FAN5066 Fairchild Semiconductor, FAN5066 Datasheet - Page 12

• Manufacturer Part Number: FAN5066
• Description: Ultra Low Voltage Synchronous DC-DC Controller
• Manufacturer: Fairchild Semiconductor

FAN5066
Design Considerations and Component
Selection
MOSFET Selection
MOSFET Gate Bias
Method 1. Charge Pump (Bootstrap)
12
Method 2. 12V Gate Bias
PWM/PFM
PWM/PFM
Control
Control
Figure 4. Charge Pump Configuration
Figure 5. Gate Bias Configuration
+12V
VCCQP
VCCQP
GNDP
GNDP
LODRV
LODRV
HIDRV
HIDRV
47
1 F
CP
PRODUCT SPECIFICATION
D1
D1
Q1
Q2
Q2
Q1
REV. 2.1.4 11/13/01
L2
L2
D2
+5V
D2
RS
RS
+5V
C
C
OUT
OUT
VO
VO