IR3840WM datasheet(5/34 Pages) IRF

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Rev 12.0

PD-97657

IR3840WMPbF

Recommended Operating Conditions

Parameter

Symbol

Test Condition

Min

TYP

MAX

Units

Power Loss

Ploss

Vcc=5V, Vin=12V, Vo=1.8V, Io=12A,

Fs=600kHz, L=0.6uH, Note4

2.5

MOSFET Rds(on)

Top Switch

Rds(on)_Top

VBoot -Vsw =5V, ID=14A, Tj=25

8.4

10.6

Bottom Switch

Rds(on)_Bot

Vcc=5V, ID=14A, Tj=25

5.7

6.9

Reference Voltage

Feedback Voltage

VFB

0.7

oC<Tj<125oC

-1.0

+1.0

Accuracy

-40

oC<Tj<125oC, Note3

-2.0

+2.0

Supply Current

Vcc Supply Current (Standby)

ICC(Standby)

SS=0V, No Switching, Enable low

500

Vcc Supply Current (Dyn)

ICC(Dyn)

SS=3V, Vcc=5V, Fs=500kHz

Enable high

Under Voltage Lockout

Vcc-Start-Threshold

VCC_UVLO_Start

Vcc Rising Trip Level

3.95

4.15

4.35

Vcc-Stop-Threshold

VCC_UVLO_Stop

Vcc Falling Trip Level

3.65

3.85

4.05

Enable-Start-Threshold

Enable_UVLO_Start

Supply ramping up

1.14

1.2

1.36

Enable-Stop-Threshold

Enable_UVLO_Stop

Supply ramping down

0.9

1.0

1.06

Enable leakage current

Ien

Enable=3.3V

Electrical Specifications

Unless otherwise specified, these specification apply over 4.5V< V

cc<5.5V, Vin=12V, 0

oC<T

j< 125

oC.

Typical values are specified at T

a = 25

oC.

Symbol

Definition

Min

Max

Units

Vin

Input Voltage

1.5

Vcc

Supply Voltage

4.5

5.5

Boot to SW

Supply Voltage

4.5

5.5

Output Voltage

0.7

0.9*Vin

Output Current

Switching Frequency

225

1650

kHz

Junction Temperature

-40

125

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