LDS8621

© 2009 IXYS Corp.

2

Doc. No. 8621DS, Rev. N1.0

Characteristics subject to change without notice

ABSOLUTE MAXIMUM RATINGS

Parameter

Rating

Unit

Vin, LEDx, C1±, C2± voltage

6

V

Vout voltage

6.5

V

EN/SET voltage

Vin + 0.7V

V

Storage Temperature Range

-65 to +160

°C

Junction Temperature Range

-40 to +125

°C

Soldering Temperature

300

°C

RECOMMENDED OPERATING CONDITIONS

Parameter

Rating

Unit

Vin

2.7 to 5.5

V

Ambient Temperature Range

-40 to +85

°C

0 to 96

mA

Total Output Current

0 to 192

mA

Typical application circuit with external components is shown on page 1.

ELECTRICAL OPERATING CHARACTERISTICS

(Over recommended operating conditions unless specified otherwise) Vin = 3.6V, Cin = Cout = 1µF, C1 = C2 =

Name

Conditions

Min

Typ

Max

Units

1x mode

1.5

1.33 x mode

3.5

1.5x mode@ 3V

5.5

Quiescent Current

2x mode @ 2.7V

6.5

mA

Shutdown Current

1

µA

LED Current Accuracy

1.5 mA

≤Iled ≤96 mA

±3

%

LED Channel Matching

±3

%

1x mode

0.7

1.33x mode

3.5

1.5x mode

5.5

Output Resistance (open loop)

2x mode

6.5

Ω

1.33x and 2x mode

0.8

Charge Pump Frequency

1.5x mode

1.1

MHz

Output short circuit Current Limit

Vout < 0.5V

35

mA

Input Current Limit

Vout > 1V

450

mA

1x to 1.33x, 1.33x to 1.5x, or 1.5x to 2x

Transition Thresholds at any LED pin

50

mV

1.33x to 1x Mode Transition Hysteresis

600

mV

Transition Filter Delay

800

µs

Input Leakage

-1

1

µA

High

1.3

PWM1,

PWM2

Pins

Logic Level

Low

0.4

V

150

20

°C

Under Voltage Lockout (UVLO)

Threshold

2.1

V

Over Voltage Protection

6.2

V

PWM frequency

100

100000

Hz

PWM duty cycle

1

100

%