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器件参数

参数名称

属性值

是否Rohs认证

符合

厂商名称

ST(意法半导体)

零件包装代码

SOIC

包装说明

LEAD FREE, SOP-8

针数

Reach Compliance Code

compliant

ECCN代码

EAR99

可调性

FIXED

最大回动电压 1

0.5 V

标称回动电压 1

0.2 V

最大绝对输入电压

20 V

最大输入电压

18 V

最小输入电压

5.7 V

JESD-30 代码

R-PDSO-G8

JESD-609代码

长度

4.9 mm

最大电网调整率

0.03%

最大负载调整率

0.025%

湿度敏感等级

功能数量

输出次数

端子数量

工作温度TJ-Max

125 °C

工作温度TJ-Min

-40 °C

最大输出电流 1

0.1 A

最大输出电压 1

5.2 V

最小输出电压 1

4.8 V

标称输出电压 1

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

峰值回流温度（摄氏度）

260

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

表面贴装

YES

技术

BIPOLAR

端子面层

Nickel/Palladium/Gold (Ni/Pd/Au)

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

最大电压容差

宽度

3.9 mm

文档预览

LEXX

Very low-dropout voltage regulator with inhibit function

Datasheet

production data

Description

The LEXX is a very low-dropout voltage regulator

available in SO-8, TO-92 packages and over a

wide range of output voltages.

SO-8

TO-92

Bag

TO-92

Tape and reel

Ammopack

The very low-dropout voltage (0.2 V) and low

quiescent current make it particularly suitable for

low-noise, low-power applications and in battery-

powered systems.

This device is pin-to-pin compatible with the L78L

series. Furthermore, in the 8-pin configuration

(SO-8), it uses a shutdown logic control (pin 5,

TTL compatible). This means that when the

device is used as a local regulator, a part of the

board can be put in standby, decreasing the total

power consumption. In the three-terminal

configuration (TO-92), the device is always in on-

state. It requires a 2.2 µF capacitor for stability,

reducing the component size and cost.

Features

•

Very low-dropout voltage (0.2 V typ.)

•

Very low quiescent current (typ. 50 µA in OFF

mode, 0.5 mA in ON mode, no load)

•

Output current up to 100 mA

•

Output voltages: 3 V, 3.3 V, 4.5 V, 5 V, 8 V

•

Internal current and thermal limit

•

Small 2.2 µF capacitor for stability

•

Available in ± 1% (A) or ± 2% (C) selection at

25 °C

•

Supply voltage rejection: 80 dB (typ.)

•

Temperature range: - 40 to 125 °C

Table 1. Device summary

Order codes

SO-8

TO-92

(bag)

TO-92

(ammopack)

TO-92

(tape and reel)

LE30ABZ-TR

LE30CD-TR

LE33CD-TR

LE45CD-TR

LE50ABD-TR

LE50CD-TR

LE80CD-TR

LE33ABZ-AP

LE33CZ

LE33CZ-AP

LE33CZ-TR

3.3 V

4.5 V

Output voltages

March 2014

This is information on a product in full production.

DocID2573 Rev 14

1/27

www.st.com

Contents

LEXX

Contents

Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Packaging information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2/27

DocID2573 Rev 14

LEXX

Diagram

Figure 1. Block diagram

DocID2573 Rev 14

3/27

Pin configuration

LEXX

Pin configuration

Figure 2. Pin connections (SO-8 top view, TO-92 bottom view)

PIN 1 = V

OUT

PIN 2 = GND

PIN 3 = V

SO-8

TO-92

4/27

DocID2573 Rev 14

LEXX

Maximum ratings

Table 2. Absolute maximum ratings

Symbol

TOT

STG

Parameter

DC input voltage

Output current

Power dissipation

Storage temperature

range

Operating junction

temperature range

Value

Internally limited

(1)

Internally limited

-65 to 150

-40 to 125

°C

Unit

1. Our SO-8 package, used for voltage regulators, is modified internally to have pins 2, 3, 6 and 7 electrically

fused to the die attach pad. This frame decreases the total thermal resistance of the package and

increases its ability to dissipate power when an appropriate area of copper on the printed circuit board is

available for heatsinking. The external dimensions are the same as SO-8 standard.

Table 3. Thermal data

Symbol

thJC

thJA

Parameter

Thermal resistance junction-case

Thermal resistance junction-ambient

SO-8

200

TO-92

Unit

°C/W

Figure 3. Test circuit

LEXX

Note:

If the INHIBIT pin is left floating, the regulator is in ON mode. However, when the inhibit

function is not used, it should be grounded to avoid any noise.

