SC1117DG各脚功能电路原理芯片引脚定义引脚图及功能IC贸易商-中国IC网-芯三七

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产品型号SC1117DG的概述

SC1117DG芯片概述及应用分析一、SC1117DG芯片的概述 SC1117DG是一种低压差线性稳压器(Linear Voltage Regulator)，广泛应用于电源管理和信号调理系统中。该芯片能够提供稳定的输出电压，并具有良好的负载和线路调节特性。SC1117DG的设计使其在各种条件下均能维持高效率，这使其成为现代电子设计中不可或缺的元器件之一。 SC1117DG的输入电压范围通常为1.25V到15V，但具体参数可能因厂家而异。芯片具备过流保护、过热保护及短路保护等功能，确保了在工作过程中设备的安全性。根据型号的不同，该芯片可以输出多种电压，常见的包括1.25V、1.5V、1.8V、2.5V、3.3V、5V等，并且其输出电流最大可达1A。此外，SC1117DG的特性还包括宽输入/输出电压差、较低的静态电流和高的PSRR（电源抑制比）。二、SC1117DG的详细参数 1....

产品型号SC1118S-2.5TR的Datasheet PDF文件预览

SC1118

1A (Sink & Source) Low Dropout, Low

Quiescent Current Voltage Regulator

POWER MANAGEMENT

Description

Features

The SC1118 family of low dropout regulators has the

unique capability of maintaining output regulation while

sourcing or sinking current. The 2.85V output voltage

option is ideal for use as a Boulay termination of up to

27 SCSI data lines. The regulator maintains regulation

while both sourcing and sinking current, enabling the use

of active negation drivers for improved noise immunity

on the data lines. Regulation of output voltage is

maintained for TERMPWR voltages as low as 4.0V. When

unloaded, quiescent supply current is a low 2mA,

allowing continuous connection to the TERMPWR lines.

Regulates while sourcing or sinking current

Provides termination for up to 27 SCSI lines

2mA quiescent current

Ultra low power shutdown mode

Current limit and thermal shutdown protection

Stable for any C_LOAD≥ 0.22µF

Fast settling time

SOT-223 and SO-8 surface mount packages

Applications

Active negation SCSI terminations

Computers

Disk drives

An ultra low power shutdown mode is also available on

the SO-8 version. In shutdown the output is high

impedance and supply current drops to 100µA (typ.).

CD-ROM drives

Supply splitter

Current limits in both sourcing and sinking modes, plus

on-chip thermal shutdown make the circuit tolerant of

output fault conditions.

The SC1118 is available in the 3-lead SOT-223 and

8-lead SO-8 packages.

Typical Application Circuits

U1 SC1118S-x.x

U1 SC1118ST-x.x

1, 4

VIN

VOUT

VIN

VOUT

OUT

1uF

GND

3, 6, 7

2, TAB

SC1118S

OUT

1, 4

VIN

VOUT

1uF

V_OUT= V_FB• 1+

+ I_FB• R1

GND

3, 6, 7

Revision: June 10, 2004

www.semtech.com

SC1118

POWER MANAGEMENT

Absolute Maximum Ratings

Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified

in the Electrical Characteristics section is not implied.

Parameter

Symbol

V_IN

Maximum

Units

Supply Voltage

Power Dissipation

P_D

Internally Limited

Thermal Resistance Junction to Case

SOT-223

SO-8

°C/W

θ_JC

Thermal Resistance Junction to Ambient

SOT-223

SO-8

θ_JA

163

Operating Temperature Range

Junction Temperature Range

T_A

T_J

0 to +85

-40 to +150

-65 to +150

300

°C

Storage Temperature Range

T_STG

T_LEAD

V_ESD

Lead Temperature (Soldering) 10 Sec.

