TPS736xx
www.ti.com
SBVS038K–SEPTEMBER 2003–REVISED SEPTEMBER 2005
FUNCTIONAL BLOCK DIAGRAMS
IN
4MHz
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
O
R
1
R
2
4MHz
1.2V
1.5V
1.8V
2.5V
2.8V
3.0V
3.3V
Short
Open
Charge Pump
23.2kΩ
28.0kΩ
39.2kΩ
44.2kΩ
46.4kΩ
52.3kΩ
95.3kΩ
56.2kΩ
36.5kΩ
33.2kΩ
30.9kΩ
30.1kΩ
EN
Thermal
Protection
Ref
Servo
Ω
27k
Bandgap
Error
Amp
NOTE: V
= (R + R )/R × 1.204;
1 2 2
OUT
OUT
FB
Current
Limit
R
R
19kΩ for best
1
2
accuracy.
GND
Ω
80k
Ω
8k
R1
R2
Figure 2. Adjustable Voltage Version
4