IN

GND

OUT

+

UVLO

Overcurrent

detection

Regulator

control

Thermal

shutdown

Band gap

Copyright © 2016, Texas Instruments Incorporated

9

TPS7B6933, TPS7B6950

www.ti.com

SLVSDI2 – APRIL 2016

Product Folder Links: TPS7B6933 TPS7B6950

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Copyright © 2016, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The TPS7B69xx high-voltage linear regulator operates across a 4-V to 40-V input-voltage range. The device has

an output current capacity of 150 mA and fixed output voltages of 3.3 V (TPS7B6933) or 5 V (TPS7B6950). The

device features thermal shutdown and short-circuit protection to prevent damage during overtemperature and

overcurrent conditions.

7.2 Functional Block Diagram

7.3 Feature Description

7.3.1 Input (IN)

The IN pin is a high-voltage-tolerant pin. TI recommends that a capacitor with a value higher than 0.1 µF be

connected near this pin to improve the transient performance.

7.3.2 Output (OUT)

The OUT pin is the regulated output based on the required voltage. The output has current limitation. During the

initial power up, the regulator has a soft start incorporated to control the initial current through the pass element

and the output capacitor.

In the event that the regulator drops out of regulation, the output tracks the input minus a drop based on the load

current. When the input voltage drops below the UVLO threshold, the regulator shuts down until the input voltage

recovers above the minimum start-up level.

7.3.3 Output Capacitor Selection

For stable operation over the full temperature range and with load currents up to 150 mA, use a capacitor with an

effective value between 2.2 µF and 100 µF and ESR smaller than 2

Ω. To improve the load-transient

performance, an output capacitor, such as a ceramic capacitor with low ESR, is recommended.