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ADP3164RU-REEL7

Description
5-Bit Programmable 4-Phase Synchronous Buck Controller
CategoryPower/power management    The power supply circuit   
File Size246KB,15 Pages
ManufacturerON Semiconductor
Websitehttp://www.onsemi.cn
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ADP3164RU-REEL7 Overview

5-Bit Programmable 4-Phase Synchronous Buck Controller

ADP3164RU-REEL7 Parametric

Parameter NameAttribute value
MakerON Semiconductor
package instructionTSSOP,
Reach Compliance Codeunknow
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage14 V
Minimum input voltage10 V
Nominal input voltage12 V
JESD-30 codeR-PDSO-G20
length6.5 mm
Number of functions1
Number of terminals20
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Maximum seat height1.1 mm
surface mountYES
Switch configurationBUCK
Temperature levelCOMMERCIAL
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
width4.4 mm
a
FEATURES
ADOPT™ Optimal Positioning Technology for Superior
Load Transient Response and Fewest Output
Capacitors
Complies with VRM 9.1 with Lowest System Cost
4-Phase Operation at up to 500 kHz per Phase
Quad Logic-Level PWM Outputs for Interface to
External High-Power Drivers
Active Current Balancing between All Output Phases
Accurate Multiple VRM Module Current Sharing
5-Bit Digitally Programmable 1.1 V to 1.85 V Output
Total Output Accuracy 0.8% Over Temperature
Current-Mode Operation
Short Circuit Protection
Enhanced Power Good Output Detects Open Outputs
in Multi-VRM Power Systems
Overvoltage Protection Crowbar Protects
Microprocessors with No Additional
External Components
APPLICATIONS
Desktop PC Power Supplies for:
Intel Pentium
®
4 Processors
VRM Modules
5-Bit Programmable 4-Phase
Synchronous Buck Controller
ADP3164
FUNCTIONAL BLOCK DIAGRAM
VCC
ADP3164
UVLO
& BIAS
SET
RESET
CROWBAR
REF
GND
DAC + 20%
CT
OSCILLATOR
POWER
GOOD
3.0V
REFERENCE
4-PHASE
DRIVER
LOGIC
PWM1
PWM2
PWM3
PWM4
PGND
PWRGD
SHARE
CMP
CMP
DAC – 20%
CS–
CS+
FB
g
m
SOFT
START
COMP
VID
DAC
VID4 VID3 VID2 VID1 VID0
GENERAL DESCRIPTION
The ADP3164 is a highly efficient 4-phase synchronous buck
switching regulator controller optimized for converting a 12 V
main supply into the core supply voltage required by high per-
formance Intel processors. The ADP3164 uses an internal 5-bit
DAC to read a voltage identification (VID) code directly from
the processor, which is used to set the output voltage between
1.1 V and 1.85 V. The ADP3164 uses a current mode PWM
architecture to drive the logic-level outputs at a programmable
switching frequency that can be optimized for VRM size and
efficiency. The four output phases share the dc output current
to reduce overall output voltage ripple. An active current bal-
ancing function ensures that all phases carry equal portions of
the total load current, even under large transient loads, to mini-
mize the size of the inductors.
Pentium is a registered trademark of Intel Corporation.
The ADP3164 also uses a unique supplemental regulation tech-
nique called active voltage positioning (ADOPT) to enhance
load transient performance. Active voltage positioning results in
a dc/dc converter that meets the stringent output voltage specifi-
cations for high-performance processors, with the minimum
number of output capacitors and smallest footprint. Unlike
voltage-mode and standard current-mode architectures, active
voltage positioning adjusts the output voltage as a function of the
load current so that it is always optimally positioned for a system
transient. The ADP3164 also provides accurate and reliable short
circuit protection, adjustable current limiting, and an enhanced
Power Good output that can detect open outputs in any phase for
single or multi-VRM systems.
The ADP3164 is specified over the commercial temperature
range of 0°C to 70°C and is available in a 20-lead TSSOP package.
REVISION HISTORY
01/08 Rev 1: Conversion to ON Semiconductor
©2010 SCILLC. All rights reserved.
May 2010 - Rev. 2
Publication Order Number:
ADP3164/D

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