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TS4274 데이터시트 PDF




Taiwan Semiconductor에서 제조한 전자 부품 TS4274은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 TS4274 기능
기능 5V/400mA Fixed Voltage Ultra Low Dropout Voltage Regulator
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TS4274 데이터시트, 핀배열, 회로
TO-252
(DPAK)
Pin Definition:
1. Input
2. Ground
3. Output
TS4274
5V/400mA Fixed Voltage
Ultra Low Dropout Voltage Regulator
General Description
The TS4274 series of fixed-voltage monolithic micro-power voltage regulators is designed for a wide range of
applications. This device excellent choice of use in battery-power application. Furthermore, the quiescent current
increases on slightly at dropout, which prolongs battery life.
This series of fixed-voltage regulators features very low ground current (200uA Typ.) and very low drop output
voltage (600mV at 400mA). This includes a tight initial tolerance of 2% typ., and very low output temperature
coefficient.
Features
Ordering Information
Dropout voltage typically 0.6V @Io=400mA
Output current up to 400mA
Output voltage trimmed before assembly
Part No.
Package
Packing
TS4274CP50 RO TO-252 2.5Kpcs / 13” Reel
Load dump protection
Internal current limit
Thermal shutdown protection
Block Diagram
Typical Application Circuit
Absolute Maximum Rating
Parameter
Input Supply Voltage
Operation Input Supply Voltage
Power Dissipation
Junction Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Resistance Junction to Ambient
Symbol
VIN
VOPR
PD
TJ
TOPR
TSTG
RӨJA
Limit
-18 ~ +35
26
Internally Limited
+150
-40 ~ + 85
-65 ~ +150
150
Unit
V
V
W
oC
oC
oC
oC/W
1/6 Version: B13




TS4274 pdf, 반도체, 판매, 대치품
TS4274
5V/400mA Fixed Voltage
Ultra Low Dropout Voltage Regulator
Application Information (Continue)
Thermal Characteristics
A heatsink may be required depending on the maximum power dissipation and maximum ambient temperature of
the application. Under all possible operating conditions, the junction temperature must be within the range specified
under absolute maximum ratings. To determine if the heatsink is required, the power dissipated by the regulator, PD
must be calculated.
The below formula shows the voltages and currents for calculating the PD in the regulator:
IIN = IL / IG
PD = (VIN-VOUT) * IL + (VIN) * IG
Ex. PD = (3.3V-2.5V) * 0.5A + 3.3V * 11mA
= 400mW + 36mW
= 436mW
Remark: IL is output load current,
IG is ground current.
VIN is input voltage
VOUT is output voltage
The next parameter which must be calculated is the maximum allowable temperature rise.
TR(max) is calculated by the using to formula:
TR(max) = TJ(max) – TA(max)
Where: TJ(max) is the maximum allowable junction temperature, which is 125oC for commercial grade parts.
TA(max) is the maximum ambient temperature which will be encountered in the application.
Using the calculated values for TR(max) and PD, the maximum allowable value for the junction to ambient thermal
resistance, θJA, can now be found:
θJA = TR(max) / PD
IMPORTANT: if the maximum allowable value for is found to be 60oC /W for the TO-220 package, 80oC/W for
the TO-263 package, 150oC/W for the TO-252 package, or 170oC /W for the SOT-223 package, no heatsink is
needed since the package alone will dissipate enough heat to satisfy these requirements. If the calculated value for
θJA falls below these limits, a heatsink is required.
DPAK Thermal Resistance and Maximum Power Dissipation vs. P.C.B Copper Length
4/6 Version: B13

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부품번호상세설명 및 기능제조사
TS4274

5V/400mA Fixed Voltage Ultra Low Dropout Voltage Regulator

Taiwan Semiconductor
Taiwan Semiconductor

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