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LTC1873EG-TR, LTC1874, LTC1874EGNTR

Table of contents:
Info of LTC1873EG-TR
Info of LTC1874
Info of LTC1874EGNTR

LTC1873EG-TR, LTC1874, LTC1874EGNTR Selling Leads, Datasheet

MFG:LINEAR TECHNOLO Package Cooled:SSOP16 D/C:01+

LTC1873EG-TR, LTC1874, LTC1874EGNTR Picture

LTC1873EG-TR, LTC1874, LTC1874EGNTR Datasheet download

Five Points

Part Number: LTC1873EG-TR

MFG: LINEAR TECHNOLO

Package Cooled: SSOP16

D/C: 01+

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LTC1874 General Description

The LTC^®1874 is a dual constant frequency current mode step-down DC/DC controller with excellent AC and DC load and line regulation. Each controller has an accurate undervoltage lockout that shuts down the individual controller
when the input voltage falls below 2.0V.

The LTC1874 boasts ±2.5% output voltage accuracy and consumes only 270A of quiescent current per controller. The LTC1874 is configured with Burst Mode operation, which enhances efficiency at low output current for applications where efficiency is a prime consideration.

To further maximize the life of a battery source, each external P-channel MOSFET is turned on continuously in dropout (100% duty cycle). In shutdown, each controller draws a mere 8A. High constant operating frequency of 550kHz allows the use of small external inductors.

The LTC1874 is available in a small footprint 16-lead narrow SSOP.

LTC1874 Maximum Ratings

Input Supply Voltage (V_IN, PV_IN) ................0.3V to 10V
SENSE, PGATE Voltages .............. 0.3V to (V_IN + 0.3V)
V_FB, I_TH/RUN Voltages ................................0.3V to 2.4V
PGATE Peak Output Current (<10s) ........................... 1A
Storage Ambient Temperature Range ..... .65 to 150
Operating Temperature Range (Note 2) ..... 40 to 85
Junction Temperature (Note 3) ................................. 150
Lead Temperature (Soldering, 10 sec)...................... 300

LTC1874 Features

`High Efficiency: Up to 94%
` High Output Currents Easily Achieved
` Wide V_INRange: 2.5V to 9.8V
` Constant Frequency 550kHz Operation
` Burst Mode^TM Operation at Light Load
` Low Dropout: 100% Duty Cycle
` 0.8V Reference Allows Low Output Voltages
` Current Mode Operation for Excellent Line and Load Transient Response
` Low Quiescent Current: 270A (Each Controller)
` Separate Shutdown Pin for Each Controller
` Shutdown Mode Draws Only 8A Supply Current (Each Controller)
` ±2.5% Reference Accuracy
` Available in 16-Lead Narrow SSOP
` Each Controller Functions Independent of the Other

LTC1874 Typical Application

· 1- or 2-Cell Lithium-Ion-Powered Applications
· Personal Information Appliances
· Portable Computers
· Distributed 3.3V, 2.5V or 1.8V Power Systems

LTC1874 Connection Diagram

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