Maxim MAX17250 DC-DC Boost Converter is a high-efficiency, low quiescent current, synchronous boost (step-up) converter with True Shutdown™, programmable input current limit, and short-circuit protection. The MAX17250 has a wide input voltage range of 2.7V to 18V and generates an output voltage of 3V to 18V. The MAX17250 has a maximum on-time of 800ns and implements three modes of operation. The first mode of operation is a soft-start mode at power-up. The second mode of operation is normal operation and utilizes a fixed on-time/minimum off-time Pulse Frequency Modulation (PFM) architecture that uses only 60μA (typ) quiescent current due to the converter switching only when needed. The last mode is True Shutdown, where the output is completely disconnected from the input, and the battery drain is minimized to 0.1µA (typ) shutdown current.
- Input Voltage Range 2.7V to 18V
- 1 or 2 Cell Li-ion Batteries
- Output Voltage Range 3V to 18V, > VIN
- Integrated Power FETs
- Selectable Input Peak Current Limit (ISET)
- 3.5A, 2.7A, or 1.85A
- 93% Efficiency
- Low Power
- 0.1µA True Shutdown Current
- 60µA Quiescent Current
- True Shutdown Prevents Current Flowing Between Input and Output
- Soft-Start Inrush Protection
- Short-Circuit Protection
- Overtemperature Protection
- -40°C to +125°C Operation
The Maxim MAX17250 DC-DC boost converter, available from Mouser Electronics, includes a selectable input peak current limit of 3.5 A, 2.7 A, or 1.85 A and operates over an input voltage range of 2.7 V to 18 V with an output voltage range of 3 V to 18 V. The device supports switching frequencies up to 1 MHz and offers short-circuit protection and a maximum on-time of 800 ns in a space-saving 12-bump, 1.72 mm × 1.49 mm package.
The MAX17250 converter implements three modes of operation: The first mode of operation is a soft-start mode at power-up. The second mode of operation is normal operation, which uses a fixed on-time/minimum off-time pulse frequency modulation (PFM) architecture that uses only 60 μA (typical) quiescent current due to the converter switching only when needed. The MAX17250 converter’s True Shutdown™ mode completely disconnects the output from the input, resulting in a current draw of just 0.1 μA, virtually stopping battery drain, providing long battery life, and eliminating the need for external disconnect switches.
Mouser is also stocking the Maxim MAX17250EVKIT#WLP evaluation kit, a fully assembled and tested kit that incorporates the MAX17250 converter and provides resistor-configurable output voltages from 3 V to 18 V.