MAX796 Maxim, MAX796 Datasheet - Page 27

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

Figure 14. 2.9V Low-Dropout Linear Regulator with Fast Transient Response
Figure 15. Low-Noise Boost Converter for Cellular Phones
____________________________________________Application Circuits (continued)
2.5V TO 5.25V
100 F
V
IN
C1
______________________________________________________________________________________
0.33 F
1N4148
1N4148
(EXTERNAL)
4.7 F
Synchronous Rectifier for CPU Power
+3.3V
0.01 F
BST
VL
SKIP
REF
GND
33k
CSH
INPUT
4.5V
TO 30V
190kHz - 340kHz
100k, 1%
MAX797
0.033
1k
SYNC
V+
REF
(2.505V)
2N7002
STANDARD 3.3V
CSL
MAX797
CIRCUIT
Step-Down Controllers with
VL (5V)
SHDN
PGND
OPTIONAL SYNC AND LOW-VOLTAGE
START-UP CIRCUIT
DH
DL
V+
LX
FB
MAX473
16k, 1%
OUTPUT
1.5k
82pF
(CSL)
MAIN
3.3V
5 H
20pF
L1
Q1
Si9433DY
OR MMSF4P01
L1 = SUMIDA CDRH125, 5 H
D1 = MOTOROLA MBR130
C1 - C3 = AVX TPS 100 F, 10V
Q1 = SILICONIX Si9936 (BOTH SECTIONS)
10 F
OR MOTOROLA MMDF3N03L
SANYO OS-CON
Q1
0.1 F
+2.9V OUTPUT
MAIN OUTPUT
10 F
D1
AT 2A
+3.3V
100 F
C2
100 F
C3
100k
100k
+5V AT 1A
27