Electronic component search and free download site.
Transistors,MosFET ,Diode,Integrated circuits
Part Name  

TPS79901-EP View Datasheet(PDF) - Texas Instruments

Part NameTPS79901-EP TI
Texas Instruments TI
Description200-mA, Low-Quiescent Current, Ultra-Low-Noise, High-PSRR Low-Dropout Linear Regulator
TPS79901-EP Datasheet PDF : 27 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
TPS79901-EP
SBVS330A – SEPTEMBER 2017 – REVISED OCTOBER 2017
7 Detailed Description
www.ti.com
7.1 Overview
The TPS79901 low-dropout (LDO) regulator combines the high performance required of many RF and precision
analog applications with ultra-low-current consumption. High PSRR is provided by a high-gain, high-bandwidth
error loop with good supply rejection at very low headroom (VIN – VOUT). A noise-reduction pin is provided to
bypass noise generated by the band-gap reference and to improve PSRR, while a quick-start circuit quickly
charges this capacitor at start-up. The combination of high performance and low ground current also make these
devices an excellent choice for portable applications. All versions have thermal and overcurrent protection, and
are fully specified from –55°C to +125°C.
The TPS79901 also features inrush current protection with an EN toggle start-up, and overshoot detection at the
output. When the EN toggle is used to start the device, current limit protection is immediately activated,
restricting the inrush current to the device. If voltage at the output overshoots 5% from the nominal value, a
pulldown resistor reduces the voltage to normal operating conditions, as shown in the Functional Block Diagram.
7.2 Functional Block Diagram
IN
Current
Limit
EN
UVLO
3.3MW
400W
OUT
Thermal
Shutdown
Overshoot
Detect
1.193V
Bandgap
FB
500k
GND
Copyright © 2017, Texas Instruments Incorporated
Figure 27. Adjustable-Voltage Versions
7.3 Feature Description
7.3.1 Internal Current Limit
The TPS79901 internal current limit helps protect the regulator during fault conditions. In current limit mode, the
output sources a fixed amount of current that is largely independent of the output voltage. For reliable operation,
do not operate the device in a current-limit state for extended periods of time.
The PMOS pass element in the TPS79901 has a built-in body diode that conducts current when the voltage at
OUT exceeds the voltage at IN. This current is not limited; therefore, if extended reverse voltage operation is
anticipated, external limiting may be required.
7.3.2 Shutdown
The enable pin (EN) is active high and is compatible with standard and low-voltage TTL-CMOS levels. When
shutdown capability is not required, EN can be connected to IN.
12
Submit Documentation Feedback
Product Folder Links: TPS79901-EP
Copyright © 2017, Texas Instruments Incorporated
Direct download click here

 

Share Link : 
All Rights Reserved© datasheetq.com 2015 - 2019  ] [ Privacy Policy ] [ Request Datasheet  ] [ Contact Us ]