Micropower isolated flyback converter regulates isolated outputs by sampling the primary-side flyback waveform, eliminating the need for an opto-isolator or third transformer winding. The device operates from a 2.7 V to 42 V input range and integrates a 65 V, 1.2 A DMOS power switch. It can deliver up to 6 W of isolated output power with boundary-mode operation at heavy load and low-ripple Burst Mode operation at light load. Internal compensation, soft-start, EN/UVLO control, and short-circuit protection are integrated in a 5-lead TSOT-23 package.
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| Input voltage range | 2.7 to 42V |
| Internal power switch voltage rating | 65V |
| Internal power switch current rating | 1.2A |
| Maximum isolated output power | 6W |
| Sleep-mode quiescent current | 100 typµA |
| Active-mode quiescent current | 350 typµA |
| Shutdown quiescent current | 0.8 typ, 2 maxµA |
| Minimum switching frequency | 10 typkHz |
| Minimum switch-on time | 170 typns |
| Maximum switch-off backup timer | 190 typµs |
| Maximum SW current limit | 1.2 min, 1.375 typ, 1.55 maxA |
| Minimum SW current limit | 0.22 min, 0.29 typ, 0.36 maxA |
| Switch on-resistance | 0.4 typΩ |
| RFB regulation current | 97.5 min, 100 typ, 102.5 maxµA |
| EN/UVLO enable threshold | 1.204 min, 1.228 typ, 1.248 maxV |
| Minimum load requirement | <0.5 typ of full output% |
| Operating junction temperature range | -40 to 125 for E/I grades, -40 to 150 for H/J grades, -55 to 150 for MP grade°C |
| Package | 5-lead plastic TSOT-23 |
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