LM3590 datasheet(3/9 Pages) NSC

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Absolute Maximum Ratings (Notes 1,

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

−0.3 to 13.0V Max

−0.3 to (V

IN+0.3V) w/

13.0V max

Maximum Junction Temperature

JMAX)

150˚C

Storge Temperature

−65˚C to +150˚C

Maximum Lead Temperature

(Soldering, 5 sec.)

260˚C

ESD Rating (Note 3)

Human Body Model

1.5kV

Machine Model

200V

Operating Conditions

Input Voltage Range

6.0V to 12.6V

EN Voltage Range

0V to V

Ambient Temperature (T

Range

(Note 4)

−40˚C to +85˚C

Junction Temperature (T

Range

−40˚C to +110˚C

Thermal Information

Junction-to-Ambient Thermal

Resistance,

SOT23-5 Package (

JA) (Note 5)

220˚C/W

Electrical Characteristics (Notes 2, 6)

Limits in standard typeface are for T

J = 25˚C and limits in boldface type apply over the full Operating Junction Temperature

Range (−40˚C

≤ T

≤ +110˚C). Unless otherwise specified, C

IN = 1 µF, VIN = 12.0V, VEN = 3.0V, RSET = 6.19k

Ω,V

IOUT =

10.8V.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

OUT

Output Current Capability

IN = 12V

7.5V

≤ V

IOUT

≤ 11.5V

(−5%)

(+5%)

IOUT = 10.8V

11.3V

≤ V

≤ 12.6V

(−5%)

(+5%)

SET = 8.35k

Ω

SET = 12.5k

Ω

Output Current Programming

125 ÷

SET

OUT ratio to ISET

100:1

Quiescent Supply Current

11.3V

≤ V

≤ 12.6V

SET = OPEN

OUT = OPEN

µA

Shutdown Supply Current

IN = 12.6V

EN =0V

0.1

µA

ISET

SET Reference Voltage

1.25

Minimum Current Source

Voltage Headroom (V

IN −

IOUT)(Note 7)

OUT = 95% nominal

300

Logic Input EN: High level

1.1

Logic Input EN: Low level

0.3

Enable Pin Input Current(Note 8)

µA

Turn-On Time

OUT = 90% of steady state

µs

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the

device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the

Electrical Characteristics table.

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

Note 3: The human-body model is a 100pF capacitor discharged through a 1.5k

Ω resistor into each pin. The machine model is a 220pF capacitor discharged

directly into each pin.

Note 4: Maximum ambient temperature (TA-MAX) is dependent on the maximum operating junction temperature (TJ-MAX-OP =110

oC), the maximum power

dissipation of the device in the application (PD-MAX), and the junction-to-ambient thermal resistance of the part/package in the application (θJA), as given by the

following equation: TA-MAX =TJ-MAX-OP -(θJA xPD-MAX). The ambient temperature operating rating is provided merely for convenience. This part may be operated

outside the listed TA rating, so long as the junction temperature of the device does not exceed the maximum operating rating of 110

oC.

Note 5: Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power dissipation exists,

special care must be paid to thermal dissipation issues. For more information on these topics, please refer to the Power Dissipation section of this datasheet.

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