ADP3153 Datasheet PDF - Analog Devices
| Part Number | ADP3153 | |
| Description | 5-Bit Programmable Dual Power Supply Controller for Pentium II Processor | |
| Manufacturers | Analog Devices | |
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FEATURES
5-Bit Digitally Programmable 1.8 V to 3.5 V Output
Voltage
Dual N-Channel Synchronous Driver
Total Output Accuracy ؎1% (0؇C to +70؇C)
High Efficiency
Current-Mode Operation
Short Circuit Protection
Power Good Output
Overvoltage Protection Crowbar
On-Board Linear Regulator Controller
VRM 8.2 Compatible
Narrow Body TSSOP 20-Lead Package
APPLICATIONS
Desktop PC Power Supply for:
Pentium II Processor
Deschutes Processor
Pentium Pro Processor
Pentium Processor
AMD–K6 Processor
VRM Modules
5-Bit Programmable Dual
Power Supply Controller
for Pentium® II Processor
ADP3153
GENERAL DESCRIPTION
The ADP3153 is a highly efficient synchronous switching regu-
lator controller and a linear regulator controller. The switching
regulator controller is optimized for Pentium II and Deschutes
Processor applications where 5 V is stepped down to a digitally
controlled output voltage between 1.8 V and 3.5 V. Using a 5-bit
DAC to read a voltage identification (VID) code directly from
the processor, the ADP3153 uses a current mode constant off-
time architecture to generate its precise output voltage.
The ADP3153 drives two N-channel MOSFETS in a synchro-
nous rectified buck converter, at a maximum switching fre-
quency of 250 kHz. Using the recommended loop compensation
and guidelines, the ADP3153 provides a dc/dc converter that
meets Intel’s stringent transient specifications with a minimum
number of output capacitors and smallest footprint. Addition-
ally, the current mode architecture also provides guaranteed
short circuit protection and adjustable current limiting.
The ADP3153’s linear regulator controller drives an external
N-channel device. The output voltage is set by the ratio of the
external feedback resistors. The controller has been designed for
excellent load transient response.
VCC
+12V
VIN
+5V
VO2
+3.3V
1A
R1
VIN
+5V R2
IRL2703
1000F
35k⍀
20k⍀
22F 1F
CCOMP
SD VCC
DRIVE1
CMP
ADP3153
VLDO
SENSE+
SENSE–
IRL3103
1nF
150pF
FB DRIVE2
CT PGND
AGND
VID0–VID4
IRL3103
+ CIN
L
2.5H
RSENSE
7m⍀
10BQ015
+ CO
VO
1.8V–3.5V
14A
5-BIT CODE
Figure 1. Typical Application
Pentium is a registered trademark of Intel Corporation.
All other trademarks are the property of their respective holders.
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1998
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100
SEE FIGURE 2
95
VOUT = +3.5V
90
85
VOUT = +2.0V
80
VOUT = +2.8V
75
70
65
1.4 2.8 4.2 5.6 7.0 8.4 9.8 11.2 12.6 14.0
OUTPUT CURRENT – Amps
Figure 4. Efficiency vs. Output Current
Typical Performance Characteristics–ADP3153
450
400
350
300
250
200
150
100
50
0
50 100 200 300 400 500 600 700 800
TIMING CAPACITOR – pF
Figure 5. Frequency vs. Timing
Capacitor
45
40
35
30
25
20
15
10
5
0
45
Qn + Qn = 100nC
58 83 134
OPERATING FREQUENCY – kHz
397
Figure 6. Gate Charge vs. Supply
Current
SEE FIGURE 2
VOUT = +3.5V, IOUT = 10A
PRIMARY
N-DRIVE
DRIVER OUTPUT
1
SECONDARY
N-DRIVE
DRIVER OUTPUT
2
DRIVE 1 AND 2 = 5V/DIV
500ns/DIV
Figure 7. Gate Switching Waveforms
SEE FIGURE 2
VCC = +12V
VIN = +5V
VOUT = +3.5V
IOUT = 10A
100ns/DIV
Figure 8. Driver Transition Waveforms
OUTPUT VOLTAGE
20mV/DIV
OUTPUT CURRENT
14A TO 1A
10s/DIV
Figure 9. Transient Response,
14 A–1A of Figure 2 Circuit
OUTPUT VOLTAGE
20mV/DIV
OUTPUT CURRENT
1A TO 14A
10s/DIV
Figure 10. Transient Response,
1A–14 A of Figure 2 Circuit
VCC VOLTAGE
5V/DIV
3
REGULATOR
OUTPUT VOLTAGE
1V/DIV
4
10ms/DIV
Figure 11. Power-On Start-Up
Waveforms
25
TA = +25؇C
SEE FIGURE 13
20
15
10
5
0
OUTPUT ACCURACY – %
Figure 12. Output Accuracy Distribution
REV. 0
–5–
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ADP3153 electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ADP3153.PDF Datasheet ] | |
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| Part Number | Description | MFRS |
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| ADP3153 | The function is 5-Bit Programmable Dual Power Supply Controller for Pentium II Processor. Analog Devices | |
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