可编程软启动宽4.75V至23V输入CXSD62226A效率93%单片同步稳压器电流模式控制提供快速的瞬态响应和逐周电流限制

一,产品概述(General Description)         

        The CXSD62226A is a monolithic synchronous buckregulator. The

 device integrates two 130mΩ  SFETs, and provides2A of continuous 

load current over a wide input voltage of 4.75V to 23V.Current 

mode control provides fast transientresponse and cycle-by-cycle current limit.An adjustable soft-start prevents inrush current at turn on, and inshuJTMLown mode the supply current drops to 1μA.This device, available in an SOP8 package, provides 
a very compactsolution with minimal external components
二.产品特点(Features)
* 2AOutput Current
* Wide 4.75V to 23V Operating Input Range
* Integrated 130mΩ Power MOSFET Switches
* Output Adjustable from 0.923V to 20V
* Up to 93% Efficiency
* Programmable Soft-Start
* Stable with Low ESR Ceramic Output Capacitors
* Fixed 340KHz Frequency
* Cycle-by-Cycle Over Current Protection
* Input Under Voltage Lockout
三,应用范围 (Applications)
* Distributed Power Systems
* Networking Systems
* FPGA, DSP, ASIC Power Supplies
* Green Electronics/ Appliances
* Notebook Computers
四.下载产品资料PDF文档 

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五,产品封装图 (Package)

六.电路原理图
(责任编辑：oumao18)

Parameters

Symbol

Test Condition

Min.

Typ.

Max.

Unit

ShuJTMLown Supply Current

VEN = 0V

1

3.0

μA

Supply Current

VEN = 2.0V; VFB =
1.0V

1.3

1.5

mA

Feedback Voltage

VFB

4.75V ≤ VIN ≤ 20V

0.900

0.923

0.946

V

Feedback Overvoltage Threshold

1.1

V

Error Amplifier Voltage Gain *

AEA

400

V/V

Error Amplifier Transconductance

GEA

∆IC = ±10μA

800

μA/V

High-Side Switch On Resistance *

RDS(ON)1

130

mΩ

Low-Side Switch On Resistance *

RDS(ON)2

130

mΩ

High-Side Switch Leakage
Current

VEN = 0V, VSW = 0V

10

μA

Upper Switch Current Limit

Minimum Duty Cycle

2.4

3.4

A

Lower Switch Current Limit

From Drain to Source

1.1

A

COMP to Current Sense
Transconductance

GCS

3.5

A/V

Oscillation Frequency

Fosc1

340

KHz

Short Circuit Oscillation
Frequency

Fosc2

VFB = 0V

100

KHz

Maximum Duty Cycle

DMAX

VFB = 1.0V

90

%

Minimum On Time *

220

ns

EN ShuJTMLown Threshold Voltage

VEN Rising

1.1

1.5

2.0

V

EN ShuJTMLown Threshold Voltage
Hysteresis

210

mV

EN Lockout Threshold Voltage

2.2

2.5

2.7

V

EN Lockout Hysterisis

210

mV

PWM Buck Converter（synchronous)

Part No.

Input

Output Voltage

Current

Frequency

Efficiency

Package

Precision

OCP

OTP

SP

Voltage

MAX

CXSD62225

40V

ADJ

600mA

1/2MHZ

85%

SOT23-6

2%

Y

Y

Y

CXSD62226A

23V

ADJ

2A

340KHZ

93%

SOP8

2%

Y

Y

Y

CXSD62227A

23V

ADJ

2.2A

340KHZ

93%

SOP8-PP

2%

Y

Y

Y

CXSD62228A

23V

ADJ

3.2A

340KHZ

93%

SOP8-PP

2%

Y

Y

Y

CXSD62228B

23V

ADJ(PSM)

3.2A

340KHZ

93%

SOP8-PP

2%

Y

Y

Y

CXSD62229

32V

ADJ

2A

340KHZ

93%

SOP8-PP

2%

Y

Y

Y

CXSD62229A

32V

ADJ

2A

600KHZ

93%

SOP8-PP

2%

Y

Y

Y

CXSD62230

32V

ADJ

1.6A

340KHZ

93%

SOP8

2%

Y

Y

Y

CXSD62231

32V

ADJ

2.2A

340KHZ

93%

SOP8-PP

2%

Y

Y

Y

CXSD62231A

32V

ADJ

2.2A

600KHZ

93%

SOP8-PP

2%

Y

Y

Y

CXSD62231B

22V

ADJ

3A

600KHZ

93%

SOP8-PP

2%

Y

Y

Y

CXSD62232

32V

ADJ

2.2A

200KHZ

93%

SOP8-PP

2%

Y

Y

Y

CXSD62233

32V

ADJ

3A

340KHZ

93%

SOP8-PP

2%

Y

Y

Y

CXSD62234

5.5V

1.2/.15/1.8/ADJ

800mA

1.5MHZ

96%

SOT23-5

2%

Y

Y

Y

CXSD62235

5.5V

1.2/.15/1.8/ADJ

1.2A

1.5MHZ

96%

SOT23-5

2%

Y

Y

Y

CXSD62235B

5.5V

1.2/.15/1.8/ADJ

1.2A

1.5MHZ

96%

SOT23-5

2%

Y

Y

Y

CXSD62236

5.5V

1.2/.15/1.8/ADJ

1.2A

1.5MHZ

96%

SOT23-5

2%

Y

Y

Y

CXSD62237

5.5V

1.2/.15/1.8/ADJ

2A

1.5MHZ

96%

SOT23-5

2%

Y

Y

Y

CXSD62238

5.5V

1.2/.15/1.8/ADJ

1.5A*2

1.5MHZ

96%

SOP8

2%

Y

Y

Y