LM34919

AKTIV

Nicht synchroner Abwärtsregler, 2 x 1,5 mm, großer Eingangsspannungsbereich von 8-40 V, 600 mA, Cons

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Datenblatt

document-pdfAcrobat LM34919 Ultra Small 40V, 600 mA Constant On-Time Buck Switching Regulator datasheet (Rev. E) (Englisch)

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Alternativen vergleichen

Selbe Funktionalität wie der verglichene Baustein bei abweichender Anschlussbelegung

LMR33610

AKTIV

Synchroner Abwärtswandler SIMPLE SWITCHER®, 3,8 bis 36 V, 1 A, in Gehäuse SOIC-8 Smaller footprint, higher efficiency, lower IQ and lower EMI.

LM34919

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

0.6

Vin (min) (V)

8

Vin (max) (V)

40

Switching frequency (min) (kHz)

50

Switching frequency (max) (kHz)

2000

Features

Enable, Over Current Protection

Control mode

Constant on-time (COT)

Vout (min) (V)

2.5

Vout (max) (V)

35

Iq (typ) (µA)

500

Duty cycle (max) (%)

98

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

0.6

Vin (min) (V)

8

Vin (max) (V)

40

Switching frequency (min) (kHz)

50

Switching frequency (max) (kHz)

2000

Features

Enable, Over Current Protection

Control mode

Constant on-time (COT)

Vout (min) (V)

2.5

Vout (max) (V)

35

Iq (typ) (µA)

500

Duty cycle (max) (%)

98

DSBGA (YPA)

10

3.9375 mm² 2.25 x 1.75

Integrated N-Channel buck switch
Integrated start-up regulator
Input Voltage Range: 8V to 40V
No loop compensation required
Ultra-Fast transient response
Operating frequency remains constant with load current and input voltage
Maximum switching frequency: 2.0 MHz
Maximum Duty Cycle Limited During Start-Up
Adjustable output voltage
Valley Current Limit At 0.64A
Precision internal reference
Low bias current
Highly efficient operation
Thermal shutdown
10-Pin DSBGA Package

Integrated N-Channel buck switch
Integrated start-up regulator
Input Voltage Range: 8V to 40V
No loop compensation required
Ultra-Fast transient response
Operating frequency remains constant with load current and input voltage
Maximum switching frequency: 2.0 MHz
Maximum Duty Cycle Limited During Start-Up
Adjustable output voltage
Valley Current Limit At 0.64A
Precision internal reference
Low bias current
Highly efficient operation
Thermal shutdown
10-Pin DSBGA Package

The LM34919 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 0.6A to the load. This buck regulator contains an N-Channel Buck Switch, and is available in a 10-pin DSBGA package. 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: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

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Technische Dokumentation

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Alle anzeigen 3

	Typ	Titel	Datum
*	Data sheet	LM34919 Ultra Small 40V, 600 mA Constant On-Time Buck Switching Regulator datasheet (Rev. E)	19 Feb 2013
	Selection guide	Power Management Guide 2018 (Rev. R)	25 Jun 2018
	EVM User's guide	AN-1650 LM34919 Evaluation Board (Rev. A)	25 Apr 2013

Design und Entwicklung

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Evaluierungsplatine

LM34919EVAL — LM34919-Evaluierungsmodul für Abwärts-Schaltregler mit breitem Eingangsspannungsbereich und konstant

The LM34919 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 5V output over an input range of 8V to 40V. The circuit delivers load currents to 600 mA, with current limit (...)

Benutzerhandbuch: PDF