1

Date: 6/7/06 Rev B

SP6648 Ultra-low Quiescent Current, High Efficiency Boost Regulator

© 2006 Sipex Corporation

SP6648

FEATURES

■ Ultra-low 12μA Quiescent Current

■ Wide Input Operating Voltage: 0.85V 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, PDAs,

MP3 players, and other portable devices. The SP6648 combines the high-load efficiency

associated with PWM control, with 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