Universal Microprocessor Power Supply/Controllers

The TCA5600, TCF5600 are versatile power supply control circuits for microprocessor based systems and are mainly intended for automotive applications and battery powered instruments. To cover a wide range of applications, the devices offer high circuit flexibility with a minimum of external components.

Functions included in this IC are a temperature compensated voltage reference, on–chip dc/dc converter, programmable and remote controlled voltage regulator, fixed 5.0 V supply voltage regulator with external PNP power device, undervoltage detection circuit, power–on RESET delay and watchdog feature for safe and hazard free microprocessor operations.

? 6.0 V to 30 V Operation Range

? 2.5 V Reference Voltage Accessible for Other Tasks

? Fixed 5.0 V ± 4 Microprocessor Supply Regulator Including Current

Limitation, Overvoltage Protection and Undervoltage Monitor.

? Programmable 6.0 V to 30 V Voltage Regulator Exhibiting High Peak

Current (150mA), Current Limiting and Thermal Protection.

? Two Remote Inputs to Select the Regulator’s Operation Mode:

OFF = 5.0 V, 5.0 V Standby

Programmable Output Voltage

? Self–Contained dc/dc Converter Fully Controlled by the Programmable

Regulator to Guarantee Safe Operation Under All Working Conditions

? Programmable Power–On RESET Delay

? Watchdog Select Input

? Negative Edge Triggered Watchdog Input

? Low Current Consumption in the VCC1 Standby Mode

? All Digital Control Ports are TTL and MOS–Compatible

Applications Include:

? Microprocessor Systems with E2PROMs

? High Voltage Crystal and Plasma Displays

? Decentralized Power Supplies in Computer Telecom Systems