TPS7A03

• Ultra-low I_Q: 200 nA (typ), even in dropout
• Shutdown I_Q: 3 nA (typ)
• Excellent transient response (1 mA to 50 mA)
  • < 10-µs settling time
  • 80-mv undershoot
• Packages:
  • 1.0-mm × 1.0-mm X2SON
  • SOT23-5
  • 0.64-mm x 0.64-mm DSBGA (preview)
• Input voltage range: 1.5 V to 6.0 V
• Output voltage range: 0.8 V to 5.0 V (fixed)
• Output accuracy: 1.5% over temperature
• Smart enable pulldown
• Very low dropout:
  • 270 mV (max) at 200 mA (V_OUT = 3.3 V)
• Stable with a 1-µF or larger capacitor

The TPS7A03 is an ultra-small, ultra-low quiescent current low-dropout linear regulator (LDO) that can source 200 mA with excellent transient performance.

The TPS7A03, with an ultra-low I_Q of 200 nA, is designed specifically for applications where very-low quiescent current is a critical parameter. This device maintains low I_Q consumption even in dropout mode to further increase the battery life. When in shutdown or disabled mode, the device consumes ultra-low,
3-nA I_Q that helps increase the shelf life of the battery. The TPS7A03 has an output range of 0.8 V to 5.0 V available in 50-mV steps to support the lower core voltages of modern microcontrollers (MCUs).

The TPS7A03 features a smart enable circuit with an internally controlled pulldown resistor that keeps the LDO disabled even when the EN pin is left floating and helps minimize the external components used to pulldown the EN pin. This circuit also helps minimize the current drawn through the external pulldown circuit when the device is enabled.

The TPS7A03 is fully specified for T_J = –40°C to +125°C operation.