ISL6267 Datasheet, PDF (9/33 Pages) Intersil Corporation – Multiphase PWM Regulator for AMD Fusion Mobile CPUs

ISL6267
Pin Descriptions (Continued)
PIN NUMBER
40
41
42
43
44
45
46
47
48
SYMBOL
BOOT1_NB
PROG2
NTC_NB
ISUMN_NB
ISUMP_NB
RTN_NB
VSEN_NB
ISEN2_NB
ISEN1_NB
GND (Bottom Pad)
DESCRIPTION
Connect an MLCC capacitor across the BOOT1_NB and the PH1_NB pins. The boot capacitor is charged
through an internal boot diode connected from the VCCP pin to the BOOT1_NB pin, each time the
PH1_NB pin drops below VCCP minus the voltage dropped across the internal boot diode.
Program pin for setting output voltage offset for Northbridge VR.
Thermistor input to VR_HOT circuit to monitor Northbridge VR temperature.
Inverting input of the transconductance amplifier for current monitor and load line of the Northbridge VR.
Non-inverting input of the transconductance amplifier for current monitor and load line of the
Northbridge VR.
Output voltage sense return pin for the Northbridge controller. Connect to the -sense pin of the
microprocessor die.
Output voltage sense pin for the Northbridge controller. Connect to the +sense pin of the microprocessor
die.
Individual current sensing for Channel 2 of the Northbridge VR. When ISEN2 is pulled to 5V VDD, the
controller will disable Channel 2 and the Northbridge VR will run single-phase.
Individual current sensing for Channel 1 of the Northbridge VR.
Signal common of the IC. Unless otherwise stated, signals are referenced to the GND pin.
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP.
RANGE (°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL6267HRZ
ISL6267 HRZ
-10 to +100
48 Ld 6x6 QFN
L48.6x6B
ISL6267EVAL1Z
Evaluation Board
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are 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 ISL6267. For more information on MSL please see tech brief TB363.
9
January 31, 2011
FN7801.0