Summary of LTC3622/LTC3622-2 – 17V, Dual 1A Synchronous Step-Down Regulator with Ultralow Quiescent Current
The LTC3622 is a dual 1A synchronous step-down regulator supporting VIN 2.7–17V and VOUT 0.6V–VIN, offering up to 95% efficiency, ultralow quiescent current, and 100% duty-cycle operation. It provides fixed switching frequencies (1MHz or 2.25MHz) with ±50% external sync, ±1% output accuracy, programmable phase shift, selectable current limit, internal compensation, soft-start, and a compact 14-pin DFN package.
Parts used in the LTC3622 Project:
- LTC3622 dual synchronous step-down regulator (14-pin DFN)
Features
- Dual Step-Down Outputs: 1A Per Channel
- Wide VIN Range: 2.7V to 17V
- Wide VOUT Range: 0.6V to VIN
- Up to 95% Efficiency
- No-Load IQ = 5μA with Both Channels Enabled; IQ < 4μA with Only One Channel Enabled
- High Efficiency, Low Dropout Operation (100% Duty Cycle)
- Constant Frequency (1MHz/2.25MHz) with External Frequency Synchronization
- ±1% Output Voltage Accuracy
- Current Mode Operation for Excellent Line and Load Transient Response
- Phase Shift Programmable with External Clock
- Selectable Current Limit
- Internal Compensation and Soft-Start
- Compact 14-Pin DFN (3mm × 4mm) Package
Description
The LTC®3622 is a dual 1A output, high efficiency synchronous monolithic step-down regulator capable of operating from input supplies up to 17V. The switching frequency is fixed to 1MHz or 2.25MHz with a ±50% synchronization range to an external clock. The regulator features ultralow quiescent current and high efficiency over a wide output voltage range.
For more detail: LTC3622/LTC3622-2 – 17V, Dual 1A Synchronous Step-Down Regulator with Ultralow Quiescent Current
- What is the input voltage range for the LTC3622?
The input voltage range is 2.7V to 17V. - What output current can each channel provide?
Each channel can provide 1A output current. - What output voltage range does the LTC3622 support?
The output voltage range is 0.6V to VIN. - What switching frequencies are available and can they be synchronized?
The switching frequency is fixed to 1MHz or 2.25MHz and can be synchronized to an external clock with a ±50% range. - What is the no-load quiescent current?
No-load IQ is 5μA with both channels enabled and less than 4μA with only one channel enabled. - Does the LTC3622 support 100% duty cycle operation?
Yes, it supports high efficiency, low dropout operation at 100% duty cycle. - What is the output voltage accuracy?
The output voltage accuracy is ±1%. - Does the device include protection and compensation features?
Yes, it has selectable current limit, internal compensation, and soft-start. - What package does the LTC3622 come in?
It comes in a compact 14-pin DFN (3mm × 4mm) package.
