LT1761ES5-SD 查看數據表（PDF） - Linear Technology
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LT1761ES5-SD Datasheet PDF : 22 Pages
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LT1761 Series
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)
Output Voltage Noise
ADJ Pin Bias Current
ILOAD = 0mA
l
ILOAD = 1mA
l
ILOAD = 10mA
l
ILOAD = 50mA
l
ILOAD = 100mA
l
COUT = 10μF, CBYP = 0.01μF, ILOAD = 100mA, BW = 10Hz to 100kHz
(Notes 3, 8)
20
45
55
100
230 400
1
2
2.2
4
20
30
100
μA
μA
μA
mA
mA
μVRMS
nA
Shutdown Threshold
SHDN Pin Current
(Note 9)
VOUT = Off to On
VOUT = On to Off
VSHDN = 0V
VSHDN = 20V
l
0.8
2
V
l 0.25 0.65
V
l
0
0.5
μA
l
1
3
μA
Quiescent Current in Shutdown
VIN = 6V, VSHDN = 0V
0.01 0.1
μA
Ripple Rejection (Note 3)
VIN – VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz,
55
65
dB
ILOAD = 50mA
Current Limit
VIN = 7V, VOUT = 0V
200
mA
VIN = VOUT(NOMINAL) + 1V or 2.3V (Note 12), ΔVOUT = –5%
l 110
mA
Input Reverse Leakage Current
VIN = –20V, VOUT = 0V
l
1
mA
Reverse Output Current
(Note 10)
LT1761-1.2
LT1761-1.5
LT1761-1.8
LT1761-2
LT1761-2.5
LT1761-2.8
LT1761-3
LT1761-3.3
LT1761-5
LT1761 (Note 3)
VOUT = 1.2V, VIN < 1.2V
VOUT = 1.5V, VIN < 1.5V
VOUT = 1.8V, VIN < 1.8V
VOUT = 2V, VIN < 2V
VOUT = 2.5V, VIN < 2.5V
VOUT = 2.8V, VIN < 2.8V
VOUT = 3V, VIN < 3V
VOUT = 3.3V, VIN < 3.3V
VOUT = 5V, VIN < 5V
VOUT = 1.22V, VIN < 1.22V
10
20
μA
10
20
μA
10
20
μA
10
20
μA
10
20
μA
10
20
μA
10
20
μA
10
20
μA
10
20
μA
5
10
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 LT1761 regulators are tested and specified under pulse load
conditions such that TJ ≈ TA. The LT1761E is 100% production tested
at TA = 25°C. Performance at –40°C and 125°C is assured by design,
characterization and correlation with statistical process controls. The
LT1761I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT1761MP is 100% tested and guaranteed over
the –55°C to 125°C operating junction temperature range.
Note 3: The LT1761 (adjustable versions) are 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 LT1761
(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
(whichever is greater) and a current source load. This means the device
is tested while operating in its dropout region or at the minimum input
voltage specification. 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 LT1761, LT1761-1.2, LT1761-1.5, LT1761-1.8 and
LT1761-2 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 VIN = 2.3V, whichever is greater.
1761sff
6
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