Datasheet
www.ti.com
GNDNR
FB
IN OUT
EN
V
IN
V
OUT
R
1
C
1
R
2
1 Fm
2.2 Fm
0.01 Fm
TPS79301
OUTPUTVOLTAGE
PROGRAMMINGGUIDE
R
1
R
2
C
1
2.5V
3.3V
3.6V
1.22V
OUTPUT
VOLTAGE
31.6kW
short
51kW
59kW
open
30.1kW
30.1kW
30.1kW
0pF
22pF
15pF
15pF
Regulator Protection
TPS793xx
SLVS348K – JULY 2001 – REVISED OCTOBER 2007
Figure 23. TPS79301 Adjustable LDO Regulator Programming
The TPS793xx PMOS-pass transistor has a built-in back diode that conducts reverse current when the input
voltage drops below the output voltage (for example, during power-down). Current is conducted from the output
to the input and is not internally limited. If extended reverse voltage operation is anticipated, external limiting
might be appropriate.
The TPS793xx features internal current limiting and thermal protection. During normal operation, the TPS793xx
limits output current to approximately 400mA. When current limiting engages, the output voltage scales back
linearly until the overcurrent condition ends. While current limiting is designed to prevent gross device failure,
care should be taken not to exceed the power dissipation ratings of the package or the absolute maximum
voltage ratings of the device. If the temperature of the device exceeds approximately +165 ° C, thermal-protection
circuitry shuts it down. Once the device has cooled down to below approximately +140 ° C, regulator operation
resumes.
10 Submit Documentation Feedback Copyright © 2001 – 2007, Texas Instruments Incorporated