TPS732xx
www.ti.com
SBVS037I–AUGUST 2003–REVISED MAY 2006
FUNCTIONAL BLOCK DIAGRAMS
IN
Charge
Pump
EN
Thermal
Protection
Ref
Servo
Ω
27k
Bandgap
Error
Amp
Current
Limit
OUT
Ω
8k
GND
R1
R2
Ω
R1 + R2 = 80k
NR
Figure 1. Fixed Voltage Version
IN
Table 1. Standard 1%
Resistor Values for
Common Output Voltages
V
OUT
R
1
R
2
Charge
Pump
1.2V
1.5V
1.8V
2.5V
2.8V
3.0V
3.3V
5.0V
Short
Open
23.2kΩ
28.0kΩ
39.2kΩ
44.2kΩ
46.4kΩ
52.3kΩ
78.7kΩ
95.3kΩ
56.2kΩ
36.5kΩ
33.2kΩ
30.9kΩ
30.1kΩ
24.9kΩ
EN
Thermal
Protection
Ref
Servo
Ω
27k
Bandgap
Error
Amp
OUT
Current
Limit
NOTE: V
= (R + R )/R × 1.204;
1 2 2
OUT
R
R
19kΩ for best
1
2
GND
Ω
80k
Ω
8k
R1
R2
accuracy.
FB
Figure 2. Adjustable Voltage Version
4
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