LP38859 datasheet(4/14 Pages) NSC

4 / 14 page

Electrical Characteristics Unless otherwise specified: V

IN =VOUT(NOM) + 1V, VBIAS = 3.0V, IOUT =10mA,

CIN =COUT = 10 µF, CBIAS = 1 µF, CSS = open. Limits in standard type are for TJ = 25˚C only; limits in boldface type apply

over the junction temperature (T

J) range of -40˚C to +125˚C. Minimum and Maximum limits are guaranteed through test,

design, or statistical correlation. Typical values represent the most likely parametric norm at T

J = 25˚C, and are provided for

reference purposes only. (Continued)

Symbol

Parameter

Conditions

MIN

TYP

MAX

Units

AC Parameters

PSRR

IN)

Ripple Rejection for V

IN Input

Voltage

IN =VOUT(NOM) + 1V,

f = 120 Hz

-80-

IN =VOUT(NOM) + 1V,

f=1kHz

-65-

PSRR

BIAS)

Ripple Rejection for V

BIAS

Voltage

BIAS =VOUT(NOM) + 3V,

f = 120 Hz

-58-

BIAS =VOUT(NOM) + 3V,

f=1kHz

-58-

Output Noise Density

f = 120 Hz

µV/

√Hz

Output Noise Voltage

OUT = 1.8V

BW = 10 Hz − 100 kHz

150

µV (rms)

BW = 300 Hz − 300 kHz

Thermal Parameters

Thermal Shutdown Junction

Temperature

160

˚C

SD(HYS)

Thermal Shutdown Hysteresis

J-A

Thermal Resistance, Junction to

Ambient(Note 3)

TO220-5

˚C/W

TO263-5

J-C

Thermal Resistance, Junction to

Case(Note 3)

TO220-5

TO263-5

Note 1: Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the

device is intended to be functional, but does not guarantee specific performance limits. For guaranteed specifications and conditions, see the Electrical

Characteristics.

Note 2: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin. Test method is per JESD22-A114. The HBM rating for device

pin 1 (SS) is ±1.5 kV.

Note 3: Device power dissipation must be de-rated based on device power dissipation (PD), ambient temperature (TA), and package junction to ambient thermal

resistance (

θJA). Additional heat-sinking may be required to ensure that the device junction temperature (TJ) does not exceed the maximum operating rating. See

the Application Information section for details.

Note 4: Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage.

Note 5: Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from no load to full load.

Note 6: Dropout voltage is defined the as input to output voltage differential (VIN -VOUT) where the input voltage is low enough to cause the output voltage to drop

no more than 2% from the nominal value.

LP38859 Datasheet(PDF) 4 Page - National Semiconductor (TI)

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