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SP6137EU-L/TR

更新时间： 2024-11-25 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
15页	707K
描述
Wide Input, 900kHz Synchronous PWM Step Down Controller

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中文翻译

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数据手册

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SP6137EU-L/TR 数据手册

SP6137

Wide Input, 900kHz Synchronous PWM Step Down

Controller

January 2009

Rev. 2.0.0

GENERAL DESCRIPTION

APPLICATIONS

The SP6137 is a 900kHz constant frequency,

voltage mode, synchronous PWM step down

controller optimized for high efficiency.

• 12V DPA

• Communications Systems

• Graphics Cards

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.

FEATURES

• 2.5V to 20V Step Down Achieved Using

Dual Input

• On-Board 1.5Ω sink (2Ω source) NFET

Drivers

• Up to 10A 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 SP6137 is part of a larger family of step

• Supports Type II or III Compensation

• Programmable Soft Start

down

controllers

operating

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.

• Fast Transient Response

• High Efficiency: Greater than 94%

• Non-synchronous Start-Up

• Small 10-Pin MSOP Package

• U.S. Patent #6,922,041

The SP6137 is available in lead free, RoHS

compliant,

space

saving

10-pin

MSOP

package.

TYPICAL APPLICATION DIAGRAM

2.5V -20V

22μF

7 6 5

16V

= 5V @ 30mA

FDS6676S

14.5A, 6mΩ

GND

C1, C2

RLF

3.0,5%

2 3

Ceramic

1210

X5R

CBST

0.1μF

DBST

OUT

≤

MBR0530

L1 SC5018-2R7M

2.7μH @ 12A

DCR=4.30mΩ

3.3V @ 10A

RZ3

7 6 5

Bead

VCC

BST

4.64k, 1%

SP6137

C_VCC

10μF

GND 3

47μF

GND

VFB

COMP

SWN

68.1k, 1%

6.3V

CZ3

220pF

221k, 1%

6.3V

0.8V

2 3

UVIN

FDS6676S

14.5A, 6.0mΩ

C_VCC

CSS

47nF

GND2

Ceramic

8050

CZ2

RZ2

820pF 40.2k, 1%

CP1

100k, 1%

21.5k, 1%

X5R

C3, C4

Ceramic

1210

CF1

100pF

56pF

X5R

Fig. 1: SP6137 Application Diagram

Exar Corporation

48720 Kato Road, Fremont CA 94538, USA

www.exar.com

Tel. +1 510 668-7000 – Fax. +1 510 668-7001

12 3 4 5 6 7...15

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