LM3100

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Regulador de tensión reductor síncrono de 1.5A y 1 MHz

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document-pdfAcrobat LM3100 Synchronous 1MHz 1.5A Step-Down Voltage Regulator datasheet (Rev. H) (Inglés) PDF | HTML

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LMR33620

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Convertidor buck síncrono SIMPLE SWITCHER® de 3,8 V a 36 V, 2 A con EMI ultrabaja Smaller footprint, higher efficiency, lower IQ and lower EMI.

LM3100

ACTIVO

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Detalles del producto

Rating

Catalog

Topology

Buck

Iout (max) (A)

1.5

Vin (max) (V)

36

Vin (min) (V)

4.5

Vout (max) (V)

7

Vout (min) (V)

0.8

Features

Enable, Overcurrent protection, Synchronous Rectification, Tracking

Control mode

COT with emulated ripple

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.001

Duty cycle (max) (%)

94

Rating

Catalog

Topology

Buck

Iout (max) (A)

1.5

Vin (max) (V)

36

Vin (min) (V)

4.5

Vout (max) (V)

7

Vout (min) (V)

0.8

Features

Enable, Overcurrent protection, Synchronous Rectification, Tracking

Control mode

COT with emulated ripple

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.001

Duty cycle (max) (%)

94

HTSSOP (PWP)

20

41.6 mm² 6.5 x 6.4

Input Voltage Range 4.5 V to 36 V
1.5 A Output Current
0.8 V, ±1.5% Reference
Integrated 40 V, Dual N-Channel Buck Synchronous Switches
Low Component Count and Small Solution Size
No Loop Compensation Required
Ultra-Fast Transient Response
Stable With Ceramic and Other Low ESR Capacitors
Programmable Switching Frequency up to 1 MHz
Max. Duty Cycle Limited During Start-Up
Valley Current Limit
Precision Internal Reference for Adjustable Output Voltage Down to 0.8 V
Thermal Shutdown
Thermally Enhanced HTSSOP-20 Package

Input Voltage Range 4.5 V to 36 V
1.5 A Output Current
0.8 V, ±1.5% Reference
Integrated 40 V, Dual N-Channel Buck Synchronous Switches
Low Component Count and Small Solution Size
No Loop Compensation Required
Ultra-Fast Transient Response
Stable With Ceramic and Other Low ESR Capacitors
Programmable Switching Frequency up to 1 MHz
Max. Duty Cycle Limited During Start-Up
Valley Current Limit
Precision Internal Reference for Adjustable Output Voltage Down to 0.8 V
Thermal Shutdown
Thermally Enhanced HTSSOP-20 Package

The LM3100 Synchronously Rectified Buck Converter features all functions needed to implement a highly efficient, cost effective buck regulator capable of supplying 1.5 A to loads with voltages as low as 0.8 V. Dual 40 V N-Channel synchronous MOSFET switches allow for low external component thus reducing complexity and minimizing board space. The LM3100 is designed to work exceptionally well with ceramic and other very low ESR output capacitors. The Constant ON-Time (COT) regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. Through the use of a unique design the regulator does not rely on output capacitor ESR for stability, as do most other COT regulators. The operating frequency remains nearly constant with line and load 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 under-voltage lockout, thermal shutdown and gate drive under-voltage lockout. The part is available in a thermally enhanced HTSSOP-20 package

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Documentación técnica

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Documentación principal	Tipo	Título	Opciones de formato	Fecha
*	Data sheet	LM3100 Synchronous 1MHz 1.5A Step-Down Voltage Regulator datasheet (Rev. H)	PDF \| HTML	04 oct 2017
	Application note	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	25 mar 2024
	Analog Design Journal	Control-Mode Quick Reference Guide (Rev. B)	PDF \| HTML	29 ago 2023
	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
	User guide	AN-1443 LM3100 Demonstration Board Reference Design (Rev. C)		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-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-2218 Precision Current Limiting with the LMP8646 and LM3102 (Rev. A)		23 abr 2013
	Application note	Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (Rev. A)		23 abr 2013
	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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