LT4320IDD#PBF, IDEAL DIODE CNTRL IC, -40 TO 85DEG C

LT4320 is an ideal diode bridge controllers that drive four N-channel MOSFETs. By maximizing available voltage and reducing power dissipation (see thermograph comparison below), the ideal diode bridge simplifies power supply design and reduces power supply cost, especially in low voltage applications. An ideal diode bridge also eliminates thermal design problems, costly heat sinks, and greatly reduces PC board area. The LT4320's internal charge pump supports an all NMOS design, which eliminates larger and more costly PMOS switches. If the power source fails or is shorted, a fast turn-off minimizes reverse current transients. The LT4320 is designed for DC to 60Hz typical voltage rectification. Typical applications include Security cameras, terrestrial or airborne power distribution systems, PoE powered device with a secondary input, polarity-agnostic power input and diode bridge replacement.

• Maximizes power efficiency
• Eliminates thermal design problems
• 9V to 72V operating voltage range
• IQ = 1.5mA (typical)
• Maximizes available voltage
• 8-lead (3mm × 3mm) plastic DFN package
• Operating temperature range from -40°C to 85°C