LT3992EUH#PBF

LT3992EUH#PBF is a dual current mode PWM step-down DC/DC converter with two internal 4.6A switches. Independent input voltage, shutdown, feedback, soft-start, UVLO current limit and comparator pins for each channel simplify complex power supply tracking and sequencing requirements. To optimize efficiency and component size, both converters have a programmable maximum current limit and are synchronized to either a common external clock input or a resistor settable fixed 250KHz to 2MHz internal oscillator. A frequency divider is provided for channel 1 to further optimize component size. At all frequencies, a 180° phase relationship between channels is maintained, reducing voltage ripple and component size. A clock output is available for synchronizing multiple regulators. Applications include automotive supplies, distributed supply regulation.

• Wide input voltage range from 3V to 60V, die temperature monitor
• Independent synchronized switching frequencies optimize component size
• Antiphase switching, outputs can be paralleled, flexible output voltage tracking
• Low dropout: 95% maximum duty cycle, VIN1 shutdown current is 6µA typ at (VSHDN = 0V)
• VIN1 quiescent current is 4.2mA typical at (VFB1/2 = 2V, TA = 25°C)
• Feedback voltage regulation is 806mV typical at (VVIN1/2 = 4V to 60V, TA = 25°C)
• Switching frequency is 1000KHz typical at (RRT/SYNC = 28K, TA = 25°C)
• Switch leakage current CH1/2 is 1µA typical at (VSW1/2 = 0V, TA = 25°C)
• Minimum switch on-time CH1/2 is 160ns typical at (TA = 25°C)
• Operating junction temperature range from -40°C to 125°C, 32-lead plastic QFN package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party