FAN5233 Просмотр технического описания (PDF) - Fairchild Semiconductor

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производитель

FAN5233

System Electronics Regulator for Mobile PCs

Fairchild Semiconductor 

FAN5233

PRODUCT SPECIFICATION

Operating Conditions (Continued)

Recommended Operating Conditions Unless Noted Refers to Block Diagrams

Parameter

Control Functions

SDWN Off Voltage Max.

SDWN On Voltage Min.

Over-temperature Shutdown, tj

Over-temperature Hysteresis

PGOOD Threshold

PGOOD Sink Current

PGOOD leakage

+5V Analog Softstart

+3.3V Analog Softstart

Soft Start Current

PGOOD Min Pulse Width

FPWM ON

Conditions

Min. Typ. Max. Units

800

mV

3

V

150

°C

25

°C

PWM Buck Converters

-14

-11

-8.5 %VO1

-4

mA

1

µA

Css=100nF

65

msec

Css=100nF

65

msec

5

µA

Note 2

5

10

µs

2.0

V

Notes

1. The minimum input voltage does not include voltage drop in the source supply due to source resistance. It is operating voltage

for static load conditions. To get acceptable load transient performance, the input voltage required will be much higher, in the

7.5 to 8.5 volt range or even higher depending on the severity of dynamic load, source impedance and input and output

capacitance and inductor values. The user should thoroughly test the performance at minimum input voltage using intended

component values and transient loading.

2. Min/Max specifications are guaranteed by design.

6

REV. 1.0.6 1/22/02

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