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LT3065 Series

3065fc

For more information www.linear.com/LT3065

elecTrical characTerisTics The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C (Note 3).

SHDN Pin Current (Note 11)

VSHDN = 0V, VIN = 45V

VSHDN = 45V, VIN = 45V

0.5

±1

µA

Ripple Rejection

VIN – VOUT = 2V, VRIPPLE = 0.5VP-P,

fRIPPLE = 120Hz, ILOAD = 500mA

LT3065-1.2

LT3065-1.5

LT3065-1.8

LT3065-2.5

LT3065-3.3

LT3065-5

LT3065

Input Reverse Leakage Current

VIN = –45V, VOUT = 0

300

µA

Reverse Output Current (Note 12)

VOUT = 1.2V, VIN = VSHDN = 0

µA

Internal Current Limit (Note 4)

VIN = 2.2V, VOUT = 0, VIMAX = 0

VIN = 2.2V, ΔVOUT = –5%

520

900

External Programmed Current Limit

(Notes 7, 13)

5.6V < VIN < 10V, VOUT = 95% of VOUT (Nominal), RIMAX = 1.5k

5.6V < VIN < 7V, VOUT = 95% of VOUT (Nominal), RIMAX = 604Ω

180

445

200

495

220

545

PWRGD Logic Low Voltage

Pull-Up Current = 50µA

0.07

0.25

PWRGD Leakage Current

VPWRGD = 45V

0.01

µA

PWRGD Trip Point

% of Nominal Output Voltage, Output Rising

PWRGD Trip Point Hysteresis

% of Nominal Output Voltage

1.6

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: Absolute maximum input-to-output differential voltage is not

achievable with all combinations of rated IN pin and OUT pin voltages.

With IN at 50V, do not pull OUT below 0V. The total differential voltage

from IN to OUT must not exceed +50V, –40V. If OUT is pulled above IN

and GND, the OUT to IN differential voltage must not exceed 40V.

Note 3: The LT3065 regulator is tested and specified under pulse

load conditions such that TJ ≅ TA. The LT3065E regulators are 100%

tested at TA = 25°C and performance is guaranteed from 0°C to 125°C.

Performance at –40°C to 125°C is assured by design, characterization and

correlation with statistical process controls. The LT3065I regulators are

guaranteed over the full –40°C to 125°C operating junction temperature

range. The LT3065MP regulators are 100% tested over the –55°C to

150°C operating junction temperature range. The LT3065H regulators are

100% tested at the 150°C operating junction temperature. High junction

temperatures degrade operating lifetimes. Operating lifetime is derated at

junction temperatures greater than 125°C.

Note 4: The LT3065 adjustable version is tested and specified for these

conditions with the ADJ pin connected to the OUT pin.

Note 5: Maximum junction temperature limits operating conditions.

Regulated output voltage specifications do not apply for all possible

combinations of input voltage and output current. If operating at the

maximum input voltage, limit the output current range. If operating at

the maximum output current, limit the input voltage range. Current limit

foldback limits the maximum output current as a function of input-to-

output voltage. See Current Limit vs VIN – VOUT in the Typical Performance

Characteristics section.

Note 6: Dropout voltage is the minimum IN-to-OUT differential voltage

needed to maintain regulation at a specified output current. In dropout,

the output voltage equals (VIN – VDROPOUT). For some output voltages,

minimum input voltage requirements limit dropout voltage.

Note 7: To satisfy minimum input voltage requirements, the LT3065 is

tested and specified for these conditions with an external resistor divider

(60.4k bottom, 442k top) which sets VOUT to 5V. The divider adds 10uA of

output DC load. This external current is not factored into GND pin current.

Note 8: GND pin current is tested with VIN = VOUT(NOMINAL) + 0.6V and a

current source load. GND pin current increases in dropout. See GND pin

current curves in the Typical Performance Characteristics section.

Note 9: To satisfy requirements for minimum input voltage, current limit is

tested at VIN = VOUT(NOMINAL) + 1V or VIN = 2.2V, whichever is greater.

Note 10: ADJ pin bias current flows out of the ADJ pin.

Note 11: SHDN pin current flows into the SHDN pin.

Note 12: Reverse output current is tested with the IN pin grounded and the

OUT pin forced to the specified voltage. This current flows into the OUT

pin and out of the GND pin.

Note 13: Current limit varies inversely with the external resistor value tied

from the IMAX pin to GND. For detailed information on selecting the IMAX

resistor value, see the Operation section. If the externally programmed

current limit feature is unused, tie the IMAX pin to GND. The internal

current limit circuitry implements short-circuit protection as specified.

Note 14: This IC includes over temperature protection that protects the

device during overload conditions. Junction temperature exceeds 125°C

(LT3065E, LT3065I) or 150°C (LT3065MP, LT3065H) when the over

temperature circuitry is active. Continuous operation above the specified

maximum junction temperature may impair device reliability.

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