LX8819 データシートの表示（PDF） - Microsemi Corporation
部品番号
コンポーネント説明
一致するリスト
LX8819 Datasheet PDF : 9 Pages
| |||
LX8819
TM
®
Dual Channel 1A Low Dropout Regulator
DATA SHEET
ABSOLUTE MAXIMUM RATINGS
Input Voltage (VIN)......................................................................................13.5V
Load Current (Internally Limited) .....................................................................1A
Power Dissipation ......................................................................Internally Limited
Short-Circuit Protection .......................................................................... Indefinite
Operating Temperature Range ......................................................... 0°C to 150°C
Maximum Operating Junction Temperature ................................................ 150°C
Storage Temperature Range...........................................................-65°C to 150°C
Lead Temperature (Soldering 180 seconds) ................................................ 235°C
RoHS Peak Package Solder Reflow Temperature
(40 second maximum exposure) ..................................................... 260°C (+0, -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into, negative out of specified terminal.
THERMAL DATA
DF Plastic S-PAK 5-Pin
THERMAL RESISTANCE-JUNCTION TO CASE, θJC
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
5°C/W
30°C/W
DT Plastic D-PAK 5-Pin
THERMAL RESISTANCE-JUNCTION TO CASE, θJC
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
6°C/W
32°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the
above assume no ambient airflow.
θJA can vary from 25°C/W to > 40°C/W depending on mounting technique. (See Application Notes
Section: Thermal considerations)
PACKAGE PIN OUT
DF PACKAGE
(Top View)
RoHS 100% Matte Tin Lead Finish
TAB is GND
VOUT2
VOUT1
GND
ADJ
VIN
DT PACKAGE
(Top View)
Name
VIN
ADJ
GND
VOUT1
VOUT2
FUNCTIONAL PIN DESCRIPTION
Description
Positive unregulated supply input for the regulator – Bypass to GND with at least 2.2µF capacitance having low
ESR for good transient response.
Adjustable regulator feedback input – The output voltage can be set by two external resistors with the following
relationship:
VOUT1
=
VREF
⋅
⎜⎜⎝⎛1+
R1
R2
⎟⎟⎠⎞
+
IADJ
⋅ R1
where R1 is the resistor connected between VOUT1 and ADJ, and R2 is the resistor connected between ADJ and
GND.
Common terminal for ground reference – The input and output bypass capacitors should be connected to
this pin. In addition the tab on the S-Pak package and pin 3 are also used for heat sinking the device.
Adjustable regulator output (Regulator #1) – It is recommended to bypass to GND with at least 2.2µF. Size your
output capacitor to meet the transient loading requirement. If you have a very dynamic load, a lower ESR
capacitor will improve the response to these load steps.
Fixed regulator output (Regulator #2) – It is recommended to bypass to GND with at least 2.2µF. Size your
output capacitor to meet the transient loading requirement. For dynamic loads, a lower ESR capacitor will
improve the response to these load steps.
Copyright © 2003
Revision 1.0a, 4/29/2005
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Share Link: 