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LP3855-ADJ

1.5A Fast Response Ultra Low Dropout Linear Regulators

厂商名称：National Semiconductor（TI ）

厂商官网：http://www.ti.com

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LP3855-ADJ 1.5A Fast Response Ultra Low Dropout Linear Regulators
September 2006
LP3855-ADJ
1.5A Fast Response Ultra Low Dropout Linear
Regulators
General Description
The LP3855-ADJ fast ultra low-dropout linear regulators op-
erate from a +2.5V to +7.0V input supply. These ultra low
dropout linear regulators respond very quickly to step
changes in load, which makes them suitable for low voltage
microprocessor applications. The LP3855-ADJ is developed
on a CMOS process which allows low quiescent current
operation independent of output load current. This CMOS
process also allows the LP3855-ADJ to operate under ex-
tremely low dropout conditions.
Dropout Voltage:
Ultra low dropout voltage; typically 24mV
at 150mA load current and 240mV at 1.5A load current.
Ground Pin Current:
Typically 4mA at 1.5A load current.
Shutdown Mode:
Typically 10nA quiescent current when
the shutdown pin is pulled low.
Adjustable Output Voltage:
The output voltage may be
programmed via two external resistors.
Features
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Ultra low dropout voltage
Stable with selected ceramic capacitors
Low ground pin current
Load regulation of 0.06%
10nA quiescent current in shutdown mode
Guaranteed output current of 1.5A DC
Available in TO-263, TO-220 and SOT-223 packages
Overtemperature/overcurrent protection
−40˚C to +125˚C junction temperature range
Applications
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n
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Microprocessor power supplies
GTL, GTL+, BTL, and SSTL bus terminators
Power supplies for DSPs
SCSI terminator
Post regulators
High efficiency linear regulators
Battery chargers
Other battery powered applications
Typical Application Circuit
20074334
**See Application Hints.
© 2006 National Semiconductor Corporation
DS200743
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LP3855-ADJ
Connection Diagrams
20074305
20074306
Top View
TO220-5 Package
Bent, Staggered Leads
Top View
TO263-5 Package
20074396
Top View
SOT223-5 Package
Pin Description for TO220-5 and TO263-5 Packages
Pin #
Name
1
2
3
4
5
SD
V
IN
GND
V
OUT
ADJ
Shutdown
Input Supply
Ground
Output Voltage
Set Output Voltage
LP3855-ADJ
Function
Pin Description for SOT223-5 Package
Pin
#
1
2
3
4
5
LP3852
Name
SD
V
IN
V
OUT
ERROR
GND
Function
Shutdown
Input Supply
Output Voltage
ERROR Flag
Ground
Name
SD
V
IN
V
OUT
SENSE
GND
LP3855
Function
Shutdown
Input Supply
Output Voltage
Remote Sense Pin
Ground
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2
LP3855-ADJ
Ordering Information
20074331
Package Type Designator is "T" for TO220 package, and "S" for TO263 package.
TABLE 1. Package Marking and Ordering Information
Output
Voltage
ADJ
ADJ
ADJ
ADJ
ADJ
Order Number
LP3855EMP-ADJ
LP3855EMPX-ADJ
LP3855ES-ADJ
LP3855ESX-ADJ
LP3855ET-ADJ
Current
Description
1.5A, Adj
1.5A, Adj
1.5A
1.5A
1.5A
Package
Type
SOT223-5
SOT223-5
TO263-5
TO263-5
TO220-5
Package Marking
LJ3B
LJ3B
LP3855ES-ADJ
LP3855ES-ADJ
LP3855ET-ADJ
Supplied As:
1000 Units on
Tape and Reel
2000 Units on
Tape and Reel
Rail
Tape and Reel
Rail
3
www.national.com
LP3855-ADJ
Block Diagram
LP3855-ADJ
20074329
www.national.com
4
LP3855-ADJ
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range
Lead Temperature
(Soldering, 5 sec.)
ESD Rating (Note 3)
Power Dissipation (Note 2)
Input Supply Voltage (Survival)
Shutdown Input Voltage
(Survival)
Output Voltage (Survival), (Note
6), (Note 7)
260˚C
2 kV
Internally Limited
−0.3V to +7.5V
−0.3V to 7.5V
−0.3V to +6.0V
−65˚C to +150˚C
I
OUT
(Survival)
Short Circuit Protected
Operating Ratings
