CDT1117 [ETC]

CDT1117系列 LDO电压转换功能IC 输入电压最高为：7.0 V 输出电压可选： 1.8V 2.5V 3.5V 输出电流：150mA 静态电流：0.13mA 输入输出电压差：230mV/75mA 工作温度：0~70℃ 纹波抑制率：62dB/120Hz 封装形式：SOT25-5L; CDT1117系列>>LDO电压转换功能IC>输入电压最高为： 7.0 V>输出电压可选： 1.8V 2.5V 3.5V>输出电流： 150毫安>静态电流： 0.13毫安>输入输出电压差： 230mV / 75毫安>工作温度： 0 〜 70 ℃>纹波抑制率： 62分贝/ 120Hz的>封装形式： SOT25-5L


型号：	CDT1117
厂家：	ETC
描述：	CDT1117系列 LDO电压转换功能IC 输入电压最高为：7.0 V 输出电压可选： 1.8V 2.5V 3.5V 输出电流：150mA 静态电流：0.13mA 输入输出电压差：230mV/75mA 工作温度：0~70℃ 纹波抑制率：62dB/120Hz 封装形式：SOT25-5L CDT1117系列>>LDO电压转换功能IC>输入电压最高为： 7.0 V>输出电压可选： 1.8V 2.5V 3.5V>输出电流： 150毫安>静态电流： 0.13毫安>输入输出电压差： 230mV / 75毫安>工作温度： 0 〜 70 ℃>纹波抑制率： 62分贝/ 120Hz的>封装形式： SOT25-5L CD
文件：	总6页 (文件大小：223K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

KWAIDA

CDT1117

1A LDO Linear Voltage Regulators

ò General Description

ò Features

The CDT1117 series are low-drop-out

( LDO ) Linear regulators. The devices have

been optimized for applications where fast

transient response and minimum input

voltages are critical. The internal over-

current protection and thermal easy

protection, makes the device extremely

to use in a wide range of applications.

ó Low dropout performance

ó Output current of 1A typical

ó Wide range input supply voltage

ó Thermal shutdown protection

ó Fixed 1.8V, 2.5V, 3.3V output voltages

Available

ó SOT-223, packages available.

ò Applications

ó Active SCSI terminators

ó High efficiency linear regulators

ó Motherboard clock supplies

ò Ordering Information

T_A(ʚ)

Part Number

Mark

Output Voltage (V)

Package

CDT1117A

MT1117A

ADJUSTABLE

0 ~ 70ʚ

SOT-223

CDT1117-XXA

MT1117-XXA

XX=1.8/2.5/3.3

0 ~ 70ʚ

SOT-223

VER. 1.1

ǺǺ

July 25, 2007

TEL:0755-82914455 0755-82911749

FAX:0755-82913164

WWW.KWAIDA.COM

KWAIDA

CDT1117

ò Pin Assignment

SOT-223

VSS VOUT VIN

ò Pin Description

NO. PIN NAME

I/O

FUNCTION

VSS

Negative power supply

Power output

VOUT

VIN

Positive power supply

ò Block Diagram

VOUT

VIN

VREF

OCP

OTP

VSS

VER. 1.1

July 25, 2007

TEL:0755-82914455 0755-82911749

FAX:0755-82913164

WWW.KWAIDA.COM

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KWAIDA

CDT1117

ò Absolute Maximum Ratings

ó Supply Voltage ------------------

ó Operating Temperature ---------

ɡ0.3V to 7.0V

0ʚ to 125ʚ

ó Storage Temperature------------- ɡ40ʚ to 150ʚ

* NoteǺStresses above those listed may cause permanent damage to the devices.

ò Electrical Characteristics

(Operating Conditions: 3VЉ V_INЉ 6V, T_J= 25^OC unless otherwise specified.)

