1

Date: 7/19/04

SP6648 Ultra-low Quiescent Current, High Efficiency Boost Regulator

© Copyright 2004 Sipex Corporation

SP6648

FEATURES

■ Ultra-low 12µA Quiescent Current

■ 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

Ultra-low Quiescent Current,

High Efficiency Boost Regulator

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.

®

205K

10µH

47µF

SP6648

LBON

SHDN

FB

LX

LBI

GND

47pF

47µF

1µF

+

10

9

8

7

6

+

LBI

SHDN

1.87K

1

2

3

4

5

LBON

124K

TYPICAL APPLICATION CIRCUIT

0

50

100

150

200

250

300

350

400

450

500

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

Vin (V)

Vout=3.3V, Ipk=0.85A

Vout=5.0V, Ipk=0.85A

Maximum Load Current in Operation

SP6648

10 Pin DFN

10

9

8

7

6

1

2

3

4

5

VBATT

LBI

LBON

RLIM

SHDN

V

OUT

LX

P

GND

GND

FB

Now Available in Lead Free Packaging