LM5005

AKTIV

Asynchroner Abwärtsregler (Buck), 7−75 V, großer Vin-Bereich, 2,5 A, Strommodus

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Datenblatt

document-pdfAcrobat LM5005 75-V, 2.5-A Step-Down Switching Regulator With Wide Input Voltage Range datasheet (Rev. E) (Englisch) PDF | HTML

LM5005

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

2.5

Vin (min) (V)

7

Vin (max) (V)

75

Switching frequency (min) (kHz)

50

Switching frequency (max) (kHz)

500

Features

Enable, Frequency synchronization, Over Current Protection

Control mode

current mode

Vout (min) (V)

1.23

Vout (max) (V)

70

Iq (typ) (µA)

3000

Duty cycle (max) (%)

99

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

2.5

Vin (min) (V)

7

Vin (max) (V)

75

Switching frequency (min) (kHz)

50

Switching frequency (max) (kHz)

500

Features

Enable, Frequency synchronization, Over Current Protection

Control mode

current mode

Vout (min) (V)

1.23

Vout (max) (V)

70

Iq (typ) (µA)

3000

Duty cycle (max) (%)

99

HTSSOP (PWP)

20

41.6 mm² 6.5 x 6.4

High-Efficiency DC-DC Buck Converter
- Wide Input Voltage Range From 7 V to 75 V
- Adjustable Output Voltage as Low as 1.225 V
- Output Current as High as 2.5 A
- Junction Temperature Range –40°C to 125°C
Integrated 75-V, 160-mΩ Buck MOSFET
Meets EN55022 and CISPR 22 EMI Standards
±1.5% Feedback Voltage Accuracy
Emulated Peak Current-Mode Control
- Ultra-Fast Line and Load Transient Response
Switching Frequency From 50 kHz to 500 kHz
Master or Slave Frequency Synchronization Input
80-ns Minimum PWM ON Time For Low V_OUT
Monotonic Start-up into Prebiased Output
Internal High-Voltage VCC Bias Supply Regulator
Auxiliary Bias Supply Option to VCC
Configurable Soft Start With Tracking
Precision Standby and Shutdown Input
- Programmable Input UVLO With Hysteresis
Remote Shutdown and Standby Control
Cycle-by-Cycle Overcurrent Protection
VCC and Gate Drive UVLO Protection
Thermal Shutdown Protection With Hysteresis
Thermally-Enhanced 20-Pin HTSSOP Package

High-Efficiency DC-DC Buck Converter
- Wide Input Voltage Range From 7 V to 75 V
- Adjustable Output Voltage as Low as 1.225 V
- Output Current as High as 2.5 A
- Junction Temperature Range –40°C to 125°C
Integrated 75-V, 160-mΩ Buck MOSFET
Meets EN55022 and CISPR 22 EMI Standards
±1.5% Feedback Voltage Accuracy
Emulated Peak Current-Mode Control
- Ultra-Fast Line and Load Transient Response
Switching Frequency From 50 kHz to 500 kHz
Master or Slave Frequency Synchronization Input
80-ns Minimum PWM ON Time For Low V_OUT
Monotonic Start-up into Prebiased Output
Internal High-Voltage VCC Bias Supply Regulator
Auxiliary Bias Supply Option to VCC
Configurable Soft Start With Tracking
Precision Standby and Shutdown Input
- Programmable Input UVLO With Hysteresis
Remote Shutdown and Standby Control
Cycle-by-Cycle Overcurrent Protection
VCC and Gate Drive UVLO Protection
Thermal Shutdown Protection With Hysteresis
Thermally-Enhanced 20-Pin HTSSOP Package

The LM5005 high-voltage buck converter features all of the functions necessary to implement an efficient high-voltage switching regulator with a minimum number of external components. This easy-to-use converter operates over an input voltage range from 7 V to 75 V and delivers a maximum output current of 2.5 A. The control loop architecture is based upon current-mode control using an emulated current ramp for high noise immunity. Current-mode control provides inherent line feed-forward, cycle-by-cycle overcurrent protection and straightforward loop compensation. The use of an emulated control ramp reduces noise sensitivity of the PWM circuit, allowing reliable control of small duty cycles necessary in high input voltage applications.

The switching frequency is resistor-programmable from 50 kHz to 500 kHz. To reduce EMI, an oscillator synchronization pin allows multiple LM5005 regulators to self-synchronize or be synchronized to an external clock signal. Additional protection features include configurable soft start, external power supply tracking, thermal shutdown with automatic recovery, and remote shutdown capability.

The LM5005 is available in an 20-pin HTSSOP package with an exposed pad that is soldered to the PCB to achieve a low junction-to-board thermal impedance. To create a custom regulator design, use the LM5005 with WEBENCH^® Power Designer.

The LM5005 high-voltage buck converter features all of the functions necessary to implement an efficient high-voltage switching regulator with a minimum number of external components. This easy-to-use converter operates over an input voltage range from 7 V to 75 V and delivers a maximum output current of 2.5 A. The control loop architecture is based upon current-mode control using an emulated current ramp for high noise immunity. Current-mode control provides inherent line feed-forward, cycle-by-cycle overcurrent protection and straightforward loop compensation. The use of an emulated control ramp reduces noise sensitivity of the PWM circuit, allowing reliable control of small duty cycles necessary in high input voltage applications.

The switching frequency is resistor-programmable from 50 kHz to 500 kHz. To reduce EMI, an oscillator synchronization pin allows multiple LM5005 regulators to self-synchronize or be synchronized to an external clock signal. Additional protection features include configurable soft start, external power supply tracking, thermal shutdown with automatic recovery, and remote shutdown capability.

The LM5005 is available in an 20-pin HTSSOP package with an exposed pad that is soldered to the PCB to achieve a low junction-to-board thermal impedance. To create a custom regulator design, use the LM5005 with WEBENCH^® Power Designer.

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Alle anzeigen 3

	Typ	Titel		Datum
*	Data sheet	LM5005 75-V, 2.5-A Step-Down Switching Regulator With Wide Input Voltage Range datasheet (Rev. E)	PDF \| HTML	11 Nov 2016
	White paper	Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A)		03 Jul 2018
	EVM User's guide	AN-1748 LM5005 Evaluation Board (Rev. A)		30 Apr 2013

Design und Entwicklung

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