ESD Rating (Human Body Model)

Electrical Characteristics

Unless otherwise specified: T_A= 25°C, V_IN= V_EN= 5V (2.5V, 2.85V and adjustable options, adjustable option set to 2V out), V_IN= V_EN= 7V (5V option),

I_OUT= 0mA, C_IN= C_OUT= 1µF. Values in bold apply over operating temperature range: 0 ≤ T_J= T_A≤ 85°C.

Parameter

Symbol

Conditions

Min

Typ

Max Units

(2)

Supply Voltage Range

Quiescent Current

V_IN

I_Q

V_IN(min)

µA

V_EN= 5V

V_EN= 0V

100

V_OUT

250

+1%

+2%

1.01

1.02

Output Voltage⁽¹⁾

V_OUT

-1%

-2%

0.99

0.98

-1A ≤ I_OUT≤ 1A, V_IN= V_IN(MIN)⁽²⁾to 15V

Fixed output options

Feedback Voltage⁽¹⁾⁽⁵⁾

V_FB

1.00

-1A ≤ I_OUT≤ 1A, V_IN= 3.7V to 15V

V_O= V_FB

Adjustable output option

Feedback Bias Current

Line Regulation⁽¹⁾⁽⁵⁾

I_FB

µA

REG_(LINE)

ADJ, 2.5V, 2.85V: V_IN= V_IN(MIN)⁽²⁾to 15V

5V: V_IN= 6.5V to 15V

Load Regulation⁽¹⁾⁽⁵⁾

ADJ, 2.5V, 2.85V

REG_(LOAD)

I_OUT= -1A to 0A or 0A to 1A

2004 Semtech Corp.

www.semtech.com

SC1118

POWER MANAGEMENT

Electrical Characteristics

Unless otherwise specified: T_A= 25°C, V_IN= V_EN= 5V (2.5V, 2.85V and adjustable options, adjustable option set to 2V out), V_IN= V_EN= 7V (5V option),

I_OUT= 0mA, C_IN= C_OUT= 1µF. Values in bold apply over operating temperature range: 0 ≤ T_J= T_A≤ 85°C.

Parameter

Symbol

Conditions

Min

Typ

Max Units

Dropout Voltage ⁽¹⁾⁽³⁾

V_D

I_OUT= 100mA

I_OUT= 800mA

0.85

1.0

1.10

1.3

For Adjustable option

V_O= 3.3V, V_EN= V_IN

I_OUT= 1A

1.5

Minimum Output Voltage

Maximum Output Voltage

Output Current Limit⁽⁴⁾

V_OUT(MIN)

V_OUT(MAX)

I_CL(+)

ADJ version

V_FB

ADJ version

5.5

V_OUT= (V_OUT(NOM)- 100mV)

1.5

-1.5

I_CL(-)

t_S

V_OUT= (V_OUT(NOM)+ 100mV)

I_OUT= -1A to 0A or 0A to 1A

-1

Load Transient Settling Time,

µs

∆V_OUT= 1%

Ripple Rejection

R_A

V_IH

V_IL

I_EN

f = 120Hz, (V_IN- V_OUT) = 2V, V_AC= 0.5V_P-P

Output ON

1.5

Enable Input Threshold

1.8

Output OFF

0.4

Enable Input Bias Current

V_EN= V_IN= 7V (EN sinking)

V_EN= 0V, V_IN= 7V (EN sourcing)

µA

-25

155

-60

Thermal Shutdown Junction

Temperature

T_HI

°C

Thermal Shutdown Hysteresis

T_HYST

Notes:

(1) Low duty cycle pulse testing with Kelvin connections required.

(2) V_IN(MIN)for each voltage option is as follows:

Voltage Option V_IN(MIN)

ADJ

2.5V

2.85V

3.7V

4.2V

4.5V

6.5V

(3) Defined as the input to output differential at which the output voltage drops 1% below the value measured at

a differential of 2V.

(4) As V increases further towards GND or V_IN,the current limit will fold back.

