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PDF IMP37 Data sheet ( Hoja de datos )
| Número de pieza | IMP37 | |
| Descripción | Low Dropout Positiv Voltage Regulators | |
| Fabricantes | IMP Inc | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de IMP37 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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IMP37
POWER MANAGEMENT
Low Dropout Positive
Voltage Regulators
– 800mA
– 2.5V, 3.0V and 3.3V Output
The IMP37 series of Low Dropout (LDO) three-terminal voltage regula-
tors feature guaranteed low dropout voltages at currents up to 0.8A. The
IMP37 regulator family dropout voltage is guaranteed to be 0.95V or
lower at 0.8A. At 100mA, the maximum dropout voltage is 0.8V.
Compared with “1117” type LDOs, the IMP37 has a 20% lower dropout
voltage.
Three fixed output voltages are offered: 2.5V, 3.0V and 3.3V. Output volt-
ages are factory trimmed to within 1% of the nominal value.
In addition to low dropout voltages, the IMP37 family features greatly
reduced quiescent operating current. The 75µA maximum specification
represents an over 100 times improvement over competitive devices.
Devices are short circuit protected, and a thermal protection circuit shuts
the regulator off should the junction temperature exceed 165°C.
The IMP37 is available in low-profile plastic SOT-223 and TO-263
packages and are pin compatible with fixed “1117” devices.
Key Features
x Low Dropout Voltage
– 0.8V maximum at 100mA
– 0.95V maximum at 800mA
– 20% lower dropout voltage than “1117”
LDO regulators
x Guaranteed Low Dropout Voltage at Multiple
Current Levels
x 1% Trimmed 2.5V, 3.0V and 3.3V Outputs
x Reduced Quiescent Current: 75µA Maximum
x Short Circuit and Thermal Protection
x Space Saving SOT-223 Surface Mount Package
x “1117” Pin Compatible
Applications
x High-efficiency linear power supplies
x Post regulator for switching supplies
x 5V to 3.3V linear regulators
x USB hubs
x Battery chargers
x Routers, ISDN/DSL modems
Block Diagram
3
Input
RCS
+
Current
Limit
–
Thermal
Protection
Error
Amp
IMP37
2
Out
(Tab)
–
+
+
Ref
–
1
GND
37_01.eps
© 1999 IMP, Inc.
408-432-9100/www.impweb.com
1
1 page  
IMP37
Package Dimensions
Plastic SOT-223 (4-Pin)
B
EH
Se
A
A1
D
B1
e1
Q1
Q
Q2 C
SOT-223 (4-Pin).eps
TO-263 (3-Pin)
E
L2
A
C2
D
L
B2
e
B
L1
C
0° - 8°
TO-263 (3-Pin).eps
Inches
Millimeters
Min Max Min Max
Plastic SOT-223 (4-Pin)*
A 0.067
0.060
1.70
1.50
A1 0.004
0.0008
0.10
0.02
B 0.124
0.116
3.15
2.95
B1 0.033
0.026
0.85
0.65
C 0.014
0.010
0.35
0.25
D 0.264
0.248
6.70
6.30
e 0.0905 NOM
2.30 NOM
e1 0.181 NOM
4.50 NOM
E 0.146
0.130
3.70
3.30
h 0.287
0.264
7.30
6.70
S 0.041
0.033
1.05
0.85
t 0.051
0.043
1.30
1.10
Q 10° MAX
10° MAX
Q1 16° 10° 16° 10°
Q2 16° 10° 16° 10°
TO-263 (3-Pin)**
A 0.160
0.190
B 0.020
0.039
B2 0.045
0.055
C 0.018
0.029
C2 0.045
0.055
D 0.340
0.380
E 0.380
0.405
e 0.100 BSC
L 0.575
0.625
L1 0.090
0.110
L2 ———
0.055
* JEDEC Drawing TO-261AA
** JEDEC Drawing TO-263AA
♦ Add /T to Part Number for Tape and Reel.
37_Table04.eps
© 1999 IMP, Inc.
408-432-9100/www.impweb.com
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet IMP37.PDF ] | |
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