16-Output Switch with SPI and PWM Control

The 33999 is a 16-output low-side switch with a 24-bit serial input control. It is designed for a variety of applications including inductive, incandescent, and LED loads. The Serial Peripheral Interface (SPI) provides both input control and diagnostic readout. Eight parallel inputs are also provided for direct Pulse Width Modulation (PWM) control of eight dedicated outputs. Additionally, an output-programmable PWM input provides PWM of any combination of outputs. A dedicated reset input provides the ability to clear all internal registers and turn all outputs off.

FEATUREs
• Designed to Operate 5.0 V < VPWR < 27 V
• 24-Bit SPI for Control and Fault reporting, 3.3 V/5.0 V Compatible
• Outputs Are Current Limited (0.9 A to 2.5 A) to Drive Incandescent Lamps
• Output Voltage Clamp of +50 V During Inductive Switching
• On/Off Control of Open Load Detect Current (LED Application)
• VPWR Standby Current < 10 µA
• RDS(ON) of 0.55 Ω at 25°C Typical
• Independent Overtemperature Protection
• Output Selectable for PWM Control
• Output ON Short-to-VBAT and OFF Short-to-Ground/Open Detection
• 54-Pin Exposed Pad Package for Thermal Performance
• Pb-Free Packaging Designated by Suffix Code EK