MAX8553 Maxim, MAX8553 Datasheet - Page 14

• Manufacturer Part Number: MAX8553
• Description: 4.5V to 28V Input / Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load Applications
• Manufacturer: Maxim

4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
Figure
Figure
14
______________________________________________________________________________________
2. Typical Application Circuit 2: 2.5V Input, 1.25V VTT at Up to 8A, and 1.25V VTTR at Up to 25mA with 550kHz Switching
1. Typical Application Circuit 1: 12V Input, 2.5V Output at Up to 20A with 200kHz Switching Frequency
SDN
OFF
100kΩ
POK
R5
ON
20kΩ
25.5kΩ
R1
R4
110kΩ
0.22µF
REFIN
10V
VL
V+
C7
POK
R5
Q3
2N7002K
0.47µF
20Ω
R8
25V
C9
6V TO 28V
POK
V+
EN
HSD
REF
ILIM
GND
20kΩ
143kΩ
MAX8554
R3
54.9kΩ
R1
FSEL
0.22µF
R6
10V
C8
C11
1µF
PGND
OUT
BST
DH
DL
VL
LX
FB
POK
V+
REFIN
EN/HSD
REF
ILIM
FSEL
GND
CMPSH-3
TO V
MAX8553
5.1kΩ
OUT
R2
D1
PGND
VTTR
BST
VTT
DH
C4
0.47µF
10V
DL
VL
LX
CMPSH-3
VL
C3
4.7µF
6.3V
D1
Q2
2xIRF7832
Q1
IRF7832
C4
0.47µF
6.3V
C7
1µF
6.3V
C3
4.7µF
6.3V
R6
1Ω
Q1
IRF7821
C8
4700pF
OPTIONAL
Q2
IRF7821
1.0µH
Typical Application Circuits
30A
L1
R7
3Ω
C10
2200µF
0.68µH
L1
9A
R2
19.1kΩ
R3
6.04kΩ
C2
2x470µF
16V
0.002Ω
R4
C6
3x470µF
4V
C2
2x330µF
6V
C5
10µF
6.3V
2.5V AT
12V
20A
1.25V AT
C1
10µF
16V
C5
10µF
6.3V
2.5V
8A
VOUT
PGND
VIN
C1
10µF
6.3V
C6
4x470µF
2V
VOUT
PGND
VTTR
VIN