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SP6139EU-L PDF预览

SP6139EU-L

更新时间： 2024-11-28 06:13:07
品牌 Logo 应用领域
艾科嘉 - EXAR 开关光电二极管控制器
页数 文件大小 规格书
16页 706K
描述
Wide Input, 1.3MHz Synchronous PWM Step Down Controller

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SP6139EU-L 数据手册

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SP6139  
Wide Input, 1.3MHz Synchronous PWM Step Down  
Controller  
January 2009  
Rev. 2.0.0  
GENERAL DESCRIPTION  
APPLICATIONS  
The SP6139 is a 1300kHz constant frequency,  
voltage mode, synchronous PWM step down  
controller optimized for high efficiency.  
• DSL Modems  
• Set-Top Boxes  
• 12V VIN Point of Load Applications  
The SP6139 is adequately suited for split plane  
applications utilizing a low power 5V rail to  
power the controller circuitry, minimizing  
power dissipation. Its wide input voltage range  
of 3V to 15V allows for conversions from the  
standard 3.3V, 5V, 9.6V and 12V power rails  
to an output voltage adjustable down to 0.8V.  
Developed around a wide bandwidth internal  
amplifier, the SP6139 can accommodate type  
II and type III compensation schemes.  
FEATURES  
• 2.5V to 20V Step Down Achieved Using  
Dual Input  
• On-Board 1.5Ω sink (2Ω source) NFET  
Drivers  
• Up to 7A Output Capability  
• UVLO Detects Both VCC and VIN  
Protection features include a programmable  
UVLO, thermal shutdown and output short  
circuit protection.  
• Short-Circuit Protection with Auto-  
Restart  
The SP6139 is part of a larger family of step  
• Supports Type II or III Compensation  
• Programmable Soft Start  
down  
controllers  
operating  
at  
various  
switching frequencies up to 1300kHz and input  
voltages up to 28V. Refer to Exar’s SP6132,  
SP6132H, SP6134, SP6134H and SP6137 for  
complete details.  
• Fast Transient Response  
• High Efficiency: Greater than 94%  
• Non-synchronous Start-Up  
• Small 10-Pin MSOP Package  
• U.S. Patent #6,922,041  
The SP6139 is available in lead free, RoHS  
compliant,  
space  
saving  
10-pin  
MSOP  
package.  
TYPICAL APPLICATION DIAGRAM  
V
IN  
12V  
C1  
22μF  
8
7
16V  
V
= 5V @ 30mA  
CC  
Si4922DY  
8.3A, 18mΩ  
QT  
2
GND  
C1, C2  
RLF  
3.0,5%  
1
Ceramic  
1210  
X5R  
CBST  
L1 SD25-2R2  
0.1μF  
2.2μH @ 2.8A  
DCR=31mΩ  
U1  
DBST  
V
V
IN  
OUT  
≤
MBR0530  
R5  
5
6
3.3V @ 2A  
RZ3  
1
2
3
4
5
10  
9
Bead  
VCC  
BST  
2.26k, 1%  
SP6139  
CVCC  
10μF  
C3  
C4  
GND 3  
GH  
GL  
Si4922DY  
8.3A, 18mΩ  
R1  
QB  
4
47μF  
47μF  
8
GND  
VFB  
COMP  
SWN  
SS  
68.1k, 1%  
6.3V  
6.3V  
CZ3  
220pF  
R3  
150k, 1%  
6.3V  
7
SS  
0.8V  
3
6
UVIN  
CVCC  
Ceramic  
8050  
UV  
IN  
CSS  
47nF  
GND2  
CZ2  
RZ2  
R2  
1.2nF 12.7k, 1%  
CP1  
R4  
100k, 1%  
21.5k, 1%  
X5R  
C3, C4  
Ceramic  
1210  
CF1  
100pF  
39pF  
X5R  
Fig. 1: SP6139 Application Diagram  
Exar Corporation  
48720 Kato Road, Fremont CA 94538, USA  
www.exar.com  
Tel. +1 510 668-7000 – Fax. +1 510 668-7001  
1234567...16

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