MAX796 Maxim, MAX796 Datasheet - Page 28

• Manufacturer Part Number: MAX796
• Description: Step-Down Controllers with Synchronous Rectifier for CPU Power
• Manufacturer: Maxim

Step-Down Controllers with
Synchronous Rectifier for CPU Power
Figure 16. 5V-to-12V PWM Boost Converter
Figure 17. 90% Efficient, Low-Voltage PWM Flyback Converter (4 Cells to 5V)
28
____________________________________________Application Circuits (continued)
______________________________________________________________________________________
4.75V TO 6V
220 F
VIN
INPUT
3V TO 6.5V
C1
4.7 F
0.33 F
100 F
LOW IQ
4.7 F
HI EFF
BST
VL
SYNC
REF
GND
SKIP
CMPSH-3A
CSH
SKIP
BST
VL
MAX797
SYNC
0.01
CSH
0.33 F
SS
MAX797
0.01 F
33m
CSL
REF
PGND
SHDN
DH
LX
V+
FB
GND
CSL
SHDN
PGND
DH
DL
V+
LX
FB
5 H
L1
Q1, Q2 = Si9410DY
T1 = COILTRONIX CTX 10-4
START-UP SUPPLY VOLTAGE = 3.5V TYP
L1 = 2x SUMIDA CDRH125-100 IN PARALLEL
D1 = MOTOROLA MBR640
Q1 = MOTOROLA MTD20N03HDL
C1 = SANYO OS-CON 220 F, 10V
C2, C3 = SANYO OS-CON 150 F, 16V
10 H PRIMARY, 1:1
T1
Q1
Q1
D1
Q2
220 F
150 F
C2
220 F
150 F
C3
200k
200k
191k
49.9k
+5V AT 500mA
+12V AT 2A
OUTPUT