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LT8303IS5#TRMPBF

Description
DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R
File Size1MB,24 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LT8303IS5#TRMPBF Overview

DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R

LT8303IS5#TRMPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8504.40.95.80
Number of Outputs1
TopologyFlyback
Maximum Switching Frequency (kHz)380
Minimum Input Voltage (V)5.5
Maximum Input Voltage (V)100
Operating Supply Voltage (V)5.5 to 100
Maximum Supply Current (mA)0.07(Typ)
Typical Quiescent Current (mA)0.28
Minimum Switching Frequency (kHz)5
Typical Switching Frequency (kHz)350
Synchronous RectifierNo
Synchronous ClockNo
ProgrammabilityNo
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
Supplier Temperature GradeIndustrial
PackagingTape and Reel
Supplier PackageTSOT-23
Pin Count5
Standard Package NameSOT
MountingSurface Mount
Package Height0.9(Max)
Package Length2.9
Package Width1.75(Max)
PCB changed5
Lead ShapeGull-wing
FeaTures
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LT8303
100V
IN
Micropower Isolated
Flyback Converter with
150V/450mA Switch
DescripTion
The
LT
®
8303
is a micropower high voltage isolated flyback
converter. By sampling the isolated output voltage directly
from the primary-side flyback waveform, the part requires
no third winding or opto-isolator for regulation. The output
voltage is programmed with a single external resistor.
Internal compensation and soft-start further reduce external
component count. Boundary mode operation provides a
small magnetic solution with excellent load regulation.
Low ripple Burst Mode operation maintains high efficiency
at light load while minimizing the output voltage ripple.
A 450mA, 150V DMOS power switch is integrated along
with all high voltage circuitry and control logic into a 5-lead
ThinSOT™ package.
The LT8303 operates from an input voltages range of 5.5V
to 100V and can deliver up to 5W of isolated output power.
The high level of integration and the use of boundary mode
and low ripple Burst Mode operations result in a simple to
use, low component count, and high efficiency application
solution for isolated power delivery.
L,
LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode 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 5438499, 7463497,
and 7471522.
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n
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5.5V to 100V Input Voltage Range
450mA, 150V Internal DMOS Power Switch
Up to 5W of Output Power
Low Quiescent Current:
70µA in Sleep Mode
280µA in Active Mode
Boundary Mode Operation at Heavy Load
Low Ripple Burst Mode
®
Operation at Light Load
Minimum Load <0.5% (Typ) of Full Output
V
OUT
Set with a Single External Resistor
No Transformer Third Winding or Opto-Isolator
Required for Regulation
Accurate EN/UVLO Threshold and Hysteresis
Internal Compensation and Soft-Start
5-Lead TSOT-23 Package
applicaTions
n
n
Isolated Telecom, Datacom, Automotive, Industrial,
and Medical Power Supplies
Isolated Auxiliary/Housekeeping Power Supplies
Typical applicaTion
6V to 80V
IN
, 5V
OUT
Isolated Flyback Converter
V
IN
6V TO 80V
4.7µF
V
IN
LT8303
EN/UVLO
SW
316k
R
FB
GND
8303 TA01a
Efficiency vs Load Current
V
OUT+
5V
100
90
EFFICIENCY (%)
80
70
60
50
40
V
IN
= 12V
V
IN
= 24V
V
IN
= 48V
V
IN
= 72V
0
100 200 300 400 500 600 700 800 900
LOAD CURRENT (mA)
8303 TA01b
T1
6:1
150µH
4.2µH
100µF
V
OUT–
2.5mA TO 0.33A (V
IN
= 12V)
2.5mA TO 0.52A (V
IN
= 24V)
2.5mA TO 0.73A (V
IN
= 48V)
2.5mA TO 0.84A (V
IN
= 72V)
8303fa
For more information
www.linear.com/LT8303
1

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Description DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R DC/DC Cntrlr Single-OUT Flyback 380kHz Automotive 5-Pin TSOT-23 T/R
EU restricts the use of certain hazardous substances Compliant - - - Compliant Compliant Compliant Compliant Compliant
ECCN (US) EAR99 - - - EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Active - - - Unconfirmed Active Active Unconfirmed Active
HTS 8504.40.95.80 - - - 8542.39.00.01 8542.39.00.01 8542.39.00.01 - 8542.39.00.01
Number of Outputs 1 - - - 1 1 1 1 1
Topology Flyback - - - Flyback Flyback Flyback Flyback Flyback
Maximum Switching Frequency (kHz) 380 - - - 380 380 380 380 380
Minimum Input Voltage (V) 5.5 - - - 5.5 5.5 5.5 5.5 5.5
Maximum Input Voltage (V) 100 - - - 100 100 100 100 100
Operating Supply Voltage (V) 5.5 to 100 - - - 5.5 to 100 5.5 to 100 5.5 to 100 5.5 to 100 5.5 to 100
Maximum Supply Current (mA) 0.07(Typ) - - - 0.07(Typ) 0.07(Typ) 0.07(Typ) 0.07(Typ) 0.07(Typ)
Typical Quiescent Current (mA) 0.28 - - - 0.28 0.28 0.28 0.28 0.28
Minimum Switching Frequency (kHz) 5 - - - 5 5 5 5 5
Typical Switching Frequency (kHz) 350 - - - 350 350 350 350 350
Synchronous Rectifier No - - - No No No No No
Synchronous Clock No - - - No No No No No
Programmability No - - - No No No No No
Minimum Operating Temperature (°C) -40 - - - -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 125 - - - 150 150 150 125 125
Supplier Temperature Grade Industrial - - - Automotive Automotive Automotive Industrial Industrial
Packaging Tape and Reel - - - Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel
Supplier Package TSOT-23 - - - TSOT-23 TSOT-23 TSOT-23 TSOT-23 TSOT-23
Pin Count 5 - - - 5 5 5 5 5
Standard Package Name SOT - - - SOT SOT SOT SOT SOT
Mounting Surface Mount - - - Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.9(Max) - - - 0.9(Max) 0.9(Max) 0.9(Max) 0.9(Max) 0.9(Max)
Package Length 2.9 - - - 2.9 2.9 2.9 2.9 2.9
Package Width 1.75(Max) - - - 1.75(Max) 1.75(Max) 1.75(Max) 1.75(Max) 1.75(Max)
PCB changed 5 - - - 5 5 5 5 5
Lead Shape Gull-wing - - - Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing
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