LM2734-Q1

ACTIVE

3 to 20 V input, 1 A, automotive step-down converter with light load efficiency

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TPS629210-Q1 ACTIVE Automotive 3-V to 17-V, 1-A, high-efficiency and low-IQ, synchronous buck converter in SOT-583 Higher efficiency with lower IQ and wider VIN in a smaller package.

Product details

Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 3 Vin (max) (V) 20 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 1900 Features Enable, Light Load Efficiency, Over Current Protection Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 18 Iq (typ) (µA) 2100 Duty cycle (max) (%) 96
Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 3 Vin (max) (V) 20 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 1900 Features Enable, Light Load Efficiency, Over Current Protection Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 18 Iq (typ) (µA) 2100 Duty cycle (max) (%) 96
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: -40°C to +125°C, TA
  • Thin SOT-6 Package
  • 3-V to 20-V Input Voltage Range
  • 0.8-V to 18-V Output Voltage Range
  • 1-A Output Current
  • 550-kHz (LM2734Y) and 1.6-MHz (LM2734X) Switching Frequencies
  • 300-mΩ NMOS Switch
  • 30-nA Shutdown Current
  • 0.8-V, 2% Internal Voltage Reference
  • Internal Soft Start
  • Current-Mode, PWM Operation
  • Thermal Shutdown
  • Create a Custom Design Using the LM2734-Q1 With WEBENCH® Power Designer
  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: -40°C to +125°C, TA
  • Thin SOT-6 Package
  • 3-V to 20-V Input Voltage Range
  • 0.8-V to 18-V Output Voltage Range
  • 1-A Output Current
  • 550-kHz (LM2734Y) and 1.6-MHz (LM2734X) Switching Frequencies
  • 300-mΩ NMOS Switch
  • 30-nA Shutdown Current
  • 0.8-V, 2% Internal Voltage Reference
  • Internal Soft Start
  • Current-Mode, PWM Operation
  • Thermal Shutdown
  • Create a Custom Design Using the LM2734-Q1 With WEBENCH® Power Designer

The LM2734-Q1 regulator is a monolithic, high-frequency, PWM step-down DC/DC converter in a 6-pin Thin SOT package. The device provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components and online design support through WEBENCH, the LM2734-Q1 regulator is easy to use. The ability to drive 1-A loads with an internal 300-mΩ NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in the best power density available. The world-class control circuitry allows for on-times as low as 13 ns, thus supporting exceptionally high-frequency conversion over the entire 3-V to 20-V input operating range down to the minimum output voltage of 0.8 V. Switching frequency is internally set to 550 kHz (LM2734Y) or 1.6 MHz (LM2734X), allowing the use of extremely small surface-mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External shutdown is included, featuring an ultra-low standby current of 30 nA.

The LM2734-Q1 regulator uses current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltage protection.

The LM2734-Q1 regulator is a monolithic, high-frequency, PWM step-down DC/DC converter in a 6-pin Thin SOT package. The device provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components and online design support through WEBENCH, the LM2734-Q1 regulator is easy to use. The ability to drive 1-A loads with an internal 300-mΩ NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in the best power density available. The world-class control circuitry allows for on-times as low as 13 ns, thus supporting exceptionally high-frequency conversion over the entire 3-V to 20-V input operating range down to the minimum output voltage of 0.8 V. Switching frequency is internally set to 550 kHz (LM2734Y) or 1.6 MHz (LM2734X), allowing the use of extremely small surface-mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External shutdown is included, featuring an ultra-low standby current of 30 nA.

The LM2734-Q1 regulator uses current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltage protection.

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Technical documentation

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Type Title Date
* Data sheet LM2734-Q1 Thin SOT 1-A Load Step-Down DC/DC Regulator datasheet PDF | HTML 25 Sep 2018
User guide LM2734 Step-Down Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 17 Dec 2021
User guide High-IF Sub-sampling Receiver Subsystem User Guide 27 Jan 2012
Application note Advanced Topics in Powering FPGAs 22 Mar 2007
Application note Power Management Considerations for FPGAs and ASICs 22 Mar 2007

Design & development

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

Evaluation board

LM2734X-EVAL — Thin SOT23 1A Load Step-Down DC-DC Regulator Evaluation Module

LM2734 Thin SOT-23 1A Load Step-Down DC-DC Regulator

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

LM2734X PSpice Average Model (Rev. A)

SNVM136A.ZIP (51 KB) - PSpice Model
Simulation model

LM2734X PSpice Transient Model

SNVM149.ZIP (201 KB) - PSpice Model
Simulation model

LM2734X Unencrypted PSpice Average Model

SNVM836.ZIP (1 KB) - PSpice Model
Simulation model

LM2734X Unencrypted PSpice Transient Model

SNVM835.ZIP (2 KB) - PSpice Model
Simulation model

LM2734Y PSpice Average Model (Rev. A)

SNVM098A.ZIP (51 KB) - PSpice Model
Simulation model

LM2734Y PSpice Transient Model

SNVM100.ZIP (195 KB) - PSpice Model
Simulation model

LM2734Y Unencrypted PSpice Average Model

SNVM834.ZIP (1 KB) - PSpice Model
Simulation model

LM2734Y Unencrypted PSpice Transient Model

SNVM837.ZIP (2 KB) - PSpice Model
Package Pins CAD symbols, footprints & 3D models
SOT-23-THN (DDC) 6 Ultra Librarian

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