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TLV70033DDCR

200mA LDO, 3.3V fixed, 31uA IQ, 68dB PSRR, SOT-23-5, enable pin

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Manufacturer Part：

TLV70033DDCR

Package：

SOT-23-5 (DDC) 2.9 x 1.6 mm

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Description

Product Overview

The TLV70033DDCR from Texas Instruments is a 200 mA, high-PSRR, low-IQ low-dropout linear regulator with an enable pin. It provides a fixed 3.3V output from a 2.0V to 5.5V input with only 31 uA quiescent current, 68 dB PSRR at 1 kHz, and 175 mV dropout voltage at full load. Stable with only 0.1 uF output capacitance, it comes in a compact SOT-23-5 package.

Key Specifications

Output Voltage 3.3V fixed
Output Current 200 mA
Input Voltage 2.0V to 5.5V
Dropout Voltage 85 mV at 100 mA, 175 mV at 200 mA
Quiescent Current 31 uA (typical)
PSRR 68 dB at 1 kHz
Output Noise 48 uVRMS
Accuracy +/-2%
Output Capacitor Stable with 0.1 uF effective capacitance
Operating Temperature -40°C to +125°C
Package SOT-23-5 (DDC), 2.9 x 1.6 mm

Features

  • Very low dropout: 43 mV at 50 mA, 175 mV at 200 mA
  • Low 31 uA quiescent current
  • High 68 dB PSRR at 1 kHz for noise-sensitive applications
  • +/-2% output voltage accuracy
  • Stable with only 0.1 uF effective output capacitance
  • Enable pin for power sequencing
  • Thermal shutdown and overcurrent protection

Applications

  • Battery-powered handheld devices
  • RF and wireless module power supply
  • Portable medical equipment
  • ADC/DAC reference voltage regulation
  • Wearable electronics

The TLV70033DDCR is a 200 mA low-dropout linear regulator from Texas Instruments designed for power-sensitive portable applications. The device features ultra-low 31 uA quiescent current, excellent line and load transient performance, and very high 68 dB PSRR at 1 kHz. A precision bandgap and error amplifier provides overall +/-2% accuracy. Low output noise and very high PSRR with minimal input-output headroom make this device ideal for RF-powered portable equipment and as a second-stage regulator following a switching converter. The device is stable with an effective output capacitance of only 0.1 uF, enabling the use of cost-effective capacitors with higher bias voltage derating. All versions include thermal shutdown and current limit for safety.

The TLV70033DDCR uses a PMOS pass transistor to achieve low dropout voltage. When the input-output differential is less than the dropout voltage, the PMOS device operates in the linear region and behaves as a resistor (RDS(on)). The error amplifier compares a fraction of the output voltage (via an internal resistor divider) with an internal bandgap reference and drives the PMOS gate to regulate the output. The enable (EN) pin is active-high and TTL-CMOS compatible; when disabled, the output is turned off. Internal current limit protects the device during fault conditions, and a thermal shutdown circuit disables the output when junction temperature exceeds approximately 160°C. The device also includes undervoltage lockout (UVLO) to keep the output off until internal circuitry is operating properly.

Pin Name Type Function
1 IN Power Input voltage (2.0V to 5.5V)
2 GND Ground Ground
3 EN Input Enable (active high, tie to IN for always-on)
4 NC — No connect
5 OUT Output Regulated 3.3V output, up to 200 mA
  • RF module power: 68dB PSRR and 48uVRMS noise for clean RF transceiver supply rails
  • ADC reference regulation: 2% accuracy and low noise for precision measurement systems
  • Wearable devices: 31uA IQ extends battery life in always-on sensor modules
  • Portable medical: Low dropout enables regulation from single Li-ion cell to 3.3V
  • Second-stage LDO: Cascaded after DC-DC converter for ultra-clean output rail
Manufacturer Part Number Package Notes
TI TLV71333PDBVR SOT-23-5 150mA, no capacitor required, active discharge
TI LP5907MFX-3.3 SOT-23-5 250mA, 12uA IQ, 90dB PSRR
ONsemi NCP511SN33T1G SOT-23-5 150mA, 40uA IQ, 3.3V fixed
Microchip MIC5219-3.3YM5-TR SOT-23-5 500mA, low noise, enable
RIC RP114N331D-TR-FE SOT-23-5 150mA, 35uA IQ, 3.3V
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