SC121

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.

(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.

Absolute Maximum Ratings

IN, OUT, LX, FB (V) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0

EN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (V

IN

+ 0.3)

Recommended Operating Conditions

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

V

IN

(V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7 to 4.5

V

OUT

(V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 to 5.0

Thermal Information

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

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

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

Unless otherwise noted V

IN

= 2.5V, C

IN

= C

OUT

= 22μF, L

1

= 4.7μH, T

A

= -40 to +85°C. Typical values are at T

A

= 25°C.

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Input Voltage Range

V

IN

0.7

4.5

V

Minimum Startup Voltage

V

IN-SU

I

OUT

< 1mA, T

A

= 0°C to 85°C

0.85

V

Shutdown Current

I

SHDN

T

A

= 25°C, V

EN

= 0V

0.1

1

μA

I

Q

I

OUT

= 0, V

EN

= V

IN

3.5

mA

Internal Oscillator Frequency

f

OSC

1.2

MHz

Maximum Duty Cycle

D

MAX

90

%

Minimum Duty Cycle

D

MIN

20

%

Output Voltage

V

OUT

V

FB

= 0V

3.3

V

Adjustable Output Voltage Range

V

OUT_RNG

For V

IN

such that D

MIN

< D < D

MAX

1.8

5.0

V

Regulation Feedback Reference Volt-

age Accuracy (Internal or External

Programming)

V

Reg-Ref

-1.5

1.5

%

FB Pin Input Current

I

FB

V

FB

= 1.2V

0.1

μA

Startup Time

t

SU

1ms

Electrical Characteristics