MAX797ESE/GG8 Maxim Integrated Products, MAX797ESE/GG8 Datasheet - Page 27

• Manufacturer Part Number: MAX797ESE/GG8
• Description: DC/DC Switching Converters Step-Down Controller for CPU Power
• Manufacturer: Maxim Integrated Products

Specifications of MAX797ESE/GG8

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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
100µF
V
IN
C1
______________________________________________________________________________________
0.33µF
1N4148
1N4148
(EXTERNAL)
4.7µF
Synchronous Rectifier for CPU Power
+3.3V
0.01µF
BST
VL
SKIP
REF
GND
33k
CSH
INPUT
4.5V
TO 30V
190kHz - 340kHz
100k, 1%
MAX797
0.033Ω
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
5µH
20pF
L1
Q1
Si9433DY
OR MMSF4P01
L1 = SUMIDA CDRH125, 5µH
D1 = MOTOROLA MBR130
C1 - C3 = AVX TPS 100µF, 10V
Q1 = SILICONIX Si9936 (BOTH SECTIONS)
10µF
OR MOTOROLA MMDF3N03L
SANYO OS-CON
Q1
0.1µF
+2.9V OUTPUT
MAIN OUTPUT
10µF
D1
AT 2A
+3.3V
100µF
C2
100µF
C3
100k
100k
+5V AT 1A
27