TL496C, TL496Y 9-V POWER-SUPPLY CONTROLLERS

SLVS012B - AUGUST 1978 - REVISED AUGUST 1995

features

• Internal Step-Up Switching Regulator
• Fixed 9-V Output
• Charges Battery Source During Transformer-Coupled-Input Operation
• Minimum External Components Required (1 Inductor, 1 Capacitor, 1 Diode)
• 1- or 2-Cell-Input Operation

description

The TL496C power-supply control circuit is designed to provide a 9-V regulated supply from a variety of input sources. Operable from a 1- or 2-cell battery input, the TL496C performs as a switching regulator with the addition of a single inductor and filter capacitor. When ac coupled with a step-down transformer, the TL496C operates as a series regulator to maintain the regulated output voltage and, with the addition of a single catch diode, time shares to recharge the input batteries.

The design of the TL496C allows minimal supply current drain during standby operation (125 uA typical). With most battery sources, this allows a constant bias to be maintained on the power supply. This makes power instantly available to the system, thus eliminating power-up sequencing problems.

View more information about generic part numbers:TL496

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