GENERAL DESCRIPTION

The TC170 brings low-power CMOS technology to the current-mode-switching power supply controller market. Maximum supply current is 3.8 mA. Bipolar current-mode control integrated circuits require five times more operating current.

The dual totem-pole CMOS outputs drive power MOSFETs or bipolar transistors. The 50nsec typical output rise and fall times (1000pF capacitive loads) minimize MOSFET power dissipation. Output peak current is 300mA.

FEATURES

■ Low Supply Current With

CMOS Technology ................................. 3.8mA Max

■ Internal Reference .............................................5.1V

■ Fast Rise/Fall Times (CL = 1000pF) ............. 50nsec

■ Dual Push-Pull Outputs

■ Direct-Power MOSFET Drive

■ High Totem-Pole Output Drive .................... 300mA

■ Differential Current-Sense Amplifier

■ Programmable Current Limit

■ Soft-Start Operation

■ Double-Pulse Suppression

■ Undervoltage Lockout

■ Wide Supply Voltage Operation ............... 8V to16V

■ High Frequency Operation ..........................200kHz

■ Available with Low OFF State Outputs

■ Low Power, Pin-Compatible Replacement for UC3846