LM4128 datasheet(2/33 Pages) TI

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VIN

GND

N/C

VREF

LM4128, LM4128Q

SNVS475E – NOVEMBER 2006 – REVISED APRIL 2013

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Connection Diagram

5-Pin SOT-23 Package – Top View

See Package Number DBV (R-PDSO-G5)

PIN DESCRIPTIONS

Pin #

Name

Function

N/C

No connect pin, leave floating

GND

Ground

Enable pin

VIN

Input supply

VREF

Reference output

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)

Maximum Voltage on any input

-0.3 to 6V

Output short circuit duration

Indefinite

Power Dissipation (TA = 25°C)

(2)

350 mW

Storage Temperature Range

−65°C to 150°C

(soldering, 10sec)

260°C

Lead Temperature

Vapor Phase (60 sec)

215°C

Infrared (15sec)

220°C

ESD Susceptibility(3)

Human Body Model

2 kV

(1)

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

which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications, see Electrical

Characteristics.

(2)

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. θJ-A for SOT-23

package is 220°C/W, TJMAX = 125°C.

(3)

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

Ω resistor into each pin.

Operating Ratings

Maximum Input Supply Voltage

5.5V

Maximum Enable Input Voltage

VIN

Maximum Load Current

20mA

Junction Temperature Range (TJ)

−40°C to +125°C

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