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SP6649EU/TR Datasheet

  • SP6649EU/TR

  • Ultra-low Quiescent Current, High Efficiency Boost DC-DC Reg...

  • 9頁

  • SIPEX

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SP6649
Ultra-low Quiescent Current,
High Efficiency Boost DC-DC Regulator
ADVANCED INFORMATION
FEATURES
鈻?/div>
Ultra-low 12碌A(chǔ) Quiescent Current
鈻?/div>
700mA Output Current at 2.6V
IN,
3.3V
OUT
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94% Efficiency Possible
鈻?/div>
Wide Input Voltage Range: 0.85V to 4.5V
鈻?/div>
3.3V Fixed Output and adjustable 2.5V to
5.0V Output Range
鈻?/div>
Internal Synchronous Rectifier for High
Efficiency
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0.3 Charging Switch, 0.3 Synchro-
nous Rectifier
鈻?/div>
Anti-Ringing Inductor Switch
鈻?/div>
Programmable Inductor Peak Current
鈻?/div>
Logic Shutdown Control
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Under Voltage Lock-Out, 0.62V
鈻?/div>
Programmable Low Battery Detect
鈻?/div>
Small 10 pin MSOP Package
V
BATT
LBI
LBON
R
LIM
SHDN
1
2
3
4
Top View
10 pin MSOP
Tja=113擄C/W
10
9
8
7
6
V
OUT
LX
P
GND
GND
FB
5
APPLICATIONS
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Digital Still Cameras
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MP3 Players
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PDA's
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Pagers
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Handheld Portable Devices
鈻?/div>
Medical Monitors
DESCRIPTION
The SP6649 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for
single and dual cell alkaline, or Li-Ion battery applications such as digital still cameras, PDA鈥檚,
MP3 players, and other portable devices. The SP6649 combines the high delivery associated
with PWM control, and the low quiescent current and excellent light-load efficiency of PFM control.
The SP6649 features 12碌A(chǔ) quiescent current, synchronous rectification, a 0.3 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.
VBATT
C1
1
VBATT
LBI
LBON
RLIM
SHDN
VOUT
10
9
8
7
6
L1 10uH
+
3.3Vout
2
3
4
47uF
LBI
LBON
SHDN
RLIM
1.87K
SP6649
LX
PGND
GND
FB
C4
1uF
R1
205K
C3
47pF
+
C2
47uF
5
R2
124K
TBD
Figure 2. Maximum Load Current in Operation
C1 = C2 = Kemet T49C476K010AS, L1 = Sumida CDRH5D28-100
R1 = 374K for 5V
OUT
Figure 1. Typical Application Circuit
Rev:001 Date:11/20/03
SP6649 Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator
漏 Copyright 2002 Sipex Corporation
1

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