Symbol

Description

Conditions

Min

Typ

Max Units

Power Supply

Input Voltage Range

2.7

5.5

V

Maximum Output Voltage

24

V

2.7

V

UVLO Threshold

Hysteresis

150

mV

1.8

V

B1 = B2 = A1 = A2 = A3 = 1.2V,

Operating Current (No Switching)

300

µA

IN Pin Shutdown Current

EN = GND

1.0

µA

Maximum Continuous Output Current

100

mA

Current Sink Accuracy

18

20

22

mA

Current Matching Between Any

5

%

Sink Channels

A1 = A2 = A3 = B1 = B2 = 0.4V

Soft-Start Time

From Enable to Output

300

µs

OVP Threshold Voltage

1.1

1.2

1.3

V

OVP Threshold Hysteresis

100

mV

Low Side Switch On Resistance

80

m

Ω

Input Disconnect Switch

200

m

Ω

Current Set Ratio

760

A/A

Input Switch Current Limit

1.2

A

EN/SET Input

Enable Threshold Low

0.4

V

Enable Threshold High

1.4

V

EN/SET Low Time

0.3

75

µs

EN/SET High Time

75

µs

EN/SET Off Timeout

500

µs

EN/SET Latch Timeout

500

µs

EN/SET Input Leakage

-1

1

µA

Thermal Protection

140

°C

15

°C

AAT1235

High Efficiency White LED Drivers

for Backlight and Keypad

4

1235.2007.02.1.1

1. The AAT1235 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range is assured by

design, characterization, and correlation with statistical process controls.