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SP6648
(Rev.:2004)

Ultra-low Quiescent Current, High Efficiency Boost Regulator

Signal Processing Technologies 

®

SP6648

Ultra-low Quiescent Current,

High Efficiency Boost Regulator

FEATURES

■ Ultra-low 12µA Quiescent Current

■ 400mA Output Current at 2.6V Input: 3.3VOUT

■ 94% Efficiency from 2 cell to 3.3VOUT

■ 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

VBATT

+

47µF

LBI

LBON

SHDN

1.87K

10µH

SP6648

1

VBATT

VOUT 10

2 LBI

LX 9

3 LBON

PGND 8

4 RLIM

GND 7

5 SHDN

FB 6

3.3VOUT

+ 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

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