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ADP3180JRU-REEL Datasheet دیتاشیت PDF دانلود

دیتاشیت - Analog Devices - 6-Bit Programmable 2-/ 3-/ 4-Phase Synchronous Buck Controller

شماره قطعه ADP3180JRU-REEL
شرح مفصل 6-Bit Programmable 2-/ 3-/ 4-Phase Synchronous Buck Controller
تولید کننده Analog Devices 
آرم Analog Devices 


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ADP3180JRU-REEL شرح
6-Bit Programmable 2-, 3-, 4-Phase
Synchronous Buck Controller
ADP3180*
FEATURES
Selectable 2-, 3-, or 4-Phase Operation at up to
1 MHz per Phase
؎14.5 mV Worst-Case Differential Sensing Error over
Temperature
Logic-Level PWM Outputs for Interface to
External High Power Drivers
Active Current Balancing between All Output Phases
Built-In Power Good/Crowbar Blanking Supports
On-the-Fly VID Code Changes
6-Bit Digitally Programmable 0.8375 V to 1.6 V Output
Programmable Short Circuit Protection with
Programmable Latch-Off Delay
APPLICATIONS
Desktop PC Power Supplies for:
Next Generation Intel® Processors
VRM Modules
GENERAL DESCRIPTION
The ADP3180 is a highly efficient multiphase 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. It uses an internal 6-bit DAC to read
a voltage identification (VID) code directly from the processor,
which is used to set the output voltage between 0.8375 V and
1.6 V, and uses a multimode PWM architecture to drive the logic
level outputs at a programmable switching frequency that can be
optimized for VR size and efficiency. The phase relationship of the
output signals can be programmed to provide 2-, 3-, or 4-phase
operation, allowing for the construction of up to four comple-
mentary buck switching stages.
The ADP3180 also includes programmable no-load offset and
slope functions to adjust the output voltage as a function of the
load current so that it is always optimally positioned for a system
transient. The ADP3180 also provides accurate and reliable short
circuit protection, adjustable current limiting, and a delayed
Power Good output that accommodates on-the-fly output voltage
changes requested by the CPU.
ADP3180 is specified over the commercial temperature range of
0°C to 85°C and is available in a 28-lead TSSOP package.
FUNCTIONAL BLOCK DIAGRAM
VCC
28
RAMPADJ RT
14 13
ADP3180
11
EN
UVLO
SHUTDOWN
AND BIAS
19
GND DAC
+150mV
CSREF
DAC
–250mV
10
PWRGD
DELAY
15
ILIMIT
EN
12
DELAY
SOFT-
START
OSCILLATOR
CMP
SET EN
RESET
27
PWM1
CURRENT
BALANCING
CIRCUIT
CMP RESET
26
2-, 3-, 4-PHASE PWM2
DRIVER LOGIC
CMP RESET
25
PWM3
CMP RESET
CROWBAR
CURRENT
LIMIT
CURRENT
LIMIT
CIRCUIT
24
PWM4
23
SW1
22
SW2
21
SW3
20
SW4
17
CSSUM
16
CSREF
18
CSCOMP
9
COMP
8
FB
PRECISION
REFERENCE
VID
DAC
7
FBRTN
123456
VID4 VID3 VID2 VID1 VID0 VID5
*Patent Pending
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
that may result from its use. No license is granted by implication or oth-
erwise under any patent or patent rights of Analog Devices.Trademarks
and registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© 2003 Analog Devices, Inc. All rights reserved.

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