LT3027
Dual 100mA,
Low Dropout, Low Noise,
Micropower Regulator with
Independent Inputs
FEATURES DESCRIPTIO
Low Noise: 20V (10Hz to 100kHz)
RMS The LT 3027 is a dual, micropower, low noise, low drop-
Low Quiescent Current: 25A/Channel
out regulator with independent inputs. With an external
Independent Inputs
0.01F bypass capacitor, output noise is a low 20V
RMS
Wide Input Voltage Range: 1.8V to 20V
over a 10Hz to 100kHz bandwidth. Designed for use in
Output Current: 100mA/Channel
battery-powered systems, the low 25A quiescent current
Very Low Shutdown Current: <0.1A
per channel makes it an ideal choice. In shutdown, quies-
Low Dropout Voltage: 300mV at 100mA
cent current drops to less than 0.1A. Shutdown control
Adjustable Output from 1.22V to 20V
is independent for each channel, allowing for flexibility in
Stable with 1F Output Capacitor
power management. The device is capable of operating
Stable with Aluminum, Tantalum or
over an input voltage from 1.8V to 20V, and can supply
Ceramic Capacitors
100mA of output current from each channel with a drop-
Reverse Battery Protected
out voltage of 300mV. Quiescent current is well controlled
No Protection Diodes Needed
in dropout.
Overcurrent and Overtemperature Protected
The LT3027 regulator is stable with output capacitors as
Tracking/Sequencing Capability
low as 1F. Small ceramic capacitors can be used without
Thermally Enhanced 10-Lead MSOP and DFN
the series resistance required by other regulators.
Packages
Internal protection circuitry includes reverse battery pro-
U
tection, current limiting and thermal limiting protection.
APPLICATIO S
The device is available as an adjustable device with a
Cellular Phones
1.22V reference voltage. The LT3027 regulator is available
Pagers
in the thermally enhanced 10-lead MSOP and low profile
Battery-Powered Systems
(0.75mm) 3mm 3mm DFN packages.
Frequency Synthesizers
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Wireless Modems
Protected by U.S. Patents, including 6118263, 6144250.
Tracking/Sequencing Power Supplies
TYPICAL APPLICATIO
3.3V/2.5V Low Noise Regulators
10Hz to 100kHz Output Noise
3.3V AT 100mA
IN1 OUT1
V 20V NOISE
RMS
IN1
3.7V TO
1F SHDN1 0.01F
10F
422k
20V
BYP1
ADJ1
249k
V
OUT
LT3027 20V
RMS
100V/DIV
2.5V AT 100mA
IN2
OUT2
V 20V NOISE
IN2 RMS
2.9V TO
1F SHDN2 0.01F
10F
261k
20V
BYP2
ADJ2
3027 TA01b
GND 249k
3027 TA01
3027fa
1
U
ULT3027
(Note 1)
ABSOLUTE AXI U RATI GS
IN1, IN2 Pin Voltage .............................................. 20V
Operating Junction Temperature Range
OUT1, OUT2 Pin Voltage ....................................... 20V
(Note 2) ............................................ 40C to 125C
Input to Output Differential Voltage ....................... 20V
Storage Temperature Range
ADJ1, ADJ2 Pin Voltage ......................................... 7V
DD Package ...................................... 65C to 125C
BYP1, BYP2 Pin Voltage ....................................... 0.6V
MSE Package ................................... 65C to 150C
SHDN1, SHDN2 Pin Voltage ................................. 20V
Lead Temperature (Soldering, 10 sec).................. 300C
Output Short-Circut Duration.......................... Indefinite
UUW
PACKAGE/ORDER I FOR ATIO
ORDER PART
ORDER PART
TOP VIEW
NUMBER NUMBER
TOP VIEW
BYP2 1 10 OUT2
BYP2 1 10 OUT2
LT3027EDD LT3027EMSE
ADJ2 2 9 IN2
ADJ2 2 9 IN2
11
SHDN2 3 8 IN1
11 LT3027IDD LT3027IMSE
SHDN2 3 8 IN1
ADJ1 4 7 SHDN1
ADJ1 4 7 SHDN1
BYP1 5 6 OUT1
BYP1 5 6 OUT1
MSE PACKAGE
DD PART
MSE PART
10-LEAD PLASTIC MSOP
MARKING MARKING
EXPOSED PAD (PIN 11) IS GND
DD PACKAGE
MUST BE SOLDERED TO PCB
10-LEAD (3mm 3mm) PLASTIC DFN
EXPOSED PAD (PIN 11) IS GND
T = 150C, = 40C/ W, = 10C/ W
LBKM LTBKK
JMAX JA JC
MUST BE SOLDERED TO PCB
LBMC LTBMD
T = 125C, = 43C/ W, = 3C/ W
JMAX JA JC
Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: