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參數(shù)資料
| 型號： | 8181 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | LOW-DROPOUT, 5 V REGULATOR . HIGH EFFICIENCY |
| 中文描述： | 低壓差，5 V穩(wěn)壓器。高效 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 103K |
| 代理商： | 8181 |
8181
LOW-DROPOUT,
5 V REGULATOR
DSCONTNUEDPRODUCT
—FORREFERENCEONLY
set of conditions, do not exceed a junction
temperature of +150
°
C. See next page.
8181
LOW-DROPOUT, 5 V REGULATOR
— HIGH EFFICIENCY
ment such as cellular telephones, the A8181SLB low dropout voltage
regulator provides high efficiency for maximum battery life in a mini-
mum package size. Equally applicable to camcorders and portable
computers, the device provides a fixed 5 V regulated continuous output
at almost 200 mA of load current under worst-case conditions. Under
normal operating conditions, output currents over 500 mA are
permitted.
A MOSFET pass element delivers high output current with an
input-output differential of less than 300 mV. For high efficiency, the
low dropout voltage allows a longer battery discharge before output
voltage regulation is lost. A low quiescent current, even during high
load conditions, makes the device ideal for standby power systems.
High regulator accuracy and excellent temperature characteristics are
provided by a bandgap reference. An enable input gives the designer
complete control over sequential power-up or emergency shutdown.
This device is supplied in a 16-lead wide-body, small-outline
plastic power package (SOIC) for surface-mount applications. The
copper batwing provides for maximum package power dissipation in
the smallest possible construction. The A8181SLB is rated for opera-
tion over a temperature range of -20
°
C to +85
°
C.
FEATURES AND BENEFITS
I
High Efficiency Provides Extended Battery Life
I
Less Than 300 mV Dropout Voltage
I
Low Quiescent Current
I
>200 mA Output Current
I
LSTTL-Compatible ON/OFF Control
For Sequential Power-up or Emergency Shutdown
I
Internal Thermal Protection
I
SOIC Surface-Mount Package
Always order by complete part number:
A8181SLB
.
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25
°
C
Input Voltage, V
I
...................................
10 V
Output Current, I
O
(40% duty cycle) ............................
1 A*
(75% duty cycle) .....................
500 mA*
(continuous)............................
370 mA*
Operating Temperature Range,
T
A
.................................
-20
°
C to +85
°
C
Junction Temperature, T
J
..............
+150
°
C
Storage Temperature Range,
T
S
...............................
-40
°
C to +150
°
C
* Output current rating is limited by input voltage,
duty cycle, and ambient temperature. Under any
Fault conditions that produce excessive
junction temperature will activate device thermal
shutdown circuitry. These conditions can be
tolerated but should be avoided.
D
2
1
2
3
4
5
12
13
14
15
16
GROUND
Dwg. PS-018
6
7
10
11
8
9
GROUND
GROUND
GROUND
NC
NC
NC
OUT
IN
IN
ENABLE
NC
NC
NC
NC
OUT
VR
5
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