RT9275 Просмотр технического описания (PDF) - Richtek Technology

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RT9275

Tiny Package, High Efficiency, Step-Up DC/DC Converter

Richtek Technology 

RT9275

Preliminary

Parameter

Symbol

Test Conditions

Min Typ Max Units

Soft Start time

Under Voltage Protection –

Threshold Voltage

TSS

VTH-UVP

3.0 6.0 12 ms

0.75 0.85 0.95 V

Thermal Shutdown

Thermal Shutdown Hysterises

TSD

ΔTSD

--

165

--

°C

--

10

--

°C

Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for

stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the

operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended

periods may remain possibility to affect device reliability.

Note 2. Devices are ESD sensitive. Handling precaution recommended.

Note 3. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of

JEDEC 51-3 thermal measurement standard.

Note 4. No Load Current is highly dependent on practical system design and component selection that cannot be covered by

production testing. Typical No Load Current is verified by typical application circuit with recommended components.

No Load Current performance is guaranteed by Switch Off Current and Continuous Switching Current.

Note 5. Current Limit is guaranteed by design at TA = 25°C.

Note 6. Load Regulation is not tested at production due to practical instrument limitation. Load Regulation performance is

dominantly dependent on DC loop gain and LX ON Resistance that are guaranteed by “Line Regulation” and “LX ON

Resistance” tests in production.

www.richtek.com

4

DS9275-06 March 2007

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