LP8345 datasheet(6/13 Pages) NSC

6 / 13 page

LP8345I Electrical Characteristics (Continued)

Unless otherwise specified all limits guaranteed for V

IN =VO+ 1V, CIN =COUT = 10µF, TJ = 25˚C. Boldface limits apply over

the full operating temperature range of T

J = −40˚C to 125˚C

Symbol

Parameter

Conditions

Min

(Note 5)

Typ

(Note 4)

Max

(Note 5)

Units

∆V

Line Regulation

OUT + 0.5V

≤V

≤10V, I

OUT = 25mA

(Note 7)

IN −VO

Dropout Voltage

(Note 7) (Note 8)

LP8345-2.5

OUT = 500mA

335

650

LP8345-3.3

LP8345-ADJ, V

OUT = 3.3V, IOUT = 500mA

270

500

LP8345-5.0

OUT = 500mA

210

400

Quiescent Current

≤10V

µA

Minimum Load Current

IN −VOUT

≤4V

100

µA

LIMIT

Foldback Current Limit

IN −VOUT >5V

450

IN −VOUT <4V

1200

Ripple Rejection Ratio

IN (dc) = VOUT +2V

IN (ac) = 1VP-P @ 120Hz

Thermal Shutdown

Temp.

Thermal Shutdown Hyst.

160

˚C

ADJ Input Leakage

Current

ADJ = 1.5V or 0V

±0.01

±100

OUT Leakage Current

LP8345-ADJ

ADJ = OUT, V

OUT = 2V, VIN = 10V

µA

LP8345-1.8, V

OUT = 2.5V, VIN = 10V

LP8345-2.5, V

OUT = 3.5V, VIN = 10V

LP8345-3.3, V

OUT = 4V, VIN = 10V

LP8345-5.0, V

OUT = 6V, VIN = 10V

Output Noise

10Hz to 10kHz, R

L =1k

Ω,C

OUT = 10µF

250

µVrms

Note 1: Absolute Maximum ratings indicate limits beyond which damage may occur. Electrical specifications do not apply when operating the device outside of its

rated operating conditions.

Note 2: All voltages are with respect to the potential at the ground pin.

Note 3: Maximum Power dissipation for the device is calculated using the following equations:

where TJ(MAX) is the maximum junction temperature, TA is the ambient temperature, and θJA is the junction-to-ambient thermal resistance. The value of the θJA for

the LLP package is specifically dependant on the PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance and

power dissipation for the LLP package, refer to Application Note AN-1187.

Note 4: Typical Values represent the most likely parametric norm.

Note 5: All limits are guaranteed by testing or statistical analysis.

Note 6: Human body model 1.5k

Ω in series with 100pF.

Note 7: Condition does not apply to input voltages below 2.7V since this is the minimum input operating voltage.

Note 8: Dropout voltage is measured by reducing VIN until VO drops 100mV from its normal value.

LP8345 数据表(PDF) 6 Page - National Semiconductor (TI)

LP8345 数据表(HTML) 6 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13

数据表下载