DESCRIPTION

The TK65015 Low Power Step-Up DC-DC converter is designed for portable battery powered systems, capable of operating from a single battery cell down to 0.9 V. The output voltage is laser-trimmed to 3.0 V. An internal detector monitors the output voltage and provides an active-low microprocessor reset signal whenever the output voltage falls below an internally preset limit. An internal undervoltage lockout circuit is utilized to prevent the inductor switch from remaining in the "ON" mode when the battery voltage is too low to permit normal operation.

FEATURES

■ 0.9 V Operation

■ Very Low Quiescent Current

■ Internal Bandgap Reference

■ High Efficiency

■ Low Output Ripple

■ Microprocessor Reset Output

■ Laser-Trimmed Output Voltage

■ Undervoltage Lockout

■ Regulation by Pulse Burst Modulation (PBM)

APPLICATIONS

■ Battery Powered Systems

■ Cellular Telephones

■ Pagers

■ Personal Communications Equipment

■ Portable Instrumentation

■ Portable Consumer Equipment

■ Radio Control Systems