LT3065_15 Datasheet, PDF (1/28 Pages) Linear Technology – 45V VIN, 500mA Low Noise, Linear Regulator with Programmable Current Limit and Power Good

LT3065 Series
FEATURES
45V V_IN, 500mA Low Noise,
Linear Regulator with Programmable
Current Limit and Power Good
DESCRIPTION
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: 25µVRMS (10Hz to 100kHz)}
n _{Adjustable Output (VREF = VOUT(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
APPLICATIONS
n _{Battery-Powered Systems}
n _{Automotive Power Supplies}
n _{Industrial Power Supplies}
n _{Avionic Power Supplies}
n _{Portable Instruments}
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.
L, LT, LTC, LTM, 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.
TYPICAL APPLICATION
5V Supply with 200mA Precision Current Limit
5.6V TO 13V
IN
3.3µF _500k
IN
OUT
LT3065-5
SHDN
PWRGD
SENSE
ADJ
5V
OUT
200mA
1nF
3.3µF
REF/BYP
I_MAX
10nF
GND
1.5k
22nF
3065 TA01a
Precision Current Limit, R_IMAX = 1.5k
220
V_OUT(NOMINAL) = 5V
216
212
208
204
V_IN = 10V
200
V_IN = 5.6V
196
192
188
184
180
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3065 TA01b
3065fb
For more information www.linear.com/LT3065
1