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LT1965

1965f

ELECTRICAL CHARACTERISTICS

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 the IN pin at 22V, the OUT pin may not be pulled below 0V. The total

measured voltage from IN to OUT must not exceed ±22V.

Note 3: The LT1965 is tested and speciﬁed under pulse load conditions

such that TJ ≅ TA. The LT1965E is 100% tested at TA = 25°C. Performance

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

with statistical process controls. The LT1965I is guaranteed over the full

–40°C to 125°C operating junction temperature range.

Note 4: The LT1965 is tested and speciﬁed for these conditions with the

ADJ connected to the OUT pin.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Input Voltage (Notes 4, 12)

ILOAD = 0.5A

ILOAD = 1.1A

●

1.65

1.8

2.3

ADJ Pin Voltage (Notes 4, 5)

VIN = 2.1V, ILOAD = 1mA

2.3V < VIN < 20V, 1mA < ILOAD < 1.1A

●

1.182

1.164

1.20

1.218

1.236

Line Regulation (Note 4)

ΔVIN = 2.1V to 20V, ILOAD = 1mA

●

Load Regulation

VIN = 2.3V, ΔILOAD = 1mA to 1.1A

●

4.25

Dropout Voltage

VIN = VOUT(NOMINAL)

(Notes 6, 7, 12)

ILOAD = 1mA

●

0.05

0.08

0.14

ILOAD = 100mA

●

0.10

0.175

0.28

ILOAD = 500mA

●

0.19

0.25

0.36

ILOAD = 1.1A

●

0.29

0.36

0.49

GND Pin Current

VIN = VOUT(NOMINAL) + 1V

(Notes 6, 8)

ILOAD = 0mA

ILOAD = 1mA

ILOAD = 100mA

ILOAD = 500mA

ILOAD = 1.1A

●

0.5

0.6

2.2

8.2

1.1

1.5

5.5

Output Voltage Noise

COUT = 10μF, ILOAD = 1.1A, BW = 10Hz to 100kHz

μVRMS

ADJ Pin Bias Current (Notes 4, 9)

1.3

4.5

μA

Shutdown Threshold

VOUT = Off to On

VOUT = On to Off

●

0.2

0.85

0.45

⎯S⎯H⎯D⎯N Pin Current (Note 10)

V⎯S⎯H⎯D⎯N = 0V

V⎯S⎯H⎯D⎯N = 20V

0.01

5.5

μA

Quiescent Current in Shutdown

VIN = 6V, V⎯S⎯H⎯D⎯N = 0V

0.01

μA

Ripple Rejection

VIN – VOUT = 1.5V (AVG), VRIPPLE = 0.5VP-P,

fRIPPLE = 120Hz, ILOAD = 0.75A

Current Limit

VIN = 7V, VOUT = 0

VIN = VOUT(NOMINAL) + 1V, ΔVOUT = -0.1V (Note 6)

●

1.2

Input Reverse Leakage Current

VIN = –20V, VOUT = 0

Reverse Output Current (Note 11)

VOUT = 1.2V, VIN < 1.2V (Note 4)

175

400

μA

The ● denotes the speciﬁcations which apply over the full operating

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

Note 5: Maximum junction temperature limits operating conditions. The

regulated output voltage speciﬁcation does not apply for all possible

combinations of input voltage and output current. Limit the output current

range if operating at the maximum input voltage. Limit the input-to-output

voltage differential if operating at the maximum output current.

Note 6: To satisfy minimum input voltage requirements, the LT1965 is

tested and speciﬁed for these conditions with an external resistor divider

(bottom 4.02k, top 4.32k) for an output voltage of 2.5V. The external

resistor divider adds 300μA of output DC load current.

Note 7: Dropout voltage is the minimum input-to-output voltage

differential needed to maintain regulation at a speciﬁed output current. In

dropout, the output voltage equals: (VIN – VDROPOUT)

Note 8: GND pin current is tested with VIN = VOUT(NOMINAL) + 1V and a

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

GND pin current curves in the Typical Performance Characteristics section.

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