LV5803M

No.A1047-2/5

Recommended Operating Conditions at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

VIN pin voltage

VIN

4.5 to 18

V

BOOT pin voltage

VBT

-0.3 to 23

V

SW pin voltage

VSW

-0.4 to VIN

V

BOOT pin-SW pin maximum

voltage

VBS-SW

6.5

V

EN pin maximum voltage

VEN

18

V

FB, COMP, SS pin voltage

VFSO

6V

Electrical Characteristics at Ta

= 25°C, VIN = 12V, unless otherwise specified.

Ratings

Parameter

Symbol

Conditions

min

typ

max

Unit

IC current drain at standby

ICC1

EN=0V

80

µA

IC current drain in operation

ICC2

EN=open

2

mA

Efficiency

Effcy

VIN=12V, IOUT=1A, Vo=5V, Design target *1

90

%

Reference voltage

Vref

VIN=4.5V to 18V (±2%)

-2%

0.8

+2%

V

FB pin bias current

Iref

FB=0.8V application

10

100

nA

High-side ON resistance

RonH

BOOT=5V

0.20

Ω

Oscillation frequency

fOSC

265

330

395

kHz

Oscillation frequency during

short-circuit protection

fOSCS

26

33

40

kHz

EN high-threshold voltage

Venh

1.25

1.55

1.85

V

EN low-threshold voltage

Venl

0.95

1.25

1.55

V

EN pull-up current

Ien

EN=0V

45

µA

Maximum ON DUTY

D max

86

%

Current limit peak value 1

Ic1

VIN=12V, VOUT=5V, L=10µH

2.5

5.3

A

Current limit peak value 2

Ic2

VIN=12V, VOUT=3.3V, L=10µH

2.8

5.6

A

Current limit peak value 3

Ic3

VIN=12V, VOUT=1.2V, L=10µH

3.1

5.9

A

Thermal shutdown temperature

Ttsd

*Design guarantee *2

160

°C

Thermal shutdown temperature

hysteresis

Dtsd

*Design guarantee *2

40

°C

Soft start current

ISS

SS=0V

6

10

14

µA

*1: Reference value (not tested before shipment)

*2: Design guarantee (value guaranteed by design and not tested before shipment)