ANALOG DEVICES LT3992EUH#PBF DC-DC Switching Buck Regulator, Adjustable, 3V to 60V in, 0.8V out, QFN-EP-32

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

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