AP1603 Datasheet | Diodes Incorporated

Description The AP1603 is a high efficiency step-up DC-DC converter for applications using as few as a single Ni MH or Li-Ion battery cells. Only four external ponents are required to deliver a fixed output voltage of 3.3V. The AP1603 starts up from less than 0.9V input with 1m A load. Pulse Frequency Modulation scheme brings optimized performance for applications with light output loading and low input voltages. The output ripple and noise are lower pared with the circuits operating in PSM mode. Pin Assignments ( Top View ) FB 1 6 SHDN GND 2 AP1603 5 OUT The PFM control circuit operating in 150k Hz (max.) switching rate results in smaller passive ponents. The space saving SOT26 packages make the AP1603 an ideal choice of DC-DC converter for space conscious applications, like pagers, electronic cameras, and wireless microphones. REF 3 74 LX SOT26 Features - A Guaranteed Start-Up from less than 0.9 V - High Efficiency - Low Quiescent Current - Less Number of External ponents needed - Low Ripple and Low Noise - Space Saving Lead Free Package: SOT26 - Available in Green molding - Totally Lead-Free & Fully Ro HS pliant (Notes 1 & 2) - Halogen and Antimony Free. “Green” Device (Note 3) Applications - Pagers - Cameras - Wireless Microphones - Pocket Organizers - Battery Backup Suppliers - Portable Instruments Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (Ro HS) & 2011/65/EU (Ro HS 2) pliant. 2. See http://.diodes./quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony pounds. Typical Applications Circuit (1) VOUT = 5V 1.1V to 5.5V VIN ON OFF + 47u F 0.1u F 22u H SHDN...