PWM CONTROL 3A STEP-DOWN CONVERTER

2007-6-6

2/7

FSP3131

ABSOLUTE MAXIMUM RATINGS

(NOTE)

Parameter

Value

Unit

V

V

V

V

Internally limited

mW

-20 to +125

°C

-40 to +150

°C

Note: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions

for long periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

Parameter

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Input Voltage

3.6

23

V

Feedback Voltage

0.784

0.8

0.816

V

Feedback Bias Current

0.1

0.5

µA

Switch Current

3.5

A

Current Consumption During

Power Off

10

µA

Line Regulation

Δ

1

2

%

Load Regulation

Δ

0.2

0.5

%

Oscillation Frequency

fosc

Measure waveform at SW pin

240

300

360

KHz

Frequency of Current Limit or

Short Circuit Protect

fosc1

Measure waveform at SW pin

10

KHz

Evaluate oscillation at SW pin

2.0

Enable Pin Input Voltage

Evaluate oscillation stop at

SW pin

0.8

V

20

Enable Pin Input Leakage

Current

-10

µA

OCSET Pin Bias Current

75

90

105

µA

Soft-Start Time

0.3

2

5

ms

110

150

Internal MOSFET Rdson

70

100

mΩ

Efficiency

EFFI

91

%

Thermal Resistance

Junction to Ambient

65

°C/W