RT8004GQV Просмотр технического описания (PDF) - Richtek Technology

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производитель

RT8004GQV

3A, 4MHz, Synchronous Step-Down Regulator

Richtek Technology 

RT8004

Parameter

Switching Frequency

Symbol

Test Conditions

Min Typ Max Units

fOSC

ROSC = 309k

0.8

1

1.2 MHz

Switching Frequency Range 0.3

--

4 MHz

Sync Frequency Range

Switch On Resistance, High

Switch On Resistance, Low

Peak Current Limit

Undervoltage Lockout Threshold

RPFET

RNFET

ILIM

(Note 6)

ISW = 1A

ISW = 1A

VDD Rising

Hysteresis

0.3

--

4 MHz

45 75 110 mΩ

45 69 100 mΩ

4

5.2

7

A

2.25 2.52 2.7

V

-- 0.15 --

V

SW Leakage Current

EN/SS Leakage Current

Enable Threshold

VEN = 0V, VIN = 5.5V

VEN

--

--

1

μA

--

--

1

μA

0.65 -- 0.95 V

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. The device is not guaranteed to function outside its operating conditions.

Note 4. θJA is measured in the natural convection at TA = 25°C on 4-layers high effective thermal conductivity test board of

JEDEC 51-7 thermal measurement standard. The case point of θJC is on the expose pad for the QFN package.

Note 5. The specifications over the -40°C to 85°C operation ambient temperature range are assured by design, characterization

and correlation with statistical process controls.

Note 6. The external synchronous frequency must be equal to 1 to 1.3 times of the internal setting frequency. The switching

frequency reange is guaranteed by design but not production tested.

DS8004-03 September 2007

www.richtek.com

7

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