FAN5078D3 查看數據表（PDF） - Fairchild Semiconductor
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FAN5078D3 Datasheet PDF : 18 Pages
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5VSB
VCC
D2
EN
POR/UVLO
S3#I
S3
VDDQ
COMP
FB
SS
PGOOD
VDDQ IN
OSC
CLK
FB
RAMP
Q
SR
PWM
OVP
ADAPTIVE
GATE
CONTROL LOGIC VDD
PWM
S/H
RAMP
4.41K
ISNS
Reference and
Soft Start
VREF
ILIM det.
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
© 2008 Fairchild Semiconductor Corporation
4
FAN5078D3 • Rev. 1.0.0
www.fairchildsemi.com
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