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TLV70233DBVR

300mA LDO, 3.3V fixed, 220mV dropout, 68dB PSRR, SOT-23-5

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Manufacturer Part：

TLV70233DBVR

Package：

SOT-23-5 (2.9 x 1.6 x 1.45 mm, 0.95mm pitch)

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Description

Product Overview

The TLV70233DBVR from Texas Instruments is a 300mA low-dropout (LDO) linear regulator with a fixed 3.3V output in a 5-pin SOT-23 package. Featuring 220mV dropout at 300mA, 35µA quiescent current, 68dB PSRR at 1kHz, and 2% output accuracy, it operates from 2V to 5.5V input. Stable with only 0.1µF output capacitance, it includes enable pin, thermal shutdown, and overcurrent protection, making it ideal for battery-powered and noise-sensitive applications.

Key Specifications

Output Voltage 3.3V (Fixed)
Output Current 300 mA (max)
Input Voltage Range 2.0V to 5.5V
Dropout Voltage 220 mV at 300 mA (VOUT = 2.8V)
Quiescent Current 35 µA (typical)
PSRR 68 dB at 1 kHz
Output Voltage Accuracy ±2% (±0.5% typical)
Line Regulation 1 mV
Load Regulation 1 mV
Minimum Output Capacitance 0.1 µF (effective)
Enable Pin Yes
Thermal Shutdown Yes (165°C threshold)
Overcurrent Protection Yes (320 mA min current limit)
Operating Temperature -40°C to +125°C
Package SOT-23-5 (2.9 x 1.6 mm)

Features

  • Very low dropout: 220mV at 300mA (VOUT = 2.8V)
  • Low quiescent current: 35µA typical
  • High PSRR: 68dB at 1kHz
  • 2% output voltage accuracy over temperature
  • Stable with only 0.1µF effective output capacitance
  • Enable pin for ON/OFF control
  • Thermal shutdown and overcurrent protection
  • Available in fixed output voltages from 1.2V to 4.8V
  • Available in SOT-23-5 and 1.5mm x 1.5mm WSON-6 packages

Applications

  • Bluetooth and ZigBee wireless modules
  • WLAN and PC add-on card power
  • Li-Ion battery-powered handheld devices
  • Portable medical and consumer electronics
  • Post-regulation for switching power supplies

The TLV70233DBVR from Texas Instruments is a 300mA low-dropout linear regulator with a fixed 3.3V output in a compact SOT-23-5 package. Operating from 2V to 5.5V input, it features 220mV dropout at 300mA, 35µA quiescent current, 68dB PSRR at 1kHz, and 2% output accuracy. Stable with just 0.1µF output capacitance, it includes an enable pin, thermal shutdown, and overcurrent protection, making it ideal for Bluetooth, ZigBee, and battery-powered portable electronics.

The TLV70233DBVR uses a PMOS pass transistor in a series regulation topology. The error amplifier compares a fraction of the output voltage (through an internal resistor divider set for 3.3V) with an internal precision bandgap reference. The error amplifier output drives the PMOS pass transistor gate to maintain a constant 3.3V output. The low 35µA quiescent current is achieved by biasing the error amplifier and bandgap reference at minimal current while maintaining adequate loop bandwidth for stability. The 68dB PSRR at 1kHz is achieved through the high gain of the error amplifier and the low output impedance of the PMOS pass device, which attenuates input supply ripple. The enable pin controls an internal switch that disconnects the bias circuitry and pass transistor when driven low, reducing supply current to near zero. The dropout voltage of 220mV at 300mA is determined by the RDS(ON) of the PMOS pass transistor. Thermal shutdown activates at approximately 165°C junction temperature, disabling the output to prevent damage, and automatically recovers when the junction cools to 145°C.

Pin Name Type Function
1 IN Power Input supply voltage (2.0V to 5.5V)
2 GND Power Ground
3 EN Input Enable (HIGH = on, LOW = shutdown)
4 NC — No connect
5 OUT Output Regulated 3.3V output
  • Power regulation for Bluetooth and ZigBee wireless modules
  • WLAN and PC add-on card 3.3V supply
  • Li-Ion battery-powered handheld and portable devices
  • Post-regulation after DC-DC converters for noise-sensitive loads
  • Portable medical instrumentation and consumer electronics
Manufacturer Part Number Package Notes
Texas Instruments TLV70233PD_BVT SOT-23-5 With active output discharge
Texas Instruments TLV70233DSE WSON-6 1.5×1.5mm, smaller footprint
Microchip MIC5219-3.3YM5 SOT-23-5 500mA, similar dropout
Diodes Inc AP2112K-3.3 SOT-23-5 600mA, low IQ alternative
Richtek RT9013-33GB SOT-23-5 300mA, pin-compatible
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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