LT1766EGNPBF Linear Technology Corporation, LT1766EGNPBF Datasheet

LT1766EGNPBF

Manufacturer Part Number

LT1766EGNPBF

Description

SSOP16

Manufacturer

Linear Technology Corporation

Datasheets

1.LT1766EFEPBF.pdf (30 pages)

2.LT1766EGNPBF.pdf (28 pages)

Specifications of LT1766EGNPBF

Date_code

05+

Current page: 1 of 30
Download datasheet (285Kb)

APPLICATIONS

TYPICAL APPLICATION

FEATURES

5.5V TO 60V

Wide Input Range: 5.5V to 60V

1.5A Peak Switch Current

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

Small 16-Pin SSOP and Thermally Enhanced

TSSOP Packages

High Voltage, Industrial and Automotive

Portable Computers

Battery-Powered Systems

Battery Chargers

Distributed Power Systems

†

FOR INPUT VOLTAGES BELOW 7.5V, SOME RESTRICTIONS MAY APPLY

TDK C4532X7R2A225K

OFF

2.2μF

100V

CERAMIC

†

0.022μF

SHDN

SYNC

5V Buck Converter

GND

1, 8, 9, 16

2.2k

LT1766

BOOST

BIAS

1766 TA01

220pF

10MQ060N

0.33μF

1N4148W

47μH

15.4k

4.99k

Step-Down Switching Regulator

100μF 10V

SOLID

TANTALUM

OUT

DESCRIPTION

The LT

ing regulators that accept input voltages up to 60V. A high

efﬁ ciency 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 efﬁ ciency over a wide input range. Efﬁ ciency

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 a TSSOP package with exposed backside

for improved thermal performance.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property

of their respective owners. Protected by U.S. Patents, including 6498466, 6531909.

5.5V to 60V 1.5A, 200kHz

1766/LT1766-5 are 200kHz monolithic buck switch-

100

L = 47μH

OUT

Efﬁ ciency vs Load Current

LT1766/LT1766-5

= 5V

0.25

LOAD CURRENT (A)

0.50

0.75

= 12V

= 42V

1.00

1766 TA02

1.25

1766fc

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