MAX1631AEAI+T Maxim Integrated Products, MAX1631AEAI+T Datasheet - Page 26
![IC PWR-SUPP CTRLR NOTEBK 28-SSOP](/photos/6/61/66141/175-28-ssop_sml.jpg)
MAX1631AEAI+T
Manufacturer Part Number
MAX1631AEAI+T
Description
IC PWR-SUPP CTRLR NOTEBK 28-SSOP
Manufacturer
Maxim Integrated Products
Type
Step-Down (Buck)r
Datasheet
1.MAX1634CAI.pdf
(29 pages)
Specifications of MAX1631AEAI+T
Internal Switch(s)
No
Synchronous Rectifier
Yes
Number Of Outputs
2
Voltage - Output
3.3V, 5V, Adj
Current - Output
4A
Frequency - Switching
200kHz, 300kHz
Voltage - Input
4.2 ~ 30 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-SSOP
Power - Output
762mW
Output Voltage
2.5 V to 5.5 V, 3.3 V, 5 V
Input Voltage
4.2 V to 30 V
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
_____________________________________________________________Application Circuits (continued)
Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
Figure 10. Dual, 4A, Notebook Computer Power Supply
26
2.5V OUTPUT
*
R1 = R2 = 15mΩ
L1 = L2 = 6.8μH SUMIDA CDRH 127-6R8MC
Q1 = Q4 = Si4410DY or 1RF7413
C1 = C2 = 2X SANYO OS-CON 10 SA220M
C3 = 4X SANYO OS-CON 30SC10M
*VL DIODES AND OUTPUT SCHOTTKY DIODES REQUIRED
______________________________________________________________________________________
FOR THE MAX1631 ONLY (SEE OUTPUT OVERVOLTAGE PROTECTION
AND OUTPUT UNDERVOLTAGE SHUTDOWN PROTECTION SECTIONS).
C1
+6V TO +24V
0Ω
OPEN
INPUT
R1
ON/OFF
ON/OFF
C3
0.1μF
L1
1N5819
Q1
4.7μF
10Ω
Q2
0.1μF
0.1μF
18
16
17
19
20
14
13
12
28
1μF
7
8
BST5
DH5
LX5
DL5
CSH5
CSL5
TIME/ON5
RUN/ON3
GND
V+ SHDN
PGND
FB5
REF
22
ON/OFF
9
MAX1631
MAX1634
23
SYNC
SECFB
6
RESET
STEER
5
CSH3
CSL3
BST3
SKIP
DH3
SEQ
FB3
LX3
DL3
*
VL
15
21
25
27
26
24
1
2
3
11
10
4
*
0.1μF
Q4
RESET OUTPUT
Q3
1N5819
0.1μF
4.7μF
5V ALWAYS ON
L2
OPEN
R2
0Ω
+3.3V OUTPUT
C2
*