CAT3636

Doc. No. 5020 Rev. C

2

© 2007 Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

ABSOLUTE MAXIMUM RATINGS

Parameter

Rating

Unit

VIN, LEDx, C1±, C2± voltage

6

V

VOUT Voltage

7

V

EN/SET Voltage

VIN + 0.7V

V

Storage Temperature Range

-65 to +160

°C

Junction Temperature Range

(1)

-40 to +125

°C

Lead Temperature

300

°C

RECOMMENDED OPERATING CONDITIONS

Parameter

Range

Unit

VIN

2.5 to 5.5

V

Ambient Temperature Range

(1)

-40 to +85

°C

0 to 32

mA

Total Output Current

0 to 192

mA

Note

:

(1) Package thermal resistance is below 50

°C/W when mounted on FR4 board.

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

ELECTRICAL OPERATING CHARACTERISTICS

Symbol

Name

Conditions

Min

Typ

Max

Units

Quiescent Current

1x mode, VIN = 4.2V

1.33 x mode, VIN = 3.3V

1.5x mode, VIN = 2.8V

2x mode, VIN = 2.5V

1.5

2.8

3.7

3.8

mA

mA

mA

mA

Shutdown Current

1

µA

LED Current Accuracy

±3

%

LED Channel Matching

LED

LEDAVG

LED

I

I

I

−

±1

%

Output Resistance (open loop)

0.5

4.5

3.5

6

Ω

Ω

Ω

Ω

Charge Pump Frequency

1.33x and 2x mode

1.5x mode

0.6

0.8

0.8

1.1

1.1

1.4

MHz

MHz

Output short circuit Current Limit

80

mA

1x to 1.33x or 1.33x to 1.5x or

1.5x to 2x Transition Thresholds at any

LEDxx pin

150

mV

1.33x to 1x Transition Hysteresis

400

mV

Transition Filter Delay

500

µs

Input Current Limit

450

mA

EN/DIM Pin

•

Internal Pull-down Resistor

•

Logic High Level

•

Logic Low Level

1.3

100

0.4

kΩ

V

V

Thermal Shutdown

150

°C

Thermal Hysteresis

20

°C

Undervoltage lockout (UVLO) threshold

2

V