8

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.

numerous physical capacitors. Locate the HIP6004B within 3

MOSFETs’ gate 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

close to the SS pin because the internal current source is

practical to the BOOT and PHASE pins.

Feedback Compensation

Figure 7 highlights the voltage-mode control loop for a

synchronous-rectified buck converter. The output voltage

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

the 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