FAN5250 Fairchild Semiconductor, FAN5250 Datasheet - Page 6

• Manufacturer Part Number: FAN5250
• Description: Mobile Processor Core-Voltage Regulator
• Manufacturer: Fairchild Semiconductor

FAN5250
Electrical Specifications
(VCC = 5V, VIN = 5V–24V, and T
unless otherwise noted)
6
13
16
14
Parameter
Soft Start current (I
ALTV Current Source
ALTV to VID mode threshold
PGOOD
VCORE Upper Threshold
VCORE Lower Threshold
PGOOD Output Low
Leakage Current
4
5
7
3
EN
FPWM
FREQ
VCORE+
SS
VIN
PGOOD
SS
Soft Start
DAC and
HYST
OSC
SS
CLK
)
EA
OVP
RAMP
S R
A
POR/UVLO
= recommended operating ambient temperature range using circuit of Figure 1,
Q
DTY CYC
(continued)
CLAMP
PWM
Figure 2. IC Block Diagram
Conditions
at start-up, V
at start-up, 1.75 > V
Rising Edge
Falling Edge
IPGOOD = 4mA
V
PULLUP
RAMP
Σ
= 5V
FPWM
HYST
PWM
CONTROL LOGIC
ILIM det.
I
CURRENT PROCESSING
OUT
VDD
SS
ADAPTIVE
PWM/HYST
GATE
< 0.5
5V
7
SS
MODE
> 0.5
S/H
15
VDD
R5
ILIM
Min.
1.71
350
123
9.5
20
77
87
18
19
20
21
4
5
BOOT
HDRV
SW
LDRV
PGND
ISNS
Typ.
1.75
500
0.5
26
10
Q1
Q2
R
SENSE
VIN
C
Max.
REV. 1.1.6 3/12/03
BOOT
10.5
1.78
650
127
32
81
94
1
L
OUT
V CORE
Units
% VID
% VID
% VID
C
µA
µA
µA
µA
V
V
OUT