LM3102

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Regulador de tensión reductor síncrono de 2.5A y 1 MHz

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document-pdfAcrobat LM3102 Synchronous 1-MHz, 2.5-A Step-Down Voltage Regulator datasheet (Rev. I) (Inglés) PDF | HTML

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Convertidor buck síncrono SIMPLE SWITCHER® de 3,8 V a 36 V, 3 A con EMI ultrabaja Smaller footprint, higher efficiency, lower IQ and lower EMI.

LM3102

ACTIVO

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Detalles del producto

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

2.5

Vin (min) (V)

4.5

Vin (max) (V)

42

Switching frequency (min) (kHz)

200

Switching frequency (max) (kHz)

1000

Features

Enable, Over Current Protection, Synchronous Rectification, Tracking

Control mode

COT with emulated ripple

Vout (min) (V)

0.8

Vout (max) (V)

7

Iq (typ) (µA)

1000

Duty cycle (max) (%)

94

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

2.5

Vin (min) (V)

4.5

Vin (max) (V)

42

Switching frequency (min) (kHz)

200

Switching frequency (max) (kHz)

1000

Features

Enable, Over Current Protection, Synchronous Rectification, Tracking

Control mode

COT with emulated ripple

Vout (min) (V)

0.8

Vout (max) (V)

7

Iq (typ) (µA)

1000

Duty cycle (max) (%)

94

DSBGA (YPA)

28

0.5625 mm² 0.75 x 0.75

HTSSOP (PWP)

20

41.6 mm² 6.5 x 6.4

Low Component Count and Small Solution Size
Stable With Ceramic and Other Low-ESR Capacitors
No Loop Compensation Required
High Efficiency at a Light Load by DCM Operation
Prebias Start-Up
Ultra-Fast Transient Response
Programmable Soft-Start
Programmable Switching Frequency up to 1 MHz
Valley Current Limit
Output Overvoltage Protection
Precision Internal Reference for an Adjustable Output Voltage Down to 0.8 V
Thermal Shutdown
Key Specifications
- Input Voltage Range 4.5 V to 42 V
- 2.5-A Output Current
- 0.8 V, ±1.5% Reference
- Integrated Dual N-Channel Main and Synchronous MOSFETs
- Thermally Enhanced HTSSOP-20 Package

Low Component Count and Small Solution Size
Stable With Ceramic and Other Low-ESR Capacitors
No Loop Compensation Required
High Efficiency at a Light Load by DCM Operation
Prebias Start-Up
Ultra-Fast Transient Response
Programmable Soft-Start
Programmable Switching Frequency up to 1 MHz
Valley Current Limit
Output Overvoltage Protection
Precision Internal Reference for an Adjustable Output Voltage Down to 0.8 V
Thermal Shutdown
Key Specifications
- Input Voltage Range 4.5 V to 42 V
- 2.5-A Output Current
- 0.8 V, ±1.5% Reference
- Integrated Dual N-Channel Main and Synchronous MOSFETs
- Thermally Enhanced HTSSOP-20 Package

The LM3102 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost-effective buck regulator. The device can supply 2.5 A to loads with an output voltage as low as 0.8 V. Dual N-channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LM3102 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low-ESR output capacitors. The device requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the ON-time. The operating frequency can be externally programmed up to
1 MHz. Protection features include V_CC undervoltage lockout (UVLO), output overvoltage protection, thermal shutdown, and gate drive UVLO. The LM3102 is available in the thermally enhanced HTSSOP-20 package, and LM3102 is also available in a DSBGA low-profile chip-scale package with reduced output current.

The LM3102 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost-effective buck regulator. The device can supply 2.5 A to loads with an output voltage as low as 0.8 V. Dual N-channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LM3102 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low-ESR output capacitors. The device requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the ON-time. The operating frequency can be externally programmed up to
1 MHz. Protection features include V_CC undervoltage lockout (UVLO), output overvoltage protection, thermal shutdown, and gate drive UVLO. The LM3102 is available in the thermally enhanced HTSSOP-20 package, and LM3102 is also available in a DSBGA low-profile chip-scale package with reduced output current.

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Documentación técnica

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	Tipo	Título		Fecha
*	Data sheet	LM3102 Synchronous 1-MHz, 2.5-A Step-Down Voltage Regulator datasheet (Rev. I)	PDF \| HTML	23 ene 2018
	Application note	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	25 mar 2024
	Selection guide	Power Management Guide 2018 (Rev. R)		25 jun 2018
	White paper	Synchronous Rectification in High-Performance Power Converter Design (Rev. A)		15 sep 2016
	Application note	Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)		12 sep 2014
	User guide	AN-1646 LM3102 Demonstration Board Reference Design (Rev. A)		29 abr 2013
	Application note	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		24 abr 2013
	Application note	AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)		23 abr 2013
	Application note	AN-1197 Selecting Inductors for Buck Converters (Rev. B)		23 abr 2013
	Application note	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		23 abr 2013
	Application note	AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)		23 abr 2013
	Application note	AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)		23 abr 2013
	Application note	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		23 abr 2013
	Application note	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		23 abr 2013
	Application note	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		23 abr 2013
	Application note	AN-2200 Precision Current Limiting with the LMP8646 and LMZ12003 (Rev. A)		23 abr 2013
	Application note	AN-2218 Precision Current Limiting with the LMP8646 and LM3102 (Rev. A)		23 abr 2013
	User guide	AN-1646 LM3102 Demonstration Board Reference Design		01 oct 2007
	Application note	Input and Output Capacitor Selection		19 sep 2005
	More literature	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		12 jul 2005
	Application note	AN-643 EMI/RFI Board Design (Rev. B)		03 may 2004

Diseño y desarrollo

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