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SP6650EU/TR Datasheet

  • SP6650EU/TR

  • High Efficiency 600mA Synchronous Buck Regulator Ideal for p...

  • 17頁

  • SIPEX

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廬
SP6650
Ideal for portable designs powered with Li Ion battery
High Efficiency 600mA Synchronous Buck Regulator
FEATURES
鈻?/div>
95% High Efficiency
鈻?/div>
Proprietary Control Loop
鈻?/div>
2.7V to 6.5V Input Voltage Range
鈻?/div>
3.3V or Adjustable Output Voltage
Range
鈻?/div>
2% Output Voltage Accuracy
鈻?/div>
600mA Output Current
鈻?/div>
100% Duty Cycle Operation
鈻?/div>
Programmable Inductor Peak Current
Limit (0.95A or 0.5A)
鈻?/div>
No External FET's Required
鈻?/div>
3V Battery Low Indicator
鈻?/div>
2.7V Undervoltage Lockout
鈻?/div>
Shutdown Control
鈻?/div>
Small 10-Pin MSOP
PV
IN
1
V
IN
2
BLON
3
I
LIM
4
SHDN
5
10
LX
SP6650
10 Pin MSOP
9
PGND
8
GND
7
V
OUT
6
FB
Now Available in Lead Free Packaging
APPLICATIONS
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PDA
鈻?/div>
CD Player
鈻?/div>
ADSL Modem
鈻?/div>
Digital Still Camera
DESCRIPTION
The SP6650 is ideal for portable applications that use a Li-Ion or 3 to 4 cell alkaline/NiCd/NiMH
input. The SP6650 extends battery life with it鈥檚 unique control loop scheme (patent pending),
which maintains high efficiency levels (> than 90%) over a wide range of output currents. Features
such as Inductor peak current control, protects the power supply from overload or short circuit
conditions, controls the startup current to prevent output overshoot and excessive battery drop,
and gives the user more flexibility in choosing an appropriate coil to optimize solution cost, size
and performance. Other features include a dedicated pin for manual shutdown, a battery low
indicator, and thermal protection.
TYPICAL APPLICATIONS CIRCUIT
2.7-6.5 VDC
廬
L1 22碌H
LX
1
RB
100k鈩?/div>
PV
IN
V
IN
BLON
I
LIM
SHDN
10
9
8
7
6
C4
470pF
V
OUT
3.3V or 1.25V
to 5.0V
2
R1
10鈩?/div>
PGND
3
4
5
SP6650
GND
V
OUT
FB
R4
100k鈩?/div>
C1
1碌F
C2
47碌F
R2
164k
C3
47碌F
R3
100k
Date: 5/25/04
SP6650 High Efficiency 600mA Synchronous Buck Regulator
漏 Copyright 2004 Sipex Corporation
1

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