gate drive voltage for the high-side
MOSFET.
Absolute Maximum Ratings1
Parameter
VBATT Pin
PHASE, IFB, SDWN Pins
CPUMP, HSD Pins
All Other Pins
Thermal Resistance, θJ-A
θJ-C
Junction Temperature
Storage Temperature
Lead Temperature, Soldering 10 sec.
Conditions
Min.
-0.3
-5
-0.3
-0.3
-65
Typ.
100
32
Max.
29
29
34
6.5
150
150
300
Units
V
V
V
V
°C/W
°C/W
°C
°C
°C
Note:
1. Functional operation under any of these conditions is NOT implied. Performance and reliability are guaranteed only if
Operating Conditions are not exceeded.
2
REV. 1.1.1 10/7/02
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