MAX17573
PRODUCTION4.5V to 60V, 3.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
A High-Efficiency, High-Voltage, Synchronous Step-Down DC-DC Converter with Integrated MOSFETs
- Part Models
- 2
- 1ku List Price
- Starting From $2.57
Overview
- Reduces External Components and Total Cost
- No Schottky-Synchronous Operation
- Internal Loop Compensation
- All-Ceramic Capacitors, Compact Layout
- Reduces Power Dissipation
- Peak Efficiency of 95.4% at VIN = 12V, VOUT = 5V at 500kHz Switching Frequency
- Pin-to-Pin Compatible with MAX17574, and Improved Efficiency through Superior Switching Performance compared to MAX17574
- PFM and DCM Modes Enable Enhanced LightLoad Efficiency
- Auxiliary Bootstrap Supply (EXTVCC) for Improved Efficiency
- 2.8μA Shutdown Current
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 60V Input
- Adjustable Output Voltage Range from 0.9V up to 90% of VIN
- 100kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization
- Operates Reliably in Adverse Industrial Environments
- Built-in Hiccup Mode Overload Protection
- Built-In Output-Voltage Monitoring with RESET
- Programmable EN/UVLO Threshold
- Adjustable and Monotonic Startup with Prebiased
- Overtemperature Protection
The MAX17573 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs that operates over a 4.5V to 60V input. The converter can deliver up to 3.5A 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 ±0.9%.
The device features a peak-current-mode control architecture. An internal transconductance error amplifier produces an integrated error voltage at an internal node, which sets the duty cycle using a PWM comparator, a high-side current-sense amplifier, and a slope-compensation generator. At each rising edge of the clock, the high-side MOSFET turns on and remains on until either the appropriate or maximum duty cycle is reached or the peak current limit is detected. During the high-side MOSFET’s on-time, the inductor current ramps up. During the second half of the switching cycle, the high-side MOSFET turns off and the low-side MOSFET turns on. The inductor releases the stored energy as its current ramps down and provides current to the output.
The device can operate either in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuousconduction mode (DCM) control schemes. 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. An open-drain RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage.
APPLICATIONS
- Factory Automation
- Aftermarket Automotive
- General Point of Load
Documentation
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX17573ATG+ | LFCSP | ||
| MAX17573ATG+T | LFCSP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571D PIN/ERRATA |
||
| MAX17573ATG+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
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Evaluation Kits
Evaluation Kit for the MAX17573 in 5V and 3.3V Output- Voltage Applications
Resources
Evaluation Kit for the MAX17573 in 5V and 3.3V Output- Voltage Applications