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TPS70933DBVR

150mA 3.3V LDO, 1uA IQ, SOT-23-5, 2.7-30V, reverse current protect, 150nA shutdown

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Pieza del fabricante：

TPS70933DBVR

Paquete：

SOT-23-5 (2.90 x 1.60 x 1.20 mm, DBV package)

Marca：
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Descripción

Productos

The TPS70933DBVR from Texas Instruments is a 150mA, 3.3V fixed-output ultra-low IQ LDO regulator in a SOT-23-5 package. With 1uA quiescent current and reverse current protection, it is designed for always-on battery-powered systems requiring minimal standby power.

Especificaciones

Output Voltage 3.3 V fixed (+/-2% over temperature)
Corriente de salida 150 mA (200 mA peak)
Input Voltage 2.7 V to 30 V
Corriente de reposo 1 uA typical
Shutdown Current 150 nA typical
Dropout Voltage 300 mV typical at 150mA
PSRR 80 dB at 10Hz-1kHz
Temperatura de funcionamiento -40C to +125C

Características

  • 1uA ultra-low quiescent current for always-on battery-powered systems
  • 150nA shutdown current when EN pin is pulled low
  • 2.7V to 30V wide input voltage range for versatile supply configurations
  • Reverse current protection prevents current flow from output to input
  • Enable pin with 150nA shutdown current for power gating
  • 80dB PSRR at low frequency for clean RF-sensitive supply

Aplicaciones

  • Always-on battery-powered system 3.3V supply with 1uA IQ
  • IoT and wireless sensor node power with 30V input capability
  • RF power supply with 80dB PSRR for noise-sensitive applications
  • Post-regulation in multi-rail power systems with reverse current blocking

The TPS70933DBVR from Texas Instruments is a 150mA, 3.3V fixed-output ultra-low quiescent current LDO voltage regulator in a SOT-23-5 package. The 1uA typical quiescent current makes this device ideal for always-on battery-powered systems where standby power consumption must be minimized. The 150nA typical shutdown current when the EN pin is pulled low further extends battery life during system sleep modes. The wide 2.7V to 30V input voltage range supports direct operation from single-cell Li-Ion batteries (2.7V minimum) through multi-cell packs and automotive 12V/24V supplies. The reverse current protection feature prevents current from flowing from the output back to the input when the input voltage drops below the output voltage, eliminating the need for an external blocking diode. The PMOS pass transistor topology provides the low 300mV typical dropout voltage at 150mA output. The 80dB PSRR at low frequency (10Hz to 1kHz) ensures a clean output supply for noise-sensitive RF and precision analog circuits. The device is stable with small ceramic output capacitors (1.5uF minimum for VOUT >= 1.5V). Internal protection features include current limiting and thermal shutdown.

The TPS70933DBVR uses a PMOS pass transistor LDO topology with reverse current protection. (1) PMOS Pass Element: The P-channel MOSFET connects between input and output. The PMOS device provides low dropout operation because the gate drive only needs to exceed the threshold voltage, not the output voltage as in NPN-pass regulators. The dropout voltage is approximately RDS(ON) x IOUT. (2) Ultra-Low IQ: The internal bias circuit is designed to consume only 1uA of ground pin current at no load. The precision bandgap reference and error amplifier are optimized for low power consumption while maintaining 2% output voltage accuracy over temperature. (3) Reverse Current Protection: An internal comparator monitors the input-to-output voltage differential. When the output voltage exceeds the input voltage (which would forward-bias the PMOS body diode), the reverse current protection circuit turns off the pass transistor, preventing current flow from output to input. This eliminates the need for an external blocking diode in battery backup applications. (4) Enable and Shutdown: When the EN pin is pulled below the threshold (0.4V typical), the device enters shutdown mode, turning off the pass transistor and reducing the supply current to 150nA. Floating or pulling EN high enables normal operation. (5) Current Limit: Internal current limiting activates at approximately 200mA, protecting the device during fault conditions.

Pin Nombre Tipo Función
1 OUT Salida Regulated 3.3V output
2 GND Suelo Suelo
3 ES Entrada Enable (high=on, low=shutdown)
4 NC - No connection
5 EN Potencia Input supply (2.7-30V)
  • Always-on battery-powered system 3.3V supply with 1uA IQ for extended battery life
  • IoT and wireless sensor node power with 30V input capability and 150nA shutdown
  • RF power supply with 80dB PSRR for noise-sensitive applications in SOT-23-5
  • Post-regulation in multi-rail power systems with reverse current blocking protection
Fabricante Número de pieza Paquete Notas
TI TPS70933DBVT SOT-23-5 Small tape and reel
TI TPS70933DSER WSON-6 Better thermal, same function
TI TPS7A0233DBVR SOT-23-5 25uA IQ, lower noise
Richtek RT9013-33GB SOT-23-5 300mA, higher IQ
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