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UC62140 の電気的特性と機能

UC62140のメーカーはUnisonic Technologiesです、この部品の機能は「CMOS IC」です。


製品の詳細 ( Datasheet PDF )

部品番号 UC62140
部品説明 CMOS IC
メーカ Unisonic Technologies
ロゴ Unisonic Technologies ロゴ 




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UC62140 Datasheet, UC62140 PDF,ピン配置, 機能
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UNISONIC TECHNOLOGIES CO., LTD
UC621XX
BOOSTING VOLTAGE
REGULATORS
CMOS IC
DESCRIPTION
The UTC UC621XX is a positive output voltage regulator that can
supply up to 1A of output current using an external transistor. Low
power and high accuracy are achieved through CMOS process and
metal fuses trimming technologies.
The series consists of a high precision voltage reference, an error
correction circuit and a short-circuit protected output driver.
In stand-by mode, supply current can be dramatically cut. Since
the input-output voltage differential is small, loss control efficiency is
good.
The UTC UC621XX is particularly suited for use with battery
operated portable products, and products where supply current
regulation is required.
1
2
3
5
4
SOT-25
*Pb-free plating product number: UC621XXL
FEATURES
* Ultra Small Input-Output Voltage Differential
: 100mA of output current is available with a differential of 0.1V.
(Performance depends on the external transistor characteristics.)
* Maximum Output Current : 1A
* Output Voltage Range : 2V ~ 6V in 0.1V increments
* Highly Accurate : Set-up voltage ±2%
* Low Power Consumption : Typ.50µA (VOUT = 5.0V)
: Typ.0.2µA (Stand-by)
* Output Voltage Temperature Characteristics: Typ. ±100ppm/
* Input Stability : Typ.0.1%/V
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
Package
UC621xx-AF5-R
UC621xxL-AF5-R
SOT-25
Note: xx: Output Voltage, refer to Marking Information.
Packing
Tape Reel
UC621xxL-AF5-R
(1)Packing Type
(2)Package Type
(3)Lead Plating
(4)Output Voltage Code
(1) R: Tape Reel
(2) AF5: SOT-25
(3) L: Lead Free Plating, Blank: Pb/Sn
(4) xx: refer to Marking Information
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co., Ltd
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UC62140 pdf, ピン配列
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UC621XX
BLOCK DIAGRAM
VDD
EXT
CE
CMOS IC
Current
Limit
+
-
Voltage
Reference
VOUT
Vss
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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UC62140 電子部品, 半導体
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UC621XX
TYPICAL APPLICATION CIRCUIT
CMOS IC
+
VIN CIN
(Tantalum)
PNP Tr
RBE
VIN
RB
EXT
VOUT
CE
Vss
+ CL
(Tantalum)
RL Peripherals:
PNP Tr:2SA1213
RBE : 20K ~ 47K
R B: Please refer to Note 2 on the directions. for use
CCILN:4:170µµFF(T(Taanntatalulumm)1) 0µF minimum
OPERATIONAL EXPLANATION
Functional Description
Output voltage (VOUT) can be fixed by revising the external transistor's base current. This can be done by
comparing the detected voltage level and the set voltage power supply level.
DIRECTIONS FOR USE
Suggestions for External Comporients
1. PNP Transistor
The selection of a transistor should take into account output current, input voltage and power dissipation for each
specific application. It is recommended that a transistor that has a low output saturated voltage (VCE) and high hFE
characteristics be used.
2. RB Resistor
Although the IC unit is protected by a base current remitter circuit, it is recommended that a resistor (RB) be
connected between the transistor's base and the IC's EXT pin to protect the transistor.
Required output current can be calculated using the following equation although characteristic variations and
conditions of use should be carefully checked before use. The following equation also indicates the conditions
needed to obtain IOUT (max.) at VIN (min.). However, the larger the input current, the larger the output current (IOUT) that
can be obtained.
VIN(min) -1.2(V)
RB
0.7(V)
RBE
IOUT(max)
hFE
3. RBE Resistor, CL Capacitor
To prevent oscillation due to output load variation, use of a phase compensation capacitor CL is recommended.
Please use a Tantalum capacitor of at least 10µF. Please also use an RBE resistor of less than 47k.
An RBE resistor of between 20kand 47kis recommended for less power consumption.
4. Input Impedance
In order to control oscillation brought about as a result of impedance at the power supply line, connect a capacitor
of 10µF or more (Tantalum) between the external transistor's emitter and the ground pin.
Special Note
1. Protection Circuit
The built-in protect circuit is to protect the IC only. Therefore to prevent output shorts and overshoot current
through the transistor, use of a resistor RB or an overshoot current protection circuit is recommended. Care should
also be taken with the transistor's power dissipation.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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部品番号部品説明メーカ
UC62140

CMOS IC

Unisonic Technologies
Unisonic Technologies


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