7

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 HIP6004E within 3

MOSFETs’ gate and source connections from the HIP6004E

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

only 10

µA. Provide local V

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.

01

111

1.300

0

011

1

1.700

11

111

1.325

1

011

1

1.725

01

110

1.350

0

011

0

1.750

11

110

1.375

1

011

0

1.775

01

101

1.400

0

010

1

1.800

11

101

1.425

1

010

1

1.825

VID pins to HIGH.

TABLE 1. OUTPUT VOLTAGE PROGRAM (Continued)

PIN NAME

NOMINAL OUTPUT

VOLTAGE DACOUT

PIN NAME

NOMINAL OUTPUT

VOLTAGE DACOUT

VID25

mV

VID3

VID2

VID1

VID0

VID25

mV

VID3

VID2

VID1

VID0

PGND

LGATE

UGATE

PHASE

RETURN

HIP6004E

FIGURE 5. PRINTED CIRCUIT BOARD POWER AND

GROUND PLANES OR ISLANDS

FIGURE 6. PRINTED CIRCUIT BOARD SMALL SIGNAL

LAYOUT GUIDELINES

+12V

HIP6004E

SS

GND

VCC

BOOT

PHASE

HIP6004E