ISL95876HRZ-T View Datasheet(PDF) - Intersil
Part Name
Description
MFG CO.
ISL95876HRZ-T Datasheet PDF : 29 Pages
| |||
ISL95874, ISL95875, ISL95876
ISL95876 Functional Pin Descriptions
PIN NUMBER
1
2
3
4
5, 6, 7
8
9
10
11
12
13
14
15
16
17
18
19
20
Bottom Pad
SYMBOL
DESCRIPTION
RTN
VID1
Negative remote sense input of VOUT. If resistor divider consisting of RFB and ROFS is used at FB pin, the same
resistor divider should be used at RTN pin, i.e. keep RFB1=RFB, and ROFS1=ROFS.
Logic input for setpoint voltage selector. Use in conjunction with the VID0 pin to select among four setpoint reference
voltages.
VID0
Logic input for setpoint voltage selector. Use in conjunction with the VID1 pin to select among four setpoint reference
voltages.
SREF
SET0, SET1,
SET2
Soft-start and voltage slew-rate programming capacitor input and setpoint reference voltage programming resistor
input. Connects internally to the inverting input of the VSET voltage setpoint amplifier.
Voltage set-point programming resistor input.
FB
Voltage feedback sense input. Connects internally to the inverting input of the control-loop error transconductance
amplifier. The converter is in regulation when the voltage at the FB pin equals the voltage on the SREF pin.
OCSET
VO
Input for the overcurrent detection circuit. The overcurrent setpoint programming resistor ROCSET connects from this
pin to the sense node.
Output voltage sense input for the R4 modulator. The VO pin also serves as the reference input for the overcurrent
detection circuit.
FSEL
Input for programming the regulator switching frequency. Pull this pin to VCC for 1MHz switching. Pull this pin to GND
with a 100kΩ resistor for 600kHz switching. Leave this pin floating for 500kHz switching. Pull this pin directly to GND
for 300kHz switching.
PGOOD
Power-good open-drain indicator output. This pin changes to high impedance when the converter is able to supply
regulated voltage.
EN
PHASE
Enable input for the IC. Pulling EN above the rising threshold voltage initializes the soft-start sequence.
Return current path for the UGATE high-side MOSFET driver, VIN sense input for the R4 modulator, and inductor
current polarity detector input.
UGATE High-side MOSFET gate driver output. Connect to the gate terminal of the high-side MOSFET of the converter.
BOOT
Positive input supply for the UGATE high-side MOSFET gate driver. The BOOT pin is internally connected to the
cathode of the Schottky boot-strap diode. Connect an MLCC between the BOOT pin and the PHASE pin.
VCC
Input for the IC bias voltage. Connect +5V to the VCC pin and decouple with at least a MLCC to the GND pin.
PVCC
Input for the LGATE and UGATE MOSFET driver circuits. The PVCC pin is internally connected to the anode of the
Schottky boot-strap diode. Connect +5V to the PVCC pin and decouple with a MLCC to the PGND pin.
LGATE Low-side MOSFET gate driver output. Connect to the gate terminal of the low-side MOSFET of the converter.
PGND Return current path for the LGATE MOSFET driver. Connect to the source of the low-side MOSFET.
GND
IC ground for bias supply and signal reference.
9
FN7933.0
October 21, 2011
Share Link: 