• Wide Input Voltage Range: 7.5V-150V
• Dual Output Current Capability: VDD1 Buck1: Continuous 200mA @VDD1=12.5V 3V3 Buck2: Continuous 400mA / Pulsed 800mA
• Constant On-Time Control
• Switching Frequency VDD1 Buck1: Programmable 350 kHz~650 kHz 3V3 Buck2: Fixed 1MHz
• ±2% 3.3V Output Accuracy Over -40℃ to +125℃ Temperature Range
• Internal Soft-Start Limits Inrush Current
• High Source/Sink Current: 3A/3A
• CMOS/TTL Compatible Input Versions
• 5.7ns Rise and 4ns Fall Time with 1000pF
• Fast Propagation Delay Times
• 5ns Delay Matching
• Charge Pump Current capability: ≥25mA
• Compact package: QFN5x5-24 

The SQ37509 is a dual-output Buck converter and highspeed half-bridge MOS driver with a charge pump function. The Buck converter operates over an input voltage range of 7.5V to 150V. The dual output can provide either 12.5V/200mA or 3.3V/400mA current capability. The SQ37509 integrates a high-voltage floating driver for directly driving high-side and low-side channels. The floating channel can drive a 150V N-channel MOSFET in a high-side configuration. The input logic level is compatible with standard CMOS or TTL. A charge pump circuit is utilized to ensure the complete turn-on of the high-side MOSFET. This device is available in a QFN5x5-24 package.