TC25C25

Features:

`Low Power BICMOS Construction
`Low Supply Current at 20 kHz ............... 1.0mA Typ
`Latch-Up Immunity ................. >500mA on Outputs
`Below Rail Input Protection .............................. 5V
`High Output Drive ................................ 500mA Peak
`Fast Rise/Fall Time ..................... 50nsec @ 1000pF
`High Frequency Operation .................. Up to 1MHz
`Tri-state Sync Pin for Easy Parallel Operation
`Under Voltage Hysteresis Guaranteed
`Shutdown Pin Available
`Double-Ended
`Soft Start, With Small Cap
`Low Prop Delay Shutdown to Output ................................................. 140nsec Typ.


Specifications

Supply Voltage ............................................................18V Maximum Chip Temperature ..................................... 150 Storage Temperature .............................. 65 to +150 Lead Temperature (10 sec) ...................................... 300 Package Thermal Resistance PDIP RqJ-A ............................................................ 125/W PDIP RqJ-C .............................................................. 45/W SOIC RqJ-A ............................................................ 250/W SOIC RqJ-A .............................................................. 75/W Operating Temperature 25C2x ......... 40 TA +85 35C2x ..................................................... 0 TA +70 *Static-sensitive device. Unused devices must be stored in conductivematerial. Protect devices from static discharge and static fields. Stresses above those listed under Absolute Maximum Ratings may cause permanentdamage to the device. These are stress ratings only and functionaloperation of the device at these or any other conditions above thoseindicated in the operational sections of the specifications is not implied.


Description

The TC25C25 family of PWM controllers are CMOS implementations of the industry standard 3525 voltage mode SMPS ICs.

These second generation CMOS devices TC25C25 employ TelCom Semiconductors' Tough BiCMOSÔ process for latch-up proof operation. They offer much lower power consumption than any of their previous CMOS or bipolar counterparts.

These controllers TC25C25 have separate supply pins for the control and output sections of the circuit. This allows "bootstrap" operation.

The CMOS output stage TC25C25 allows the output voltage to swing to within 25mV of either rail. Other improved features include tighter hysteresis and undervoltage start-up specifications over temperature, and very low input bias current on all inputs.