LM27313

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SNVS487D – DECEMBER 2006 – REVISED APRIL 2013

Operating Ratings

2.7V to 14V

30V

(1)

-40°C to 125°C

265°C/W

(1)

The maximum power dissipation which can be safely dissipated for any application is a function of the maximum junction temperature,

The maximum allowable power dissipation at any ambient temperature for designs using this device can be calculated using the

formula:

If power dissipation exceeds the maximum specified above, the internal thermal protection circuitry will protect the device by reducing

the output voltage as required to maintain a safe junction temperature.

Electrical Characteristics

limits in boldface type apply over the full operating temperature range (

25°C, and are provided for reference purposes only.

Symbol

Parameter

Conditions

Min

Typical

Max

Units

Input Voltage

2.7

14

V

Switch Current Limit

0.80

1.25

A

Switch ON Resistance

500

650

m

Ω

Device ON

1.5

Shutdown Threshold

V

Device OFF

0.50

0

Shutdown Pin Bias Current

µA

0

2

Feedback Pin Reference Voltage

1.205

1.230

1.255

V

Feedback Pin Bias Current

60

nA

2.1

3.0

mA

Quiescent Current

400

500

µA

0.024

1

FB Voltage Line Regulation

2.7V

0.02

%/V

Switching Frequency

1.15

1.6

1.90

MHz

Maximum Duty Cycle

80

88

%

Switch Leakage

1

µA

(1)

Switch current limit is dependent on duty cycle. Limits shown are for duty cycles

≤ 50%. See Figure 15 in Application Information –

MAXIMUM SWITCH CURRENT section.

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