Datasheet

V
O
V
I
OUT
RESET
10kW
GND
EN
IN
TPS725xx
1 mF
C
O
TPS72501
TPS72515, TPS72516
TPS72518, TPS72525
SLVS341E –MAY 2002–REVISED JUNE 2010 www.ti.com
Figure 19. TPS72501 Fixed Output Typical Application Diagram
Table 1. Output Voltage Programming Guide (Standard 1% Resistor Values)
PROGRAM VOLTAGE R1 (kΩ) R2 (kΩ) ACTUAL VOLTAGE
1.8 V 56.2 118 1.801
2.5 V 127 121 2.5
3.3 V 196 115 3.299
3.6 V 205 105 3.602
Regulator Protection
The TPS725xx pass element has a built-in back diode that safely conducts reverse current when the input
voltage drops below the output voltage (e.g., during power down). Current is conducted from the output to the
input and is not internally limited. If extended reverse voltage is anticipated, external limiting might be
appropriate.
The TPS725xx also features internal current limiting and thermal protection. During normal operation, the
TPS725xx limits output current to approximately 1.6 A. 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. If the temperature of the
device exceeds 165°C, thermal-protection circuitry shuts it down. Once the device has cooled down to below
145°C, regulator operation resumes.
10 Submit Documentation Feedback Copyright © 2002–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS72501 TPS72515 TPS72516 TPS72518 TPS72525