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LT3065 Series
1
3065fb
For more information www.linear.com/LT3065
TYPICAL APPLICATION
FEATURES DESCRIPTION
45V V
IN
, 500mA Low Noise,
Linear Regulator with Programmable
Current Limit and Power Good
The LT
®
3065 Series are micropower, low noise, low dropout
voltage (LDO) linear regulators that operate over a 1.8V
to 45V input voltage range. The devices supply 500mA of
output current with a typical dropout voltage of 300mV. A
single external capacitor provides programmable low noise
reference performance and output soft-start functionality.
A single external resistor programs the LT3065’s current
limit, accurate to ±10% over a wide input voltage and tem
-
perature range
.
A PWRGD flag indicates output regulation.
The LT3065 optimizes stability and transient response
with low ESR ceramic capacitors, requiring a minimum of
3.3µF. Internal protection circuitry includes current limiting
with foldback, thermal limiting, reverse battery protection,
reverse current protection and reverse output protection.
The LT3065 is available in fixed output voltages of 1.2V,
1.5V, 1.8V, 2.5V, 3.3V, and 5V, and as an adjustable de
-
vice with
an output voltage range from 0.6V to 40V. The
LT3065
is available in the thermally-enhanced 10-lead
3mm × 3mm DFN and 12-lead MSOP packages.
5V Supply with 200mA Precision Current Limit
APPLICATIONS
n
Input Voltage Range: 1.8V to 45V
n
Output Current: 500mA
n
Dropout Voltage: 300mV
n
Programmable Precision Current Limit: ±10%
n
Power Good Flag
n
Low Noise: 25µV
RMS
(10Hz to 100kHz)
n
Adjustable Output (V
REF
= V
OUT(MIN)
= 600mV)
n
Output Tolerance: ±2% Over Line, Load and
Temperature
n
Stable with Low ESR, Ceramic Output Capacitors
(3.3µF Minimum)
n
Single Capacitor Soft-Starts Reference and Lowers
Output Noise
n
Current Limit Foldback Protection
n
Shutdown Current: <1µA
n
Reverse Battery and Thermal Limit Protection
n
10-Lead 3mm × 3mm DFN and 12-lead MSOP
Packages
n
Battery-Powered Systems
n
Automotive Power Supplies
n
Industrial Power Supplies
n
Avionic Power Supplies
n
Portable Instruments
L, LT, LT C , LT M, 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.
Precision Current Limit, R
IMAX
= 1.5k
TEMPERATURE (°C)
–75
CURRENT LIMIT (mA)
204
212
220
125
3065 TA01b
196
188
200
208
216
192
184
180
–25
25
75
–50 150
0
50
100
175
V
IN
= 5.6V
V
IN
= 10V
V
OUT(NOMINAL)
= 5V
LT3065-5
GND
500k
10nF
OUT
SENSE
ADJ
I
MAX
IN
SHDN
PWRGD
REF/BYP
3.3µF
5.6V TO 13V
IN
5V
OUT
200mA
3.3µF
1.5k
22nF
3065 TA01a
1nF
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