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Linear & low-dropout (LDO) regulators

LP5912-Q1

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Automotive, 500-mA low-noise low-IQ low-dropout voltage regulator with reverse current protection

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Data sheet

LP5912-Q1

ACTIVE
Data sheet Order now

Product details

Output options Fixed Output Iout (Max) (A) 0.5 Vin (Max) (V) 6.5 Vin (Min) (V) 1.6 Vout (Max) (V) 3.3 Vout (Min) (V) 0.9 Fixed output options (V) 0.9, 1.1, 1.2, 1.5, 1.8, 2.8, 3, 3.3 Noise (uVrms) 12 Iq (Typ) (mA) 0.03 Thermal resistance θJA (°C/W) 71 TI functional safety category Functional Safety-Capable Rating Automotive Load capacitance (Min) (µF) 1 Regulated outputs (#) 1 Features Enable, Output discharge, Power good, Reverse current protection, Soft start Accuracy (%) 3 PSRR @ 100 KHz (dB) 40 Dropout voltage (Vdo) (Typ) (mV) 150 Operating temperature range (C) -40 to 125
Output options Fixed Output Iout (Max) (A) 0.5 Vin (Max) (V) 6.5 Vin (Min) (V) 1.6 Vout (Max) (V) 3.3 Vout (Min) (V) 0.9 Fixed output options (V) 0.9, 1.1, 1.2, 1.5, 1.8, 2.8, 3, 3.3 Noise (uVrms) 12 Iq (Typ) (mA) 0.03 Thermal resistance θJA (°C/W) 71 TI functional safety category Functional Safety-Capable Rating Automotive Load capacitance (Min) (µF) 1 Regulated outputs (#) 1 Features Enable, Output discharge, Power good, Reverse current protection, Soft start Accuracy (%) 3 PSRR @ 100 KHz (dB) 40 Dropout voltage (Vdo) (Typ) (mV) 150 Operating temperature range (C) -40 to 125
WSON (DRV) 6 4 mm² 2 x 2
  • Qualified for Automotive Applications
  • AEC Q100-Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM Classification Level 2
    • Device CDM Classification Level C6
  • Input Voltage Range: 1.6 V to 6.5 V
  • Output Voltage Range: 0.8 V to 5.5 V
  • Output Current up to 500 mA
  • Low Output-Voltage Noise: 12 µVRMS Typical
  • PSRR at 1 kHz: 75 dB Typical
  • Output Voltage Tolerance (VOUT ≥ 3.3 V): ±2%
  • Low IQ (Enabled, No Load): 30 µA Typical
  • Low Dropout (VOUT ≥ 3.3 V): 95 mV Typical at 500-mA Load
  • Stable With 1-µF Ceramic Input and Output Capacitors
  • Thermal-Overload and Short-Circuit Protection
  • Reverse Current Protection
  • No Noise Bypass Capacitor Required
  • Output Automatic Discharge for Fast Turnoff
  • Power-Good Output With 140-µs Typical Delay
  • Internal Soft-Start to Limit the In-rush Current
  • –40°C to +125°C Operating Junction Temperature Range
  • Qualified for Automotive Applications
  • AEC Q100-Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM Classification Level 2
    • Device CDM Classification Level C6
  • Input Voltage Range: 1.6 V to 6.5 V
  • Output Voltage Range: 0.8 V to 5.5 V
  • Output Current up to 500 mA
  • Low Output-Voltage Noise: 12 µVRMS Typical
  • PSRR at 1 kHz: 75 dB Typical
  • Output Voltage Tolerance (VOUT ≥ 3.3 V): ±2%
  • Low IQ (Enabled, No Load): 30 µA Typical
  • Low Dropout (VOUT ≥ 3.3 V): 95 mV Typical at 500-mA Load
  • Stable With 1-µF Ceramic Input and Output Capacitors
  • Thermal-Overload and Short-Circuit Protection
  • Reverse Current Protection
  • No Noise Bypass Capacitor Required
  • Output Automatic Discharge for Fast Turnoff
  • Power-Good Output With 140-µs Typical Delay
  • Internal Soft-Start to Limit the In-rush Current
  • –40°C to +125°C Operating Junction Temperature Range

The LP5912-Q1 is low-noise LDO that can supply up to 500 mA of output current. Designed to meet the requirements of RF and analog circuits, the LP5912-Q1 device provides low noise, high PSRR, low quiescent current, and low line and load transient response. The LP5912-Q1 offers class-leading noise performance without a noise bypass capacitor and with the ability for remote output capacitance placement.

The device is designed to work with a 1-µF input and a 1-µF output ceramic capacitor (no separate noise bypass capacitor required).

This device is available with fixed output voltages from 0.8 V to 5.5 V in 25-mV steps. Contact Texas Instruments Sales for specific voltage option needs.

For all available packages, see the Package Option Addendum (POA) at the end of this data sheet.

The LP5912-Q1 is low-noise LDO that can supply up to 500 mA of output current. Designed to meet the requirements of RF and analog circuits, the LP5912-Q1 device provides low noise, high PSRR, low quiescent current, and low line and load transient response. The LP5912-Q1 offers class-leading noise performance without a noise bypass capacitor and with the ability for remote output capacitance placement.

The device is designed to work with a 1-µF input and a 1-µF output ceramic capacitor (no separate noise bypass capacitor required).

This device is available with fixed output voltages from 0.8 V to 5.5 V in 25-mV steps. Contact Texas Instruments Sales for specific voltage option needs.

For all available packages, see the Package Option Addendum (POA) at the end of this data sheet.

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Technical documentation

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Type Title Date
* Data sheet LP5912-Q1 Automotive 500-mA Low-Noise, Low-IQ LDO datasheet (Rev. C) PDF | HTML 02 Sep 2016
Functional safety information LP5912-Q1 Functional Safety FIT Rate and Failure Mode Distribution 16 Dec 2019
Technical article Power over coax: A design guide for automotive applications 26 Aug 2016
EVM User's guide LP5912DRV EVM User's Guide 15 Dec 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LP5912DRV18EVM — LP5912 1.8-V 500-mA low-noise low-IQ LDO linear regulator evaluation module

The LP5912EVM facilitates evaluation of the LP5912-1.8DRVR Low-Noise, 500mA Linear Regulator with user accessible test points for Enable (EN) and Power Good (PG). The EVM is a standalone evaluation module containing one positive voltage low-dropout regulator IC for fixed voltage regulation (1.8V). (...)

User guide: PDF
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Evaluation board

LP5912DRV33EVM — LP5912 3.3-V 500-mA low-noise low-IQ LDO linear regulator evaluation module

The LP5912EVM facilitates evaluation of the LP5912-3.3DRVR Low-Noise, 500mA Linear Regulator with user accessible test points for Enable (EN) and Power Good (PG). The EVM is a standalone evaluation module containing one positive voltage low-dropout regulator IC for fixed voltage regulation (3.3V). (...)

User guide: PDF
Not available on TI.com
Simulation model

LP5912 0P9 PSpice Transient Model

SNVMAJ1.ZIP (62 KB) - PSpice Model
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Simulation model

LP5912 0P9 Unencrypted PSpice Transient Model

SNVMAJ0.ZIP (3 KB) - PSpice Model
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Simulation model

LP5912 1P1 PSpice Transient Model

SNVMB44.ZIP (63 KB) - PSpice Model
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Simulation model

LP5912 1P1 Unencrypted PSpice Transient Model

SNVMB43.ZIP (3 KB) - PSpice Model
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Simulation model

LP5912 1P2 PSpice Transient Model

SNVMB47.ZIP (63 KB) - PSpice Model
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Simulation model

LP5912 1P2 Unencrypted PSpice Transient Model

SNVMB46.ZIP (3 KB) - PSpice Model
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Simulation model

LP5912 1P5 PSpice Transient Model

SNVMAI7.ZIP (62 KB) - PSpice Model
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Simulation model

LP5912 1P5 Unencrypted PSpice Transient Model

SNVMAI8.ZIP (3 KB) - PSpice Model
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Simulation model

LP5912 1P8 Unencrypted PSpice Transient Model

SNVMAJ4.ZIP (3 KB) - PSpice Model
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Simulation model

LP5912 1P8_PSpice Transient Model

SNVMAI3.ZIP (61 KB) - PSpice Model
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Simulation model

LP5912 2P8 PSpice Transient Model

SNVMAI9.ZIP (62 KB) - PSpice Model
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Simulation model

LP5912 2P8_Unencrypted PSpice Transient Model

SNVMAI2.ZIP (3 KB) - PSpice Model
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Simulation model

LP5912 3P0 PSpice Transient Model

SNVMB42.ZIP (63 KB) - PSpice Model
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Simulation model

LP5912 3P0 Unencrypted PSpice Transient Model

SNVMB45.ZIP (3 KB) - PSpice Model
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Simulation model

LP5912 3P3 PSpice Transient Model

SNVMAJ3.ZIP (59 KB) - PSpice Model
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Simulation model

LP5912 3P3 Unencrypted PSpice Transient Model

SNVMAJ2.ZIP (3 KB) - PSpice Model
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Reference designs

TIDA-01168 —

Bidirectional DC/DC Converter Reference Design for 12-V/48-V Automotive Systems

The TIDA-01168 reference design is a four-phase, bidirectional DC-DC converter development platform for 12-V/48-V automotive systems. The system uses two LM5170-Q1 current controllers and a TMS320F28027F microcontroller (MCU) for the power stage control. LM5170-Q1 subsystems use average current (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP22030 — Efficient, low-heat, CISPR 25 class 5-compliant power reference design for infotainment display

This reference design is focused on the power tree for an automotive infotainment display unit covering various power supply rails including two off-battery converters providing 5.0-V and 3.3-V, and intermediary system rails of 1.8-V and 1.1-V. The test results demonstrate high efficiency, low (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDA-00733 — Automotive 8-Channel Class-D Amplifier with 2.1 MHz Switching Power Supply Reference Design

TIDA-00733 is a reference design for an eight-channel, Class-D amplifier that is capable of driving 2-Ω loads and an off-battery step-down power supply with 5-V and  3.3-V outputs. The amplifier design provides audio inputs for each audio channel. A  high-performance audio (...)
Design guide: PDF
Schematic: PDF
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WSON (DRV) 6 View options

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