The LI@1500 is an adaptive-frequency current mode step- up switching regulator with an inteynal power switch that is rated up t0 700mA In contrast to pulse skipping switching regulators, the LT1500 uses a current mode topology that provides lower noise operation and im- proved efficiency. Only at very light loads is Burst Mode' activated to give high efficiency and micropower opera- tion. High switching frequency (up t0 500kHz) allows very small inductors to be used, along with ceramic capacitors if desired.
N74157F Price| CHARACTERISTIC | SYMBOL | RATING | UNIT |
| Supply Voltage | VCC | 4 | V |
| Total Power Dissipation | PD (Note l) | 300 | mW |
| Operating Temperature | Topr | - 4085 | C |
| Storage Temperature | Tstg | - 55150 | oC |
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N74157F on stock| Characteristics | Symbol | Rating | Unit |
| Collector-base voltage | VCBO | -50 | V |
| Collector-emitter voltage | VCEO | -50 | V |
| Emitter-base voltage | VEBO | -7 | V |
| | DC | lc | -2.0 | A |
| Collector current | Pulse | ICP | -3.5 |
| Base current | lB | -200 | mA |
| Collector power | t= 10 S | Pc | 2 5 | W |
| dissipation | DC | (Note l) | 1 0 |
| Junction temperature | Tj | 150 | oc |
| Storage temperature range | Tstg | -55 t0 150 | oc |
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