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LM34919C-Q1

ACTIVE

Automotive 4.5-50V Wide Vin 600mA 2.6MHz Ultra-Small Constant On-Time Non-Synchronous Buck Regulator

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Data sheet

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TPS560430-Q1 ACTIVE Automotive qualified SIMPLE SWITCHER® 4-V to 36-V, 600-mA synchronous step-down converter PFM and PWM selectable options in an SOT-23 package.

LM34919C-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.6 Vin (min) (V) 4.5 Vin (max) (V) 50 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2600 Features Enable, Power good, Soft Start Adjustable Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 45 Iq (typ) (µA) 2200 Duty cycle (max) (%) 99
Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.6 Vin (min) (V) 4.5 Vin (max) (V) 50 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2600 Features Enable, Power good, Soft Start Adjustable Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 45 Iq (typ) (µA) 2200 Duty cycle (max) (%) 99
DSBGA (YZR) 12 3.9375 mm² 2.25 x 1.75 WSON (DNT) 12 16 mm² 4 x 4
  • AEC-Q100 qualified (Tj = –40°C to 125°C)
  • Maximum Switching Frequency: 2.6 MHz
  • Input Voltage Range: 4.5 V to 50 V
  • Integrated N-Channel buck switch
  • Integrated Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with
    Load Current and Input Voltage
  • Adjustable Output Voltage
  • Power Good Output
  • Enable Input
  • Valley Current Limit at 0.64 A Typical
  • Precision Internal Voltage Reference
  • Low IQ Shutdown (<10 µA)
  • Highly Efficient Operation
  • Thermal Shutdown
  • 12-Bump 2 mm × 2 mm DSBGA and 12-pin 4
    mm × 4 mm WSON Packages
  • AEC-Q100 qualified (Tj = –40°C to 125°C)
  • Maximum Switching Frequency: 2.6 MHz
  • Input Voltage Range: 4.5 V to 50 V
  • Integrated N-Channel buck switch
  • Integrated Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with
    Load Current and Input Voltage
  • Adjustable Output Voltage
  • Power Good Output
  • Enable Input
  • Valley Current Limit at 0.64 A Typical
  • Precision Internal Voltage Reference
  • Low IQ Shutdown (<10 µA)
  • Highly Efficient Operation
  • Thermal Shutdown
  • 12-Bump 2 mm × 2 mm DSBGA and 12-pin 4
    mm × 4 mm WSON Packages

The LM34919C Step Down Switching Regulator features all of the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying 0.6 A to the load. This buck regulator contains an N-Channel Buck Switch and is available in DSBGA and WSON packages. The constant on-time feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: Power Good, enable, VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter.

The LM34919C Step Down Switching Regulator features all of the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying 0.6 A to the load. This buck regulator contains an N-Channel Buck Switch and is available in DSBGA and WSON packages. The constant on-time feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: Power Good, enable, VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter.
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Type Title Date
* Data sheet LM34919C-Q1 Ultra Small 50V, 600mA Const On-Time Buck Switchg Reg datasheet (Rev. A) 12 Dec 2013
User guide LM34919C Evaluation Board User's Guide 03 Sep 2013

Design & development

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

Evaluation board

LM34919CQSDEVM — LM34919C-Q1 50V, 600 mA Wide Vin Constant On-Time Buck Switching Regulator Evaluation Module

The LM34919CQSDEVM evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 3.3V output over an input range of 4.5V to 50V. The circuit delivers load currents to 600 mA, with (...)

User guide: PDF
Not available on TI.com
Evaluation board

LM34919CQTLEVM — LM34919C-Q1 50V, 600 mA Wide Vin Constant On-Time Buck Switching Regulator Evaluation Module

The LM34919CQTLEVM evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 3.3V output over an input range of 4.5V to 50V. The circuit delivers load currents to 600 mA, with (...)

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

LM34919C-Q1 PSpice Transient Model (Rev. A)

SNVM638A.ZIP (63 KB) - PSpice Model
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Simulation model

LM34919C-Q1 Unencrypted PSpice Transient Model (Rev. A)

SNVM979A.ZIP (3 KB) - PSpice Model
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Design guide: PDF
Schematic: PDF
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The reference design is an automotive camera module solution with Aptina image sensor and processor, and TI FPD-Link III serializer. The module features the AR0132AT 1.2Mp image sensor, the AP0101AT image signal processor (ISP) from Aptina, and the LM34919C, TPS62231 buck regulator and (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
DSBGA (YZR) 12 Ultra Librarian
WSON (DNT) 12 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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