RT9164 View Datasheet(PDF) - Richtek Technology

Part Name

Description

Manufacturer

RT9164

1A Fixed and Adjustable Low Dropout Positive Voltage Regulators

Richtek Technology 

is only guaranteed to a maximum junction

temperature of +125°C. The power dissipation and

junction temperature for RT9164 in DPAK package

are given by

PD = (VIN - VOUT) × IOUT

TJUNCTION = TAMBIENT + (PD × θJA)

Note: TJUNCTION must not exceed 125°C

Current Limit Protection

RT9164 is protected against overload conditions.

Current protection is triggered at typically 1.6A.

Thermal Consideration

The RT9164 series contain thermal limiting circuitry

designed to protect itself from over-temperature

conditions. Even for normal load conditions,

maximum junction temperature ratings must not be

exceeded. As mention in thermal protection section,

we need to consider all sources of thermal resistance

between junction and ambient. It includes junction-to-

case, case-to-heat-sink interface, and heat sink

thermal resistance itself.

Junction-to-case thermal resistance is specified from

the IC junction to the bottom of the case directly

below the die. Proper mounting is required to ensure

the best possible thermal flow from this area of the

package to the heat sink. The case of all devices in

this series is electrically connected to the output.

Therefore, if the case of the device must be

electrically isolated, a thermally conductive spacer is

recommended.

RT9164

DS9164-08 May 2001

www.richtek-ic.com.tw

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