LP3855ES-ADJSLASHNOPB datasheet(4/22 Pages) TI

4 / 22 page

LP3855-ADJ

SNVS244F – SEPTEMBER 2003 – REVISED APRIL 2013

www.ti.com

ELECTRICAL CHARACTERISTICS — LP3855-ADJ

Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range.

Unless otherwise specified: VIN = VO(NOM) + 1V, IL = 10 mA, COUT = 10µF, VSD = 2V.

LP3855-ADJ(2)

Symbol

Parameter

Conditions

Typ (1)

Units

Min

Max

VOUT +1V ≤ VIN≤ 7V

1.198

1.234

VADJ

Adjust Pin Voltage

1.216

10 mA

≤ IL ≤ 1.5A

1.180

1.253

VOUT +1V ≤ VIN≤ 7V

IADJ

Adjust Pin Input Current

100

10 mA

≤ IL ≤ 1.5A

Output Voltage Line

0.02

ΔV OL

VOUT +1V ≤ VIN ≤ 7.0V

Regulation (3)

0.06

Output Voltage Load

0.06

ΔVO/ ΔIOUT

10 mA

≤ IL ≤ 1.5A

0.12

Regulation(3)

IL = 150 mA

Dropout Voltage,

DDPAK/TO-263 and TO-

310

220(4)

IL = 1.5A

240

420

VIN - VOUT

IL = 150 mA

Dropout Voltage,

SOT 223(4)(5)

320

IL = 1.5A

260

435

IL = 150 mA

Ground Pin Current In

IGND

Normal Operation Mode

IL = 1.5A

VSD ≤ 0.3V

0.01

Ground Pin Current In

IGND

µA

Shutdown Mode

-40°C

≤ TJ ≤ 85°C

IO(PK)

Peak Output Current

VO ≥ VO(NOM) - 4%

1.8

Short Circuit Protection

ISC

Short Circuit Current

3.2

Shutdown Input

VSDT Rising from 0.3V

1.3

until Output = ON

VSDT

Shutdown Threshold

VSDT Falling from 2.0V

1.3

0.3

until Output = OFF

TdOFF

Turn-off delay

IL = 1.5A

µs

TdON

Turn-on delay

IL = 1.5A

µs

ISD

SD Input Current

VSD = VIN

AC Parameters

VIN = VOUT + 1V, COUT = 10uF

VOUT = 3.3V, f = 120Hz

PSRR

Ripple Rejection

VIN = VOUT + 0.5V, COUT = 10uF

VOUT = 3.3V, f = 120Hz

ρn(l/f)

Output Noise Density

f = 120Hz

0.8

µV

BW = 10Hz – 100kHz, VOUT = 2.5V

150

Output Noise Voltage

µV (rms)

BW = 300Hz – 300kHz, VOUT = 2.5V

100

(1)

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

(2)

Limits are specified by testing, design, or statistical correlation.

(3)

Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage.

Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current.

(4)

Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value.

Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the drop-out voltage is

nothing but the input to output differential, since the minimum input voltage is 2.5V.

(5)

The SOT-223 package devices have slightly higher dropout due to increased bond wire resistance.

Submit Documentation Feedback

Product Folder Links: LP3855-ADJ

LP3855ES-ADJ/NOPB bảng dữ liệu(PDF) 4 Page - Texas Instruments

LP3855ES-ADJ/NOPB bảng dữ liệu(HTML) 4 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

bảng dữ liệu tải về

Link URL