LT3070EUFD-TRPBF 查看數據表（PDF） - Linear Technology

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LT3070EUFD-TRPBF

5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator

Linear Technology 

LT3070

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

VBIAS Ripple Rejection

VIN Ripple Rejection (Notes 3, 4, 5)

Reference Voltage Noise (REF/BYP Pin)

Output Voltage Noise

CONDITIONS

VBIAS = VOUT + 1.5VAVG, VRIPPLE =0.5VP-P , fRIPPLE = 120Hz,

VIN – VOUT = 300mV, IOUT = 2.5A

VBIAS = 2.5V, VIN – VOUT = 300mV, IOUT = 2.5A,

VRIPPLE = 50mVP-P, fRIPPLE = 120Hz

CREF/BYP = 10nF, BW = 10Hz to 100kHz

VOUT = 1V, IOUT = 5A, CREF/BYP = 10nF, COUT = 15μF,

BW = 10Hz to 100kHz

MIN

TYP

MAX

UNITS

60

72

dB

60

68

dB

10

μVRMS

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.

3070p

5

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