LD1085DT datasheet, PDF - EEWORLD Datasheet

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LD1085DT: DescriptionADJUSTABLE POSITIVE LDO REGULATOR, 1.3V DROPOUT, PSSO2, DPAK-3; CategoryPower/power management The power supply circuit; File Size600KB，20 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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LD1085DT Overview

ADJUSTABLE POSITIVE LDO REGULATOR, 1.3V DROPOUT, PSSO2, DPAK-3

LD1085DT Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	STMicroelectronics
Parts packaging code	TO-252
package instruction	TO-252,
Contacts	3
Reach Compliance Code	compliant
ECCN code	EAR99
Maximum drop-back voltage 1	1.3 V
JESD-30 code	R-PSSO-G2
JESD-609 code	e0
length	6.5 mm
Number of functions	1
Number of terminals	2
Maximum output current 1	3 A
Package body material	PLASTIC/EPOXY
encapsulated code	TO-252
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Certification status	Not Qualified
Regulator type	ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR
Maximum seat height	2.63 mm
surface mount	YES
Terminal surface	TIN LEAD
Terminal form	GULL WING
Terminal pitch	2.25 mm
Terminal location	SINGLE
Maximum time at peak reflow temperature	NOT SPECIFIED
width	6.1 mm

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LD1085

SERIES

3A LOW DROP POSITIVE VOLTAGE

REGULATOR ADJUSTABLE AND FIXED

TYPICAL DROPOUT 1.3V (AT 3A)

THREE TERMINAL ADJUSTABLE OR FIXED

OUTPUT VOLTAGE 1.2V, 1.5V, 1.8V, 2.5V,

2.85V, 3.3V, 3.6V, 5V, 8V, 9V, 12V.

GUARANTEED OUTPUT CURRENT UP TO

OUPUT TOLERANCE

±1%

AT 25°C AND

±2%

IN FULL TEMPERATURE RANGE

INTERNAL POWER AND THERMAL LIMIT

WIDE OPERATING TEMPERATURE RANGE

-40°C TO 125°C

PACKAGE AVAILABLE: TO-220, TO-220FP

PAK, D

PAK/A

PINOUT COMPATIBILITY WITH STANDARD

ADJUSTABLE VREG

TO-220

TO-220FP

PAK

PAK/A

DESCRIPTION

The LD1085 is a LOW DROP Voltage Regulator

able to provide up to 3A of Output Current.

Dropout is guaranteed at a maximum of 1.2V at

the maximum output current, decreasing at lower

loads. The LD1085 is pin to pin compatible with

the older 3-terminal adjustable regulators, but has

better performances in term of drop and output

tolerance.

A 2.85V output version is suitable for SCSI-2

active termination. Unlike PNP regulators, where

a part of the output current is wasted as quiescent

current, the LD1085 quiescent current flows into

the load, so increase efficiency. Only a 10µF

minimum capacitor is need for stability.

The device is supplied in TO-220, TO-220FP,

PAK and D

PAK/A. On chip trimming allows the

regulator to reach a very tight output voltage

tolerance, within ±1% at 25°C.

Figure 1: Schematic Diagram

February 2005

Rev. 13

1/20

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