ISL62875 Datasheet, PDF (6/22 Pages) Intersil Corporation – PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator

ISL62875
ISL62875 Functional Pin Descriptions (Continued)
PIN
NUMBER
14
15
16
17
18
19
20
SYMBOL
OCSET
NC
PHASE
UGATE
BOOT
VCC
PVCC
DESCRIPTION
Input for the overcurrent detection circuit. The overcurrent setpoint programming resistor
R_OCSET connects from this pin to the sense node.
No internal connection. Pin 15 should be connected to the GND pin.
Return current path for the UGATE high-side MOSFET driver. V_IN sense input for the R³
modulator. Inductor current polarity detector input. Connect to junction of output inductor,
high-side MOSFET, and low-side MOSFET. See Figures 1 and 2 on page 2.
High-side MOSFET gate driver output. Connect to the gate terminal of the high-side MOSFET
of the converter.
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.
Input for the IC bias voltage. Connect +5V to the VCC pin and decouple with at least a 1µF
MLCC to the GND pin. See “Application Schematics” (Figures 1 and 2) on page 2.
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 10µF MLCC to the PGND pin. See “Application Schematics” (Figures 1 and 2) on page 2.
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART MARKING
TEMP RANGE
(°C)
PACKAGE
(Pb-Free)
PKG. DWG. #
ISL62875HRUZ-T*
GAR
-10 to +100 20 Ld 3.2x1.8 µTQFN (Tape and Reel) L20.3.2x1.8
NOTES:
1. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach
materials and NiPdAu plate - e4 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free
soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL62875. For more information on MSL please
see techbrief TB363.
6
September 18, 2009
FN6905.1