TC1054-2.7VCT datasheet(11/12 Pages) TELCOM

부품명	TC1054-2.7VCT

상세설명	50mA CMOS LDO WITH SHUTDOWN AND ERROR OUTPUT

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TC1055

5

PRELIMINARY INFORMATION

TC1055-01 6/5/97

100mA CMOS LDO WITH SHUTDOWN

AND ERROR OUTPUT

In this example, the TC1055 dissipates a maximum of

only 60mW; far below the allowable limit of 318mW. In a

similar manner, Equation 1 and Equation 2 can be used to

calculate maximum current and/or input voltage limits. For

example, the maximum allowable VIN is found by substitut-

ing the maximum allowable power dissipation of 318mW

into Equation 1, from which VINMAX = 5.9V.

Layout Considerations

The primary path of heat conduction out of the package

is via the package leads. Therefore, layouts having a

ground plane, wide traces at the pads, and wide power

supply bus lines combine to lower

θJA and therefore in-

crease the maximum allowable power dissipation limit.

PD ≈ (VINMAX – VOUTMIN)ILOADMAX

Where:

PD = Worst case actual power dissipation

VIN

MAX = Maximum voltage on VIN

VOUT

MIN = Minimum regulator output voltage

ILOAD

MAX = Maximum output (load) current

Equation 1.

The maximum

allowable power dissipation (Equation 2)

is a function of the maximum ambient temperature (TAMAX),

the maximum allowable die temperature (125

°C) and the

thermal resistance from junction-to-air (

θJA). SOT-23A-5

package has a

θJA of approximately 220°C/Watt when

mounted on a single layer FR4 dielectric copper clad PC

board.

PD

MAX = (TJMAX – TJMAX)

θJA

Where all terms are previously defined.

Equation 2.

Equation 1 can be used in conjunction with Equation 2

to ensure regulator thermal operation is within limits. For

example:

Given:

VIN

MAX = 3.0V ±5%

VOUT

MIN = 2.7V ±0.5V

ILOAD = 40mA

TAMAX = 55°C

Find:

1. Actual power dissipation

2. Maximum allowable dissipation

Actual power dissipation:

PD ≈ (VINMAX – VOUTMIN)ILOADMAX

= [(3.0 x 1.05) – (2.7 x .995)]40 x 10–3

= 18.5mW

Maximum allowable power dissipation:

PDMAX = (TJ

MAX – TAMAX)

θJA

= (125 – 55)

220

= 318mW

유사한 부품 번호 - TC1054-2.7VCT

제조업체	부품명	데이터시트	상세설명
Microchip Technology	TC1054-2.7VCT	501Kb / 18P	50mA, 100mA and 150mA CMOS LDOs with Shutdown and ERROR Output 2002
	TC1054-2.7VCT713	389Kb / 18P	50 mA, 100 mA and 150 mA CMOS LDOs with Shutdown and ERROR Output 2007
	TC1054-2.7VCT713	456Kb / 20P	50 mA, 100 mA and 150 mA CMOS LDOs with Shutdown and ERROR Output 11/29/12

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TelCom Semiconductor, I...	TC1072	126Kb / 12P	50mA CMOS LDO WITH SHUTDOWN, ERROR OUTPUT AND VREF BYPASS
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Microchip Technology	TC1054	501Kb / 18P	50mA, 100mA and 150mA CMOS LDOs with Shutdown and ERROR Output 2002
TelCom Semiconductor, I...	TC1173	54Kb / 7P	300mA CMOS LDO with Shutdown, ERROR Output and Bypass
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	TC1072	727Kb / 22P	50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and VREF Bypass 2007
	TC1073	564Kb / 20P	50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and VREF Bypass 2002
	TC1072-25VCH713	658Kb / 22P	50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and VREF Bypass 12/08/06
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TC1054-2.7VCT 데이터시트(PDF) 11 Page - TelCom Semiconductor, Inc

TC1054-2.7VCT 데이터시트(HTML) 11 Page - TelCom Semiconductor, Inc

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