LM4121 datasheet(2/22 Pages) TI

2 / 22 page

LM4121

SNVS073C – APRIL 2000 – REVISED APRIL 2013

www.ti.com

Connection Diagrams

Figure 2. SOT23-5 Surface Mount Package

Figure 3. SOT23-5 Surface Mount Package

Table 1. SOT-23 Package Marking Information(1)

Field Information

First Field:

R = Reference

Second and third Field:

19 = 1.250V Voltage Option

20 = Adjustable

Fourth Field:

A-B = Initial Reference Voltage Tolerance

A = ±0.2%

B = ±0.5%

(1)

Only four fields of marking are possible on the SOT-23's small surface. This table gives the meaning of the four fields.

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Absolute Maximum Ratings

(1) (2)

Maximum Voltage on input or enable pins

−0.3V to 14V

Output Short-Circuit Duration

Indefinite

Power Dissipation (TA = 25°C)

(3):

DBV0005B package

− θJA

280°C/W

Power Dissipation

350 mW

ESD Susceptibility (4)

Human Body Model

2 kV

Machine Model

200V

Lead Temperature:

Soldering, (10 sec.)

+260°C

Vapor Phase (60 sec.)

+215°C

Infrared (15 sec.)

+220°C

(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 do not ensure specific performance limits. For ensured specifications and test

conditions, see Electrical Characteristics - LM4121-1.250V and Electrical Characteristics - LM4121-ADJ tables. The ensured

specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated

under the listed test conditions.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and

specifications.

(3)

Without PCB copper enhancements. The maximum power dissipation must be de-rated at elevated temperatures and is limited by TJMAX

(maximum junction temperature),

θJ-A (junction to ambient thermal resistance) and TA (ambient temperature). The maximum power

dissipation at any temperature is: PDissMAX = (TJMAX − TA)/θJ-A up to the value listed in the Absolute Maximum Ratings.

(4)

The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin. The machine model is a 200 pF

capacitor discharged directly into each pin.

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