DataSheet.jp

GQ2143 の電気的特性と機能

GQ2143のメーカーはGTMです、この部品の機能は「CMOS POSITIVE VOLTAGE REGULATOR」です。


製品の詳細 ( Datasheet PDF )

部品番号 GQ2143
部品説明 CMOS POSITIVE VOLTAGE REGULATOR
メーカ GTM
ロゴ GTM ロゴ 




このページの下部にプレビューとGQ2143ダウンロード(pdfファイル)リンクがあります。
Total 8 pages

No Preview Available !

GQ2143 Datasheet, GQ2143 PDF,ピン配置, 機能
www.DataSheet4U.com
ISSUED DATE :2005/01/24
REVISED DATE :
GQ2143
CMOS Po siti ve Vol tag e Regu l ato r
Description
The GQ2143 of positive, linear regulators feature low quiescent current (35 A typ.) with low dropout voltage,
making them ideal for battery applications.
This rugged device has both Thermal Shutdown, and Current Fold-back to prevent device failure under the
“Worst” of operating conditions.
The GQ2143 is stable with an output capacitance of 2.2 F or greater.
Features
Very Low Dropout Voltage
Guaranteed 300mA output
Over-Temperature Shutdown
Current Limiting
Short Circuit Current Fold-back
Highly Accurate± 1.5%
Adjustable output voltages
Power-saving Shutdown Mode
Low Temperature coefficient
Applications
Battery Powered Widgets
Instrumentation
Wireless Devices
PC Peripherals
Portable Electronics
Cordless Phones
Electronic Scales
Package Dimensions
Functional Block Diagram
Typical Application Circuit
REF.
A
B
C
D
E
F
Millimeter
Min. Max.
2.70 3.10
2.60 3.00
1.40 1.80
0.30 0.55
0 0.10
0° 10°
REF.
G
H
I
J
K
L
Dimensions
Millimeter
1.90 REF.
1.20 REF.
0.12 REF.
0.37 REF.
0.60 REF.
0.95 REF.
1/8

1 Page





GQ2143 pdf, ピン配列
ISSUED DATE :2005/01/24
REVISED DATE :
Ordering Information ( contd. )
Part Number
GQ2143-AD
Marking
3DAD2
XXXX
Output Voltage
Adjustable
Part Number
Marking
Output Voltage
Detailed Description
The GQ2143 of COMS regulators contain a PMOS pass transistor, voltage reference, error amplifier,
over-current protection, thermal shutdown and Power Good detection circuitry.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal
protection circuits. During normal operation, the error amplifier compares the output voltage to a precision
reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds
150 , or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120 .
The GQ2143 switches from voltage mode to current mode when the load exceeds the rated output current.
This prevents over-stress. The GQ2143 also incorporates current fold-back to reduce power dissipation when
the output is short circuited. This feature becomes active when the output drops below 0.8 volts, and reduces
the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts.
External Capacitors
The GQ2143 is stable with an output capacitance to ground of 2.2 F or greater. Ceramic capacitors have the
lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the
highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are
comparatively expensive. One option is to parallel a 0.1 F ceramic capacitor with a 10 F Aluminum Electrolytic.
The benefit is low ESR, high capacitance, and low overall cost.
A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should
be at least 0.1 F to have a beneficial effect.
All capacitors should be placed in close proximity to the pins. A “Quiet” ground termination is desirable. This
can be achieved with a “Star” connection.
Enable
The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shuts off, and all
internal circuits are powered down. In this state, the quiescent current is less than 1 A. This pin behaves much
like an electronic switch.
3/8


3Pages


GQ2143 電子部品, 半導体
ISSUED DATE :2005/01/24
REVISED DATE :
6/8

6 Page



ページ 合計 : 8 ページ
 
PDF
ダウンロード
[ GQ2143 データシート.PDF ]


データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


部品番号部品説明メーカ
GQ2141

CMOS POSITIVE VOLTAGE REGULATOR

GTM
GTM
GQ2143

CMOS POSITIVE VOLTAGE REGULATOR

GTM
GTM


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap