LT1763_1 datasheet(5/20 Pages) LINER

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LT1763 Series

1763fe

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. (Note 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

GND Pin Current

VIN = VOUT(NOMINAL)

(Notes 5, 7)

ILOAD = 0mA

ILOAD = 1mA

ILOAD = 50mA

ILOAD = 100mA

ILOAD = 250mA

ILOAD = 500mA

1.1

120

1.6

μA

Output Voltage Noise

COUT = 10μF, CBYP = 0.01μF, ILOAD = 500mA, BW = 10Hz to 100kHz

μVRMS

ADJ Pin Bias Current

(Notes 3, 8)

100

Shutdown Threshold

VOUT = Off to On

VOUT = On to Off

0.25

0.8

0.65

SHDN Pin Current

(Note 9)

VSHDN = 0V

VSHDN = 20V

0.1

μA

Quiescent Current in Shutdown

VIN = 6V, VSHDN = 0V

0.1

μA

Ripple Rejection

VIN – VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz,

ILOAD = 500mA

Current Limit

VIN = 7V, VOUT = 0V

C, I Grade: VIN = VOUT(NOMINAL) + 1V or 2.3V (Note 12), ΔVOUT = –0.1V

MP Grade: VIN = 2.35V (Note 12), ΔVOUT = –0.1V

520

Input Reverse Leakage Current

VIN = –20V, VOUT = 0V

1mA

Reverse Output Current

(Note 10)

LT1763-1.5

VOUT = 1.5V, VIN < 1.5V

LT1763-1.8

VOUT = 1.8V, VIN < 1.8V

LT1763-2.5

VOUT = 2.5V, VIN < 2.5V

LT1763-3

VOUT = 3V, VIN < 3V

LT1763-3.3

VOUT = 3.3V, VIN < 3.3V

LT1763-5

VOUT = 5V, VIN < 5V

LT1763 (Note 3) VOUT = 1.22V, VIN < 1.22V

μA

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: The LT1763 regulators are tested and speciﬁed under pulse

load conditions such that TJ ≅ TA. The LT1763 (C grade) 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

LT1763 (I grade) is guaranteed over the full –40°C to 125°C operating

junction temperature range. The LT1763 (MP grade) is 100% tested and

guaranteed over the –55°C to 125°C operating junction temperature range.

Note 3: The LT1763 (adjustable version) is tested and speciﬁed for these

conditions with the ADJ pin connected to the OUT pin.

Note 4: Operating conditions are limited by maximum junction

temperature. The regulated output voltage speciﬁcation will not apply

for all possible combinations of input voltage and output current. When

operating at maximum input voltage, the output current range must be

limited. When operating at maximum output current, the input voltage

range must be limited.

Note 5: To satisfy requirements for minimum input voltage, the LT1763

(adjustable version) is tested and speciﬁed for these conditions with an

external resistor divider (two 250k resistors) for an output voltage of

2.44V. The external resistor divider will add a 5μA DC load on the output.

Note 6: Dropout voltage is the minimum input to output voltage differential

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

output voltage will be equal to: VIN – VDROPOUT.

Note 7: GND pin current is tested with VIN = VOUT(NOMINAL) or VIN = 2.3V

(C, I grade) or 2.35V (MP grade), whichever is greater, and a current

source load. This means the device is tested while operating in its dropout

region. This is the worst-case GND pin current. The GND pin current will

decrease slightly at higher input voltages.

Note 8: ADJ pin bias current ﬂows into the ADJ pin.

Note 9:

SHDN pin current ﬂows into the SHDN pin.

Note 10: Reverse output current is tested with the IN pin grounded and the

OUT pin forced to the rated output voltage. This current ﬂows into the OUT

pin and out the GND pin.

Note 11: For the LT1763, LT1763-1.5 and LT1763-1.8 dropout voltage will

be limited by the minimum input voltage speciﬁcation under some output

voltage/load conditions. See the curve of Minimum Input Voltage in the

Typical Performance Characteristics.

Note 12: To satisfy requirements for minimum input voltage, current limit

is tested at VIN = VOUT(NOMINAL) + 1V or 2.3V (C, I grade) or 2.35V

(MP grade), whichever is greater.

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