HIP6004B

FN4567 Rev 3.00

Page 8 of 15

November 9, 2004

Figure 5 shows the critical power components of the converter. To

minimize the voltage overshoot the interconnecting wires

indicated by heavy lines should be part of ground or power plane

in a printed circuit board. The components shown in Figure 5

should be located as close together as possible. Please note that

capacitors. Locate the HIP6004B within 3 inches of the

and source connections from the HIP6004B must be sized to

handle up to 1A peak current.

Figure 6 shows the circuit traces that require additional layout

consideration. Use single point and ground plane construction

for the circuits shown. Minimize any leakage current paths on

because the internal current source is only 10µA. Provide local

PHASE pins.

Feedback Compensation

Figure 7 highlights the voltage-mode control loop for a

synchronous-rectified buck converter. The output voltage

oscillator (OSC) triangular wave to provide a pulse-width

PHASE node.

TABLE 1. OUTPUT VOLTAGE PROGRAM

PIN NAME

NOMINAL OUTPUT

VOLTAGE DACOUT

PIN NAME

NOMINAL OUTPUT

VOLTAGE DACOUT

VID4

VID3

VID2

VID1

VID0

VID4

VID3

VID2

VID1

VID0

01

111

1.30

1

111

1

0

01

110

1.35

1

111

0

2.1

01

101

1.40

1

110

1

2.2

01

100

1.45

1

110

0

2.3

01

011

1.50

1

101

1

2.4

01

010

1.55

1

101

0

2.5

01

001

1.60

1

100

1

2.6

01

000

1.65

1

100

0

2.7

00

111

1.70

1

011

1

2.8

00

110

1.75

1

011

0

2.9

00

101

1.80

1

010

1

3.0

00

100

1.85

1

010

0

3.1

00

011

1.90

1

001

1

3.2

00

010

1.95

1

001

0

3.3

00

001

2.00

1

000

1

3.4

00

000

2.05

1

000

0

3.5

PGND

LGATE

UGATE

PHASE

RETURN

HIP6004B

FIGURE 5. PRINTED CIRCUIT BOARD POWER AND

GROUND PLANES OR ISLANDS

FIGURE 6. PRINTED CIRCUIT BOARD SMALL SIGNAL

LAYOUT GUIDELINES

+12V

HIP6004B

SS

GND

BOOT

PHASE

HIP6004B