RT4805B

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is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS4805B-01

April

2017

8

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Logic Level Low EN, VSEL,

nBYP, SCL, SDA

--

--

0.4

V

Output Voltage Accuracy

2

--

2

%

Minimum On Time

--

80

--

ns

Maximum Duty Cycle

40

--

--

%

Switching Frequency

2

2.5

3

MHz

Boost Valley Current Limit

3.5

4

4.5

A

Soft-Start Input Current Limit

LIN1

--

1000

--

mA

Soft-Start Input Current Limit

LIN2

--

2000

--

mA

Pass Through Mode Current

Limit

--

4

--

A

N-Channel Boost Switch

--

60

95

m



P-Channel Boost Switch

--

40

80

m



N-Channel Bypass Switch

--

40

60

m



Hot Die Trigger Threshold

--

100

--

Hot Die Release Threshold

--

90

--

Over-Temperature Protection

--

160

--

Over-Temperature Protection

Hysteresis

--

20

--

FAULT Restart Time

--

1

--

ms

Note 1.

Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are

stress ratings only, and 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 may affect

device reliability.

Note 2.

effective-thermal-conductivity four-layer test board on a JEDEC 51-7 thermal measurement standard.

Note 3. Devices are ESD sensitive. Handling precaution recommended.

Note 4. The device is not guaranteed to function outside its operating conditions.