WIDE INPUT 3A STEP-DOWN CONVERTER

2007-1-4

2/10

FSP3128

ABSOLUTE MAXIMUM RATINGS

(NOTE)

Parameter

Value

Unit

IN to G

-0.3 to +34

V

EN to G

V

SW to G

V

BS to SW

-0.3 to +8

V

FB, COMP to G

-0.3 to +6

V

Continuous SW Current

Internally limited

A

46

°C/W

Maximum Power Dissipation

1.8

W

Operating Junction Temperature

-40 to 150

°C

Storage Temperature

-55 to 150

°C

Lead Temperature (Soldering, 10 sec)

300

°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

4.5

30

V

Feedback Voltage

1.198

1.222

1.246

V

High-Side Switch On Resistance

100

mΩ

Low-Side Switch On Resistance

10

Ω

SW Leakage

0

10

µA

Current Limit

3.5

5

A

COMP to Current Limit

Transconductance

3

A/V

Error Amplifier Transconductance

550

µA/V

Error Amplifier DC Gain

4000

V/V

Switching Frequency

340

400

460

KHz

Short Circuit Switching

Frequency

40

KHz

Maximum Duty Cycle

90

%

Minimum Duty Cycle

0

%

Enable Threshold Voltage

Hysteresis = 0.1V

0.7

1

1.3

V

Enable Pull Up Current

P

unconnected

2

µA

Supply Current in Shutdown

6

20

µA

IC Supply Current in Operation

0.85

2

mA

Thermal Shutdown Temperature

Hysteresis = 10°C

160

°C