FAN5078 查看數據表（PDF） - Fairchild Semiconductor
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FAN5078 Datasheet PDF : 16 Pages
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5VSB
VCC
D2
EN
POR/UVLO
S3#I
S3
VDDQ
OSC
CLK
FB
RAMP
Q
SR
OVP
ADAPTIVE
GATE
CONTROL LOGIC VDD
PWM
COMP
FB
PWM
RAMP
S/H
4.41K
ISNS
ILIM det.
SS
PGOOD
VDDQ IN
Reference and
Soft Start
VREF
CURRENT PROCESSING
Figure 2. PWM Modulator Block Diagram
BOOT
CBOOT
VIN
Q1
HDRV
SW
Q2
LDRV
PGND
VDDQ
L OUT
COUT
ISNS RSENSE
ILIM
RILIM
VDDQ IN
R9
REF IN
R10
VTT SNS
50K
EN
+
–
110K
S3#I
VDDQ IN
VTT OUT
PGND
Figure 3. VTT Regulator Block Diagram
© 2006 Fairchild Semiconductor Corporation
4
FAN5078 Rev. 1.0.0 • 05/11/06
www.fairchildsemi.com
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