DESCRIPTION
The TK652xx 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 TK652xx 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 1.8, 2.1, or 2.4 V.

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