SC643

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)

subscript n = 1, 2, 3, and 4.

(2)

Tested according to JEDEC standard JESD22-A114-B.

(3)

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 (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0

C1+, C2+ (V) . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (V

OUT

+ 0.3)

Pin Voltage — All Other Pins (V) . . . . . . . . . -0.3 to (V

IN

+ 0.3)

Recommended Operating Conditions

A

≤

+85

IN

≤

5.5

OUT

≤

5.25

Voltage difference between any two LEDs (V) . . . ΔV

F

≤ 1.0

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, T

A

= +25°C for Typ, -40ºC to +85°C for Min and Max, T

J(MAX)

= 125ºC, V

IN

= 3.7V, C

1

= C

2

= 2.2μF, C

IN

= C

OUT

= 4.7μF,

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Supply Specifications

Input Supply Voltage

V

IN

2.9

5.5

V

Shutdown Current

I

Q(OFF)

Shutdown, V

IN

= 4.2V

0.1

2.0

μA

Total Quiescent Current

I

Q

Sleep (all LDOs off ), SPIF = V

IN

(2)

90

135

μA

Sleep (all LDOs on), SPIF = V

IN

(2)

300

450

1x mode, I

OUT

= 2.5mA, I

BLn

2.5

mA

1x mode, I

OUT

= 125mA, I

BLn

= 25mA, 5 LEDs on

4.3

1.5x or 2x mode, I

OUT

= 125mA, I

BLn

= 25mA, 5 LEDs on

5.1

Charge Pump Electrical Specifications

Maximum Total Output Current

I

OUT(MAX)

Sum of all active LED currents,

V

OUT

≤ 4.2V

125

mA

Backlight Current Setting Range

I

BL

Nominal setting for BL1 – BL5

0

25

mA

Backlight Current Accuracy

I

BL_ACC

I

BLn

= 12mA

-8

±1.5

8

%

I

BL-BL

I

BLn

= 12mA

-3.5

±0.5

+3.5

%

1x Mode to 1.5x Mode

Falling Transition Voltage

V

TRANS1x

I

OUT

= 50mA, I

BLn

= 10mA, V

OUT

= 3.2V

3.22

V

1.5x Mode to 1x Mode Hysteresis

V

HYST1x

I

OUT

= 50mA, I

BLn

= 10mA, V

OUT

= 3.2V

250

mV

Electrical Characteristics