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LT1766IFE#PBF

Description
Conv DC-DC 5.5V to 60V Step Down Single-Out 1.2V to 54V 3A Automotive 16-Pin TSSOP EP Tube
CategoryPower/power management    The power supply circuit   
File Size286KB,30 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
Download Datasheet Parametric View All

LT1766IFE#PBF Overview

Conv DC-DC 5.5V to 60V Step Down Single-Out 1.2V to 54V 3A Automotive 16-Pin TSSOP EP Tube

LT1766IFE#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeStep Down
Output TypeAdjustable
Switching Frequency (kHz)216
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)1.2 to 54
Maximum Output Current (A)3
Minimum Input Voltage (V)5.5
Maximum Input Voltage (V)60
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
Supplier Temperature GradeIndustrial
PackagingTube
Pin Count16
Standard Package NameSOP
Supplier PackageTSSOP EP
MountingSurface Mount
Package Height0.95(Max)
Package Length5.1(Max)
Package Width4.5(Max)
PCB changed16
Lead ShapeGull-wing
LT1766/LT1766-5
5.5V to 60V 1.5A, 200kHz
Step-Down Switching Regulator
FEATURES
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DESCRIPTION
The LT
®
1766/LT1766-5 are 200kHz monolithic buck switch-
ing 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 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.
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
APPLICATIONS
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High Voltage, Industrial and Automotive
Portable Computers
Battery-Powered Systems
Battery Chargers
Distributed Power Systems
TYPICAL APPLICATION
5V Buck Converter
1N4148W
6
V
IN
*
5.5V TO 60V
4
2.2μF
100V
CERAMIC
OFF ON
15
14
BOOST
V
IN
LT1766
SHDN
SYNC
GND
BIAS
FB
V
C
10
12
15.4k
4.99k
SW
0.33μF
2
47μH
100
V
OUT
5V
1A
Efficiency vs Load Current
V
OUT
= 5V
L = 47μH
V
IN
= 12V
10MQ060N
+
90
EFFICIENCY (%)
V
IN
= 42V
80
100μF 10V
SOLID
TANTALUM
70
1, 8, 9, 16 11
2.2k
0.022μF
1766 TA01
60
220pF
50
0
0.25
0.75
1.00
0.50
LOAD CURRENT (A)
1.25
1766 TA02
*FOR INPUT VOLTAGES BELOW 7.5V, SOME RESTRICTIONS MAY APPLY
TDK C4532X7R2A225K
1766fc
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