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TPS72116DBVT

更新时间： 2024-02-02 14:13:15

品牌	Logo	应用领域
德州仪器 - TI		稳压器输入元件
页数	文件大小	规格书
14页	202K
描述
LOW INPUT VOLTAGE, CAP FREE 150-mA LOW-DROPOUT LINEAR REGULATORS

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TPS72116DBVT 数据手册

TPS72101, TPS72115

TPS72116, TPS72118

www.ti.com

SLVS352B – DECEMBER 2001 – REVISED MAY 2002

3.3 V

1.5 V

1.8 V – 3 V

BoostConverter

DSP or

Controller

1.8 V

TPS72115

CORE

Two AAA

Batteries

Figure 17. Dual Supply Application Circuit

EXTERNAL CAPACITOR REQUIREMENTS

A0.1-µFceramicbypasscapacitorisrequiredonboththeinputandoutputforstability. Largercapacitorsimprovetransient

response, noise rejection, and ripple rejection. A higher value electrolytic input capacitor may be necessary if large, fast

risetimeloadtransientareanticipated, and/orthereissignificantinputresistancefromthedevicetotheinputpowersupply.

POWER DISSIPATION AND JUNCTION TEMPERATURE

Specified regulator operation is assured to a junction temperature of 125°C; the maximum junction temperature allowable

without damaging the device is 150°C. This restriction limits the power dissipation the regulator can handle in any given

application. To ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation,

, and the actual dissipation, P , which must be less than or equal to P

D(max)

The maximum-power-dissipation limit is determined using the following equation:

T max * T

D(max)

qJA

Where:

T max is the maximum allowable junction temperature.

table.

is the thermal resistance junction-to-ambient for the package, see the power dissipation rating

θJA

T is the ambient temperature.

The regulator dissipation is calculated using:

₊ǒ_VI_* V

Power dissipation resulting from quiescent current is negligible.

1...5 6 789 10 11...14

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