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  ON Semiconductor Electronic Components Datasheet  

ADP3290 Datasheet

Programmable 2- to 4-Phase Synchronous Buck Controller

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ADP3290 pdf
ADP3290
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8-Bit, Programmable
2- to 4-Phase Synchronous
Buck Controller
The ADP3290 is a highly efficient, multiphase, synchronous buck
switching regulator controller optimized for converting a 12 V main
supply voltage into the core supply voltage of high performance Intel
processors. It uses an internal 8bit DAC to read a Voltage
Identification (VID) code directly from the processor, to set the output
voltage between 0.5 V and 1.6 V.
This device uses a multimode control architecture to drive the
logiclevel PWM outputs. The switching frequency can be
programmed according to VR size and efficiency. The chip can
provide 2, 3or 4phase operation, allowing for the construction of
up to four complementary buck switching stages.
The ADP3290 also includes programmable no load offset and load
line slope setting function that adjusts the output voltage as a function
of the load current, optimally positioning it for a system transient. The
ADP3290 also provides accurate and reliable shortcircuit protection,
adjustable current limit, and a delayed powergood output that
accommodates OnTheFly (OTF) output voltage changes requested
by the CPU.
Features
Selectable 2, 3, or 4Phase Operation at Up to 1 MHz Per Phase
±7 mV WorseCase Differential Sensing Error
LogicLevel PWM Outputs for Interface to External High Power
Drivers
FastEnhanced PWM FlexModet for Excellent Load Transient
Performance
TRDET to Improve Load Release
Active Current Balancing Between All Output Phases
BuiltIn PowerGood/Crowbar Blanking Supports Dynamic
VID Code Changes
Digitally Programmable 0.5 V to 1.6 V Output Supports
VR11.1 Specification
Programmable Overcurrent Protection with Programmable
Latchoff Delay
This is a PbFree Device
Typical Applications
Desktop PC Power Supplies for:
Next Generation Intel® Processors
VRM Modules
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Package Name
LFCSP40
CASE Number
932AC
MARKING
DIAGRAM
ADP3290
#_YYYYYY
ZZZZZZZZ
CCCCC
ADP3290 = Device Code
# = PbFree Package
YY = Date Code
ZZ = Assembly Lot Number
CC = Country of Origin
PIN ASSIGNMENT
EN 1
PWRGD 2
FBRTN 3
FB 4
COMP 5
SS 6
DELAY 7
TRDET 8
VRHOT 9
TTSNS 10
PIN 1
INDICATOR
ADP3290
TOP VIEW
30 PWM1
29 PWM2
28 PWM3
27 PWM4
26 ODN
25 SW1
24 SW2
23 SW3
22 SW4
21 IMON
ORDERING INFORMATION
Device
Package
Shipping
ADP3290JCPZRL LFCSP40 2500/Tape & Reel
(PbFree)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2009
July, 2009 Rev. 2
1
Publication Order Number:
ADP3290/D


  ON Semiconductor Electronic Components Datasheet  

ADP3290 Datasheet

Programmable 2- to 4-Phase Synchronous Buck Controller

No Preview Available !

ADP3290 pdf
ADP3290
GND 18
VCC
31
SHUNT
REGULATOR
UVLO
SHUTDOWN
800mV –
EN 1
+
DAC
+ 150mV
CSREF
+
+
DAC –
– 350mV
PWRGD 2
DELAY
TTSNS 10
VRHOT 9
THERMAL
THROTTLING
CONTROL
RT RAMP
12 13
OSCILLATOR
19 OD
+
CMP
SET EN
RESET
30 PWM1
+
CMP
RESET
29 PWM2
+
CMP
+
CMP
RESET
2/3/4PHASE
DRIVER LOGIC
RCEUSLREIMRTEITNT
28 PWM3
27 PWM4
CROWBAR
26 ODN
40 PSI
25 SW1
24 SW2
23 SW3
22 SW4
ILIM 11
DELAY 7
TRDET 8
IREF 20
COMP 5
TRDET
GENERATOR
CURRENT
MEASUREMENT
AND LIMIT
17 CSCOMP
15 CSREF
16 CSSUM
21 IMON
4 FB
FBRTN 3
PRECISION
REFERENCE
BOOT
VOLTAGE
AND
SOFT START
CONTROL
14 LLINE
6 SS
VID DAC
ADP3290
32 33 34 35 36 37 38 39
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0
Figure 1. Simplified Block Diagram
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2


Part Number ADP3290
Description Programmable 2- to 4-Phase Synchronous Buck Controller
Maker ON Semiconductor
Total Page 30 Pages
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