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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 | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 750315827 | SPEC | 11 files | Active i| Production is active. Expected lifetime: >10 years. | WE-FLYLT Flyback Transformers for Linear Technology | 36 - 72 V (DC) | 5 | 580 | 150 | 4:1 | – | 0.8 | – | 3.6 | 1500 | EP7 | LT8303 | – | – | – | – | – | – | ||
 | 74279252 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | 4000 | – | 0.035 | – | – | 1812 | – | 880 | 940 | 108 MHz | 4000 | 0.035 | High Current |
| Samples |
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| 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 | Samples |
|---|
