The L4975A is a step down monolithic power switching regulator delivering 5A at a voltage variable from 5.1 to 40V. Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4975A include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a 15-lead multi watt plastic power package and requires few external components. Efficient operation at switching frequencies up to 500KHz allows reduction in the size and cost of external filter components.
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The L4975A is a step down monolithic power switching regulator delivering 5A at a voltage variable from 5.1 to 40V. Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4975A include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a 15-lead multi watt plastic power package and requires few external components. Efficient operation at switching frequencies up to 500KHz allows reduction in the size and cost of external filter components.
Features:-
? 5a Output Current
? 5.1v To 40v Output Voltage Range
? 0 To 90% Duty Cycle Range
? Internal Feed-Forward Line Regulation
? Internal Current Limiting
? Precise 5.1v ? 2% On Chip Reference
? Reset And Power Fail Functions
? Soft Start
? Input/Output Sync Pin
? Under Voltage Lock Out With Hysteretic Turn-On
? Pwm Latch For Single Pulse Per Period
? Very High Efficiency
? Switching Frequency Up To 500khz
? Thermal Shutdown
? Continuous Mode Operation
Specifications:-
| Symbol | Parameters | Values | Units |
| V9 | Input Voltage | 55 | V |
| V9 | Input Operating Voltage | 50 | V |
| V7 | Output DC Voltage | -1 | V |
| Output Peak Voltage at t = 0.1?s f = 200KHz | -7 | ||
| I7 | Maximum Output Current | Internally Limited | |
| V6 | Bootstrap Voltage | 65 | V |
| Bootstrap Operating Voltage | V9 + 15 | ||
| V3, V12 | Input Voltage at Pins 3, 12 | 12 | V |
| V4 | Reset Output Voltage | 50 | V |
| I4 | Reset Output Sink Current | 50 | mA |
| V5, V10, V11, V13 | Input Voltage at Pin 2,7,9,10 | 7 | V |
| I5 | Reset Delay Sink Current | 30 | mA |
| I10 | Error Amplifier Output Sink Current | 1 | A |
| I12 | Soft Start Sink Current | 30 | mA |
| Ptot | Total Power Dissipation at Tcase < 90?C | 30 | W |
| Tj, Tstg | Junction and Storage Temperature | -40 to 150 | ?C |
Related Document:-
Operating voltage | 2.5 3.0V |
Pixel Resolution | 0.3MP |
Photosensitive array | 640 x 480 |
Optical Size | 1.6 inch |
Angel of view | 67 degrees |
Maximum Frame Rate | 30fps VGA |
Sensitivity | 1.3V/(Lux-sec) |
Dormancy | Less than 20A |
Power consumption | 60mW/15fpsVGA YUV |
Temperature operation Range | -30 C ~ 70 C |
Pixel area | 3.6 x 3.6 m |
Signal to noise ratio (SNR) | 46 dB |
Dynamic range | 52 dB |
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