The TPS745 is an adjustable 500-mA low-dropout (LDO) regulator with power-good functionality. This device is available in a small, 6-pin, 2-mm × 2-mm WSON package and consumes very low quiescent current and provides fast line and load transient performance. The TPS745 features an ultra-low dropout of 130 mV at 500 mA that can help improve the power efficiency of the system.
The TPS745 is optimized for a wide variety of applications by supporting an input voltage range from 1.5 V to 6.0 V and an externally adjustable output range of 0.55 V to 5.5 V. The low output voltage enables this LDO to power the modern microcontrollers with lower core voltages.
The TPS745 has a power-good (PG) output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The EN input and PG output can be used for the sequencing multiple power sources in the system.
The TPS745 is stable with small ceramic output capacitors, allowing for a small overall solution size. A precision band-gap and error amplifier provides high accuracy of 0.7% (max) at 25°C and 1% (max) over temperature (85ºC). This device includes integrated thermal shutdown, current limit, and undervoltage lockout (UVLO) features. The TPS745 has an internal foldback current limit that helps reduce the thermal dissipation during short-circuit events.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS745 | WSON (6) | 2.00 mm × 2.00 mm |
Changes from * Revision (April 2018) to A Revision
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
EN | 4 | Input | Enable pin. Drive EN greater than VEN(HI) to turn on the regulator.
Drive EN less than VEN(LO) to put the LDO into shutdown mode. |
FB | 2 | — | This pin is used as an input to the control loop error amplifier and is used to set the output voltage of the LDO. |
GND | 3 | — | Ground pin |
IN | 6 | Input | Input pin. For best transient response and to minimize input impedance, use the recommended value or larger ceramic capacitor from IN to ground as listed in the Recommended Operating Conditions table and the Input and Output Capacitor Selection section. Place the input capacitor as close to the output of the device as possible. |
OUT | 1 | Output | Regulated output voltage pin. A capacitor is required from OUT to ground for stability. For best transient response, use the nominal recommended value or larger ceramic capacitor from OUT to ground; see the Recommended Operating Conditions table and the Input and Output Capacitor Selection section. Place the output capacitor as close to output of the device as possible. |
PG | 5 | Output | Power-good output |
Thermal pad | Pad | — | Connect the thermal pad to a large area GND plane for improved thermal performance. |