5

IR3838MPbF

Rev 1.41

Recommended Operating Conditions

Symbol

Definition

Min

Max

Units

PVin

Input Voltage for power stage

1.5

16

Vin

Input Voltage for internal LDO *

7.0

16

Vcc/LDO_out

Supply Voltage *

4.5

6.5

Boot to SW

Supply Voltage

4.5

7.5

Output Voltage

0.6

0.9*Vin

V

Output Current

0

10

A

Fs

Switching Frequency

225

1650

kHz

Junction Temperature

-40

125

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

left unconnected.

PARAMETER

SYMBOL

TEST CONDITION

MIN

TYP

MAX

UNIT

POWER STAGE

Power Losses

Fs=600kHz, L=0.6uH, Note4

2

W

Top Switch

17.1

26

Bottom Switch

8.5

11

mΩ

Bootstrap Diode Forward

Voltage

I(Boot)= 30mA

180

260

470

mV

SW=0V, Enable=0V

6

SW leakage Current

Isw

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

14

µA

SUPPLY CURRENT

Enable low , No Switching,

400

µA

Enable high, Fs=500kHz,

Vin=12V

12

mA

INTERNAL REGULATOR (LDO)

Output Voltage

IntVcc

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

Cload=2.2uF

4.7

5.2

5.7

V

IntVcc Dropout

IntVcc_drop

Io=50mA, Cload=2.2uF

50

150

mV

Short Circuit Current

Ishort

70

mA

INTERNAL DIGITAL SOFT START

Soft Start Clock Frequency

Clk(SS)

Note4

168

200

254

kHz

Soft Start Ramp Rate

Ramp(SS)

0.2

mV/us

Electrical Specifications

Unless otherwise specified, these specification apply over, 7.0V<V