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PDF 8187 Data sheet ( Hoja de datos )
| Número de pieza | 8187 | |
| Descripción | LOW-DROPOUT/ 3.3 V REGULATOR . HIGH EFFICIENCY | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 8187 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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8187
LOW-DROPOUT, 3.3 V REGULATOR
— HIGH EFFICIENCY
Designed specifically to meet the requirement for extended opera-
tion of battery-powered equipment such as cordless and cellular
telephones, the A8187SLT voltage regulator offers the reduced dropout
voltage and quiescent current essential for maximum battery life.
T3.3 V
CVR
PRODUONLY1 2
3
INUED ENCEDwg.PS-022-1
Applicable also to palmtop computers and personal data assistants, the
device delivers a regulated, continuous 3.3 V output at up to 75 mA
under normal operating conditions, or to 150 mA (transient) under
worst-case conditions.
A PMOS pass element provides a typical dropout voltage of only
85 mV at 60 mA of load current. The low dropout voltage permits
deeper battery discharge before output regulation is lost. Furthermore,
quiescent current does not increase as the dropout voltage is ap-
proached, an ideal feature in standby/resume power systems where
data integrity is crucial. Regulator accuracy and excellent temperature
characteristics are provided by a bandgap reference.
This device is supplied in a small-outline plastic transistor package
(SOT-89/TO-243AA) for surface-mount applications. The A8187SLT is
rated for operation over a temperature range of -20°C to +85°C. A
similar device with an ENABLE input for control over sequential power
up, standby, or power down is the A8186SLU.
ONT EFERABSOLUTE MAXIMUM RATINGS
C RInput Voltage, VI . . . . . . . . . . . . . . 10 V
Output Current, IO . . . . . . . . . 150 mA*
IS ROperating Temperature Range,
D OTA . . . . . . . . . . . . . -20°C to +85°C
FJunction Temperature, TJ . . . +150°C†
Storage Temperature Range,
—TS . . . . . . . . . . . . -40°C to +150°C
FEATURES AND BENEFITS
I High Efficiency Provides Extended Battery Life
I 85 mV Typical Dropout Voltage at IO = 60 mA
I 45 µA Typical Quiescent Current at VI = 6 V
I Up to 150 mA Output Current
I Internal Thermal Protection
I Surface-Mount Package
APPLICATIONS
I Cordless and Cellular Telephones
* Output current rating is limited by input voltage,
duty cycle, and ambient temperature. Under
any set of conditions, do not exceed a junction
temperature of +150°C. See next page.
I Personal Data Assistants
I Personal Communicators
I Palmtop Computers
† 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: A8187SLT .
1 page  
8187
LOW-DROPOUT,
3.3 V REGULATOR
TYPICAL CHARACTERISTICS (cont’d)
LOAD REGULATION
LINE REGULATION
3.36
3.34
3.32
3.36
3.34
3.32
TA = 85°C
50 mA INTERVALS
3.30
3.28
VI = 8 V
3.30
IO = 0 mA
3.28
3.26
3.24
TA = 85°C
2 V INTERVALS
VI = 4 V
3.22
0
25 50 75 100
OUTPUT CURRENT in mA
125 150
Dwg. GP-052-8
3.26
3.24
3.22
2.0
IO = 100 mA
3.0 4.0 5.0 6.0
INPUT VOLTAGE in VOLTS
7.0 8.0
Dwg. GP-053-8
OUTPUT VOLTAGE
3.5
3.0
VI = 6 V
2.5
3.31
IO = 0
2.0 3.30
1.5 3.29
IO = 0 - 100 mA
1.0
TA = 25°C
3.28
0.5
0
0
1.0 2.0 3.0
INPUT VOLTAGE in VOLTS
4.0
Dwg. GP-059-1
-50
0 +50
AMBIENT TEMPERATURE in °C
+100
Dwg. GP-050-2
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 8187.PDF ] | |
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