3508H中文资料Dual Monolithic 1.4A Step-Down Switching Regulator数据手册ADI规格书

描述 Description

DESCRIPTION
The LT®3508 is a dual current mode PWM step-down DC/DC converter with internal power switches capable of generating two 1.4A outputs. The wide input voltage range of 3.7V to 36V makes the LT3508 suitable for regulating power from a wide variety of sources, including automotive batteries, 24V industrial supplies and unregulated wall adapters. Both converters are synchronized to a single oscillator programmable up to 2.5MHz and run with opposite phases, reducing input ripple current.FEATURES
■ Wide Input Voltage Range: 3.7V to 36V
■ Two 1.4A Output Switching Regulators with Internal Power Switches
■ Adjustable 250kHz to 2.5MHz Switching Frequency
■ Synchronizable over the Full Frequency Range
■ Anti-Phase Switching Reduces Ripple
■ Uses Small Inductors and Ceramic Capacitors
■ Accurate Programmable Undervoltage Lockout
■ Independent Tracking, Soft-Start and Power Good Circuits Ease Supply Sequencing
■ Output Adjustable Down to 800mV
■ Small 4mm × 4mm 24-Pin QFN or 16-Pin Thermally Enhanced TSSOP Surface Mount PackagesAPPLICATIONS
■ Automotive
■ DSP Power Supplies
■ Wall Transformer Regulation
■ DSL and Cable Modems
■ PCI Express

特性 Features

■ Wide Input Voltage Range: 3.7V to 36V
■ Two 1.4A Output Switching Regulators with Internal Power Switches
■ Adjustable 250kHz to 2.5MHz Switching Frequency
■ Synchronizable over the Full Frequency Range
■ Anti-Phase Switching Reduces Ripple
■ Uses Small Inductors and Ceramic Capacitors
■ Accurate Programmable Undervoltage Lockout
■ Independent Tracking, Soft-Start and Power Good Circuits Ease Supply Sequencing
■ Output Adjustable Down to 800mV
■ Small 4mm × 4mm 24-Pin QFN or 16-Pin Thermally Enhanced TSSOP Surface Mount Packages