FAN5235 View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FAN5235

System Electronics Regulator for Mobile PCs

Fairchild Semiconductor 

FAN5235

Pin Description (Continued)

Pin Name

ISEN5

SW5

HSD5

CPUMP5

Pin Number Pin Function Description

21

Current Sense for 5V. This pin should be connected to the drain of the bottom

Mosfet using appropriate resistor and RC filter. See Application Section.

22

High Side Driver Source and Low Side Driver Drain Switching Node.

Switching node for 5V.

23

High side FET driver for 5V. Connect this pin directly to the gate of an N-channel

MOSFET. The trace from this pin to the MOSFET gate should be < 1".

24

Charge Pump 5V. High side Gate drive voltage for 5V. High side Gate drive

voltage for 5V. This pin is to be connected to SW5 through a 100nF cap. and to

5V-ALWAYS through a diode.

Absolute Maximum Ratings1

Parameter

Conditions

Min.

VIN

-0.3

SW, ISEN Pins,SDWN Pin

-0.3

CPUMP, HSD Pins

-0.3

SDN, VFB, V_always pins

-0.3

CPUMP to SW pins, and all other pins

-0.3

The sum of the load currents on pins 2 and 6 must not exceed 60mA total

Typ.

Max.

27

27

33

6.5

6.5

Units

V

V

V

V

V

Note:

1. Stresses beyond "Absolute Maximum Ratings" may cause permanent device damage. Continuous exposure to absolute

maximum rating conditions may affect device reliability. Functional operation of the device at these or any other conditions

beyond those indicated in the operational sections of the specification is not implied.

Recommended Operating Conditions

Input Voltage, VIN

Ambient Temperature, TA

+5.4V to 24V

-20°C to 85°C

Thermal Information

Thermal Resistance, θJA

Thermal Resistance, θJC

QSOP

TSSOP

Maximum Junction Temperature

Storage Temperature Range

Maximum Lead Temperature, Soldering 10 Sec

88°C/W

28.5°C/W

16°C/W

150°C

-65°C to 150°C

300°C

REV. 1.3.3 1/3/02

3

Share Link: