LM1084R datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > LM1084R

Preview

LM1084R: Description5A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed); File Size247KB，7 Pages; ManufacturerHTC Korea（TAEJIN Technology ）; Websitehttp://www.htckorea.co.kr/

Download Datasheet Compare View All

LM1084R Overview

5A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed)

Preview

Download Datasheet

View All

5A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed)

FEATURES

●

Output Current of 5A

●

Fast Transient Response

●

0.04% Line Regulation

●

0.2% Load Regulation

●

Internal Thermal and Current Limiting

●

Adjustable or Fixed Output Voltage(1.5V, 1.8V, 2.5V, 3.3V, 5.0V)

●

Surface Mount Package TO-263 3LD and TO-252 3L

●

100% Thermal Limit Burn-in

●

Low Dropout Voltage 1.5V at 5A Output Current

●

Moisture Sensitivity Level 3

TO-263 PKG

LM1084

TO-252 PKG

APPLICATIONS

●

High Efficiency Linear Regulators / Power Supply

●

High Efficiency "Green" Computer Systems

●

Constant Current Regulators

●

Portable Instrumentation

●

SMPS Post-Regulator

●

Adjustable Power Supplies

●

Powering VGA & Sound Card

1. ADJ / GND

2. OUTPUT

3. INPUT

* Heatsink surface connected to Pin 2.

ORDERING INFORMATION

Device

LM1084R-X.X

LM1084RS-X.X

Package

TO-263 3LD

TO-252 3LD

(X.X=VOUT=1.5V, 1.8V, 2.5V, 3.3V, 5.0V, ADJ)

DESCRIPTION

The LM1084 series of positive adjustable and fixed regulators are designed to provide 5A with high efficient.

All internal circuitry is designed to operate down to 1.3V input to output differential.

On-chip trimming adjusts the reference voltage to 1%.

It's low dropout voltage and fast transient response make it ideal for low voltage microprocessor applications.

Internal current and thermal limiting provides protection against any overload condition that would create

excessive junction temperature.

TEST & TYPICAL APPLICATION CIRCUIT

LM1084-3.3V

LM1084-ADJ

Note

(1) C1 needed if device is far away from filter capacitors.

(2) C2 minimum value required for stability.

REF

OUT

-V

ADJ

=1.25V(Typ.)

ADJ

=55㎂(Typ.)

OUT

= V

REF

x (1+RF2/RF1) + I

ADJ

x RF2

Nov. 2010 - Rev. 1.3.

HTC

-1-

5A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed)

APPLICATION INFORMATION

LM1084

The LM1084 series of adjustable and fixed regulators are easy to use and have all the protection features

expected in high performance voltage regulators : short circuit protection and thermal shut-down.

Pin compatible with older three terminal adjustable regulators, these devices offer the advantage of a lower

dropout voltage, more precies reference tolerance and improved reference stability with temperature.

STABILITY

The circuit design used in the LM1084 series requires the use of an output capacitor as part of the device

frequency compensation.

The addition of 150uF aluminum electrolytic or a 22uF solid tantalum on the output will ensure stability for

all operating conditions. When the adjustment terminal is bypassed with a capacitor to improve the ripple

rejection, the requirement for an output capacitor increases. The value of 22uF tantalum or 150uF aluminum

covers all cases of bypassing the adjustment terminal. Without bypassing the adjustment terminal smaller

capacitors can be used with equally good results.

To ensure good transient response with heavy load current changes capacitor values on the order of 100uF

are used in the output of many regulators. To further improve stability and transient response of these devices

larger values of output capacitor can be used.

PROTECTION DIODES

Unlike older regulators, the LM1084 family does not need any

protection diodies between the adjustment pin and the output and

from the output tu the input to prevent over-stressing the die.

LM1084

Internal resistors are limiting the internal current paths on the

LM1084 adjustment pin, therfore even with capacitors on the

adjustment pin no protection diode is needed to ensure device

safety under short-circuit conditions.

Diodes between the input and output are not usually needed.

Figure 10.

