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PDF A8181SLB Data sheet ( Hoja de datos )
| Número de pieza | A8181SLB | |
| Descripción | LOW-DROPOUT/ 5 V REGULATOR . HIGH EFFICIENCY | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de A8181SLB (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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8181
LOW-DROPOUT,
5 V REGULATOR
8181
LOW-DROPOUT, 5 V REGULATOR
— HIGH EFFICIENCY
Especially suited for hand-held, portable, battery-operated equip-
TNC 1
16 OUT
CNC 2
NC 3
U YGROUND 4
15 OUT
14 NC
13 GROUND
D LGROUND 5
12 GROUND
O NENABLE 6 VR 11 NC
R OIN 7
10 NC
PIN 8
9 NC
D CEDwg.PS-018
TINUEERENABSOLUTE MAXIMUM RATINGS
Fat TA = +25°C
NInput Voltage, VI ................................... 10 V
EOutput Current, IO
O(40% duty cycle) ............................ 1 A*
R(75% duty cycle) ..................... 500 mA*
C(continuous) ............................ 370 mA*
S ROperating Temperature Range,
TA ................................. -20°C to +85°C
I OJunction Temperature, TJ .............. +150°C†
Storage Temperature Range,
D FTS ............................... -40°C to +150°C
* Output current rating is limited by input voltage,
—duty cycle, and ambient temperature. Under any
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
s High Efficiency Provides Extended Battery Life
s Less Than 300 mV Dropout Voltage
s Low Quiescent Current
s >200 mA Output Current
s LSTTL-Compatible ON/OFF Control
For Sequential Power-up or Emergency Shutdown
s Internal Thermal Protection
s SOIC Surface-Mount Package
set of conditions, do not exceed a junction
temperature of +150°C. See next page.
† Fault conditions that produce excessive
junction temperature will activate device thermal
shutdown circuitry. These conditions can be
tolerated but should be avoided.
Always order by complete part number: A8181SLB .
1 page  
8181
LOW-DROPOUT,
5 V REGULATOR
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
0
0.5
0.4
0.3
0.2
0.1
0
0
TYPICAL CHARACTERISTICS (cont’d)
LOAD REGULATION
TA= 85°C
VI = 10 V
VI = 8 V
VI = 7 V
VI = 6 V
V = 5.5 V
I
100 200 300
OUTPUT CURRENT, IO in mA
400 500
Dwg. GP-039-2
LINE REGULATION
5.06
5.04
5.02
TA= 85°C
100 mA INTERVALS
5.00
IO = 0 mA
4.98
4.96
4.94
IO = 500 mA
4.92
5.0
6.0 7.0 8.0
INPUT VOLTAGE, VI in VOLTS
9.0 10
Dwg. GP-040-2
DROPOUT VOLTAGE
OUTPUT VOLTAGE vs TEMP.
TA = 85°C
TA = 25°C
TA = -20°C
5.01
5.00
4.99
4.98
VI = 6 V
IO = 0 mA
100 200 300
OUTPUT CURRENT, IO in mA
400
500
Dwg. GP-041
-50 0 +50
AMBIENT TEMPERATURE, TA in °C
+100
Dwg. GP-036
CAUTION: Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output
currents. See Maximum Allowable Output Current table.
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet A8181SLB.PDF ] | |
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