The TPS7A19 is a low-dropout linear regulator (LDO) with a wide input voltage (VIN) range up to 40 V, capable of sourcing high output current (IOUT) up to 450 mA. This voltage regulator is ideal for generating a low-voltage supply from wide input-voltage rails. Not only does the TPS7A19 supply a well-regulated voltage rail, but the device also withstands and maintains regulation during voltage transients by acting as a simple surge protection circuit.
The TPS7A19 consumes only 15 µA of quiescent current (IQ) at light loads, thereby lowering the power consumption for always-on or battery-powered applications.
The TPS7A19 features integrated thermal shutdown and overcurrent protection. The TPS7A19 also offers a power good output (PG) with a programmable delay that indicates when the output voltage is in regulation. This feature is useful for power-rail sequencing functions.
This LDO is available in a small, 3-mm × 3-mm, thermally-enhanced, 8-pin SON package.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS7A19 | SON (8) | 3.00 mm × 3.00 mm |
Changes from * Revision (May 2016) to A Revision
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
DELAY | 1 | — | Delay pin. Connect a capacitor to GND to adjust the PG delay time; leave open if the PG function is not needed. |
EN | 6 | I | Enable pin. This pin turns the regulator on or off. If VEN ≥ VEN_HI, the regulator is enabled. If VEN ≤ VEN_LO, the regulator is disabled. If not used, the EN pin can be connected to IN. |
FB | 3 | I | Feedback pin. The feedback pin is the input to the control-loop error amplifier. |
GND | 4,5 | — | Ground pin. |
IN | 7 | I | Regulator input supply pin. |
OUT | 2 | O | Regulator output pin. When the output voltage is larger than 2.5 V, connect a 10-μF to 500-μF ceramic capacitor with an equivalent series resistance (ESR) from 0.001 to 20 Ω to assure stability. When the output voltage is from 1.5 V to 2.5 V, the minimum, stable capacitor value should be 22 μF. |
PG | 8 | O | Power good. This open-drain pin must be connected to VOUT through an external resistor. PG is pulled low when the output voltage goes below threshold. |
Thermal pad | — | Solder to printed-circuit-board (PCB) to enhance thermal performance. Although the thermal pad can be left floating, connect the thermal pad to the ground plane for optimal performance. |