42V, 100mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter with 22µA No-Load Supply Current

The MAX17532 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4V to 42V input. The converter can deliver up to 100mA and generates output voltages from 0.8V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.75% over -40°C to +125°C.

The MAX17532 uses peak-current-mode control and can be operated in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) modes.

The device is available in a 10-pin (3mm x 2mm) TDFN and 10-pin (3mm x 3mm) µMAX® packages. Simulation models are available.

* Reduces External Components and Total Cost

* No Schottky–Synchronous

* Internal Compensation for Any Output Voltage

* Built-In Soft-Start

* All-Ceramic Capacitors, Compact Layout

* Reduces Number of DC-DC Regulators to Stock

* Wide 4V to 42V Input

* Adjustable 0.8V to 0.9 x VIN Output

* 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization

* Reduces Power Dissipation

* 22µA Quiescent Current

* Peak Efficiency > 90%

* PFM Enables Enhanced Light-Load Efficiency

* 1.2µA Shutdown Current

* Operates Reliably in Adverse Environments

* Peak Current Limit Protection

* Built-In Output Voltage Monitoring Active-Low RESET

* Programmable EN/UVLO Threshold

* Monotonic Startup Into Prebiased Load

* Overtemperature Protection

* -High Industrial -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150° C Junction Temperature Range