Symbol

V_IN

Parameter

Condition

Min. Typ. Max. Units

Input Voltage

CDT 1117-1.8, 3V ≤ VIN ≤ 5.5V

CDT 1117-2.5, 3.5V ≤ VIN ≤ 5.5V

CDT 1117-3.3, 4.3V ≤ VIN ≤ 5.5V

1.764

2.450

3.234

1.80

2.50

1.836

2.550

3.366

1.0

10mA≤ IOUT

≤ 1A

Output Voltage (1)

V_O

3.30

Line Regulation (1)

(VOUT+1V) ≤ VIN ≤ 5.5V, IOUT=10mA

0.005

V_SR

V_LR

V_D

I_CL

I_Q

Load Regulation (1) 10mA≤ IOUT≤ 1A

0.5

0.65

1.5

Dropout Voltage (2)

Current Limit

VIN≥2V, IOUT=1A

(VIN-VOUT)=2V

VIN=VOUT+1.25

Quiescent Current

Minimum Load

Current

Ripple Rejection

Ratio

1.5V≤ (VIN-VOUT) ≤ 5.75V

0.1

I_O

f = 120Hz

R_A

Notes:

(1) Low duty cycle pulse testing with which TJ remain unchanged.

(2) ∆ V_OUT, ∆V_REF= 1%

ò Power Dissipation Table

θ_JA

Df( mW/^OC)

T_A≤ 25^OC

T_A=70^OC

T_A= 85^OC

Package

(^OC /W )

T_A≥ 25^OC

Power rating(mW) Power rating(mW) Power rating (mW)

SOT-223

Notes :

156

7.35

919 588 478

1.θ_JAΚThermal Resistance-Junction to Ambient, D_F: Derating factor, Po: Power consumption.

Junction Temperature CalculationΚT_J= T_A+ (P_D× θ_JA), Po = D_F× (T_J- T_A)

The θ_JAnumbers are guidelines for the thermal performance of the device/PC-board system.

All of the above assume no ambient airflow.

2.θ_JTΚThermal Resistance-Junction to Ambient, T_C: case(Tab) temperature, T_J= T_C+ (P_D× θ_JT)

For A package, θ_JT= 15.0^OC /W.

For B package, θ_JT= 7.0^OC /W.

VER. 1.1

July 25, 2007

TEL:0755-82914455 0755-82911749

FAX:0755-82913164

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CDT1117

ò Typical Performance Characteristics

(V_IN= 5VΔC_IN=10ꢀFΔC_OUT= 22ꢀFΔT_A=25^OC unless otherwise specified.)

DROPOUT VOLTAGE vs. OUTPUT CURRENT

1.3

1.2

1.1

0.9

0.8

0.7

0.6

0.5

100

300

500

800

Output Current (mA)

ò Application Note

Maximum Power Dissipation Calculation:

P_D(max)= [(V_IN(max)- V_O(nom))] × I_O(nom)+ V_IN(max)× I_Q

Where: V_O(nom): The nominal output voltage

I_O(nom): The nominal output current, and

I_Q: The quiescent current the regulator consumes at I_O(MAX)

_IN(max): The maximum input voltage

Then θ_JA= (150^OC – T_A) / P_D

VER. 1.1

July 25, 2007

TEL:0755-82914455 0755-82911749

FAX:0755-82913164

WWW.KWAIDA.COM

ǺǺ

KWAIDA

CDT1117

ò Application Circuit

VIN

VO U T

VIN

VO U T

CD T 1117

VS S

CIN

CO U T

1u F

4.7u F

Fixed Voltage Regulator

VIN

VO U T

CD T 1117

120

ꢁ

VS S

CIN

CO U T

1u F

4.7u F

Adjustable Regulator

VOUT =1.25V (1+R2/R1)

VER. 1.1

July 25, 2007

TEL:0755-82914455 0755-82911749

FAX:0755-82913164

WWW.KWAIDA.COM

ǺǺ

KWAIDA

CDT1117

òPackage Information

ó SOT-223 outline dimensions

GAUGE PLANE

SEATING PLANE

NOTES.

Symbols

MIN.

NOM.

MAX.

JEDEC OUTLINEΚTO-261 AA

1.80

0.10

1.70

0.84

0.35

6.70

7.30

3.70

0.02

0.15

0.66

0.23

6.30

6.70

3.30

1.60

0.70

0.30

6.50

7.00

3.50

2.30 BASIC

4.60 BASIC

0.75

Ә⁰

VARIATION (ALL DIMENSIONS SHOWN IN MM)

ϠʳCDT assumes no responsibility for the use of the specification described. CDT reserves the right to modify the product specification without notice.

( а΢ೕ਱໻

ୖԵǴҁϦљள೵Չঅ҅Ǵόќ೯

)

VER. 1.1

July 25, 2007

TEL:0755-82914455 0755-82911749

FAX:0755-82913164

WWW.KWAIDA.COM

ǺǺ

CDT1117 [ETC]

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