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LTC1622, LTC1622CMS8, LTC1622CMS8/TR

Table of contents:
Info of LTC1622
Info of LTC1622CMS8
Info of LTC1622CMS8/TR

LTC1622, LTC1622CMS8, LTC1622CMS8/TR Selling Leads, Datasheet

MFG:Linear Technology Category:Integrated Circuits (ICs) Package Cooled:5PIN D/C:new

LTC1622, LTC1622CMS8, LTC1622CMS8/TR Datasheet download

Five Points

Part Number: LTC1622CMS8

Category: Integrated Circuits (ICs)

MFG: Linear Technology

Package Cooled: 5PIN

D/C: new

Description: IC DC/DC CNTRLR STEP-DOWN 8-MSOP

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LTC1622 General Description

The LTC®1622 is a constant frequency current mode stepdown DC/DC controller providing excellent AC and DC load and line regulation. The device incorporates an accurate undervoltage feature that shuts the LTC1622 down when
the input voltage falls below 2V.

The LTC1622 boasts a ±1.9% output voltage accuracy and consumes only 350mA of quiescent current. For applications where efficiency is a prime consideration and the load current varies from light to heavy, the LTC1622 can
be configured for Burst Mode^TM operation. Burst Mode operation enhances low current efficiency and extends battery run time. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low to reduce noise and possible RF interference.

High constant operating frequency of 550kHz allows the use of a small inductor. The device can also be synchronized up to 750kHz for special applications. The high frequency operation and the available 8-lead MSOP package create a high performance solution in an extremely small amount of PCB area.

To further maximize the life of the battery source, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle). In shutdown, the device draws a mere 15A.

LTC1622 Maximum Ratings

Input Supply Voltage (V_IN)..........................0.3V to 10V
RUN/SS Voltage .........................................0.3V to 2.4V
SYNC/MODE Voltage .................................. 0.3V to V_INSENSEVoltage ............................................ 2.4V to V_INPDRV Peak Output Current (<10s) ............................ 1A
Storage Ambient Temperature Range ... 65°C to 150
Operating Temperature Range
Commercial ..................................................... 0 to 70
Industrial ................................................... 45 to 85
Junction Temperature (Note 2) ................................ 125
Lead Temperature (Soldering, 10 sec)...................... 300

LTC1622 Features

·High Efficiency
· Constant Frequency 550kHz Operation
· V_INRange: 2V to 10V
· Multiampere Output Currents
· OPTI-LOOPTM Compensation Minimizes C_OUT· Selectable, Burst Mode Operation
· Low Dropout Operation: 100% Duty Cycle
· Synchronizable up to 750kHz
· Current Mode Operation for Excellent Line and Load Transient Response
· Low Quiescent Current: 350mA
· Shutdown Mode Draws Only 15mA Supply Current
· ±1.9% Reference Accuracy
·Available in 8-Lead MSOP

LTC1622 Typical Application

·1- or 2-Cell Li-Ion Powered Applications
· Cellular Telephones
· Wireless Modems
· Portable Computers
· Distributed 3.3V, 2.5V or 1.8V Power Systems
·Scanners
· Battery-Powered Equipment

LTC1622 Connection Diagram

LTC1622CMS8 Parameters

Technical/Catalog Information	LTC1622CMS8
Vendor	Linear Technology
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck)
Number of Outputs	1
Voltage - Input	2 ~ 10 V
Voltage - Output	-
Current - Output	1A
Power - Output	-
Package / Case	8-MSOP, Micro8?, 8-uMAX, 8-uSOP,
Packaging	Bulk
Internal Switch(s)	No
Synchronous	Yes
Rds (On)	-
Operating Temperature	0°C ~ 70°C
Frequency - Switching	110kHz ~ 550kHz
Drawing Number	161; 05-08-1660; MS, MS8; 8
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	LTC1622CMS8 LTC1622CMS8

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