HIP6311A Datasheet, PDF (1/16 Pages) Intersil Corporation – Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller

®
Data Sheet
Microprocessor CORE Voltage Regulator
Multi-Phase Buck PWM Controller
The HIP6311A Multi-Phase Buck PWM control IC together
with HIP6601A, HIP6602A or HIP6603A companion gate
drivers form a precision voltage regulation system for
advanced microprocessors. The HIP6311A controls
microprocessor core voltage regulation by driving 2 to 4
synchronous-rectified buck channels in parallel. The multi-
phase buck topology takes advantage of interleaving phases
to increase ripple frequency and reduce input and output
ripple currents. Resulting in fewer components, reduced
component ratings, lower power dissipation, and smaller
implementation area.
The HIP6311A control IC features a 5 bit digital-to-analog
converter (DAC) that adjusts the core output voltage from
1.100V to 1.850V with an unsurpassed system accuracy of
±0.5% over temperature. The HIP6311A uses a lossless
current sensing approach in which the voltage developed
across the on-resistance of the lower MOSFETs during
conduction is sampled. Current sensing provides the
required signals for precision droop, channel-current
balancing, load sharing, and over-current protection.
Another feature of this control IC is the PGOOD monitor
which is held low until the core voltage increases to within
8% of the programmed voltage. An over-voltage condition is
detected when the output voltage exceeds 115% of the
programmed VID. This results in the converter shutting down
and PGOOD being pulled low. During an under-voltage
condition (output voltage 10% below the programmed VID),
PGOOD transitions low, but the converter continues to
operate.
Ordering Information
PART NUMBER TEMP. (^oC) PACKAGE PKG. NO.
HIP6311ACB
0 to 70 20 Ld SOIC M20.3
HIP6311ACBZ
(See Note)
0 to 70 20 Ld SOIC M20.3
(Pb-free)
HIP6311ACBZA
(See Note)
0 to 70 20 Ld SOIC M20.3
(Pb-free)
*Add “-T” suffix to part number for tape and reel packaging.
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is 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-020B.
July 2004
HIP6311A
FN9035.1
Features
• Precision CORE Voltage Regulation
- ±0.5% System Accuracy Over Temperature
• Microprocessor Voltage Identification Input
- 5-Bit VID Input
- 1.100V to 1.850V in 25mV Steps
- Programmable Droop Voltage
• R_DS(on) Current Sensing
- Accurate Channel Current Balancing
- Loss less Current Sampling
- Low-Cost Implementation
• Fast Transient Response
• Digital Soft Start
• Over Current Protection
• Selection of 2, 3, or 4 Phase Operation
• 50kHz to 1.5MHz Switching Frequency
• Pb-free available
Applications
• Desktop Motherboards
• Voltage Regulator Modules
• Servers and Workstations
Pinout
HIP6311A (SOIC)
TOP VIEW
VID4 1
VID3 2
VID2 3
VID1 4
VID0 5
COMP 6
FB 7
FS/DIS 8
GND 9
VSEN 10
20 V_CC
19 _PGOOD
18 _PWM4
17 _ISEN4
16 _ISEN1
15 _PWM1
14 _PWM2
13 ISEN2
12 ISEN3
11 PWM3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001, 2004, All Rights Reserved