HIP6004DCB-T(2000) View Datasheet(PDF) - Intersil

Part Name

Description

Manufacturer

HIP6004DCB-T
(Rev.:2000)

Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor

Intersil 

HIP6004D

Typical Performance Curves

1000

100

RT PULLUP

TO +12V

10

RT PULLDOWN TO VSS

10

100

SWITCHING FREQUENCY (kHz)

FIGURE 1. RT RESISTANCE vs FREQUENCY

1000

Functional Pin Descriptions

VSEN 1

OCSET 2

SS 3

VID0 4

VID1 5

VID2 6

VID3 7

VID4 8

COMP 9

FB 10

20 RT

19 OVP

18 VCC

17 LGATE

16 PGND

15 BOOT

14 UGATE

13 PHASE

12 PGOOD

11 GND

VSEN (Pin 1)

This pin is connected to the converter’s output voltage. The

PGOOD and OVP comparator circuits use this signal to

report output voltage status and for overvoltage protection.

OCSET (Pin 2)

Connect a resistor (ROCSET) from this pin to the drain of the

upper MOSFET. ROCSET, an internal 200µA current source

(IOCS), and the upper MOSFET on-resistance (rDS(ON)) set

the converter over-current (OC) trip point according to the

following equation:

IPEAK = I--O-----C----S----E-r--D-T---S--x--(--O-R----N-O---)-C-----S----E---T--

An over-current trip cycles the soft-start function.

SS (Pin 3)

Connect a capacitor from this pin to ground. This capacitor,

along with an internal 10µA current source, sets the soft-

start interval of the converter.

VID0-4 (Pins 4-8)

VID0-4 are the input pins to the 5-bit DAC. The states of

these five pins program the internal voltage reference

80

70

CGATE = 3300pF

60

CUPPER = CLOWER = CGATE

50

40

CGATE = 1000pF

30

20

10

CGATE = 10pF

0

100 200 300 400 500 600 700 800 900 1000

SWITCHING FREQUENCY (kHz)

FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY

(DACOUT). The level of DACOUT sets the converter output

voltage. It also sets the PGOOD and OVP thresholds. Table

1 specifies DACOUT for the all combinations of DAC inputs.

COMP (Pin 9) and FB (Pin 10)

COMP and FB are the available external pins of the error

amplifier. The FB pin is the inverting input of the error

amplifier and the COMP pin is the error amplifier output.

These pins are used to compensate the voltage-control

feedback loop of the converter.

GND (Pin 11)

Signal ground for the IC. All voltage levels are measured with

respect to this pin.

PGOOD (Pin 12)

PGOOD is an open collector output used to indicate the

status of the converter output voltage. This pin is pulled low

when the converter output is not within ±10% of the

DACOUT reference voltage. Exception to this behavior is

the ‘11111’ VID pin combination which disables the

converter; in this case PGOOD asserts a high level.

PHASE (Pin 13)

Connect the PHASE pin to the upper MOSFET source. This

pin is used to monitor the voltage drop across the MOSFET

for over-current protection. This pin also provides the return

path for the upper gate drive.

UGATE (Pin 14)

Connect UGATE to the upper MOSFET gate. This pin

provides the gate drive for the upper MOSFET.

BOOT (Pin 15)

This pin provides bias voltage to the upper MOSFET driver.

A bootstrap circuit may be used to create a BOOT voltage

suitable to drive a standard N-Channel MOSFET.

4

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