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Linear & low-dropout (LDO) regulators

LP5951

ACTIVE

150-mA, low-IQ, low-dropout voltage regulator with enable

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Data sheet

LP5951

ACTIVE
Data sheet Order now

Product details

Output options Fixed Output Iout (max) (A) 0.15 Vin (max) (V) 5.5 Vin (min) (V) 1.8 Vout (max) (V) 3.7 Vout (min) (V) 1.3 Fixed output options (V) 1.3, 1.5, 1.8, 2, 2.5, 2.8, 3, 3.3, 3.7 Rating Catalog Noise (µVrms) 125 PSRR at 100 KHz (dB) 32 Iq (typ) (mA) 0.029 Thermal resistance θJA (°C/W) 196 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 0.15 Vin (max) (V) 5.5 Vin (min) (V) 1.8 Vout (max) (V) 3.7 Vout (min) (V) 1.3 Fixed output options (V) 1.3, 1.5, 1.8, 2, 2.5, 2.8, 3, 3.3, 3.7 Rating Catalog Noise (µVrms) 125 PSRR at 100 KHz (dB) 32 Iq (typ) (mA) 0.029 Thermal resistance θJA (°C/W) 196 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8 SOT-SC70 (DCK) 5 4.2 mm² 2 x 2.1
  • Input Voltage Range: 1.8 V to 5.5 V
  • Output Voltage Range: 1.3 V to 3.7 V
  • Excellent Line Transient Response: ±2 mV (typical)
  • Excellent PSRR: –60 dB at 1 kHz typical
  • Low Quiescent Current of 29 µA typical
  • Small SC70-5 and SOT-23-5 Packages
  • Fast Turnon Time of 30 µs typ.
  • Typical < 1 nA Quiescent Current in Shutdown
  • Ensured 150-mA Output Current
  • Logic Controlled Enable 0.4 V/0.9 V
  • Good Load Transient Response of 50 mVpp (typical)
  • Thermal Overload and Short-Circuit Protection
  • -40°C to 125°C Junction Temperature Range
  • Input Voltage Range: 1.8 V to 5.5 V
  • Output Voltage Range: 1.3 V to 3.7 V
  • Excellent Line Transient Response: ±2 mV (typical)
  • Excellent PSRR: –60 dB at 1 kHz typical
  • Low Quiescent Current of 29 µA typical
  • Small SC70-5 and SOT-23-5 Packages
  • Fast Turnon Time of 30 µs typ.
  • Typical < 1 nA Quiescent Current in Shutdown
  • Ensured 150-mA Output Current
  • Logic Controlled Enable 0.4 V/0.9 V
  • Good Load Transient Response of 50 mVpp (typical)
  • Thermal Overload and Short-Circuit Protection
  • -40°C to 125°C Junction Temperature Range

The LP5951 regulator is designed to meet the requirements of portable battery-powered systems providing a regulated output voltage and low quiescent current. When switched to shutdown mode via a logic signal at the Enable (EN) pin, the power consumption is reduced to virtually zero.

The LP5951 is designed to be stable with small 1-µF ceramic capacitors. The device also features internal protection against short-circuit currents and over-temperature conditions.

Performance is specified for a –40°C to 125°C temperature range.

The device is available in fixed output voltages in the range of 1.3 V to 3.7 V. For availability, please contact your local TI sales office.

The LP5951 regulator is designed to meet the requirements of portable battery-powered systems providing a regulated output voltage and low quiescent current. When switched to shutdown mode via a logic signal at the Enable (EN) pin, the power consumption is reduced to virtually zero.

The LP5951 is designed to be stable with small 1-µF ceramic capacitors. The device also features internal protection against short-circuit currents and over-temperature conditions.

Performance is specified for a –40°C to 125°C temperature range.

The device is available in fixed output voltages in the range of 1.3 V to 3.7 V. For availability, please contact your local TI sales office.
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Technical documentation

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Type Title Date
* Data sheet LP5951 Micropower, 150-mA Low-Dropout CMOS Voltage Regulator datasheet (Rev. G) PDF | HTML 15 Dec 2014
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
EVM User's guide AN-1486 LP5951 Evaluation Board (Rev. C) 30 Apr 2013

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SOT-23 (DBV) 5 Ultra Librarian
SOT-SC70 (DCK) 5 Ultra Librarian
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