LD1985-4.0V datasheet, PDF - EEWORLD Datasheet

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LD1985-4.0V: DescriptionLINEAR INTEGRATED CIRCUIT; CategoryPower/power management The power supply circuit; File Size217KB，11 Pages; ManufacturerUNISONIC TECHNOLOGIES CO.,LTD; Websitehttp://www.unisonic.com.tw/

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LD1985-4.0V Overview

LINEAR INTEGRATED CIRCUIT

LD1985-4.0V Parametric

Parameter Name	Attribute value
package instruction	TSOP, TSOP5/6,.11,37
Reach Compliance Code	compli
ECCN code	EAR99
Adjustability	FIXED
Nominal dropback voltage 1	0.28 V
Maximum absolute input voltage	7 V
JESD-30 code	R-PDSO-G5
Maximum grid adjustment rate	0.0141%
Output times	1
Number of terminals	5
Working temperatureTJ-Max	125 °C
Operating temperatureTJ-Mi	-40 °C
Maximum output current 1	0.15 A
Nominal output voltage 1	4 V
Package body material	PLASTIC/EPOXY
encapsulated code	TSOP
Encapsulate equivalent code	TSOP5/6,.11,37
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE
Certification status	Not Qualified
Regulator type	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
surface mount	YES
technology	BIPOLAR
Terminal form	GULL WING
Terminal pitch	0.95 mm
Terminal location	DUAL
Maximum voltage tolerance	4%
Base Number Matches	1

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UTC LD1985

LINEAR INTEGRATED CIRCUIT

VERY LOW DROP AND LOW

NOISE VOLTAGE REGULATOR

LOW ESR CAP. COMPATIBLE,

WITH INHIBIT FUNCTION

DESCRIPTION

The UTC LD1985 is a 150mA fixed output voltage

regulator. The ultra low drop voltage and the low

quiescent current make them particularly suitable for low

noise, low power applications, and in battery powered

systems. In sleep mode quiescent current is less than

1μA when INHIBIT pin is pulled low. Shutdown Logic

Control Function is available on pin 3 (TTL compatible).

This means that when the device is used as local

regulator, it is possible to put a part of the board in

standby, decreasing the total power consumption.

An external capacitor, C

BYP

=10nF, connected between

bypass pin and GND reduce the noise to 30μVrms.

Typical application are in cellular phone, palmtop

laptop computer, personal digital assistant (PDA),

personal stereo, camcorder and camera.

SOT-25

1:V

4:Bypass

2:GND

5:V

OUT

3:INHIBIT

FEATURES

*VERY LOW DROPOUT VOLTAGE (280mV at 150mA

AND 7mV at 1mA LOAD)

*VERY LOW QUIESCENT CURRENT (2mA Typ. at

150mA LOAD AND 80μA at NO LOAD)

*OUTPUT CURRENT UP TO 150mA

*LOGIC CONTROLLED ELECTRONIC SHUTDOWN

*OUTPUT VOLTAGE OF 1.5, 1.8, 2.5, 2.8, 2.85, 3, 3.1,

3.2, 3.3, 3.5, 3.6, 3.8, 4, 4.7, 5V

*INTERNAL CURRENT AND THERMAL LIMIT

*AVAILABLE IN ± 1% TOLLERANCE (at 25℃, A

VERSION)

*LOW OUTPUT NOISE VOLTAGE 30μVrms

PIN DESCRIPTION

NO.

NAME

GND

FUNCTION

Input Port

Ground Pin

Control switch ON/OFF.

Inhibit is not internally

pulled-up; it cannot be left

INHIBIT floating. Disable the device

when connected to GND or

to a positive voltage less

than 0.18V

Bypass Pin: Capacitor to

be connected to GND in

Bypass order to improve the

thermal noise

performances.

OUT Output Port

UTC

UNISONIC TECHNOLOGIES CO., LTD.

QW-R102-021,B

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