SP6648 Datasheet, PDF (1/16 Pages) Sipex Corporation – Ultra-low Quiescent Current, High Efficiency Boost Regulator

®
SP6648
Ultra-low Quiescent Current,
High Efficiency Boost Regulator
FEATURES
■ Ultra-low 12µA Quiescent Current
■ 400mA Output Current at 2.6V Input: 3.3V_OUT
■ 94% Efficiency from 2 cell to 3.3V_OUT
■ Wide Input Voltage Range: 0.95V to 4.5V
■ 3.3V Fixed or Adjustable Output
■ Integrated Synchronous Rectifier: 0.3Ω
■ 0.3Ω Switch
■ Anti-Ringing Switch Technology
■ Programmable Inductor Peak Current
■ Logic Shutdown Control
■ Under Voltage Lock-Out at 0.61V
■ Programmable Low Battery Detect
■ Single or Dual Cell Alkaline
■ Small 10 pin DFN Package and Industry
Standard 10 pin MSOP
VBATT 1
LBI 2
LBON 3
RLIM 4
SHDN 5
SP6648
10 Pin DFN
10 VOUT
9 LX
8 PGND
7 GND
6 FB
Now Available in Lead Free Packaging
APPLICATIONS
■ Camera Flash LED Driver
■ Wireless Mouse
■ PDA's
■ Pagers
■ Medical Monitors
■ Handheld Portable Devices
■ MP3 Players
DESCRIPTION
The SP6648 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for
single cell, dual cell alkaline and Li-Ion battery applications such as digital still cameras, PDA’s,
MP3 players, and other portable devices. The SP6648 combines the high delivery associated
with PWM control, and the low quiescent current and excellent light-load efficiency of PFM control.
The SP6648 features 12µA quiescent current, synchronous rectification, a 0.3Ω 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.
TYPICAL APPLICATION CIRCUIT
V_BATT
+
47µF
LBI
LBON
SHDN
1.87K
10µH
SP6648
1
V_BATT
V_OUT ¹⁰
2 _LBI
LX 9
3 _LBON
P_GND ⁸
4 _RLIM
GND ⁷
5 _SHDN
FB ⁶
3.3V_OUT
+ _47µF
1µF
205K
47pF
124K
500
450
400
350
300
250
200
150
100
Vout=3.3V, Ipk=0.85A
50
Vout=5.0V, Ipk=0.85A
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Vin (V)
Maximum Load Current in Operation
Date: 7/19/04
SP6648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
1
© Copyright 2004 Sipex Corporation