ISL6431A Datasheet, PDF (9/10 Pages) Intersil Corporation – Advanced Pulse Width Modulation (PWM) Controller for Broadband Applications

ISL6431A
ISL6431A DC-DC Converter Application Circuit
Figure 8 shows an application circuit of a DC-DC Converter.
Detailed information on the circuit, including a complete Bill-
of-Materials and circuit board description, can be found in
Application Note AN9975.
+5V
6.19kΩ
10.0kΩ
8200pF
1.00kΩ
0.1µF
ISL6431A
VCC
5
+
C_IN
2 x 330µF
MONITOR
AND
PROTECTION
1 _BOOT
COMP/OCSET 7
REF
470pF
+_-
FB 6
U₁
OSC
+_-
3
GND
2 UGATE
8 PHASE
4 _LGATE
3.16kΩ
60.4Ω
18000pF
2 x 1µF
D₁
0.1µF
Q₁
L₁
V_OUT
Q₂
C_OUT ⁺
0.1µF
3 x 330µF
Component Selection Notes:
C_IN - Each 330mF 6.3WVDC, Sanyo 6TPB330M or Equivalent.
C_OUT - Each 330mF 6.3WVDC, Sanyo 6TPB330M or Equivalent.
D1 - 30mA Schottky Diode, MA732 or Equivalent
L₁ - 3.1µH Inductor, Panasonic P/N ETQ-P6F2ROLFA or Equivalent.
Q₁, Q₂ - Intersil MOSFET; HUF76143.
FIGURE 8. 5V to 3.3V 15A DC-DC CONVERTER
9