MAX17543/44/45 Step-Down DC-DC Converters

Maxim's MAX17543/44/45 High-Efficiency Synchronous Step-Down DC-DC Converters are a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over 4.5V to 42V input. The converter can deliver 1.7A, 2.5A or 3.5A and generates output voltages from 0.9V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.1% over -40°C to +125°C. The MAX17543/44/45 uses peak-current-mode control. The device can be operated in pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes.
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Description Datasheet Availability Pricing (USD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Mounting Style
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Output Voltage
Output Current
Number of Outputs
Quiescent Current
Switching Frequency
Minimum Operating Temperature
Maximum Operating Temperature
Series
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Analog Devices / Maxim Integrated Switching Voltage Regulators 2.5A, 60V, Synchronous Buck Regulator
Datasheet
985In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFN-EP-20 Buck 900 mV to 36 V 2.5 A 1 Output 9.5 mA 100 kHz to 2.2 MHz - 40 C + 125 C MAX17543 Tube

Analog Devices / Maxim Integrated Switching Voltage Regulators 2.5A, 60V, Synchronous Buck Regulator
Datasheet
2,120In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT TQFN-EP-20 Buck 900 mV to 36 V 2.5 A 1 Output 9.5 mA 100 kHz to 2.2 MHz - 40 C + 125 C MAX17543 Reel, Cut Tape, MouseReel

Analog Devices / Maxim Integrated Switching Voltage Regulators 4.5V 42V, 3.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
Datasheet
799In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFN-EP-20 Buck 900 mV to 36 V 3.5 A 1 Output 9.5 mA 2.2 MHz - 40 C + 125 C MAX17544 Tray
Analog Devices / Maxim Integrated Switching Voltage Regulators 4.5V 42V, 3.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
Datasheet
2,219In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT TQFN-EP-20 Buck 900 mV to 36 V 3.5 A 1 Output 100 kHz to 2.2 MHz - 40 C + 125 C MAX17544 Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Switching Voltage Regulators 4.5V 42V, 1.7A, High-Efficiency, Synchronous Step-Down DC-DC Converter With Internal Compensation
Datasheet
129In Stock
5,000Expected 2026/08/06
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT TQFN-EP-20 Boost 900 mV to 36 V 1.7 A 1 Output 9.5 mA 2.2 MHz - 40 C + 125 C MAX17545 Reel, Cut Tape, MouseReel

Analog Devices / Maxim Integrated Switching Voltage Regulators 4.5V 42V, 1.7A, High-Efficiency, Synchronous Step-Down DC-DC Converter With Internal Compensation
Datasheet
611Expected 2027/02/01
Min.: 1
Mult.: 1

SMD/SMT TQFN-EP-20 Boost 900 mV to 36 V 1.7 A 1 Output 9.5 mA 2.2 MHz - 40 C + 125 C MAX17545 Tube