SC618

4

Parameter

Symbol

Conditions

Min

Typ

Max

Units

t

FLASH

3.3V < V

IN

< 4.2V

I

OUT

= 500mA, V

OUT

> 2.8V

500

ms

t

F-SU

t = 0 when FLASH goes high to

I

OUT

= 90% of final value

1ms

t

SAFE

FLASH high

0.90

1.25

s

Spotlight Mode

t

S-SU

V

IN

= 4.2V, V

OUT

= 3.2V; t = 0 when CTRL goes high

to I

OUT

= 90% of final value

1ms

Oscillator Frequency

f

OSC

Device enabled

250

kHz

Oscillator Frequency Accuracy

Δf

OSC

-15

15

%

Short-Circuit Output

Current Limit

I

SC

Steady State with VOUT shorted to GND

600

mA

Input Current Limit

I

LIMIT

2x mode, 3.3V < V

IN

< 4.2V

2.1

A

2x mode, V

IN

= 3.7V, V

OUT

= 3.7V, T

A

= 25°C

1.38

1.53

T

OT

Rising threshold

150

°C

T

OT -HYS

Hysteresis

10

Logic Input High Threshold

V

IH

FLASH, CTRL

1.5

V

Logic Input Low Threshold

V

IL

FLASH, CTRL

0.4

V

Logic Input High Current

I

IH

FLASH

1

20

35

μA

CTRL

2

40

70

Logic Input Low Current

I

IL

FLASH, CTRL

0.1

2.0

μA

ISET Ripple Voltage

V

ISET(P-P)

Spotlight mode — I

OUT

= 200mA

25

mV

FLASH mode — I

OUT

= 500mA

100

Electrical Characteristics (continued)

Notes:

1)

V

OUT

required by the typical LED at this current.

2)

Guaranteed by design - not tested in production.

3)

If conditions force 2x mode operation, this start-up time will increase by approximately 32ms due to the timer that is enabled to ensure 2x

mode is needed.