ANALOG DEVICES LT3692AIUH#PBF DC-DC Switching Buck Regulator, Adjustable, 3V to 36V in, 0.8V out, QFN-EP-32

LT3692AIUH#PBF is a dual current-mode PWM step-down DC/DC converter. Each channel boasts independent input voltage, shutdown, feedback, soft-start, UVLO current limit, and comparator pins, simplifying complex power supply tracking and sequencing requirements. To optimize efficiency and component size, both converters offer a programmable maximum current limit and can be synchronized to either a common external clock input or a resistor-settable fixed 250KHz to 2MHz internal oscillator. Additionally, 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. Furthermore, minimum input-to-output voltage ratios are improved by allowing the switch to remain on through multiple clock cycles, switching off only when the boost capacitor needs recharging. Applications for this device include automotive supplies and distributed supply regulation.

• OVLO protects circuit through 60V transients, 3V to 36V input voltage range
• Die temperature monitor, independent synchronized switching frequencies optimize component size
• Antiphase switching, outputs can be paralleled, flexible output voltage tracking
• VIN1 quiescent current is 4mA typical at (VSHDN = 2V, TA = 25°C)
• VIN1 shutdown current is 6µA typical at (VSHDN = 0V, TA = 25°C)
• Switching frequency is 1KHz typical at (RRT/SYNC = 28k, TA = 25°C)
• Switch leakage current Ch 1/2 is 1µA typical at (VSW1/2 = 0V)
• Boost current Ch 1/2 is 13mA typical at (ISW1/2 = 500mA, VBST1/2 = 8V, TA = 25°C)
• Minimum switch on-time Ch 1/2 is 140ns 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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