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LM2638 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM2638
Description  Motherboard Power Supply Solution with a 5-Bit Programmable Switching Controller and Two Linear Regulator Controllers
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2638 Datasheet(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics V
CC = 5V, VDD = 12V unless otherwise specified. Typicals and limits appearing in
plain type apply for T
A = TJ = +25˚C. Limits appearing in boldface type apply over the 0˚C to +70˚C range. (Continued)
TABLE 1. 5-Bit DAC Output Voltage Table
(V
CC = 5V, VDD = 12V ±5%,TA = 25˚C, Test Mode)
Symbol
Parameter
Conditions
Typical
Units
V
DACOUT
5-Bit DAC Output Voltages for Different VID Codes
VID4:0 = 01111
1.30
V
VID4:0 = 01110
1.35
VID4:0 = 01101
1.40
VID4:0 = 01100
1.45
VID4:0 = 01011
1.50
VID4:0 = 01010
1.55
VID4:0 = 01001
1.60
VID4:0 = 01000
1.65
VID4:0 = 00111
1.70
VID4:0 = 00110
1.75
VID4:0 = 00101
1.80
VID4:0 = 00100
1.85
VID4:0 = 00011
1.90
VID4:0 = 00010
1.95
VID4:0 = 00001
2.00
VID4:0 = 00000
2.05
VID4:0 = 11111
(shutdown)
VID4:0 = 11110
2.1
VID4:0 = 11101
2.2
VID4:0 = 11100
2.3
VID4:0 = 11011
2.4
VID4:0 = 11010
2.5
VID4:0 = 11001
2.6
VID4:0 = 11000
2.7
VID4:0 = 10111
2.8
VID4:0 = 10110
2.9
VID4:0 = 10101
3.0
VID4:0 = 10100
3.1
VID4:0 = 10011
3.2
VID4:0 = 10010
3.3
VID4:0 = 10001
3.4
VID4:0 = 10000
3.5
www.national.com
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