FR9886 Просмотр технического описания (PDF) - Unspecified

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FR9886

23V, 2.5A, 340Khz Synchronous Step-Down DC/DC Converter

Unspecified 

fitipower integrated technology lnc.

Electrical Characteristics

(VIN=12V, TA=25 , unless otherwise specified.)

Parameter

Symbol

Conditions

VIN Input Supply Voltage

VIN Quiescent Current

VIN Shutdown Supply Current

Feedback Voltage

Feedback OVP Threshold Voltage

High-Side MOSFET RDS(ON) (Note3)

Low-Side MOSFET RDS(ON) (Note3)

High-Side MOSFET Leakage Current

High-Side MOSFET Current Limit (Note3)

Low-Side MOSFET Current Limit (Note3)

Error Amplifier Voltage Gain (Note3)

VIN

IDDQ

ISD

VFB

VOVP

RDS(ON)

RDS(ON)

ILX(leak)

ILIMIT(HS)

ILIMIT(LS)

VSHDN=1.8V, VFB=1.0V

VSHDN=0V

4.5V≦VIN≦23V

VSHDN=0V, VLX=0V

Minimum Duty

From Drain to Source

Oscillation frequency

FOSC

Short Circuit Oscillation Frequency

FOSC(short) VFB=0V

Maximum Duty Cycle

DMAX

VFB=0.8V

Minimum On Time (Note3)

TMIN

Input UVLO Threshold

Under Voltage Lockout

Hysteresis

VUVLO(Vth) VIN Rising

Threshold VUVLO(HYS)

Soft-Start Current

ISS

VSS=0V

Soft-Start Period

TSS

CSS=0.1uF

SHDN Input Low Voltage

VSHDN (L)

SHDN Input High Voltage

VSHDN (H)

SHDN Input Current

ISHDN

VSHDN=2V

Thermal Shutdown Threshold (Note3)

TSD

Note3：Not production tested.

FR9886

85T

Min Typ Max Unit

4.5

23

V

2.5

mA

1

μA

0.9 0.925 0.95

V

1.5

V

120

mΩ

100

mΩ

10

uA

3.5 4.5

A

1.5

A

400

V/V

290 340 420 KHz

110

KHz

90

%

100

ns

4.3

V

250

mV

6

uA

15

ms

0.4

V

2

V

2

uA

170

℃

FR9886- 1.0-APR-2011

5

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