Texas Instruments LP2985A Low-Dropout (LDO) Voltage Regulator

Texas Instruments LP2985A Low-Dropout (LDO) Voltage Regulators are fixed-output, wide-input, low-noise, low-dropout voltage regulators supporting an input voltage range from 2.5V to 16V and up to 150mA of load current. The LP2985A supports an output range of 1.2V to 5.0V (LP2985-xxyyzM3). Additionally, the LP2985A (LP2985-xxyyzM3) has a 1% output accuracy across the load and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.

Low output noise of 30µV_RMS (with 10nF bypass capacitors) and wide bandwidth PSRR performance of greater than 70dB at 1kHz and 40dB at 1MHz help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering. The internal soft-start time and current limit protection reduce inrush current during start-up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The Texas Instruments LP2985A comes in a 5-pin 2.9mm × 1.6mm SOT-23 (DBV) package.

Features

• 2.5V to 16V V_IN range (LP2985-xxyyzM3)
• 1.2V to 5.0V (fixed, 100mV steps) V_OUT range (LP2985-xxyyzM3)
• V_OUT accuracy
  • ±1% for A-grade (LP2652-xxyyz)
  • ±1.5% for standard-grade (LP2652-xxyyz)
  • ±0.5% for LP2985-xxyyzM3
• ±1% output accuracy over load and temperature for new chip
• Up to 150mA output current
• 71µA at I_LOAD = 0mA low I_Q (LP2985-xxyyzM3)
• 750µA at I_LOAD = 150mA low I_Q (LP2985-xxyyzM3)
• Shutdown current
  • 0.01µA (Typ.) for LP2652-xxyyz
  • 1.12µA (Typ.) for LP2985-xxyyzM3
• 30µV_RMS low noise with 10nF bypass capacitor
• Output current limiting and thermal protection
• Stable with 2.2µF ceramic capacitors
• High PSRR (70dB at 1kHz, 40dB at 1MHz)
• –40°C to +125°C operating junction temperature
• 5-pin SOT-23 (DBV) package

Block Diagram

more information: https://www.ti.com/product/LP2985A

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