0.602-mm × 0.602-mm power DSBGA
The TPS7A21 is an ultra-small, low-dropout (LDO) linear voltage regulator that can source 500 mA of output current. The device provides low noise, high PSRR, and excellent load and line transient performance to meet the requirements of RF and other sensitive analog circuits. Innovative design techniques result in low-noise performance without the addition of an external noise bypass capacitor. With the device low quiescent current, the TPS7A21 is a good choice for battery-powered systems. The 2.0-V to 6.0-V input voltage range and 0.8-V to 5.5-V output voltage range support a variety of system requirements. The internal precision reference circuit enables excellent accuracy; the maximum output voltage tolerance is 1.5% over load, line, and temperature variations.
An internal soft-start circuit helps control the inrush current, thus minimizing the input voltage drop during start up. The LDO is stable with small ceramic capacitors, allowing for a small overall solution size.
A smart enable input circuit with an internally controlled pulldown resistor keeps the LDO disabled even when the EN pin is unconnected and helps eliminate external components that are otherwise required to pull down the EN input.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS7A21 | YWD (DSBGA, 4) | 0.602 mm × 0.602 mm |
Changes from Revision * (December 2021) to Revision A (September 2022)
PIN | I/O | DESCRIPTION | |
---|---|---|---|
DSBGA | NAME | ||
A1 | IN | I | Input voltage supply. For best transient response and to minimize input impedance, use the recommended value or larger capacitor from IN to GND, as listed in the Section 6.3 table. Place the input capacitor as close to the IN and GND pins of the device as possible. |
A2 | OUT | O | Regulated output voltage. Connect a low-equivalent series resistance (ESR) capacitor to this pin. For best transient response, use the nominal recommended value or larger capacitor from OUT to GND. An internal 150-Ω (typical) pulldown resistor prevents a charge from remaining on OUT when the regulator is in shutdown mode (VEN< VEN(LOW)). |
B1 | EN | I | Enable input. A low voltage (VEN < VEN(LOW)) on this pin turns the regulator off and discharges the output pin to GND through an internal 150-Ω pulldown resistor. A high voltage (VEN > VEN(HI)) on this pin enables the regulator output. This pin has an internal 450-kΩ pulldown resistor to hold the regulator off by default. When VEN > VEN(HI), the 450-kΩ pulldown resistor is disconnected to reduce input current. |
B2 | GND | — | Common ground. |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
VIN | Input voltage | –0.3 | 6.5 | V | |
VOUT | Output voltage | –0.3 | See(2) | V | |
VEN | Enable input voltage | –0.3 | 6.5 | V | |
Maximum output current(4) | Internally limited | A | |||
TJ | Operating junction temperature | -40 | 150 | °C | |
Tstg | Storage temperature | –65 | 150 | °C |