3

Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters

specified in the Electrical Characteristics section is not recommended.

NOTES:

(1)

Tested according to JEDEC standard JESD22-A114-B.

(2)

Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.

Electrical Characteristics

Absolute Maximum Ratings

Supply Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +20.0

LX Voltage, Output Voltage (V) . . . . . . . . . . . . . -0.3 to +45

Current Sink Voltage (V) . . . . . . . . . . . . . . . . . . . . -0.3 to +45

Enable Voltage (V) . . . . . . . . . . . . . . . . . . . . . . -0.3 to (V

IN

+ 0.3)

Compensation Voltage (V) . . . . . . . . . . . . . . . . . . -0.3 to +2.0

Current Set Voltage (V) . . . . . . . . . . . . . . . . . . . . . . -0.3 to +2.0

SC4540

Recommended Operating Conditions

Supply Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8 to 12

Output Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 to 38

Ambient Temperature Range (°C) . . . . . . . . . . . . . -40 to +85

Thermal Information

Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +150

Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150

Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . +260

Parameter

Symbol

Conditions

Min

Typ

Max

Units

UVLO Threshold

V

UVLO

V

IN

rising

2.40

2.60

2.79

V

UVLO Hysteresis

V

UVLO-HYS

120

mV

Quiescent Supply Current

I

Q

Not switching

1.9

mA

Shutdown Supply Current

I

SHDN

EN tied to GND

0.1

3

μA

EN Logic High Voltage

V

IN

1.80

V

EN Logic Low Voltage

V

IL

0.8

V

EN Logic Input Current

I

IL,

I

IH

V

IN

= 12V, V

EN

= 0V to 1.8V

±0.01

±1

μA

V

IN

= 12V, V

EN

= 1.8V to 12V

±0.01

±5

Thermal Shutdown Temperature

T

SD

T

J

rising

155

°C

Thermal Shutdown Hysteresis

20

°C

Boost Converter Characteristics

Switching Frequency

f

SW

680

800

920

kHz

Maximum Duty Cycle

D

MAX

T

A

= 25°C

92

%

Minimum On-Time

t

ON(MIN)

100

ns

Unless otherwise noted: V

IN

= 7.2V, C

IN

= 2.2μF, C

OUT

= 1μF, C

COMP

= 47nF, R

COMP

= 1.27kΩ, R

ISET

= 5.76kΩ, L = 56μH, T

A

= -40 to 85ºC, typical values are at T

A

= 25ºC.