Microsecond surge currents of 50A to 100A can be handled by

the internal diode between the input and output pins of the device. In norminal operations it is difficult to get

those values of surge currents even with the use of large output capacitances. If high value output capacitors

are used, such as 1000uF to 5000uF and the input pin is instantaneously shorted to ground, damage can occur.

A diode from output to input is recommended, when a crowbar circuit at the input of the LM1084 is used.

Normal power supply cycling or even plugging and unplugging in the system will not generate current large

enough to do any damage.

The adjustment pin can be driven on a transient basis ±25V, with respect to the output without any device

degradation. As with any IC regulator, none the protection circuitry will be functional and the internal

transistors will break diwn if the maximum inout to output voltage differential is exceeded.

HTC

-5-

LM1084R Related Products

	LM1084R	LM1084	LM1084RS
Description	5A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed)	5A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed)	5A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed)

Recommended Resources

Infrared remote control circuit a

Small integrated second frequency converter

Thyristor controlled motor forward, reverse and inching circuit 2

DC motor drive circuit

Traffic light control circuit diagram

4V DC converter connected by CWl524A

How to view the length of the drawn line segment in real time using Cadence?: Currently, when drawing a serpentine line with cadence, you need to control the length. How can I see the length of the line I draw in real time?...; 天天1 PCB Design

Briefly talk about IAP: [size=3] [/size][code]#define PAGE_ADDR (0x08000000 + 63 * 1024)[/code] [code]uint8 MemReadByte(uint16 *data,uint16 num) { uint16 *temp_addr = (uint16 *)PAGE_ADDR; while(num --) { *data ++ = *temp_add...; ywlzh stm32/stm8

Reinstalling pb encountered strange problems: I encountered a strange problem when reinstalling pb. After reinstalling it many times, it still didn't solve the problem! When compiling nk, eboot generated 250 errors. I don't know what to do. I cha...; bg4xda Embedded System

GPRS server-side information sending problem: Have you ever encountered a situation where a client terminal uses GPRS (TCP) to connect to a server for communication, but for a period of time the client may enter a basement or elevator or a buildi...; userchen Embedded System

【Teaching Embedded Linux from Scratch】Episode 3: Lesson 3: Sharing Files with Virtual Machines 241381 1. Install VMware Tools, a tool for sharing virtual machines and Windows 241382 While Ubuntu is running, select the VM menu of the virtual machine....; babyking Embedded System

Pump pressure control system solution combining Siemens PLC and DTD110: The pipeline pressure monitoring and control system uses Siemens PLC and Xi'an Datai Electronics DTD110 series wireless telemetry RTU to achieve a hybrid wiring solution of wired and wireless.The DTD1...; VS_E_S_A_M RF/Wirelessly

Shortcut: S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 SA SB SC SD SE SF SG SH SI SJ SK SL SM SN SO SP SQ SR SS ST SU SV SW SX SY SZ T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 TA TB TC TD TE TF TG TH TI TJ TK TL TM TN TO TP TQ TR TS TT TU TV TW TX TY TZ U0 U1 U2 U3 U4 U6 U7 U8 UA UB UC UD UE UF UG UH UI UJ UK UL UM UN UP UQ UR US UT UU UV UW UX UZ V0 V1 V2 V3 V4 V5 V6 V7 V8 V9 VA VB VC VD VE VF VG VH VI VJ VK VL VM VN VO VP VQ VR VS VT VU VV VW VX VY VZ W0 W1 W2 W3 W4 W5 W6 W7 W8 W9 WA WB WC WD WE WF WG WH WI WJ WK WL WM WN WO WP WR WS WT WU WV WW WY X0 X1 X2 X3 X4 X5 X7 X8 X9 XA XB XC XD XE XF XG XH XK XL XM XN XO XP XQ XR XS XT XU XV XW XX XY XZ Y0 Y1 Y2 Y4 Y5 Y6 Y9 YA YB YC YD YE YF YG YH YK YL YM YN YP YQ YR YS YT YX Z0 Z1 Z2 Z3 Z4 Z5 Z6 Z8 ZA ZB ZC ZD ZE ZF ZG ZH ZJ ZL ZM ZN ZP ZR ZS ZT ZU ZV ZW ZX ZY

Popular Components