10

FN4324.2

December 27, 2004

HIP6012 DC-DC Converter Application Circuit

The figure below shows a DC-DC converter circuit for a

microprocessor application, originally designed to employ

the HIP6006 controller. Given the similarities between the

HIP6006 and HIP6012 controllers, the circuit can be

implemented using the HIP6012 controller without any

modifications. However, given the expanded reference

voltage tolerance range, the HIP6012-based converter may

require additional output capacitance. Detailed information

on the circuit, including a complete Bill-of-Materials and

circuit board description, can be found in application note

AN9722. See Intersil’s home page on the web:

www.intersil.com

HIP6012

RT

FB

COMP

SS

REF

-

+

GND

+

-

OSC

VCC

VIN

C1-3

L1

C6-9

0.1

µF

2x 1

µF

0.1

µF

1

µF

15K

1K

3x 680

µF

4x 1000

µF

UGATE

OCSET

PHASE

BOOT

SPARE

CR1

Q1

3.01K

1000pF

CR2

C13

R1

R3

R4

C15

R5

C14

C12

C17-18

C19

R6

C20

4148

U1

RTN

12VCC

14

2

10

9

8

7

4

5

1

3

SPARE

PGND

LGATE

12

11

PVCC

13

JP1

Q2

1206

1206

MBR

340

RTN

ENABLE

R2

1K

COMP

TP1

PHASE

TP2

6

R7

10K

MONITOR AND

PROTECTION

+

-

+

-

C16

0.01

µF

33pF

SPARE

Component Selection Notes:

C1-C3 -3 each 680

µF 25W VDC, Sanyo MV-GX or equivalent.

C6-C9 -4 each 1000

µF 6.3W VDC, Sanyo MV-GX or equivalent.

L1 -Core: Micrometals T50-52B; Winding: 10 Turns of 17AWG.

CR1 -1N4148 or equivalent.

CR2 -3A, 40V Schottky, Motorola MBR340 or equivalent.

Q1, Q2 -Intersil MOSFET; RFP25N05

FIGURE 11. DC-DC CONVERTER APPLICATION CIRCUIT

HIP6012