HIP6005BCB Intersil Corporation, HIP6005BCB Datasheet - Page 4

• Manufacturer Part Number: HIP6005BCB
• Description: Buck Pulse-Width Modulator (PWM) Controller and Output Voltage Monitor
• Manufacturer: Intersil Corporation

Typical Performance Curves
Functional Pin Description
VSEN (Pin 1)
This pin is connected to the converters 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 (R
upper MOSFET. R
(I
the converter over-current (OC) trip point according to the
following equation:
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 10 A current source, sets the
soft-start interval of the converter.
I
PEAK
OCS
1000
100
10
), and the upper MOSFET on-resistance (r
=
10
FIGURE 1. R
I
---------------------------------------------------- -
OCSET
OCSET
r
COMP
R
DS ON
VSEN
TO +12V
T
VID0
VID1
VID2
VID3
VID4
x R
PULLUP
SS
FB
OCSET
SWITCHING FREQUENCY (kHz)
OCSET
T
10
OCSET
1
2
3
4
5
6
7
8
9
RESISTANCE vs FREQUENCY
, an internal 200 A current source
2-113
) from this pin to the drain of the
100
R
T
PULLDOWN TO V
20
19
18
17
16
15
14
13
12
11
RT
OVP
VCC
NC
NC
BOOT
UGATE
PHASE
PGOOD
GND
DS(ON)
SS
) set
1000
HIP6005B
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
(DACOUT). The level of DACOUT sets the converter output
voltage. It also sets the PGOOD and OVP thresholds. Table
1 specifies DACOUT for the 32 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.
40
35
30
25
20
15
10
FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY
5
0
100
200
300
SWITCHING FREQUENCY (kHz)
400
C
UGATE
500
= 3300pF
C
UGATE
600
C
= 1000pF
700
UGATE
800
= 10pF
900
1000