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Analog Devices LT8303 | Demoboard ICM-01
100VIN Micropower Isolated Flyback Converter with 150V/450mA Switch
Overview
| Topology | Buck Converter |
| Input voltage | 9-60 V |
| Switching frequency | 320-380 kHz |
| Output 1 | 5 V |
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.
Features
- 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
- VOUT 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
- AEC-Q100 Qualified for Automotive Applications
Typical applications
- Isolated Telecom, Datacom, Automotive, Industrial, and Medical Power Supplies, Isolated Auxiliary/Housekeeping Power Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | VIN | VOut1(V) | IOut1(mA) | L(µH) | n | IR(mA) | ISAT(A) | RDC max.(Ω) | LS(µH) | VT(V (AC)) | Size | IC Reference | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(Ω) | Type | SamplesAvailability & Sample | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPECWE-FLYLT Flyback Transformers for Linear Technology, 36 - 72 V (DC), 5 V | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FLYLT Flyback Transformers for Linear Technology | Input Voltage 36 - 72 V (DC) | Output Voltage 15 V | Output Current 1580 mA | Inductance150 µH | Turns Ratio4:1 | – | Saturation Current0.8 A | – | Leakage Inductance3.6 µH | Insulation Test Voltage1500 V (AC) | SizeEP7 | IC ReferenceLT8303 | – | – | – | – | – | – | –Check availability | |||
 | SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, – | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | Rated Current4000 mA | – | DC Resistance [1]0.035 Ω | – | – | Size1812 | – | Impedance @ 100 MHz880 Ω | Maximum Impedance940 Ω | Maximum Impedance108 MHz | Rated Current 24000 mA | DC Resistance0.035 Ω | TypeHigh Current | –Check availability |
Availability Forecast
WE item number Packaging unitsLead time
––– weeks
| Expected Availability | Opening inventory | Quantity |
|---|---|---|
| Current Availability | – | – |
There is no forecast for this quantity request.
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