CAT3637

http://onsemi.com

3

Table 3. ELECTRICAL OPERATING CHARACTERISTICS

Symbol

Name

Conditions

Min

Typ

Max

Units

Quiescent Current

1.5

2.8

3.7

3.8

mA

Shutdown Current

1

mA

LED Current Accuracy

±3

%

LED Channel Matching

±1

%

Output Resistance (open loop)

0.5

3.5

3.5

6

W

Charge Pump Frequency

1.33x and 2x mode

1.5x mode

0.6

0.8

0.8

1.1

1.1

1.4

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 LEDx pin

150

mV

1.33x to 1x Transition Hysteresis

400

mV

Mode Transition Filter Delay

120

ms

Input Current Limit

450

mA

EN/DIM Pin

− Internal Pull−down Resistor

− Logic High Level

− Logic Low Level

1.3

100

0.4

kW

V

V

Thermal Shutdown

150

°C

Thermal Hysteresis

20

°C

Undervoltage lockout (UVLO) threshold

2

V

NOTE: Typical application circuit with external components is shown on page 2.