Analog Devices / Maxim Integrated MAX17793 DC-DC Converters
Analog Devices MAX17793 DC-DC Converters are high-efficiency, high-voltage, synchronous step-down DC-DC converters with integrated MOSFETs. The MAX17793 operates from a 3V to 80V input voltage range and supplies up to 3A current. The device also generates output voltages ranging from 0.6V up to 90% of VIN.
The Analog Devices MAX17793 offers a MODE/SYNC pin that can be used to program in forced pulse-width modulation (PWM) or switching frequency modulation (SFM) modes of operation and to synchronize the internal clock to an external clock. The device supplies an enable/ input undervoltage lockout (EN/UVLO) pin to program the selected input voltage at which the converter turns on/off. The device also has a soft-start (SS) pin to reduce inrush currents during startup. Furthermore, the MAX17793 supplies a RESET/TJ pin, which can be utilized to monitor the status of output voltage or die temperature. The die temperature monitor lets the user measure the silicon die temperature directly instead of relying on theoretical estimation, creating a robust, reliable power supply design.
Features
- Reduces solution size and cost
- No Schottky-synchronous operation
- Internal compensation components
- All-ceramic capacitors, compact layout
- Adjustable output range from 0.6V to 90% of VIN
- 300kHz to 1.5MHz adjustable frequency with external clock synchronization
- EMI with symmetrical IN pins
- 4mm x 4mm 18L-FC2QFN
- Peak efficiency of 91% (VIN = 48V and VOUT = 5V)
- Enhanced light-load efficiency with Switching Frequency Modulation (SFM) mode
- Reduces power dissipation
- External bias input for improved efficiency
- Die temperature monitoring
- Operates reliably in adverse industrial environments
- Built-in hiccup-mode overload protection
- Programmable soft-start
- Built-in output-voltage monitoring with RESET/TJ pin
- Programmable EN/UVLO threshold
- Complies with CISPR32 (EN55032) class B conducted and radiated emissions
- High industrial -40°C to +125°C ambient operating temperature range/-40°C to +150°C junction temperature range
Applications
- Industrial, avionics, and heavy equipment
- Factory and building automation
- Motor control
- General purpose power supply
SIMPLIFIED APPLICATION DIAGRAM
