max5035ausat Maxim Integrated Products, Inc., max5035ausat Datasheet - Page 13

• Manufacturer Part Number: max5035ausat
• Description: Max5035 1a, 76v, High-efficiency Maxpower Step-down Dc-dc Converter
• Manufacturer: Maxim Integrated Products, Inc.

ground configuration). A ground plane is required.
Minimize lead lengths to reduce stray capacitance,
trace resistance, and radiated noise. In particular,
place the Schottky rectifier diode right next to the
Figure 2. Fixed Output Voltages
Table 2. Typical External Components Selection (Circuit of Figure 2)
7.5 to 76
7.5 to 76
7.5 to 76
7.5 to 76
15 to 76
V
IN
(V)
______________________________________________________________________________________
V
V
OUT
IN
3.3
3.3
12
5
5
R1
R2
(V)
1A, 76V, High-Efficiency MAXPower
C
I
IN
OUT
0.5
0.5
1
1
1
(A)
ON/OFF
V
SGND
IN
MAX5035
C
C
C
R1 = 1MΩ ±1%, 0805
R2 = 384kΩ ±1%, 0805
D1 = 50SQ100, IR
L1 = 100µH, Coilcraft Inc., DO5022P-104
C
C
C
R1 = 1MΩ ±1%, 0805
R2 = 384kΩ ±1%, 0805
D1 = 50SQ100, IR
L1 = 100µH, Coilcraft Inc., DO5022P-104
C
C
C
R1 = 1MΩ ±1%, 0805
R2 = 139kΩ ±1%, 0805
D1 = 50SQ100, IR
L1 = 220µH, Coilcraft Inc., DO5022P-224
GND
IN
OUT
BST
IN
OUT
BST
IN
OUT
BST
Step-Down DC-DC Converter
= 68µF, Panasonic, EEVFK2A680Q
= 68µF, Panasonic, EEVFK2A680Q
= 68µF, Panasonic, EEVFK2A680Q
= 0.1µF, 0805
= 0.1µF, 0805
= 0.1µF, 0805
BST
= 68µF, Vishay Sprague, 594D686X_010C2T
= 68µF, Vishay Sprague, 594D68X_010C2T
= 15µF, Vishay Sprague, 594D156X0025C2T
VD
LX
FB
device. Also, place BST and VD bypass capacitors
very close to the device. Use the PC board copper
plane connecting to V
0.1µF
0.1µF
D1
EXTERNAL COMPONENTS
L1
IN
Application Circuits
and LX for heatsinking.
C
OUT
V
OUT
13