3012B View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'3012B' PDF : 16 Pages View PDF
LT3012B
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C.
PARAMETER
CONDITIONS
MIN TYP MAX
Dropout Voltage
VIN = VOUT(NOMINAL)
ILOAD = 10mA
ILOAD = 10mA
160 230
●
300
(Notes 4, 5)
ILOAD = 50mA
ILOAD = 50mA
250 340
●
420
GND Pin Current
VIN = 4.5V
(Notes 4, 6)
ILOAD = 250mA
ILOAD = 250mA
ILOAD = 0mA
ILOAD = 100mA
ILOAD = 250mA
400 490
●
620
●
40
100
3
●
10
18
Output Voltage Noise
COUT = 10µF, ILOAD = 250mA, BW = 10Hz to 100kHz
100
ADJ Pin Bias Current
(Note 7)
30
100
Ripple Rejection
VIN = 7V(Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 250mA
65
75
Current Limit
Reverse Output Current (Note 8)
VIN = 7V, VOUT = 0V
VIN = 4.5V, ∆VOUT = –0.1V (Note 2)
VOUT = 1.24V, VIN < 1.24V (Note 2)
400
● 270
12
25
UNITS
mV
mV
mV
mV
mV
mV
µA
mA
mA
µVRMS
nA
dB
mA
mA
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 LT3012B 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 LT3012B
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 LT3012BE 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.
3012bf
3
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