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LM10010 データシート(PDF) 10 Page - Texas Instruments

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部品番号 LM10010
部品情報  LM10010 VID Voltage Programmer for Point of Load Regulator
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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

LM10010 データシート(HTML) 10 Page - Texas Instruments

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FB
PGOOD
VIN
LM21215A-1
VOUT
AGND
COMP
PVIN
SW
EN
CIN
COUT
LF
RC1
CC1
CC2
CC3
RFB1
RFB2
RC2
PGND
AVIN
CF
11-16
3
4
17
19
18
20
8,9,10
5,6,7
RF
SS/
TRK
CSS
2
optional
HTSSOP-20
EN
GND
VIDA
1
10
WSON-10
3 mm x 3 mm
VIDB
VIDC
VIDS
9
8
7
4
VDD
IDAC_OUT
3
2
0 - 59.2 PA
LM10010
SYNC
1
CVDD
3V to 5.5V
CVDD
CBYPASS
VCNTL[3]
VCNTL[2]
VCNTL[1]
VCNTL[0]
TMS320C6670/
TMS320C6678
0.7V to 1.1V
DVDD18
RPU1:4
LM10010
SNVS717C – JULY 2011 – REVISED MARCH 2013
www.ti.com
APPLICATION INFORMATION
Design Example
In this example, an LM21215A-1 is used as the buck regulator to provide CVDD to the TMS320C6670 or
TMS320C6678 from 0.7V to 1.1V and an output current of up to 15A. The LM10010 in conjunction with VID
control from the DSP, provides control of the output voltage within this range with 6 bits of resolution. For this
example, the 400 mV of voltage range translates to a 6.4 mV resolution in the control of the regulator output
voltage. In this calculation, 1% resistor values are used. A schematic for this example is shown in the circuit of
Figure 15.
Figure 15. Typical Application Circuit
Setting the VOUT Range and LSB
Looking at the Typical Application Circuit in Figure 15, the following equation defines VOUT of a given regulator
(valid for VOUT > VFB):
(1)
Here, the output voltage is a function of the resistor divider from RFB1 and RFB2. Additionally, there is a current
supplied by the LM10010 that helps drive the feedback resistor RFB2, thus lowering the necessary current
supplied through RFB1, and lowering VOUT.
10
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Copyright © 2011–2013, Texas Instruments Incorporated
Product Folder Links: LM10010


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