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参数资料
| 型号： | SP6137LEDEB |
| 厂商： | Exar Corporation |
| 文件页数： | 1/15页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR SP6137LED |
| 标准包装： | 1 |
| 系列： | * |
S P 6 1 3 7
W i d e I n p u t , 9 0 0 k H z S y n c h r o n o u s P W M S t e p D o w n
C o n t r o l l e r
January 2009
GENERAL DESCRIPTION
The SP6137 is a 900kHz constant frequency,
voltage mode, synchronous PWM step down
controller optimized for high efficiency.
The SP6137 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 SP6137 can accommodate type
II and type III compensation schemes.
Protection features include a programmable
UVLO, thermal shutdown and output short
circuit protection.
The SP6137 is part of a larger family of step
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 SP6139 for
complete details.
The SP6137 is available in lead free, RoHS
compliant, space saving 10-pin MSOP
package.
Rev. 2.0.0
APPLICATIONS
? 12V DPA
? Communications Systems
? Graphics Cards
FEATURES
? 2.5V to 20V Step Down Achieved Using
Dual Input
? On-Board 1.5 Ω sink (2 Ω source) NFET
Drivers
? Up to 10A Output Capability
? UVLO Detects Both VCC and VIN
? Short-Circuit Protection with Auto-
Restart
? Supports Type II or III Compensation
? Programmable Soft Start
? Fast Transient Response
? High Efficiency: Greater than 94%
? Non-synchronous Start-Up
? Small 10-Pin MSOP Package
? U.S. Patent #6,922,041
TYPICAL APPLICATION DIAGRAM
VIN
2.5V -20V
V CC = 5V @ 30mA
8 7 6 5
C1
22 μ F
16V
C2
22 μ F
16V
RLF
3.0,5%
QT
4
1 2 3
FDS6676S
14.5A, 6m Ω
C1, C2
Ceramic
1210
GND
CBST
0.1 μ F
X5R
GH 9
R3
221k, 1%
UV IN
R4
100k, 1%
DBST
MBR0530
C VCC GND 3
10 μ F
6.3V
C VCC
Ceramic
8050
X5R
0.8V
1
2
3
4
5
GL
U1
VCC BST 10
SP6137
GND SWN 8
VFB SS 7
COMP UVIN 6
CZ2 RZ2
820pF 40.2k, 1%
CP1
R5
Bead
SS
CSS
47nF
8 7 6 5
QB
4
1 2 3
FDS6676S
14.5A, 6.0m Ω
L1 SC5018-2R7M
2.7 μ H @ 12A
DCR=4.30m Ω
C3 C4
47 μ F 47 μ F
6.3V 6.3V
GND2
C3, C4
Ceramic
RZ3
4.64k, 1%
CZ3
220pF
V OUT ≤ VIN
3.3V @ 10A
R1
68.1k, 1%
R2
21.5k, 1%
CF1
100pF
56pF
Fig. 1: SP6137 Application Diagram
1210
X5R
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
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