FAN5250QSC View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FAN5250QSC

Mobile Processor Core-Voltage Regulator

Fairchild Semiconductor 

FAN5250

Electrical Specifications (continued)

(VCC = 5V, VIN = 5V–24V, and TA = recommended operating ambient temperature range using circuit of Figure 1,

unless otherwise noted)

Parameter

Soft Start current (ISS)

ALTV Current Source

ALTV to VID mode threshold

PGOOD

VCORE Upper Threshold

VCORE Lower Threshold

PGOOD Output Low

Leakage Current

Conditions

at start-up, VSS < 0.5

at start-up, 1.75 > VSS > 0.5

Min.

20

350

9.5

1.71

Typ.

26

500

10

1.75

Max.

32

650

10.5

1.78

Units

µA

µA

µA

V

Falling Edge

Rising Edge

IPGOOD = 4mA

VPULLUP = 5V

123

127 % VID

77

81 % VID

87

94 % VID

0.5

V

1

µA

4 EN

POR/UVLO

5V

VDD

7

5 FPWM

SS

HYST

OVP

13 VIN

7 FREQ

OSC

CLK

RAMP

Q

SR

PWM

RAMP

EA

16 VCORE+

14 SS

3 PGOOD

DAC and

Soft Start

DTY CYC

CLAMP

Σ

FPWM

HYST

ADAPTIVE

GATE

VDD

CONTROL LOGIC

PWM

S/H

PWM/HYST

ILIM det. MODE

CURRENT PROCESSING

IOUT

15

ILIM

R5

18 BOOT

CBOOT

VIN

Q1

19 HDRV

20 SW

Q2

4 LDRV

5 PGND

V CORE

LOUT

COUT

RSENSE

21 ISNS

Figure 2. IC Block Diagram

6

REV. 1.1.6 3/12/03

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