Input Supply Voltage (Operating),
(Note 10)
Shutdown Input Voltage
(Operating)
Maximum Operating Current (DC)
Operating Junction Temp. Range
2.5V to 7.0V
−0.3V to 7.0V
1.5A
−40˚C to +125˚C
Electrical Characteristics
LP3855-ADJ
Limits in standard typeface are for T
J
= 25˚C, and limits in
boldface type
apply over the
full operating temperature range.
Unless otherwise specified: V
IN
= V
O(NOM)
+ 1V, I
L
= 10 mA, C
OUT
= 10µF, V
SD
= 2V.
Symbol
Parameter
Conditions
V
OUT
+1V
≤
V
IN
≤
7V
10 mA
≤
I
L
≤
1.5A
V
OUT
+1V
≤
V
IN
≤
7V
10 mA
≤
I
L
≤
1.5A
V
OUT
+1V
≤
V
IN
≤
7.0V
10 mA
≤
I
L
≤
1.5A
Typ
(Note 4)
1.216
10
0.02
0.06
0.06
0.12
24
240
26
260
3
3
0.01
1.8
3.2
35
45
310
420
35
45
320
435
9
10
9
10
10
50
A
A
mV
LP3855-ADJ
(Note 5)
Min
1.198
1.180
Max
1.234
1.253
100
V
nA
%
%
Units
V
ADJ
I
ADJ
∆V
OL
∆V
O
/
∆I
OUT
Adjust Pin Voltage
Adjust Pin Input Current
Output Voltage Line
Regulation (Note 8)
Output Voltage Load
Regulation
(Note 8)
Dropout Voltage
TO-263 and TO-220
(Note 9)
Dropout Voltage
SOT 223
(Note 9), (Note 11)
V
IN
- V
OUT
I
L
= 150 mA
I
L
= 1.5A
I
L
= 150 mA
I
L
= 1.5A
I
L
= 150 mA
I
GND
Ground Pin Current In
Normal Operation Mode
Ground Pin Current In
Shutdown Mode
Peak Output Current
Short Circuit Current
I
L
= 1.5A
V
SD
≤
0.3V
-40˚C
≤
T
J
≤
85˚C
V
O
≥
V
O(NOM)
- 4%
mA
I
GND
I
O(PK)
I
SC
µA
Short Circuit Protection
5
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参数对比
与LP3855-ADJ相近的元器件有：LP3855EMP-ADJ、LP3855EMPX-ADJ、LP3855ES-ADJ、LP3855ESX-ADJ、LP3855ET-ADJ。描述及对比如下：
型号 LP3855-ADJ LP3855EMP-ADJ LP3855EMPX-ADJ LP3855ES-ADJ LP3855ESX-ADJ LP3855ET-ADJ
描述 1.5A Fast Response Ultra Low Dropout Linear Regulators 1.5A Fast Response Ultra Low Dropout Linear Regulators 1.5A Fast Response Ultra Low Dropout Linear Regulators 1.5A Fast Response Ultra Low Dropout Linear Regulators 1.5A Fast Response Ultra Low Dropout Linear Regulators 1.5A Fast Response Ultra Low Dropout Linear Regulators
是否Rohs认证 - 不符合 不符合 不符合 不符合 不符合
厂商名称 - National Semiconductor（TI ） National Semiconductor（TI ） National Semiconductor（TI ） National Semiconductor（TI ） National Semiconductor（TI ）
包装说明 - SOT-223, 5 PIN SOT-223, 5 PIN TO-263, 5 PIN TO-263, 5 PIN TO-220, 5 PIN
Reach Compliance Code - _compli not_compliant _compli not_compliant not_compliant
ECCN代码 - EAR99 EAR99 EAR99 EAR99 EAR99
可调性 - ADJUSTABLE ADJUSTABLE ADJUSTABLE ADJUSTABLE ADJUSTABLE
最大回动电压 1 - 0.435 V 0.435 V 0.42 V 0.42 V 0.42 V
标称回动电压 1 - 0.26 V 0.26 V 0.24 V 0.24 V 0.24 V
JESD-30 代码 - R-PDSO-G5 R-PDSO-G5 R-PSSO-G5 R-PSSO-G5 R-PZFM-T5
JESD-609代码 - e0 e0 e0 e0 e0
长度 - 6.5 mm 6.5 mm 10.16 mm 10.16 mm -
湿度敏感等级 - 1 1 3 3 1
功能数量 - 1 1 1 1 1
输出次数 - 1 1 1 1 1
端子数量 - 5 5 5 5 5
工作温度TJ-Max - 125 °C 125 °C 125 °C 125 °C 125 °C
最大输出电流 1 - 1.5 A 1.5 A 1.5 A 1.5 A 1.5 A
最大输出电压 1 - 7 V 7 V 7 V 7 V 7 V
最小输出电压 1 - 1.2 V 1.2 V 1.2 V 1.2 V 1.2 V
封装主体材料 - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
封装代码 - SOP SOP TO-263 TO-263 ZIP
封装等效代码 - SOT-223-4 SOT-223-4 SMSIP5H,.6,67TB SMSIP5H,.6,67TB ZIP5,.15,.17,67TB
封装形状 - RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
封装形式 - SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE FLANGE MOUNT
包装方法 - TAPE AND REEL TAPE AND REEL RAIL TAPE AND REEL RAIL
峰值回流温度（摄氏度） - 260 260 235 235 NOT APPLICABLE
认证状态 - Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
调节器类型 - ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR
座面最大高度 - 1.8 mm 1.8 mm 4.65 mm 4.65 mm -
表面贴装 - YES YES YES YES NO
技术 - CMOS CMOS CMOS CMOS CMOS
端子面层 - Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn85Pb15)
端子形式 - GULL WING GULL WING GULL WING GULL WING THROUGH-HOLE
端子节距 - 1.5 mm 1.5 mm 1.7 mm 1.7 mm 1.7 mm
端子位置 - DUAL DUAL SINGLE SINGLE ZIG-ZAG
处于峰值回流温度下的最长时间 - 40 40 30 30 NOT APPLICABLE
宽度 - 3.56 mm 3.56 mm 8.635 mm 8.635 mm -
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