LM4121 datasheet(4/22 Pages) TI

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LM4121

SNVS073C – APRIL 2000 – REVISED APRIL 2013

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Electrical Characteristics

LM4121-1.250V (continued)

Unless otherwise specified VIN = 3.3V, ILOAD = 0, COUT = 0.01µF, TA = Tj = 25°C. Limits with standard typeface are for Tj =

25°C, and limits in boldface type apply over the

−40°C ≤ TA ≤ +85°C temperature range.

Symbol

Parameter

Conditions

Min (1)

Typ (2)

Max (1)

Units

ΔVOUT

Long Term Stability

1000 hrs. @ 25°C

100

ppm

(4)

Long term stability is change in VREF at 25°C measured continuously during 1000 hrs.

Electrical Characteristics

LM4121-ADJ

Unless otherwise specified VIN = 3.3V, VOUT = VREF, ILOAD = 0, COUT = 0.01µF, TA = Tj = 25°C. Limits with standard typeface

are for Tj = 25°C, and limits in boldface type apply over the −40°C ≤ TA ≤ +85°C temperature range.

Symbol

Parameter

Conditions

Min (1)

Typ (2)

Max (1)

Units

VOUT = VREF

Output Voltage Initial

Accuracy

1.216

±0.2

LM4121A-ADJ

LM4121-ADJ

±0.5

TCVREF/°C

Temperature

−40°C ≤ TA ≤ +125°C

ppm/°c

Coefficient

ΔVREF/ΔVIN

Line Regulation

1.8V

≤ VIN ≤ 12V

0.0007

0.009

%/V

0.012

0 mA

≤ ILOAD ≤ 1 mA

0.03

0.08

0.17

1 mA

≤ ILOAD ≤ 5 mA

0.01

0.04

ΔVOUT/ΔILOAD

Load Regulation

%/mA

0.1

−1 mA ≤ ILOAD ≤ 0 mA

0.04

0.12

−5 mA ≤ ILOAD ≤ −1 mA

0.01

Minimum Operating

ILOAD = 5 mA

1.5

1.8

Min-VIN

Voltage

Output Noise Voltage

0.1 Hz to 10 Hz

µVPP

(3)

10 Hz to 10 kHz

µVRMS

Supply Current

160

250

µA

275

ISS

Power-down Supply

VIN = 12V

Current

Enable = 0.4V

µA

Enable = 0.2V

IBIAS

Reference Pin Bias

(4)

Current

Logic High Input

1.6

1.5

Voltage

Logic Low Input

0.4

Voltage

0.2

Logic High Input

µA

Current

Logic Low Input

0.1

µA

Current

VOUT = 0

ISC

Short Circuit Current

VIN = 12V, VOUT = 0

(1)

Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical

Quality Control (SQC) methods. The limits are used to calculate TI's Averaging Outgoing Quality Level (AOQL).

(2)

Typical numbers are at 25°C and represent the most likely parametric norm.

(3)

Output noise for 1.25V option. Noise is proportional to VOUT.

(4)

Bias Current flows out of the Adjust pin.

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