ISL6218_14 Datasheet, PDF (6/19 Pages) Intersil Corporation – Precision Single-Phase Buck PWM Controller for Intel Mobile Voltage Positioning IMVP-IV and IMVP-IV+

ISL6218
VID0, VID1, VID2, VID3, VID4, VID5
These pins are used as inputs to the 6-bit Digital-to-Analog
converter (DAC). VID0 is the least significant bit and VID5 is
the most significant bit.
UG
This pin is the gate drive output to the high side MOSFETs.
LG
This pin is the gate drive output to the low side MOSFETs.
BOOT
This pin is connected to the Bootstrap capacitor for upper
gate drive.
PHASE
This pin is connected to the phase node of the power
channel.
+5VDC
+5VDC
VSSP
This pin is the return for the lower gate drive and is
connected to power ground.
VSS
This pin provides connection for signal ground.
Typical Application
Figure 1 shows a Single-Phase Synchronous Buck
Converter circuit used to provide “CORE” voltage regulation
for the Intel Pentium-M mobile processor using IMVP-IV^™
voltage positioning.
The circuit shows pin connections for the ISL6218 PWM
controller in the 38 Ld TSSOP package.
V _BATTERY
VR_ON
DPRSLPVR
STP_CPU
VID
PWRGD
VDD
VBAT
DACOUT
ISEN
DSV
PHASE
FSET
UG
NC
BOOT
EN
VSSP
DRSEN
LG
DSEN
VDDP
VID0
NC
VID1
VID2
ISL6218
TSSOP
NC
NC
VID3
NC
VID4
NC
VID5
NC
PGOOD
VSEN
EA+
DRSV
COMP
STV
FB
OCSET
SOFT
VSS
+VCC_CORE
FIGURE 1. TYPICAL APPLICATION CIRCUIT FOR ISL6218 SINGLE-PHASE PWM CONTROLLER
6
FN9101.6
August 6, 2007