hip6004e-isl16525evl Intersil Corporation, hip6004e-isl16525evl Datasheet - Page 4

• Manufacturer Part Number: hip6004e-isl16525evl
• Description: Buck And Synchronous-rectifier Pwm Controller And Output Voltage Monitor
• Manufacturer: Intersil Corporation

Typical Performance Curves
Functional Pin Descriptions
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 (R
upper MOSFET. R
(I
set the converter overcurrent (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 10µA current source, sets the soft-
start interval of the converter.
VID25mV-VID3 (Pins 4-8)
VID25mV - VID3 are the input pins to the 5-bit DAC. The
states of these five pins program the internal voltage
I
PEAK
OCSET
1000
100
10
10
=
), and the upper MOSFET on-resistance (r
FIGURE 1. R
I
---------------------------------------------------- -
OCSET
VID25mV
R
OCSET
r
T
COMP
TO +12V
DS ON
VSEN
PULLUP
VID0
VID1
VID2
VID3
x R
SS
FB
(
OCSET
SWITCHING FREQUENCY (kHz)
OCSET
T
10
OCSET
)
1
2
3
4
5
6
7
8
9
RESISTANCE vs FREQUENCY
, an internal 200µA current source
) from this pin to the drain of the
4
100
R
T
PULLDOWN TO V
20
19
18
17
16
15
14
13
12
11
RT
OVP
VCC
LGATE
PGND
BOOT
UGATE
PHASE
PGOOD
GND
SS
DS(ON)
1000
)
HIP6004E
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 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.
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 overcurrent 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.
80
70
60
50
40
30
20
10
FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY
0
100
C
UPPER
200
= C
300
SWITCHING FREQUENCY (kHz)
LOWER
400
= C
500
GATE
600
C
GATE
C
C
GATE
700
GATE
= 3300pF
= 10pF
= 1000pF
800
900
1000