LT1940 Datasheet PDF | Linear Technology

Linear Technology LT1940

The LT1940’s 1.1MHz switching frequency allows the use of tiny inductors and capacitors, resulting in a very small dual 1.4A output solution. With its wide input range of 3.6V to 25V, the LT1940 regulates a wide variety of power sources, from 4-cell batteries and 5V logic rails to unregulated wall transformers, lead acid batteries and distributed-power supplies. The LT1940L is intended to operate from regulated 5V supplies.

Part No.	LT1940
Datasheet	LT1940 Download
Manufacturer	Linear Technology
Description	1.1MHz Step-Down Switching Regulator
Buy	Stock & Price

FEATURES

s Wide Input Voltage Range LT1940: 3.6V to 25V LT1940L: 3.6V to 7V s Two 1.4A Output Switching Regulators with Internal Power Switches s Constant 1.1MHz Switching Frequency s Anti-Phase Switching Reduces Ripple s Independent Shutdown/Soft-Start Pins s Independent Power Good Indicators Ease Supply Sequencing s Uses Small Inductors and Ceramic Capacitors s Small 16-Lead Thermally Enhanced TSSOP Surface MUount Package APPLICATIO S s Disk Drives s DSP Power Supplies s Wall Transformer Regulation s Distributed Power Regulation s DSL Modems s Cable Modems , LTC and LT are registered trademarks of Linear Technology Corporation. LT1940/LT1940L Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator DESCRIPTIO The LT®1940 is a dual current mode PWM step-down DC/DC converter with internal 2A power switches. Both converters are synchronized to a single 1.1MHz oscillator and run with opposite phases, reducing input ripple current. The output voltages are set with external resistor dividers, and each regulator has independent shutdown and soft-start circuits.