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LT1965IDD Datasheet(PDF) 1 Page - Linear Integrated Systems

Part # LT1965IDD
Description  1.1A, Low Noise, Low Dropout Linear Regulator
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Manufacturer  LINEAR [Linear Integrated Systems]
Direct Link  http://www.linearsystems.com
Logo LINEAR - Linear Integrated Systems

LT1965IDD Datasheet(HTML) 1 Page - Linear Integrated Systems

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LT1965 Series
1
1965fb
For more information www.linear.com/LT1965
Features
applications
Description
1.1A, Low Noise,
Low Dropout Linear Regulator
The LT®1965 series are low noise, low dropout linear regu-
lators. The devices supply 1.1A of output current with a
310mVtypicaldropoutvoltage.Operatingquiescentcurrent
is 500µA for the adjustable version, reducing to <1µA in
shutdown. Quiescent current is well controlled; it does not
rise in dropout as with many other regulators. The LT1965
regulators have very low output noise which makes them
ideal for sensitive RF and DSP supply applications.
Output voltage ranges from 1.20V to 19.5V. The LT1965
regulators are stable with output capacitors as low as
10µF.Internalprotectioncircuitryincludesreverse-battery
protection, current limiting with foldback, thermal limit-
ing and reverse-current protection. The LT1965 series
are available in fixed output voltages of 1.5V, 1.8V, 2.5V,
3.3V, and as an adjustable device with a 1.20V reference
voltage. The package offerings include the 5-lead TO-220,
5-lead DD-Pak as well as the thermally enhanced 8-lead
MSOP and low profile (0.75mm) 8-lead 3mm
× 3mm DFN.
3.3V to 2.5V Regulator
n
Output Current: 1.1A
n
Dropout Voltage: 310mV
n
Low Noise: 40µVRMS (10Hz to 100kHz)
n
500µA Quiescent Current (Adjustable Version)
n
Wide Input Voltage Range: 1.8V to 20V
n
No Protection Diodes Needed
n
Controlled Quiescent Current in Dropout
n
Adjustable Output from 1.20V to 19.5V
n
Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
n
< 1µA Quiescent Current in Shutdown
n
Stable with 10µF Output Capacitor
n
Stable with Ceramic or Tantalum Capacitors
n
Reverse-Battery Protection
n
No Reverse Current
n
Current Limit with Foldback Protection
n
Thermal Limiting
n
5-Lead TO-220, DD-Pak, Thermally Enhanced 8-Lead
MSOP and 8-Lead 3mm × 3mm DFN Packages
n
Logic Power Supplies
n
Post Regulator for Switching Supplies
n
Low Noise Instrumentation
Dropout Voltage
typical application
OUTPUT CURRENT (A)
0
0
100
200
300
0.2
0.4
0.6
0.8
1
400
50
150
250
350
1.2
1965 TA01b
TJ = 25°C
IN
SHDN
10µF*
*CERAMIC OR TANTALUM
1965 TA01
OUT
VIN > 3V
TO 20V
SENSE
GND
LT1965-2.5
2.5V
1.1A
10µF*
+
+
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.


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