Datasheet

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