2

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POWER MANAGEMENT

SC4503

Absolute Maximum Ratings

Exceeding the specifications below 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.

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

Electrical Characteristics

Absolute Maximum Ratings

Unless specified: V

Parameter

Symbol

Maximum

Units

Supply Voltage

V

IN

-0.3 to 20

V

SW Voltage

V

SW

-0.3 to 34

FB Voltages

V

FB

-0.3 to V

SHDN/SS Voltage

V

SHDN

-0.3 to V

Thermal Resistance Junction to Ambient (TSOT - 23)

θ

JA

191*

°C/W

Thermal Resistance Junction to Ambient (2X2 mm MLPD-W)

θ

JA

78*

°C/W

Maximum Junction Temperature

T

J

150

°C

Storage Temperature Range

T

STG

-65 to +150

Lead Temperature (Soldering)10 sec (TSOT - 23)

T

LEAD

260

Peak IR Reflow Temperature (2X2mm MLPD-W)

T

IR

260

ESD Rating (Human Body Model)

ESD

2000

V

Parameter

Conditions

Min

Typ

Max

Units

Under-Voltage Lockout Threshold

2.2

2.5

V

Maximum Operating Voltage

20

Feedback Voltage

1.225

1.250

1.275

Feedback Line Voltage Regulation

2.5V < V

0.02

%/V

FB Pin Bias Current

-25

-50

nA

Switching Frequency

1.15

1.30

1.55

MHz

Minimum Duty Cycle

0

%

Maximum Duty Cycle

86

90

Switch Current Limit

1.4

1.9

2.5

A

Switch Saturation Voltage

I

260

430

mV

Switch Leakage Current

V

0.01

1

µA

V

V

0.8

1.1

mA

V

V

0.01

1

µA