Synchronous Step-Down DC-DC Converter
Description
MAX17545
EVALUATION KIT AVAILABLE
4.
5V–42V, 1.
7A, High-Efficiency, Synchronous Step-Down DC-DC Converter
With Internal Compensation
General Description
The MAX17545 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over 4.
5V to 42V input.
The converter can deliver up to 1.
7A and generates output voltages from 0.
9V up to 0.
9 x VIN.
The feedback (FB) voltage is accurate to within ±1.
1% over -40°C to +125°C.
The MAX17545 uses peak-current-mode control.
The device can be operated in pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes.
The device is available in a 20-pin (4mm x 4mm) TQFN package.
Simulation models are available.
Applications
●● Industrial Power Supplies
●● Distributed Supply Regulation
●● High-Voltage Single-Board Systems
●● Base Station Power Supply
●● General-Purpose Point-of-Load
For related parts and recommended products to use with this part, refer to www.
maximintegrated.
com/MAX17545.
related.
Features and Benefits
●● Reduces External Components and Total Cost • No Schottky—Synchronous Operation • Internal Compensation for Any Output Voltage • Built-In Soft-Start • All-Ceramic Capacitors, Compact Layout
●● Reduces Number of DC-DC Regulators to Stock • Wide 4.
5V to 42V Input • Adjustable 0.
9V to 0.
9 x VIN Output • 100kHz to 2.
2MHz Adjustable Switching Frequency with External Synchronization
●● Reduces Power Dissipation • Peak Efficiency > 90% • PFM/DCM Enables Enhanced Light-load Efficiency • 2.
8µA Shutdown Current
●● Operates Reliably in Adverse Industrial Environments • Peak Current-Limit Protection • Built-in Output Voltage Monitoring with RESET • Programmable EN/UVLO Threshold • Monotonic Startup into Prebiased Load • Overtemperature Protection • -40°C to +125°C Operation
Ordering Information appears at end of data sheet.
Typical Application Circuit—5V, 500kHz Switching Frequency
C1 2.
2µF
VIN (6.
5V TO 42V)
C...
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