DocID2573 Rev 14

5/27

参数对比

与LE50CD相近的元器件有：LE45ABD、LE50CZ-TR、LE25CD、LE40CD、LE40ABD。描述及对比如下：

型号	LE50CD	LE45ABD	LE50CZ-TR	LE25CD	LE40CD	LE40ABD
描述	LDO Voltage Regulators 5.0V 100mA Positive	LDO Voltage Regulators 4.5V 100mA Positive	LDO Voltage Regulators 5.0V 100mA Positive		LDO Voltage Regulators 4.0V 100mA Positive	LDO Voltage Regulators 4.0V 100mA Positive
是否Rohs认证	符合	符合	符合	符合	符合	符合
厂商名称	ST(意法半导体)	ST(意法半导体)	ST(意法半导体)	ST(意法半导体)	ST(意法半导体)	ST(意法半导体)
零件包装代码	SOIC	SOIC	TO-92	SOIC	SOIC	SOIC
包装说明	LEAD FREE, SOP-8	SOP, SOP8,.25	TO-92, SIP3,.1,50	SO-8	SOP, SOP8,.25	SOP, SOP8,.25
针数	8	8	3	8	8	8
Reach Compliance Code	compliant	compliant	not_compliant	compliant	compliant	compliant
ECCN代码	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
可调性	FIXED	FIXED	FIXED	FIXED	FIXED	FIXED
最大回动电压 1	0.5 V	0.5 V	0.5 V	0.5 V	0.5 V	0.5 V
标称回动电压 1	0.2 V	0.2 V	0.2 V	0.2 V	0.2 V	0.2 V
最大绝对输入电压	20 V	20 V	20 V	20 V	20 V	20 V
最大输入电压	18 V	18 V	18 V	18 V	18 V	18 V
最小输入电压	5.7 V	5.2 V	5.7 V	3.2 V	4.7 V	4.7 V
JESD-30 代码	R-PDSO-G8	R-PDSO-G8	O-XBCY-T3	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8
JESD-609代码	e4	e4	e3	e4	e4	e4
最大电网调整率	0.03%	0.02%	0.03%	0.02%	0.03%	0.02%
最大负载调整率	0.025%	0.015%	0.025%	0.025%	0.025%	0.015%
功能数量	1	1	1	1	1	1
输出次数	1	1	1	1	1	1
端子数量	8	8	3	8	8	8
工作温度TJ-Max	125 °C	125 °C	125 °C	125 °C	125 °C	125 °C
工作温度TJ-Min	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
最大输出电流 1	0.1 A	0.1 A	0.1 A	0.1 A	0.1 A	0.1 A
最大输出电压 1	5.2 V	4.59 V	5.2 V	2.6 V	4.16 V	4.08 V
最小输出电压 1	4.8 V	4.41 V	4.8 V	2.4 V	3.84 V	3.92 V
标称输出电压 1	5 V	4.5 V	5 V	2.5 V	4 V	4 V
封装主体材料	PLASTIC/EPOXY	PLASTIC/EPOXY	UNSPECIFIED	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	SOP	SOP	TO-92	SOP	SOP	SOP
封装等效代码	SOP8,.25	SOP8,.25	SIP3,.1,50	SOP8,.25	SOP8,.25	SOP8,.25
封装形状	RECTANGULAR	RECTANGULAR	ROUND	RECTANGULAR	RECTANGULAR	RECTANGULAR
封装形式	SMALL OUTLINE	SMALL OUTLINE	CYLINDRICAL	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE
峰值回流温度（摄氏度）	260	260	NOT SPECIFIED	260	260	NOT SPECIFIED
认证状态	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
调节器类型	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
表面贴装	YES	YES	NO	YES	YES	YES
技术	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR
端子面层	Nickel/Palladium/Gold (Ni/Pd/Au)	Nickel/Palladium/Gold (Ni/Pd/Au)	Tin (Sn)	Nickel/Palladium/Gold (Ni/Pd/Au)	Nickel/Palladium/Gold (Ni/Pd/Au)	Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式	GULL WING	GULL WING	THROUGH-HOLE	GULL WING	GULL WING	GULL WING
端子节距	1.27 mm	1.27 mm	1.27 mm	1.27 mm	1.27 mm	1.27 mm
端子位置	DUAL	DUAL	BOTTOM	DUAL	DUAL	DUAL
处于峰值回流温度下的最长时间	30	30	NOT SPECIFIED	30	30	NOT SPECIFIED
最大电压容差	4%	2%	4%	4%	4%	2%
长度	4.9 mm	4.9 mm	-	4.9 mm	4.9 mm	4.9 mm
湿度敏感等级	1	1	-	1	1	-
座面最大高度	1.75 mm	1.75 mm	-	1.75 mm	1.75 mm	1.75 mm
宽度	3.9 mm	3.9 mm	-	3.9 mm	3.9 mm	3.9 mm