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LM10011 データシート(PDF) 9 Page - Texas Instruments

部品番号 LM10011
部品情報  LM10011 6/4-Bit VID Programmable Current DAC for Point of Load Regulators with Adjustable Start-Up Current
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

LM10011 データシート(HTML) 9 Page - Texas Instruments

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background image
rise
Edge-Detector
fall
VIDA
UVLO
D
Q
Q
R
UVLO
rise
fall
VID[3]
Bandgap
Core
+
-
IREF
6 bit
IDAC
IDAC_OUT
0 ± 56.4 / 59.2 µA
(4-bit / 6-bit)
UVLO
(VDD > 2.65V)
PRECISION
ENABLE
(1.34V)
VDD
EN
DISABLE
GND
Slew
Limit
Logic
Receiver
Update DAC
VIDB
VIDC
VIDS
3 µs
deglitch
Logic
Receiver
3 µs
deglitch
Logic
Receiver
3 µs
deglitch
Logic
Receiver
6 µs
deglitch
VID[0]
D
Q
Q
R
UVLO
D
Q
Q
R
UVLO
rise
fall
VID[4]
VID[1]
D
Q
Q
R
UVLO
D
Q
Q
R
UVLO
rise
fall
VID[5]
VID[2]
D
Q
Q
R
3 µs
deglitch
VID Start-
Up Current
Set
6-BIT
MODE=0
Edge-
Detector
VID[0]
VID[1]
VID[2]
VID[3]
4-BIT
MODE=1
MODE
RSET
3 µs
deglitch
LM10011
www.ti.com
SNVS822A – DECEMBER 2012 – REVISED NOVEMBER 2014
7 Detailed Description
7.1 Overview
The LM10011 is a precision current DAC used for controlling any point of load regulator with an adjustable
resistor feedback network. Four VID communication lines (VIDA, VIDB, VIDC, and VIDS) are used to write a 6-bit
or 4-bit VID value. The output of the IDAC (IDAC_OUT) is used to inject a precision current into the feedback
node of a regulator, thus adjusting the output voltage. With this method, it is possible to precisely control the
output voltage of the regulator.
An enable pin (EN) is provided to allow for a reduced quiescent current when not in use. Also, the VDD line is
monitored so that an undervoltage event will shutdown the LM10011 (IDAC_OUT = 0.0 µA).
The device is available in a 10-pad No-Pullback Package (SON-10). The LM10011 can be used in numerous
applications with regulators from 2.97-V to 5.5-V supplies.
7.2 Functional Block Diagram
Copyright © 2012–2014, Texas Instruments Incorporated
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