LM4040 datasheet(10/16 Pages) MICREL

10 / 16 page

LM4040/4041

Micrel

LM4040/4041

January 2000

+0.5

+0.4

+0.3

+0.2

+0.1

-0.1

-0.2

-0.3

-0.4

-0.5

-40

-22ppm/

°C

-51ppm/

°C

= 150µA

LM4041-1.2

12ppm/

°C

TEMPERATURE (

°C)

Temperature Drift for Different

Average Temperature Coefficient

-20

20406080 100

= 1µF

TANTALUM

Output Impedence

vs. Frequency

100

0.1

100

10k

100k

FREQUENCY (Hz)

= 25

° C

∆I

= 0.1I

LM4041-1.2

= 0

IR= 150µA

= 1mA

Voltage Impedance

1000

800

600

400

200

100

10k

100k

FREQUENCY (Hz)

= 200µA

TJ = 25°C

LM4041-1.2

LM4041-ADJ: V

OUT

= V

REF

Reverse Characteristics and

Minimum Operating Current

REVERSE VOLTAGE (V)

100

0.4

0.8

1.2

1.6

2.0

Typical

= 25

°C

LM4041-1.2

Reverse Characteristics and

Minimum Operating Current

REVERSE VOLTAGE (V)

100

0.4

0.8

1.2

1.6

2.0

Typical

= 25

°C

LM4041-1.2

RS 30k

VIN

1Hz rate

LM4041-1.2

Test Circuit

Note 1.

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

device is functional, but do not guarantee specific performance limits. For guaranteed specification and test conditions, see the Electrical

Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when

the device is not operated under the listed test conditions.

Note 2.

The maximum power dissipation must be derated at elevated temperatures and is dictated by T

JMAX (maximum junction temperature), θJA

(junction to ambient thermal resistance), and T

A (ambient temperature). The maximum allowable power dissipation at any temperature is

MAX = (TJMAX – TA)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM4040 and LM4041,

JMAX = 125°C, and the typical thermal resistance (θJA), when board mounted, is 326°C/W for the SOT-23 package.

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 200pF capacitor

discharged directly into each pin.

Note 4.

Typicals are at T

J = 25°C and represent most likely parametric norm.

Note 5.

Limits are 100% production tested at 25

°C. Limits over temperature are guaranteed through correlation using Statistical Quality Control (SQL)

methods.

Note 6.

The boldface (over temperature limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown

Voltage Tolerance

±[(∆V

R/∆T)(65°C)(VR)]. ∆VR/∆T is the VR temperature coefficient, 65°C is the temperature range from –40°C to the

reference point of 25

°C, and V

R is the reverse breakdown voltage. The total over temperature tolerance for the different grades follows:

A-grade:

±0.75% = ±0.1% ±100ppm/°C × 65°C

B-grade:

±0.85% = ±0.2% ±100ppm/°C × 65°C

C-grade:

±1.15% = ±0.5% ±100ppm/°C × 65°C

D-grade:

±1.98% = ±1.0% ±150ppm/°C × 65°C

Example: The A-grade LM4040-2.5 has an over temperature Reverse Breakdown Voltage tolerance of

±2.5 × 0.75% = ±19mV.

Note 7.

When V

OUT ≤ 1.6V, the LM4041-ADJ must operate at reduced IR. This is caused by the series resistance of the die attach between the die (–)

output and the package (–) output pin. See the Output Saturation curve in the Typical Performance Characteristics section.

Note 8.

Reference voltage and temperature coefficient will change with output voltage. See Typical Performance Characteristics curves.

LM4040 and LM4041 Electrical Characteristic Notes

LM4041 Typical Characteristics

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