LP2954IT datasheet(3/24 Pages) TI

3 / 24 page

LP2954, LP2954A

www.ti.com

SNVS096D – JUNE 1999 – REVISED MARCH 2013

Electrical Characteristics

Limits in standard typeface are for TJ = 25°C, bold typeface applies over the −40°C to +125°C temperature range. Limits

are specified by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless

otherwise noted: VIN = 6V, IL = 1 mA, CL = 2.2 μF.

2954AI

2954I

Symbol

Parameter

Conditions

Typical

Units

Min

Max

Min

Max

5.0

4.975

5.025

4.950

5.050

Output Voltage(1)

4.940

5.060

4.900

5.100

1 mA

≤ IL ≤ 250 mA

5.0

4.930

5.070

4.880

5.120

Output Voltage Temp.

See(2)

100

150

ppm/°C

Coefficient(1)

VIN = 6V to 30V

0.03

0.10

0.20

Line Regulation

0.20

0.40

IL = 1 to 250 mA

0.16

0.20

Load Regulation

IL = 0.1 to 1 mA

(3)

0.04

0.20

0.30

VIN–VO

IL = 1 mA

100

150

IL = 50 mA

240

300

420

Dropout Voltage(4)

IL = 100 mA

310

400

520

IL = 250 mA

470

600

800

IGND

IL = 1 mA

150

μA

180

IL = 50 mA

1.1

2.5

Ground Pin Current(5)

IL = 100 mA

4.5

IL = 250 mA

IGND

VIN = 4.5V

170

Ground Pin Current at

μA

Dropout(5)

120

210

ILIMIT

VOUT = 0V

380

500

Current Limit

530

Thermal Regulation

See(6)

0.05

0.2

%/W

CL = 2.2 μF

400

Output Noise Voltage

(10 Hz to 100 kHz)

CL = 33 μF

260

μV RMS

IL = 100 mA

CL=33μF

(7)

(1)

When used in dual-supply systems where the regulator load is returned to a negative supply, the output voltage must be diode-clamped

to ground.

(2)

Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.

(3)

Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested separately for load

regulation in the load ranges 0.1 mA–1 mA and 1 mA–250 mA. Changes in output voltage due to heating effects are covered by the

thermal regulation specification.

(4)

Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a

1V differential.

(5)

Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus the

ground pin current.

(6)

Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load

or line regulation effects. Specifications are for 200 mA load pulse at VIN = 20V (3W pulse) for T = 10 ms.

(7)

Connect a 0.1

μF capacitor from the output to the feedback pin.

Submit Documentation Feedback

Product Folder Links: LP2954 LP2954A

LP2954IT 数据表(PDF) 3 Page - Texas Instruments

LP2954IT 数据表(HTML) 3 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

数据表下载

链接网址

LP2954IT 数据表(PDF) 3 Page - Texas Instruments

LP2954IT 数据表(HTML) 3 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

数据表 下载

链接网址

数据表下载