CAT4201

Doc. No. MD-5025 Rev. D

2

© Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

Absolute Maximum Ratings

0F

(1)

Parameters

Ratings

Units

VBAT, SW, CTRL

-0.3 to +40

V

RSET

-0.3 to +5

V

Switch SW peak current

1

A

Storage Temperature Range

-65 to +160

°C

Junction Temperature Range

-40 to +150

°C

Lead Temperature

300

°C

Recommended Operating Conditions

Parameters

Ratings

Units

6.5 to 36

(2)

V

SW voltage

0 to 36

V

Ambient Temperature Range

-40 to +125

°C

LED Current

50 to 350

mA

Switching Frequency

50 to 1000

kHz

ELECTRICAL CHARACTERISTICS

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Operating Supply Current on

VBAT pin

0.4

1

mA

Idle Mode Supply Current on

VBAT pin

CTRL = GND

90

µA

RSET Pin Voltage

1.15

1.2

1.25

V

Programmed LED Current

R1 = 33kΩ

R1 = 10kΩ

R1 = 8.25kΩ

270

100

300

350

330

mA

CTRL Voltage for 100%

Brightness

2.6

3.1

V

CTRL Voltage to Enable

LEDs

LED enable voltage threshold

0.9

1.2

V

CTRL Voltage to Shutdown

LEDs

LED disable voltage threshold

0.4

0.9

V

CTRL pin input bias

40

200

80

µA

Switch “On” Resistance

0.9

1.5

Ω

Thermal Shutdown

150

ºC

Thermal Hysteresis

20

ºC

η

Efficiency

Typical Application Circuit

86

%

Notes:

(1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this

specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability.

(2) The VBAT pin voltage should be at least 3V greater than the total sum of the LED forward voltages in order to operate at nominal LED

current.

(3) During power-up, the slew rate of the input supply should be greater than 1µs for every 5V increase of VBAT.