IR3846 查看數據表（PDF） - International Rectifier

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IR3846

Single-Input Voltage, Synchronous Buck Regulator 35A Highly Integrated SupIRBuck®

International Rectifier 

IR3846

PARAMETER

Supply Current

Vin Supply Current

(Standby)

Vin Supply Current (Dyn)

VCC Supply Current

(Standby)

VCC Supply Current (Dyn)

Under Voltage Lockout

VCC–Start–Threshold

VCC–Stop–Threshold

Enable–Start–Threshold

Enable–Stop–Threshold

Enable leakage current

Oscillator

Rt Voltage

Frequency Range

Ramp Amplitude

Ramp Offset

Min Pulse Width

Fixed Off Time

Max Duty Cycle

Sync Frequency Range

Sync Pulse Duration

Sync Level Threshold

SYMBOL

CONDITIONS

Iin(Standby)

Iin(Dyn)

Icc(Standby)

Icc(Dyn)

Vin=21V, Enable low,

No Switching

Vin=21V, Enable high,

Fs = 600kHz

Enable low, VCC=7V,

No Switching

Enable high, VCC=7V,

Fs = 600kHz

VCC_UVLO_Start

VCC_UVLO_Stop

Enable_UVLO_Start

Enable_UVLO_Stop

Ien

VCC Rising Trip Level

VCC Falling Trip Level

Supply ramping up

Supply ramping down

Enable=3.3V

FS

Vramp

Ramp (os)

Tmin (ctrl)

Dmax

High

Low

Rt=80.6k

Rt=39.2k

Rt=15k

PVin=6.8V, PVin(max)

slew rate=1V/us,

Note 4

PVin=12V, PVin(max)

slew rate=1V/us,

Note 4

PVin=16V, PVin(max)

slew rate=1V/us,

Note 4

Note 4

Note 4

Note 4

Fs=300kHz,

PVin=Vin=12V

Note 4

MIN

4.0

3.7

1.14

0.9

270

540

1350

86

270

100

3

TYP MAX

300 425

40

300 425

40

4.2 4.4

3.9 4.2

1.2 1.36

1.0 1.06

1

1

300

600

1500

330

660

1650

1.02

1.8

2.4

0.16

50

200 230

1650

200

0.6

UNIT

µA

mA

µA

mA

V

V

µA

V

kHz

Vp-p

V

ns

ns

%

kHz

ns

V

7 www.irf.com © 2013 International Rectifier

August 01, 2013

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