SP6648 查看數據表（PDF） - Signal Processing Technologies

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SP6648

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 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

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, 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.

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: 6/7/06 Rev B

SP6648 Ultra-low Quiescent Current, High Efficiency Boost Regulator

1

© 2006 Sipex Corporation

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