SP6648EU-L Datasheet, PDF (1/34 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 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
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: 6/7/06 Rev B
SP6648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
1
© 2006 Sipex Corporation