IR3837MPBF 데이터 시트보기 (PDF) - International Rectifier

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IR3837MPBF

HIGHLY INTEGRATED 14A SINGLE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR

International Rectifier 

Recommended Operating Conditions

IR3837MPbF

Symbol

Definition

Min

PVin

Input Voltage for power stage

1.5

Vin

Input Voltage for internal LDO *

7.0

Vcc/LDO_out Supply Voltage *

4.5

Boot to SW Supply Voltage

4.5

Vo

Output Voltage

0.6

Io

Output Current

0

Fs

Switching Frequency

225

Tj

Junction Temperature

-40

Max

16

16

6.5

7.5

0.9*Vin

14

1650

125

Units

V

A

kHz

oC

* Vcc/LDO_out can be connected to an external regulated supply (≈ 5V). If so, the Vin input should be

left unconnected.

Electrical Specifications

Unless otherwise specified, these specification apply over, 7.0V<Vin=PVin<16V, Vref=0.6V

in 0oC<Tj< 125oC. Typical values are specified at Ta = 25oC.

PARAMETER

POWER STAGE

Power Losses

Top Switch

Bottom Switch

Bootstrap Diode Forward

Voltage

SW leakage Current

SYMBOL

TEST CONDITION

Ploss

Rds(on)_Top

Rds(on)_Bot

Vin=12V, Vo=1.8V, Io=14A,

Fs=600kHz, L=0.51uH, Note4

VBoot -Vsw =5.0V,

ID=14A,Tj=25C

Vcc=5.0V, ID=14A

I(Boot)= 30mA

Isw

SW=0V, Enable=0V

SW=0V, Enable=high, Vp=0V

MIN TYP MAX UNIT

3

W

12

16

mΩ

5.3

7

180 260 470

mV

6

14

µA

SUPPLY CURRENT

Vin Supply Current (Standby)

Vin Supply Current (Dyn)

Iin(Standby)

Iin(Dyn)

INTERNAL REGULATOR (LDO)

Output Voltage

IntVcc

IntVcc Dropout

Short Circuit Current

IntVcc_drop

Ishort

Enable low , No Switching,

Enable high, Fs=500kHz,

Vin=12V

Vin(min)=7.0V, Io=0-50mA,

Cload=2.2uF

Io=50mA, Cload=2.2uF

400

µA

17

mA

4.7

5.2

5.7

V

50

150

mV

70

mA

INTERNAL DIGITAL SOFT START

Soft Start Clock Frequency

Clk(SS)

Soft Start Ramp Rate

Ramp(SS)

Note4

168 200 254

kHz

0.2

mV/us

Rev 1.31

5

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