36V 5A synchronous Step-down converter with dual-channel current limit

ELM615DA is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated high-side and low-side power MOSFETs. ELM615DA uses proprietary constant on-time (COT) control to provide excellent line and load transient response. ELM615DA features slew rate control and spread spectrum frequency modulation to minimize EMI/EMC emissions. With wide input range from 4V to 36V, the converter can deliver output voltage ranging from 0.8V to VIN with up to 5A continuous output current. The converter can be configured as single output or dual outputs with independent constant current (CC) regulation for each output. In the event of output overload or short circuit, the converter will be into hiccup mode. Other protection features include cycle-by-cycle current limit, input under and over voltage protection and thermal shutdown. ELM615DA also provides programmable cable voltage drop compensation by selecting an appropriate external resistor of the divider net work divider. Switching frequency is internally set to 180kHz. ELM615DA is available in SOP-8_EP package.

Input voltage range4V to 36V
Output current5A
Overcurrent protectionSwitch cycle
Built-in wiring resistance voltage drop compensation circuit
Short circuit protectionHiccup mode
Overheat protection155°C
Spread spectrum switching180kHz 6% FM spread
Integrated switch on resistor40mΩ high side/
40mΩ low side
Minimum on time70nsec
Show datasheet
Data sheetELM615DA
Dual-port car charger
Automotive and Industrial Supplies
Point of Load

Absolute Maximum Ratings

Supply voltage Vin to GNDVin+39V
PGND-GND Supply voltagVpgnd-0.3 to +0.3V
SW-GND Supply voltagVsw-0.3 to Vin+0.3V
SW-GND Surge voltage (30ns)Vsw_S-3 to Vin+3V
BST-SW Supply voltageVbst-0.3 to +6.0V
All Other Pins to GNDVall-0.3 to +6.0V
Lead temperatureTL+260°C
Junction temperatureTj+150°C
Storage temperature rangeTstg-65 to +150°C
Thermal resistanceθja51°C/W
Thermal resistanceθjc13°C/W
Power dissipationPd2.1W

Block diagram