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LT3024 Datasheet, PDF (1/16 Pages) Linear Technology – Dual 100mA/500mA Low Dropout, Low Noise, Micropower Regulator
FEATURES
s Low Noise: 20µVRMS (10Hz to 100kHz)
s Low Quiescent Current: 30µA/Output
s Wide Input Voltage Range: 1.8V to 20V
s Output Current: 100mA/500mA
s Very Low Shutdown Current: <0.1µA
s Low Dropout Voltage: 300mV at 100mA/500mA
s Adjustable Outputs from 1.22V to 20V
s Stable with 1µF/3.3µF Output Capacitor
s Stable with Aluminum, Tantalum or
Ceramic Capacitors
s Reverse-Battery Protected
s No Reverse Current
s No Protection Diodes Needed
s Overcurrent and Overtemperature Protected
s Thermally Enhanced 16-Lead TSSOP and 12-Lead
(4mm × 3mm) DFN Packages
U
APPLICATIO S
s Cellular Phones
s Pagers
s Battery-Powered Systems
s Frequency Synthesizers
s Wireless Modems
, LTC and LT are registered trademarks of Linear Technology Corporation.
LT3024
Dual 100mA/500mA
Low Dropout, Low Noise,
Micropower Regulator
DESCRIPTIO
The LT®3024 is a dual, micropower, low noise, low drop-
out regulator. With an external 0.01µF bypass capacitor,
output noise drops to 20µVRMS over a 10Hz to 100kHz
bandwidth. Designed for use in battery-powered systems,
the low 30µA quiescent current per output makes it an
ideal choice. In shutdown, quiescent current drops to less
than 0.1µA. Shutdown control is independent for each
output, allowing for flexibility in power management. The
device is capable of operating over an input voltage range
of 1.8V to 20V. 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.
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.
Internal protection circuitry includes reverse-battery pro-
tection, current limiting, thermal limiting and reverse
current protection. The device is available as an adjustable
device with a 1.22V reference voltage. The LT3024 regu-
lator is available in the thermally enhanced 16-lead TSSOP
and 12-lead, low profile (4mm × 3mm × 0.75mm) DFN
packages.
TYPICAL APPLICATIO
VIN
3.7V TO
20V
3.3V/2.5V Low Noise Regulators
IN
OUT1
SHDN1
1µF
SHDN2 BYP1
ADJ1
LT3024
OUT2
BYP2
ADJ2
GND
0.01µF 422k
3.3V AT 500mA
20µVRMS NOISE
10µF
249k
0.01µF 261k
2.5V AT 100mA
10µF 20µVRMS NOISE
249k
3024 TA01a
10Hz to 100kHz Output Noise
VOUT
100µV/DIV
20µVRMS
3024 TA01b
3024f
1