MAX17552AUB+

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power-supply solutions. The MAX17552/ MAX17552A/MAX17552B high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converters with integrated MOSFETs operate over a 4V to 60V input voltage range. The converters can deliver output current up to 100mA at output voltages of 0.8V to 0.9×VIN. The output voltage is accurate to within ±1.75% over the -40°C to +125°C temperature range. The devices employ a peak-current-mode control architecture with a MODE pin that can be used to operate the device in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads and is useful in applications sensitive to variable switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency. The converters consume only 22μA of no-load supply current in PFM mode. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify PCB layout. The devices offer programmable switching frequency to optimize solution size and efficiency. Programmable soft-start allows the user to reduce the inrush currents. During overload, the MAX17552/MAX17552B implements a hysteretic cycle-by-cycle peak-current-limit protection scheme, while the MAX17552A implements a HICCUP-type overload protection scheme to protect the inductor and the internal FETs. An EN/UVLO pin allows the user to turn on/off the device at the desired input-voltage level. An open-drain RESET pin allows output-voltage monitoring. The devices operate over the -40°C to +125°C industrial temperature range and is available in a compact 10-pin (3mm×2mm) TDFN/TDFN-CU and 10-pin (3mm×3mm) μMAX packages. Simulation models are available.

Applications

• Industrial Sensors and Process Control
• 4mA–20mA Current-Loop Powered Sensors
• High-Voltage LDO Replacement
• Battery-Powered Equipment
• HVAC and Building Control
• General-Purpose Point of Load

Key features

• No Schottky—Synchronous Operation for High Efficiency and Reduced Cost
• Internal Compensation
• Fixed Internal 5.1ms or Programmable Soft-Start
• All-Ceramic Capacitors, Ultra-Compact Layout
• Reduces Number of DC-DC Regulators to Stock
• Wide 4V to 60V Input Voltage Range
• Adjustable 0.8V to 0.9×VIN Output Voltages
• Delivers Up to 100mA Load Current
• 100kHz to 2.2MHz Adjustable Switching Frequency Range with External Clock Synchronization
• Configurable Between PFM and Forced-PWM Modes
• Reduces Power Dissipation
• 22μA No Load Supply Current
• Peak Efficiency >90%
• PFM Feature for High Light-Load Efficiency
• 1.2μA (typ) Shutdown Current
• Operates Reliably in Adverse Industrial Environments
• Peak Current-Limit Protection
• Built-In Output-Voltage Monitoring with Open-Drain RESET Pin
• Programmable EN/UVLO Threshold
• Monotonic Startup into Prebiased Output
• Overtemperature Protection
• High Industrial -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range