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AC/DC & DC/DC converters (integrated FET)

LM34919C-Q1

AKTIV

Nicht synchroner Abwärtsregler für die Automobilindustrie, großer Vin-Bereich von 4,5 bis 50 V, 600 

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Datenblatt

Eine neuere Version dieses Produkts ist verfügbar

open-in-new Alternativen vergleichen
Gleiche Funktionalität, andere Pinbelegung als verglichener Baustein
TPS560430-Q1 AKTIV Für Automobilanwendungen zugelassener synchroner SIMPLE SWITCHER®-Abwärtswandler, 4 bis 36 V, 600 mA PFM and PWM selectable options in an SOT-23 package.

LM34919C-Q1

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Iout (max) (A) 0.6 Vin (min) (V) 4.5 Vin (max) (V) 50 Topology Buck Type Converter 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 Rating Automotive Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0022
Iout (max) (A) 0.6 Vin (min) (V) 4.5 Vin (max) (V) 50 Topology Buck Type Converter 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 Rating Automotive Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0022
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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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM34919C-Q1 Ultra Small 50V, 600mA Const On-Time Buck Switchg Reg datasheet (Rev. A) 12 Dez 2013
User guide LM34919C Evaluation Board User's Guide 03 Sep 2013

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LM34919CQSDEVM — LM34919C-Q1 50 V, 600 mA, Schaltregler mit großem Vin und konstanter Einschaltdauer – Evaluierungsmo

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 (...)

Benutzerhandbuch: PDF
Nicht verfügbar auf TI.com
Evaluierungsplatine

LM34919CQTLEVM — LM34919C-Q1 Evaluierungsmodul für Abwärts-Schaltregler mit breitem Eingangsspannungsbereich 50 V, 60

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 (...)

Benutzerhandbuch: PDF
Nicht verfügbar auf TI.com
Simulationsmodell

LM34919C-Q1 PSpice Transient Model (Rev. A)

SNVM638A.ZIP (63 KB) - PSpice Model
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Simulationsmodell

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

SNVM979A.ZIP (3 KB) - PSpice Model
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Referenzdesigns

TIDA-00223 — Referenzdesign für Audioverstärker der Klasse D I2S über Koaxialkabel für die Automobilindustrie

This reference design is an I²S/TDM-based, low-cost, easy-to-use alternative to fiber optics/analog copper wire for connecting an automotive (sound) control panel to an output stage/power amplifier. Supporting I²S as well as TDM, it is capable of transmitting digital audio signal to 16 (...)
Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-00098 — Referenzdesign für Aptina™-Fahrzeugkameramodul

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
Schaltplan: PDF
Referenzdesigns

PMP9300 — Stromversorgungslösung für Aptina-Bildsensor in Fahrzeugkameramodulen – Referenzdesign

The reference design provides a compact power solution (20x20mm board size) for the Aptina AR0132 image sensor in automotive camera modules. The design comes with a power supply board and a filter board. The power board has two sync-buck regulators, LM34919C and TPS62231, to provide 1.8V and 2.8V (...)
Test report: PDF
Schaltplan: PDF
Gehäuse Pins Herunterladen
DSBGA (YZR) 12 Optionen anzeigen
WSON (DNT) 12 Optionen anzeigen
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Bestellen & Qualität

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