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ADP3180JRU-REEL 데이터시트 PDF




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부품번호 ADP3180JRU-REEL 기능
기능 6-Bit Programmable 2-/ 3-/ 4-Phase Synchronous Buck Controller
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ADP3180JRU-REEL 데이터시트, 핀배열, 회로
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.




ADP3180JRU-REEL pdf, 반도체, 판매, 대치품
ADP3180
ABSOLUTE MAXIMUM RATINGS*
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +15 V
FBRTN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
VID0–VID5, EN, DELAY, ILIMIT, CSCOMP, RT,
PWM1–PWM4, COMP . . . . . . . . . . . . . . . . –0.3 V to +5.5 V
SW1–SW4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –5 V to +25 V
All Other Inputs and Outputs . . . . . . . . . –0.3 V to VCC + 0.3 V
Operating Ambient Temperature Range . . . . . . . . 0°C to 85°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . 125°C
Storage Temperature Range . . . . . . . . . . . . . . –65°C to +150°C
Junction to Air Thermal Resistance (JA) . . . . . . . . . . . 100°C/W
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . . . 300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C
*Stresses above those listed under Absolute Maximum Ratings may cause permanent
damage to the device.This is a stress rating only; functional operation of the device
at these or any other conditions above those listed in the operational sections of
this specification is not implied. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability. Absolute maximum ratings apply
individually only, not in combination. Unless otherwise specified, all other voltages
are referenced to GND.
Model
ADP3180JRU-REEL7
ADP3180JRU-REEL
ORDERING GUIDE
Temperature
Range
0°C to 85°C
0°C to 85°C
Package
Options
RU-28 (TSSOP-28)
RU-28 (TSSOP-28)
Quantity
per Reel
1000
2500
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate
on the human body and test equipment and can discharge without detection. Although the ADP3180
features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high
energy electrostatic discharges.Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
PIN CONFIGURATION
VID4 1
VID3 2
VID2 3
VID1 4
VID0 5
VID5 6
FBRTN 7
FB 8
COMP 9
PWRGD 10
EN 11
DELAY 12
RT 13
RAMPADJ 14
ADP3180
TOP VIEW
(Not to Scale)
28 VCC
27 PWM1
26 PWM2
25 PWM3
24 PWM4
23 SW1
22 SW2
21 SW3
20 SW4
19 GND
18 CSCOMP
17 CSSUM
16 CSREF
15 ILIMIT
–4– REV. 0

4페이지










ADP3180JRU-REEL 전자부품, 판매, 대치품
ADP3180
Table I. Output Voltage vs. VID Code
VID4
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
VID3
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
VID2
1
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
VID1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
0
0
1
1
1
1
VID0
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
1
1
0
0
1
1
0
0
VID5
X
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
VOUT(NOM)
No CPU
0.8375 V
0.850 V
0.8625 V
0.875 V
0.8875 V
0.900 V
0.9125 V
0.925 V
0.9375 V
0.950 V
0.9625 V
0.975 V
0.9875 V
1.000 V
1.0125 V
1.025 V
1.0375 V
1.050 V
1.0625 V
1.075 V
1.0875 V
1.100 V
1.1125 V
1.125 V
1.1375 V
1.150 V
1.1625 V
1.175 V
1.1875 V
1.200 V
1.2125 V
THEORY OF OPERATION
The ADP3180 combines a multimode, fixed frequency PWM
control with multiphase logic outputs for use in 2-, 3-, and
4-phase synchronous buck CPU core supply power converters.
The internal 6-bit VID DAC conforms to Intel’s VRD/VRM 10
specifications. Multiphase operation is important for produc-
ing the high currents and low voltages demanded by today’s
microprocessors. Handling the high currents in a single-phase
converter would place high thermal demands on the components
in the system such as the inductors and MOSFETs.
The multimode control of the ADP3180 ensures a stable, high
performance topology for:
Balancing currents and thermals between phases
High speed response at the lowest possible switching frequency
and output decoupling
Minimizing thermal switching losses due to lower frequency
operation
Tight load line regulation and accuracy
High current output from having up to 4-phase operation
Reduced output ripple due to multiphase cancellation
PC board layout noise immunity
VID4 VID3 VID2 VID1 VID0 VID5 VOUT(NOM)
1 1 0 0 1 1 1.225 V
1 1 0 0 1 0 1.2375 V
1 1 0 0 0 1 1.250 V
1 1 0 0 0 0 1.2625 V
1 0 1 1 1 1 1.275 V
1 0 1 1 1 0 1.2875 V
1 0 1 1 0 1 1.300 V
1 0 1 1 0 0 1.3125 V
1 0 1 0 1 1 1.325 V
1 0 1 0 1 0 1.3375 V
1 0 1 0 0 1 1.350 V
1 0 1 0 0 0 1.3625 V
1 0 0 1 1 1 1.375 V
1 0 0 1 1 0 1.3875 V
1 0 0 1 0 1 1.400 V
1 0 0 1 0 0 1.4125 V
1 0 0 0 1 1 1.425 V
1 0 0 0 1 0 1.4375 V
1 0 0 0 0 1 1.450 V
1 0 0 0 0 0 1.4625 V
0 1 1 1 1 1 1.475 V
0 1 1 1 1 0 1.4875 V
0 1 1 1 0 1 1.500 V
0 1 1 1 0 0 1.5125 V
0 1 1 0 1 1 1.525 V
0 1 1 0 1 0 1.5375 V
0 1 1 0 0 1 1.550 V
0 1 1 0 0 0 1.5625 V
0 1 0 1 1 1 1.575 V
0 1 0 1 1 0 1.5875 V
0 1 0 1 0 1 1.600 V
X = Don't Care
Ease of use and design due to independent component selection
Flexibility in operation for tailoring design to low cost or high
performance
Number of Phases
The number of operational phases and their phase relationship
is determined by the internal circuitry that monitors the PWM
outputs. Normally, the ADP3180 operates as a 4-phase PWM
controller. Grounding the PWM4 pin programs 3-phase opera-
tion, and grounding the PWM3 and PWM4 pins programs
2-phase operation.
When the ADP3180 is enabled, the controller outputs a voltage
on PWM3 and PWM4 that is approximately 550 mV. An inter-
nal comparator checks each pin’s voltage versus a threshold of
400 mV. If the pin is grounded, then it will be below the thresh-
old and the phase will be disabled. The output resitance of the
PWM pin is approximately 5 kW during this detection time. Any
external pull-down resistance connected to the PWM pin should
not be less than 25 kW to ensure proper operation. The phase
detection is made during the first two clock cycles of the internal
oscillator. After this time, if the PWM output was not grounded,
the 5 kW resistance is removed and will switch between 0 V and
5 V. If the PWM output was grounded, it will remain off.
REV. 0
–7–

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