TPS75201MEP

FAST TRANSIENT RESPONSE 2A LOW DROPOUT VOLTAGE REGULATOR

WITH RESET

SGLS325 − JANUARY 2006

13

POST OFFICE BOX 655303

APPLICATION INFORMATION

The TPS75201M-EP is an adjustable regulator (from 1.5 V to 5 V).

minimum load requirements

The TPS75201M-EP is stable, even at no load; no minimum load is required for operation.

pin functions

enable (EN)

The EN input enables or shuts down the device. If EN is a logic high, the device is in shutdown mode. When

EN goes to logic low, the device is enabled.

reset (RESET)

of the regulated voltage, RESET goes to a low-impedance state after a 100-ms delay. RESET goes to a

a pullup resistor.

sense (SENSE)

The SENSE terminal of the fixed-output options must be connected to the regulator output, and the connection

should be as short as possible. Internally, SENSE connects to a high-impedance wide-bandwidth amplifier

through a resistor-divider network, and noise pickup feeds through to the regulator output. It is essential to route

the SENSE connection in such a way to minimize/avoid noise pickup. Adding RC networks between SENSE

feedback (FB)

FB is an input used for the adjustable-output options and must be connected to an external feedback resistor

divider. The FB connection should be as short as possible. It is essential to route it in such a way to

because it may cause the regulator to oscillate.

ground/heat sink (GND/HEATSINK)

All GND/HEATSINK terminals are connected directly to the mount pad for thermal-enhanced operation. These

terminals could be connected to GND or left floating.

input capacitor

For a typical application, an input bypass capacitor (0.22

µF−1 µF) is recommended for device stability. This

capacitor should be as close to the input pins as possible. For fast transient condition, where droop at the input

of the LDO may occur due to high in-rush current, it is recommended to place a larger capacitor at the input as

well. The size of this capacitor is dependant on the output current and response time of the main power supply,

as well as the distance to the load (LDO).