(5) Adju^Os^Ut^Table option: for 3.7V ≤ V_IN≤ 5V, V_EN= V_IN,

for 5V ≤ V_IN≤ 15V, V_EN= 5V

2004 Semtech Corp.

www.semtech.com

SC1118

POWER MANAGEMENT

Pin Configurations

Ordering Information

Device⁽¹⁾

Package

Top Views

SC1118S-X.XTR⁽²⁾

SO-8

SC1118STR⁽³⁾

SC1118ST-X.XTR⁽²⁾

SOT-223

Notes:

(1) Only available in tape and reel packaging. A reel

contains 2500 devices (both packages).

(2) Where X.X denotes voltage options. Available

voltages are: 2.5V (-2.5), 2.85V (-2.85) and 5V (-5.0).

Contact factory for additional voltage options.

(3) Adjustable output voltage version (SO-8 only).

SOT-223

Fixed Output Voltage

SOT-223

Pin Function

OUT

GND

Block Diagram

Adjustable Output Voltage

SO-8

TAB is GND

* R1 and R2 are only in fixed voltage parts. FB pin is

only present in adjustable part.

Pin Descriptions

Pin Number

Fixed SO-8 Adj. SO-8 SOT-223

Pin Function

Name

Active high enable input. CMOS/TTL compatible. Pulling this pin low shuts

the device down. Connected internally to IN in the SOT-223 package.

Feedback input. Connects to the inverting input of the error amplifier. Use

this pin to adjust the output voltage of the adjustable SO-8 parts (see

Application Circuit on page 1).

GND

3, 6, 7

1, 4

3, 6, 7

1, 4

2/TAB Ground pin(s). Connect all ground connections to ground.

Input pin(s). Connect all pins to positive supply and to each other, decouple

with 1µF minimum.

Not connected. Leave this pin floating.

OUT

Output pin. Connect a ≥ 0.22µF capacitor for stability.

2004 Semtech Corp.

www.semtech.com

SC1118

POWER MANAGEMENT

Outline Drawing - SOT-223

Land Pattern - SOT-223

2004 Semtech Corp.

www.semtech.com

SC1118

POWER MANAGEMENT

Outline Drawing - SO-8

Land Pattern - SO-8

Contact Information

Semtech Corporation

Power Management Products Division

200 Flynn Road, Camarillo, CA 93012

Phone: (805)498-2111 FAX (805)498-3804

2004 Semtech Corp.

www.semtech.com

SC1117DG相关文章

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SC1118S-2.5TR产品参数

型号:	SC1118S-2.5TR
是否无铅：	含铅
是否Rohs认证：	不符合
生命周期：	Obsolete
零件包装代码：	SOIC
包装说明：	SOP, SOP8,.25
针数：	8
Reach Compliance Code：	unknown
ECCN代码：	EAR99
HTS代码：	8542.39.00.01
风险等级：	5.92
可调性：	FIXED
最大回动电压 1：	1.3 V
标称回动电压 1：	1 V
最大绝对输入电压：	17 V
最大输入电压：	15 V
最小输入电压：	4.2 V
JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e0
长度：	4.9 mm
最大电网调整率：	0.008%
最大负载调整率：	0.02%
功能数量：	1
输出次数：	1
端子数量：	8
工作温度TJ-Max：	150 °C
工作温度TJ-Min：	-40 °C
最大输出电流 1：	1 A
最大输出电压 1：	2.55 V
最小输出电压 1：	2.45 V
标称输出电压 1：	2.5 V
封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP
封装等效代码：	SOP8,.25
封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE
包装方法：	TAPE AND REEL
峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified
调节器类型：	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
座面最大高度：	1.75 mm
子类别：	Other Regulators
表面贴装：	YES
技术：	BIPOLAR
端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING
端子节距：	1.27 mm
端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED
最大电压容差：	2%
宽度：	3.9 mm
Base Number Matches：	1

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产品型号SC1117DG的概述

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