LT3024
Dual 100mA/500mA
Low Dropout, Low Noise,
Micropower Regulator
FEATURES
DESCRIPTION
TheLT®3024isadual, micropower, lownoise, lowdropout
regulator.Withanexternal0.01μFbypasscapacitor,output
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Low Noise: 20μV
(10Hz to 100kHz)
RMS
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Low Quiescent Current: 30μA/Output
Wide Input Voltage Range: 1.8V to 20V
Output Current: 100mA/500mA
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noisedropsto20μV
overa10Hzto100kHzbandwidth.
RMS
Designedforuseinbattery-poweredsystems,thelow30μA
quiescent current per output makes it an ideal choice. In
shutdown, quiescent current drops to less than 0.1μA.
Shutdowncontrolisindependentforeachoutput,allowing
for flexibility in power management. The device is capable
ofoperatingoveraninputvoltagerangeof1.8Vto20V.The
device can supply 100mA of output current from Output
2 with a dropout voltage of 300mV. Output 1 can supply
500mA of output current with a dropout voltage of 300mV.
Quiescent current is well controlled in dropout.
Very Low Shutdown Current: <0.1μA
Low Dropout Voltage: 300mV at 100mA/500mA
Adjustable Outputs from 1.22V to 20V
Stable with 1μF/3.3μF Output Capacitor
Stable with Aluminum, Tantalum or
Ceramic Capacitors
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Reverse Battery Protected
No Reverse Current
No Protection Diodes Needed
Overcurrent and Overtemperature Protected
Thermally Enhanced 16-Lead TSSOP and 12-Lead
(4mm × 3mm) DFN Packages
The LT3024 regulator is stable with output capacitors as
low as 1μF for the 100mA output and 3.3μF for the 500mA
output. Small ceramic capacitors can be used without the
series resistance required by other regulators.
APPLICATIONS
Internal protection circuitry includes reverse-battery
protection, current limiting, thermal limiting and reverse
current protection. The device is available as an adjust-
able device with a 1.22V reference voltage. The LT3024
regulator is available in the thermally enhanced 16-lead
TSSOP and 12-lead, low profile (4mm × 3mm × 0.75mm)
DFN packages.
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Cellular Phones
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Pagers
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Battery-Powered Systems
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Frequency Synthesizers
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Wireless Modems
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
3.3V/2.5V Low Noise Regulators
10Hz to 100kHz Output Noise
3.3V AT 500mA
20μV NOISE
IN
OUT1
RMS
V
IN
0.01μF
10μF
10μF
SHDN1
SHDN2
422k
249k
1μF
3.7V TO
20V
BYP1
ADJ1
LT3024
V
OUT
20μV
RMS
100μV/DIV
2.5V AT 100mA
20μV NOISE
OUT2
RMS
0.01μF
261k
BYP2
ADJ2
GND
249k
3024 TA01b
3024 TA01a
3024fa
1