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LT3070IUFDPBF Datasheet(PDF) 5 Page - Linear Technology

Part # LT3070IUFDPBF
Description  5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3070IUFDPBF Datasheet(HTML) 5 Page - Linear Technology

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LT3070
5
3070p
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. COUT = 15μF (Note 9), VIN = VOUT + 0.3V (Note 5), VBIAS = 2.5V unless
otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VBIAS Ripple Rejection
VBIAS = VOUT + 1.5VAVG, VRIPPLE =0.5VP-P , fRIPPLE = 120Hz,
VIN – VOUT = 300mV, IOUT = 2.5A
60
72
dB
VIN Ripple Rejection (Notes 3, 4, 5)
VBIAS = 2.5V, VIN – VOUT = 300mV, IOUT = 2.5A,
VRIPPLE = 50mVP-P, fRIPPLE = 120Hz
60
68
dB
Reference Voltage Noise (REF/BYP Pin)
CREF/BYP = 10nF, BW = 10Hz to 100kHz
10
μVRMS
Output Voltage Noise
VOUT = 1V, IOUT = 5A, CREF/BYP = 10nF, COUT = 15μF,
BW = 10Hz to 100kHz
25
μVRMS
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 LT3070 regulators are tested and specified under pulse load
conditions such that TJ ≅ TA. The LT3070E 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 LT3070I is
guaranteed over the –40°C to 125°C operating junction temperature range.
The LT3070MP is 100% tested and guaranteed over the –55°C to 125°C
operating junction temperature range.
Note 3: To maintain proper performance and regulation, the BIAS supply
voltage must be higher than the IN supply voltage. For a given VOUT, the
BIAS voltage must be in the range: (1.2 • VOUT + 935mV) ≤ VBIAS ≤ 3.6V.
Note 4: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification does not apply
for all possible combinations of input voltage and output current. When
operating at maximum output current, limit the input voltage range to:
VIN < VOUT + 500mV.
Note 5: The LT3070 incorporates safe operating area protection circuitry.
Current limit decreases as the VIN-VOUT voltage increases. Current limit
foldback starts at VIN – VOUT > 500mV. See the Typical Performance
Characteristics for a graph of Current Limit vs VIN – VOUT voltage. The
current limit foldback feature is independent of the thermal shutdown
circuity.
Note 6: Dropout voltage, VDO, is the minimum input to output voltage
differential at a specified output current. In dropout, the output voltage
equals VIN – VDO.
Note 7: GND pin current is tested with VIN = VOUT(NOMINAL) + 300mV and a
current source load. VIOC is a buffered output determined by the value of
VOUT as programmed by the VO2-VO0 pins. VIOC’s output is independent of
the margining function.
Note 8: Reverse output current is tested with the IN pins grounded and the
OUT + SENSE pins forced to the rated output voltage. This is measured as
current into the OUT + SENSE pins.
Note 9: Frequency Compensation: The LTC3070 must be frequency
compensated at its OUT pins with a minimum COUT of 15μF configured
as a cluster of (15
×) 1μF ceramic capacitors or as a graduated cluster
of 10μF/4.7μF/2.2μF ceramic capacitors of the same case size. Linear
Technology only recommends X5R or X7R dielectric capacitors.


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