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