900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Analog Devices Semiconductor Electronic Components Datasheet

ADP3193A Datasheet

Synchronous Buck Controller

No Preview Available !

8-Bit, Programmable, 2- to 3-Phase,
Synchronous Buck Controller
ADP3193A
FEATURES
Selectable 2- or 3-phase operation at up to 1 MHz per phase
±7.7 mV worst-case differential sensing error over
temperature
Logic-level PWM outputs for interface to external high
power drivers
Fast enhanced PWM (FEPWM) flex mode for excellent load
transient performance
Active current balancing between all output phases
Built-in power-good/crowbar blanking supports on-the-fly
VID code changes
Digitally programmable 0.5 V to 1.6 V output supports both
VR10.x and VR11 specifications
Programmable short-circuit protection with programmable
latch-off delay
APPLICATIONS
Desktop PC power supplies for
Next generation Intel® processors
VRM modules
GENERAL DESCRIPTION
The ADP3193A1 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
performance Intel processors. It uses an internal 8-bit DAC to read
a voltage identification (VID) code directly from the processor,
which is used to set the output voltage between 0.5 V and 1.6 V.
This device 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 relation-
ship of the output signals can be programmed to provide 2- or
3-phase operation, allowing for the construction of up to three
complementary buck switching stages.
The ADP3193A also includes programmable no load offset and
slope functions to adjust the output voltage as a function of the
load current, optimally positioning it for a system transient. The
ADP3193A also provides accurate and reliable short-circuit
protection, adjustable current limiting, and delayed power-good
output that accommodates on-the-fly output voltage changes
requested by the CPU.
FUNCTIONAL BLOCK DIAGRAM
GND 14
VCC
23
SHUNT
REGULATOR
UVLO
SHUTDOWN
850mV –
EN 1
+
DAC
+150mV
CSREF
+
+
DAC –
–350mV
PWRGD 2
DELAY
ILIMIT 8
DELAY 7
RT RAMPADJ
9 10
OSCILLATOR
+
CMP
SET EN
RESET
15 OD
22 PWM1
+
CMP
+
CMP
21 PWM2
RESET
20 PWM3
2-/3-PHASE
DRIVER LOGIC
RESET
CROWBAR
CURRENT
LIMIT
19 SW1
18 SW2
17 SW3
13 CSCOMP
CURRENT
MEASUREMENT
+
11 CSREF
AND LIMIT
12 CSSUM
IREF 16
COMP 5
4 FB
FBRTN 3
PRECISION
REFERENCE
VIDSEL 32
VC DAC
24 25 26 27 28 29 30 31
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0
BOOT
VOLTAGE
AND
SOFT START
CONTROL
6
ADP3193A
SS
Figure 1.
The ADP3193A has a built-in shunt regulator that allows the
part to be connected to the 12 V system supply through a series
resistor.
The ADP3193A is specified over the extended commercial
temperature range of 0°C to 85°C and is available in a
32-lead LFCSP.
1 Protected by U.S. Patent Number 6,683,441; other patents 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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.


Analog Devices Semiconductor Electronic Components Datasheet

ADP3193A Datasheet

Synchronous Buck Controller

No Preview Available !

ADP3193A
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
Typical Performance Characteristics ............................................. 7
Test Circuits....................................................................................... 8
Theory of Operation ........................................................................ 9
Start-Up Sequence........................................................................ 9
Phase Detection Sequence........................................................... 9
Master Clock Frequency............................................................ 10
Output Voltage Differential Sensing ........................................ 10
Output Current Sensing ............................................................ 10
Current Control Mode and Thermal Balance ........................ 10
Voltage Control Mode................................................................ 10
Current Reference ...................................................................... 11
Fast Enhanced PWM Mode ...................................................... 11
Delay Timer................................................................................. 11
Soft Start ...................................................................................... 11
Current-Limit, Short-Circuit, and Latch-Off Protection...... 11
REVISION HISTORY
5/07—Revision 0: Initial Version
Dynamic VID ............................................................................. 12
Power-Good Monitoring........................................................... 12
Output Crowbar ......................................................................... 12
Output Enable and UVLO ........................................................ 13
Application Information................................................................ 19
Setting the Clock Frequency..................................................... 19
Soft Start Delay Time................................................................. 19
Current-Limit Latch-Off Delay Times .................................... 19
Inductor Selection ...................................................................... 19
Current Sense Amplifier............................................................ 20
Inductor DCR Temperature Correction ................................. 21
Output Offset .............................................................................. 21
COUT Selection ............................................................................. 22
Power MOSFETs......................................................................... 23
Ramp Resistor Selection............................................................ 24
COMP Pin Ramp ....................................................................... 24
Current-Limit Setpoint.............................................................. 24
Feedback Loop Compensation Design.................................... 25
CIN Selection and Input Current di/dt Reduction.................. 26
Shunt Resistor Design................................................................ 26
Tuning Procedure for ADP3193A............................................ 27
Layout and Component Placement ......................................... 29
Outline Dimensions ....................................................................... 30
Ordering Guide .......................................................................... 30
Rev. 0 | Page 2 of 32


Part Number ADP3193A
Description Synchronous Buck Controller
Maker Analog Devices
Total Page 30 Pages
PDF Download

ADP3193A Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 ADP3193 8-Bit Programmable Synchronous Buck Controller
Analog Devices
2 ADP3193A Synchronous Buck Controller
Analog Devices





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy