LT3013B 查看數據表（PDF） - Linear Technology
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LT3013B Datasheet PDF : 16 Pages
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LT3013B
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Minimum Input Voltage
ADJ Pin Voltage (Notes 2, 3)
Line Regulation
Load Regulation (Note 2)
Dropout Voltage
VIN = VOUT(NOMINAL)
(Notes 4, 5)
GND Pin Current
VIN = 4.5V
(Notes 4, 6)
Output Voltage Noise
ADJ Pin Bias Current
ILOAD = 250mA
VIN = 4V, ILOAD = 1mA
4.5V < VIN < 80V, 1mA < ILOAD < 250mA
ΔVIN = 4V to 80V, ILOAD = 1mA (Note 2)
VIN = 4.5V, ΔILOAD = 1mA to 250mA
VIN = 4.5V, ΔILOAD = 1mA to 250mA
ILOAD = 10mA
ILOAD = 10mA
ILOAD = 50mA
ILOAD = 50mA
ILOAD = 250mA
ILOAD = 250mA
ILOAD = 0mA
ILOAD = 100mA
ILOAD = 250mA
COUT = 10μF, ILOAD = 250mA, BW = 10Hz to 100kHz
(Note 7)
l
4
4.5
V
1.225 1.24 1.255
V
l 1.2
1.24
1.28
V
l
0.1
5
mV
l
7
12
mV
25
mV
160
230
mV
l
300
mV
250
340
mV
l
420
mV
400
490
mV
l
620
mV
l
65
120
μA
3
mA
l
10
18
mA
100
μVRMS
30
100
nA
PWRGD Trip Point
% of Nominal Output Voltage, Output Rising
l 85
90
94
%
PWRGD Trip Point Hysteresis
% of Nominal Output Voltage
1.1
%
PWRGD Output Low Voltage
IPWRGD = 50μA
l
140
250
mV
CT Pin Charging Current
3.6
6
μA
CT Pin Voltage Differential
VCT(PWRGD High) – VCT(PWRGD Low)
1.6
V
Ripple Rejection
VIN = 7V(Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 250mA
65
75
dB
Current Limit
VIN = 7V, VOUT = 0V
VIN = 4.5V, ΔVOUT = –0.1V (Note 2)
400
mA
l 270
mA
Reverse Output Current (Note 8) VOUT = 1.24V, VIN < 1.24V (Note 2)
12
25
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 LT3013B is tested and specified for these conditions with the
ADJ pin connected to the OUT pin.
Note 3: 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 4: To satisfy requirements for minimum input voltage, the LT3013B is
tested and specified for these conditions with an external resistor divider
(249k bottom, 549k top) for an output voltage of 4V. The external resistor
divider will add a 5μA DC load on the output.
Note 5: 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 6: GND pin current is tested with VIN = 4.5V and a current source
load. This means the device is tested while operating close to its dropout
region. This is the worst-case GND pin current. The GND pin current will
decrease slightly at higher input voltages.
Note 7: ADJ pin bias current flows into the ADJ pin.
Note 8: 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 9: The LT3013BE is guaranteed to meet performance specifications
from 0°C to 125°C operating junction temperature. Specifications over
the –40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
Note 10: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
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3
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