Datasheet

3.2R
32R 16R 8R 4R 2R 1R
V
IN
OUT
SNS
FB
FB
0.5 V
50mV 100mV 200mV 400mV 800mV 1.6V
OUT
SNS
FB
PG
50mV
IN
Thermal Pad
EN
SS
NC
1.6V
100mV
200mV
GND
400mV
800mV
OUT
OUT
GND
IN
IN
R1
R2
R1
R2
Optional
V =
OUT
´ 0.500
(R + R )
1 2
R
2
C
FF
C
FF
TPS7A7100
SBVS189E MARCH 2012REVISED SEPTEMBER 2013
www.ti.com
TRADITIONAL ADJUSTABLE CONFIGURATION
For any output voltage target that is not supported in the USER-CONFIGURABLE OUTPUT VOLTAGE section,
a traditional adjustable configuration with external-feedback resistors can be used with the TPS7A7100. shows
how to configure the TPS7A7100 as an adjustable regulator with an equation and Table 2 lists recommended
pairs of feedback resistor values.
NOTE
The bottom side of feedback resistor R2 in should be in the range of 27 kΩ to 33 kΩ in
order to maintain the specified regulation accuracy.
Figure 40. Traditional Adjustable Configuration with External Resistors
Table 2. Recommended Feedback-Resistor Values
E96 SERIES R40 SERIES
V
OUT(TARGET)
(V)
R1 (kΩ) R2 (kΩ) R1 (kΩ) R2 (kΩ)
1.00 30.1 30.1 30.0 30.0
1.20 39.2 28.0 43.7 31.5
1.50 61.9 30.9 60.0 30.0
1.80 80.6 30.9 80.0 30.7
1.90 86.6 30.9 87.5 31.5
2.50 115 28.7 112 28.0
3.00 147 29.4 150 30.0
3.30 165 29.4 175 31.5
5.00 280 30.9 243 27.2
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