DESCRIPTION
The TK651xx 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 TK651xx provides the power switch and the control circuit for a boost converter. The converter takes a DC input and boosts it up to a regulated 2.7, 3.0 or 3.3 V output .

FEATURES
■ Guaranteed 0.9 V Operation
■ Very Low Quiescent Current
■ Internal Bandgap Reference
■ High Efficiency MOS Switching
■ Low Output Ripple
■ Microprocessor Reset Output
■ Laser-Trimmed Output Voltage
■ Laser-Trimmed Oscillator
■ 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