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LT1761ES5-1.8 Datasheet

  • LT1761ES5-1.8

  • 100mA, Low Noise, LDO Micropower Regulators in SOT-23

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LT1761 Series
100mA, Low Noise,
LDO Micropower
Regulators in SOT-23
FEATURES
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DESCRIPTIO
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Tiny 5-Lead SOT-23 Package
Low Noise: 20碌V
RMS
(10Hz to 100kHz)
Low Quiescent Current: 20碌A(chǔ)
Wide Input Voltage Range: 1.8V to 20V
Output Current: 100mA
Very Low Shutdown Current: < 0.1
A
Low Dropout Voltage: 300mV at 100mA
Fixed Output Voltages: 1.5V, 1.8V, 2V, 2.5V, 2.8V,
3V, 3.3V, 5V
Adjustable Output from 1.22V to 20V
Stable with 1碌F Output Capacitor
Stable with Aluminum, Tantalum or
Ceramic Capacitors
Reverse Battery Protected
No Reverse Current
No Protection Diodes Needed
Overcurrent and Overtemperature Protected
APPLICATIO S
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s
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Cellular Phones
Pagers
Battery-Powered Systems
Frequency Synthesizers
Wireless Modems
The LT
1761 series are micropower, low noise, low
dropout regulators. With an external 0.01碌F bypass
capacitor, output noise drops to 20碌V
RMS
over a 10Hz to
100kHz bandwidth. Designed for use in battery-powered
systems, the low 20碌A(chǔ) quiescent current makes them an
ideal choice. In shutdown, quiescent current drops to less
than 0.1碌A(chǔ). The devices are capable of operating over an
input voltage from 1.8V to 20V, and can supply 100mA of
output current with a dropout voltage of 300mV. Quies-
cent current is well controlled, not rising in dropout as it
does with many other regulators.
The LT1761 regulators are stable with output capacitors
as low as 1碌F. Small ceramic capacitors can be used
without the series resistance required by other regulators.
Internal protection circuitry includes reverse battery pro-
tection, current limiting, thermal limiting and reverse
current protection. The device is available in fixed output
voltages of 1.5V, 1.8V, 2V, 2.5V, 2.8V, 3V, 3.3V and 5V,
and as an adjustable device with a 1.22V reference voltage.
The LT1761 regulators are available in the 5-lead SOT-23
package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
10Hz to 100kHz Output Noise
5V Low Noise Regulator
IN
1碌F
OUT
LT1761-5
SHDN
GND
BYP
1761 TA01
V
IN
5.4V TO
20V
0.01碌F
+
5V AT100mA
20碌V
RMS
NOISE
10碌F
V
OUT
100碌V/DIV
U
20碌V
RMS
1761 G48
U
U
1

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