FSP3122D33E datasheet(3/10 Pages) FOSLINK

Part #	FSP3122D33E

Description	150KHZ 3A PWM BUCK DC/DC CONVERTER

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Manufacturer	FOSLINK [FOSLINK SEMICONDUCTOR CO.,LTD]

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3 / 10 page

150KHZ 3A PWM BUCK DC/DC CONVERTER

2007-6-12

3/10

FSP3122

ELECTRICAL CHARACTERISTICS (ALL OUTPUT VOLTAGE VERSIONS)

Unless otherwise specified, VIN=12V for 3.3V,5V, adjustable version and VIN=24V for the 12V version. ILOAD=0.5A

Symbol

Paramrter

Conditions

Min.

Typ.

Max.

Unit

50

IB

Feedback bias current

VFB=1.3V(Adjustable

version only)

40

100

nA

127

150

173

FOSC

Oscillator frequency

110

173

KHz

VSAT

Saturation voltage

IOUT=3A

no outside circuit

VFB=0V force driver on

1.16

1.4

V

Max.Duty Cycle(ON)

VFB=0V force driver on

100

DC

Min.Duty Cycle(OFF)

VFB=12V force driver off

0

%

ICL

Current limit

Peak current

no outside circuit

VFB=0V force driver on

3.6

6.9

A

Output=0

no outside circuit

VFB=12V force driver off

50

µA

IL

Output=-1

Output

leakage

current

VIN=40V

5

30

mA

IQ

Quiescent Current

VFB=12V force driver off

7.8

10

mA

ISTBY

Standby Quiesient

Current

ON/OFF Pin=5V

VIN=40V

85

200

µA

VIL

Low(regultaor ON)

0.6

VIH

ON/OFF pin logic input

threshold voltage

High(regultaor OFF)

2.0

1.4

V

IH

ON/OFF pin logic input

current

VLOGIC=2.5V(OFF)

6

15

IL

ON/OFF pin input

current

VLOGIC=0.5V(ON)

0.02

5

µA

TO252-5L

10

TO220-5L

2.5

θJC

Thermal Resistence

TO263-5L

Junction

to case

3.5

/W

℃

TO252-5L

30

TO220-5L

28

θJA

Thermal Resistence

With copper area of

approximately 3 in

2

TO263-5L

Junction

to ambient

30

/W

℃

ELECTRICAL CHARACTERISTICS (CONTINUED)

Symbol

Parameter

Conditions

Typ.

Limit

Unit

VFB

Output Feedback

4.5V≤VIN≤40V

0.2A≤ILOAD≤3A

VOUT programmed for

3V

1.23

1.193/1.18

1.267/1.28

V

VMIN

VMAX

FSP3122-ADJ

η

Efficiency

VIN =12V,

ILOAD =3A

72

%

VOUT

Output voltage

5V≤VIN≤40V

0.2A≤ILOAD≤3A

3.3

3.168/3.135

3.432/3.465

V

VMIN

VMAX

FSP3122-3.3V

η

Efficiency

VIN =12V,

ILOAD =3A

72

%

VOUT

Output voltage

7V≤VIN≤40V

0.2A≤ILOAD≤3A

5

4.8/4.75

5.2/5.25

V

VMIN

VMAX

FSP3122-5V

η

Efficiency

VIN =12V,

ILOAD =3A

79

%

VOUT

Output voltage

15V≤VIN≤40V

0.2A≤ILOAD≤3A

12

11.52/11.4

12.48/12.6

V

VMIN

VMAX

FSP3122-12V

η

Efficiency

VIN =15V,

ILOAD =3A

90

%

Specifications with boldface type are for full operating temperature range, the other type are for TJ=25

ºC.

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