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TPS78233DDCR

150mA ultra-low Iq (1.3uA) LDO, 3.3V fixed output, 250mV dropout, SOT-23-5 Thin

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Pieza del fabricante：

TPS78233DDCR

Paquete：

SOT-23-5 Thin / TSOT-23-5 (2.9 x 1.6 x 0.9 mm)

Marca：
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Compromiso de calidad
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Descripción

Productos

The TPS78233DDCR from Texas Instruments is an ultra-low quiescent current, low-dropout (LDO) linear regulator providing a fixed 3.3V output at up to 150mA. With a quiescent current of just 1.3uA (typical), it is optimized for battery-powered and always-on applications. The device features a 250mV maximum dropout at full load, enable pin for power sequencing, and integrated active output pull-down for rapid discharge. It is housed in a thin SOT-23-5 package suitable for space-constrained designs.

Especificaciones

Output Voltage 3.3V (Fixed)
Corriente de salida 150mA
Input Voltage Range 2.7V to 5.5V
Dropout Voltage 250mV max @ 150mA
Quiescent Current (Iq) 1.3uA (typical)
PSRR 40dB to 15dB (10Hz to 1kHz)
Enable Pin Active High
Protection Over-current, Over-temperature, Reverse Polarity
Temperatura de funcionamiento -40 to 125°C
Paquete SOT-23-5 Thin (TSOT-23-5)

Características

  • Ultra-low quiescent current of 1.3uA extends battery life
  • 500nA shutdown current for near-zero power in standby
  • Active output pull-down for controlled discharge
  • Stable with no output load (zero-load capability)
  • Enable pin with CMOS-compatible logic levels
  • Over-current, over-temperature, and reverse polarity protection
  • Small SOT-23-5 thin package for compact designs

Aplicaciones

  • Battery-powered IoT and wearable devices
  • Always-on power rails in portable electronics
  • Sensor power supply and signal conditioning
  • Low-power microcontroller voltage regulation
  • Portable medical instruments

The TPS78233DDCR is a member of Texas Instruments’ TPS782 family of ultra-low quiescent current LDO regulators. Designed specifically for battery-operated and always-on systems, this device delivers a fixed 3.3V output at up to 150mA while drawing only 1.3uA of quiescent current. The innovative internal circuit maintains excellent output voltage regulation even under zero-load conditions, addressing a common limitation of traditional PMOS LDOs. The integrated active pull-down rapidly discharges the output when the device is disabled, ensuring predictable power-down behavior. Housed in a thin SOT-23-5 package, the TPS78233DDCR is ideal for space-constrained portable applications.

The TPS78233DDCR uses a PMOS pass transistor to achieve low dropout voltage regulation. The error amplifier compares a fraction of the output voltage (via an internal resistor divider set for 3.3V) with an internal bandgap reference, and adjusts the PMOS gate drive to maintain regulation. The ultra-low quiescent current is achieved through a specialized bias circuit that minimizes operating current while preserving loop stability. An innovative light-load circuit maintains loop gain at zero-load conditions, ensuring regulation without a minimum load requirement. The enable pin (EN) is active-high and compatible with standard CMOS logic. When disabled, an active pull-down circuit discharges the output capacitor to within 5% of VOUT. The device includes built-in over-current, over-temperature, and reverse polarity protection circuits.

Pin Nombre Tipo Función
1 EN Potencia Input voltage supply (2.7V to 5.5V)
2 GND Suelo Referencia del suelo
3 ES Entrada Enable (active high); connect to IN if not used
4 NC - No internal connection
5 OUT Salida Regulated 3.3V output
  • Always-on power rails in battery-powered IoT sensors and wearables
  • Low-dropout regulation for single-cell Li-Ion to 3.3V systems
  • Portable medical devices requiring ultra-low standby power consumption
  • Microcontroller and sensor power supply in wireless metering applications
  • Post-regulation stage after switching converters in noise-sensitive circuits
Fabricante Número de pieza Paquete Notas
TI TPS78228DDCR SOT-23-5 2.8V fixed output variant
TI TPS79933DDCR SOT-23-5 3.3V, 200mA, low noise
Microchip MCP1824T-3302E/OT SOT-23-5 3.3V, 300mA LDO
Richtek RT9013-33GB SOT-23-5 3.3V, 300mA LDO
Diodos Inc AP2112K-3.3 SOT-23-5 3.3V, 600mA LDO
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