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IMP37 ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 1 Page - IMP, Inc

๋ถ€ํ’ˆ๋ช… IMP37
์ƒ์„ธ๋‚ด์šฉ  Low Dropout Positiv Voltage Regulators
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์ œ์กฐ์‚ฌ  IMP [IMP, Inc]
ํ™ˆํŽ˜์ด์ง€  http://www.ds-imp.com.cn/index.asp
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IMP37 ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 1 Page - IMP, Inc

   
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1999 IMP, Inc.
408-432-9100/www.impweb.com
1
Key Features
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
x
Low Dropout Voltage
โ€“ 0.8V maximum at 100mA
โ€“ 0.95V maximum at 800mA
โ€“ 20% lower dropout voltage than โ€œ1117โ€
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: 75ยตA Maximum
x
Short Circuit and Thermal Protection
x
Space Saving SOT-223 Surface Mount Package
x
โ€œ1117โ€ Pin Compatible
Block Diagram
โ€“
+
+
โ€“
37_01.eps
GND
1
Ref
IMP37
Thermal
Protection
Error
Amp
Current
Limit
2
Input
3
Out
(Tab)
RCS
+
โ€“
IMP3
IMP377
POWER MANAGEMENT
Lo
Low Dr
w Dropout P
opout Positiv
ositivee
V
Volt
oltag
age R
e Regulat
egulator
orss
โ€“ 800mA
โ€“ 800mA
โ€“ 2.5V
โ€“ 2.5V, 3.0V and 3.3V Output
, 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 โ€œ1117โ€ 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 75
ยตA 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 165ยฐC.
The IMP37 is available in low-profile plastic SOT-223 and TO-263
packages and are pin compatible with fixed โ€œ1117โ€ devices.


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