LT1766EGN

Series: -
Output Type: Adjustable
Number of Outputs: 1
Current - Output: 1.5A
Synchronous Rectifier: No
Mounting Type: Surface Mount
Operating Temperature: -40°C ~ 125°C
Packaging: Tube
Type: Step-Down (Buck)
PWM Type: Current Mode
Manufacturer: Linear Technology
Frequency - Switching: 200kHz
Package / Case: 16-SSOP (0.154", 3.90mm Width)
Voltage - Input: 5.5 V ~ 60 V
Supplier Device Package: 16-SSOP
Voltage - Output: 1.2 V ~ 54 V


Features:

Wide Input Range: 5.5V to 60V
1.5A Peak Switch Current
Small 16-Pin Thermally Enhanced TSSOP and SSOP Packages
Constant 200kHz Switching Frequency
Saturating Switch Design: 0.2Ω
Peak Switch Current Rating Maintained Over Full Duty Cycle Range
Low Effective Supply Current: 2.5mA
Low Shutdown Current: 25µA
1.2V Feedback Reference Voltage (LT1766)
5V Fixed Output (LT1766-5)
Easily Synchronizable
Cycle-by-Cycle Current Limiting


Application

High Voltage, Industrial and Automotive
Portable Computers
Battery-Powered Systems
Battery Chargers
Distributed Power Systems


Pinout




Specifications

Input Voltage (V_IN) .................................................  60V
BOOST Pin Above SW .............................................  35V
BOOST Pin Voltage .................................................  68V
SYNC, SENSE Voltage (LT1766-5) .............................  7V
SHDN Voltage ...........................................................  6V
BIAS Pin Voltage .....................................................  30V
FB Pin Voltage/Current (LT1766) ...................  3.5V/2mA
Operating Junction Temperature Range
  LT1766EFE/LT1766EFE-5/
  LT1766EGN/LT1766EGN-5 (Note 8) ..  40°C to 125°C
  LT1766IFE/LT1766IFE-5/
  LT1766IGN/LT1766IGN-5 (Note 8) ....  40°C to 125°C
Storage Temperature Range ...............  65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................  300°C


Description

The LT^®1766/LT1766-5 are 200kHz monolithic buck switching regulators that accept input voltages up to 60V. A high efficiency 1.5A, 0.2Ω switch is included on the die along with all the necessary oscillator, control and logic circuitry. A current mode control architecture delivers fast transient response and excellent loop stability.

Special design techniques and a new high voltage process achieve high efficiency over a wide input range. Efficiency is maintained over a wide output current range by using the output to bias the circuitry and by utilizing a supply boost capacitor to saturate the power switch. Patented circuitry maintains peak switch current over the full duty cycle range. A shutdown pin reduces supply current to 25µA and the device can be externally synchronized from 228kHz to 700kHz with logic level inputs.

The LT1766/LT1766-5 are available in a 16-pin fused-lead SSOP package or TSSOP package with exposed backside for improved thermal performance.

Parameters:

Technical/Catalog Information	LT1766EGN
Vendor	Linear Technology
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck)
Number of Outputs	1
Voltage - Input	5.5 ~ 60 V
Voltage - Output	1.2 ~ 54 V
Current - Output	1.5A
Power - Output	-
Package / Case	16-SSOP
Packaging	Bulk
Internal Switch(s)	Yes
Synchronous	Yes
Rds (On)	-
Operating Temperature	-40°C ~ 125°C
Frequency - Switching	200kHz
Drawing Number	161; 05-08-1641; GN; 16
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	LT1766EGN LT1766EGN