LM25011

AKTIV

Abwärtsregler (Buck) 6−42 V, großer Vin-Bereich, 2 A, konstant aktiv, mit einstellbarer Strombegrenz

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Datenblatt

document-pdfAcrobat LM25011, LM25011-Q1, LM25011A, LM25011A-Q1 42-V 2-A Constant On-Time Switching Regulator With Adjustable Current Limit datasheet (Rev. H) (Englisch) PDF | HTML

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Alternativen vergleichen

Selbe Funktionalität wie der verglichene Baustein bei abweichender Anschlussbelegung

LMR51420

AKTIV

SIMPLE SWITCHER®-Stromwandler mit synchronem Abwärtswandler von 4,5 V auf 36 V, 2 A, 40 µA IQ Smaller footprint in SOT-23 package, integrated compensation and synchronous rectification.

LM25011

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

2

Vin (min) (V)

6

Vin (max) (V)

42

Switching frequency (min) (kHz)

50

Switching frequency (max) (kHz)

2000

Features

Adjustable current limit, Over Current Protection, Power good

Control mode

Constant on-time (COT)

Vout (min) (V)

2.51

Vout (max) (V)

40

Iq (typ) (µA)

1200

Duty cycle (max) (%)

99

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

2

Vin (min) (V)

6

Vin (max) (V)

42

Switching frequency (min) (kHz)

50

Switching frequency (max) (kHz)

2000

Features

Adjustable current limit, Over Current Protection, Power good

Control mode

Constant on-time (COT)

Vout (min) (V)

2.51

Vout (max) (V)

40

Iq (typ) (µA)

1200

Duty cycle (max) (%)

99

HVSSOP (DGQ)

10

14.7 mm² 3 x 4.9

LM25011-Q1 is an Automotive Grade Product that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C Operating Junction Temperature)
LM25011A Allows Low-Dropout Operation at High Switching Frequency
Input Operating Voltage Range: 6 V to 42 V
Absolute Maximum Input Rating: 45 V
Integrated 2-A N-Channel Buck Switch
Adjustable Current Limit Allows for Smaller Inductor
Adjustable Output Voltage from 2.51 V
Minimum Ripple Voltage at V_OUT
Power Good Output
Switching Frequency Adjustable to 2 MHz
COT Topology Features:
- Switching Frequency Remains Nearly Constant with Load Current and Input Voltage Variations
- Ultra-Fast Transient Response
- No Loop Compensation Required
- Stable Operation with Ceramic Output Capacitors
- Allows for Smaller Output Capacitor and Current Sense Resistor
Adjustable Soft-Start Timing
Thermal Shutdown
Precision 2% Feedback Reference
Package: 10-Pin, HVSSOP
Create a Custom Design Using the LM25011 Family with the WEBENCH Power Designer

LM25011-Q1 is an Automotive Grade Product that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C Operating Junction Temperature)
LM25011A Allows Low-Dropout Operation at High Switching Frequency
Input Operating Voltage Range: 6 V to 42 V
Absolute Maximum Input Rating: 45 V
Integrated 2-A N-Channel Buck Switch
Adjustable Current Limit Allows for Smaller Inductor
Adjustable Output Voltage from 2.51 V
Minimum Ripple Voltage at V_OUT
Power Good Output
Switching Frequency Adjustable to 2 MHz
COT Topology Features:
- Switching Frequency Remains Nearly Constant with Load Current and Input Voltage Variations
- Ultra-Fast Transient Response
- No Loop Compensation Required
- Stable Operation with Ceramic Output Capacitors
- Allows for Smaller Output Capacitor and Current Sense Resistor
Adjustable Soft-Start Timing
Thermal Shutdown
Precision 2% Feedback Reference
Package: 10-Pin, HVSSOP
Create a Custom Design Using the LM25011 Family with the WEBENCH Power Designer

The LM25011 constant on-time step-down switching regulator features all the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying up to 2 A of load current. This high-voltage regulator contains an N-Channel Buck switch, a startup regulator, current limit detection, and internal ripple control. The constant on-time regulation principle requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load. The adjustable valley current limit detection results in a smooth transition from constant voltage to constant current mode when current limit is reached, without the use of current limit foldback. The PGD output indicates the output voltage has increased to within 5% of the expected regulation value. Additional features include: Low output ripple, VIN under-voltage lock-out, adjustable soft-start timing, thermal shutdown, gate drive pre-charge, gate drive under-voltage lock-out, and maximum duty cycle limit.

The LM25011A has a shorter minimum off-time than the LM25011, which allows for higher frequency operation at low input voltages.

The LM25011 constant on-time step-down switching regulator features all the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying up to 2 A of load current. This high-voltage regulator contains an N-Channel Buck switch, a startup regulator, current limit detection, and internal ripple control. The constant on-time regulation principle requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load. The adjustable valley current limit detection results in a smooth transition from constant voltage to constant current mode when current limit is reached, without the use of current limit foldback. The PGD output indicates the output voltage has increased to within 5% of the expected regulation value. Additional features include: Low output ripple, VIN under-voltage lock-out, adjustable soft-start timing, thermal shutdown, gate drive pre-charge, gate drive under-voltage lock-out, and maximum duty cycle limit.

The LM25011A has a shorter minimum off-time than the LM25011, which allows for higher frequency operation at low input voltages.

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Technische Dokumentation

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Alle anzeigen 5

	Typ	Titel		Datum
*	Data sheet	LM25011, LM25011-Q1, LM25011A, LM25011A-Q1 42-V 2-A Constant On-Time Switching Regulator With Adjustable Current Limit datasheet (Rev. H)	PDF \| HTML	03 Sep 2014
	White paper	Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A)		10 Apr 2019
	Selection guide	Power Management Guide 2018 (Rev. R)		25 Jun 2018
	White paper	Wide VIN power management ICs simplify white paper (Rev. A)		19 Sep 2013
	EVM User's guide	AN-1965 LM25011 Evaluation Board (Rev. B)		24 Apr 2013

Design und Entwicklung

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Evaluierungsplatine

LM25011MY-EVAL — LM25011 - Evaluierungsmodul für Schaltregler mit breitem Eingangsspannungsbereich

The LM25011EVAL 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 42V. The circuit features an adjustable load current in excess of (...)

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