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SP6649

Sipex
Part Number SP6649
Manufacturer Sipex
Description Ultra-low Quiescent Current / High Efficiency Boost DC-DC Regulator
Published Jun 7, 2005
Detailed Description ® SP6649 Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator ADVANCED INFORMATION FEATURES ■ Ultra-low...
Datasheet PDF File SP6649 PDF File

SP6649
SP6649

Overview
® SP6649 Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator ADVANCED INFORMATION FEATURES ■ Ultra-low 12µA Quiescent Current ■ 700mA Output Current at 2.
6VIN, 3.
3VOUT ■ 94% Efficiency Possible ■ Wide Input Voltage Range: 0.
85V to 4.
5V ■ 3.
3V Fixed Output and adjustable 2.
5V to 5.
0V Output Range ■ Internal Synchronous Rectifier for High Efficiency ■ 0.
3 Charging Switch, 0.
3 Synchronous Rectifier ■ Anti-Ringing Inductor Switch ■ Programmable Inductor Peak Current ■ Logic Shutdown Control ■ Under Voltage Lock-Out, 0.
62V ■ Programmable Low Battery Detect ■ Small 10 pin MSOP Package VBATT LBI LBON 1 2 3 Top View 10 pin MSOP Tja=113°C/W 10 9 8 7 6 VOUT LX PGND GND FB RLIM 4 SHDN 5 APPLICATIONS ■ Digital Still Cameras ■ MP3 Players ■ PDA's ■ Pagers ■ Handheld Portable Devices ■ Medical Monitors DESCRIPTION The SP6649 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for single and dual cell alkaline, or Li-Ion battery applications such as digital still cameras, PDA’s, MP3 players, and other portable devices.
The SP6649 combines the high delivery associated with PWM control, and the low quiescent current and excellent light-load efficiency of PFM control.
The SP6649 features 12µA quiescent current, synchronous rectification, a 0.
3 charging switch, anti-ringing inductor switch, programmable low battery detect, under-voltage lockout and programmable inductor peak current.
The device can be controlled by a 1nA active LOW shutdown pin.
VBATT C1 1 VBATT LBI LBON RLIM SHDN VOUT 10 9 8 7 6 L1 10uH + 3.
3Vout 2 3 4 47uF LBI LBON SHDN RLIM 1.
87K SP6649 LX PGND GND FB C4 1uF R1 205K C3 47pF + C2 47uF 5 R2 124K TBD Figure 2.
Maximum Load Current in Operation C1 = C2 = Kemet T49C476K010AS, L1 = Sumida CDRH5D28-100 R1 = 374K for 5VOUT Figure 1.
Typical Application Circuit Rev:001 Date:11/20/03 SP6649 Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator © Copyright 2002 Sipex Corporation 1 ABSOLUTE MA...


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