General Description
The Himalaya series of voltage regulator ICs, power
modules, and chargers enable cooler, smaller, and
simpler power supply solutions. The MAX17571, a highefficiency,
high-voltage, Himalaya synchronous stepdown
DC-DC converter with integrated MOSFETs
operates over an input voltage range of 4V to 60V. The
converter can deliver up to 1.5A current. Output voltage
is programmable from 0.9V up to 90% of VIN. The
feedback voltage regulation accuracy over -40°C to
+125°C is ±1.2%. Built-in compensation across the
output voltage range eliminates the need for external
compensation components.
The MAX17571 features peak-current-mode control
architecture and operates in fixed frequency forced
pulse-width modulation (PWM) mode. A programmable
soft-start feature allows users to reduce input inrush
current. The device also incorporates an enable/input
undervoltage lockout pin (EN/UVLO) that allows the user
to turn on the part at the desired input voltage level. The
MAX17571 offers a low minimum on time that allows
high switching frequencies and a smaller solution size.
The MAX17571 is available in a 12-pin (3mm x 3mm)
TDFN-EP package. Simulation models are available.

Product Highlights
• Reduces External Components and Total Cost
• No Schottky—Synchronous Operation
• Internal Compensation
• All-Ceramic Capacitors, Compact Layout
• Reduces Number of DC-DC Regulators to Stock
• Wide 4V to 60V Input-Voltage Range
• Adjustable Output Voltage Range from 0.9V up to
90% of VIN
• 400kHz to 2.2MHz Adjustable Switching
Frequency with External Clock Synchronization
• Reduces Power Dissipation
• 94% Peak Efficiency
• External Bias Input for Improved Efficiency
• 4.65μA Shutdown Current
• Operates Reliably in Adverse Industrial
Environments
• Built-in Hiccup Mode Overload Protection
• Built-in Output-Voltage Monitoring with RESET
• Adjustable Soft-Start
• Programmable EN/UVLO Threshold
• Monotonic Startup into Prebiased Output Voltage
• Overtemperature Protection
• CISPR 32 Class B Compliant