High-Power Synchronous HBLED

Drivers with Rapid Current Pulsing

2

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

Stresses beyond 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 beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

IN to SGND.............................................................-0.3V to +30V

BST to SGND..........................................................-0.3V to +35V

BST to LX..................................................................-0.3V to +6V

SGND to PGND .....................................................-0.3V to +0.3V

28-Pin TQFN 5mm x 5mm (derate 34.5mW/°C

above +70°C) ............................................................2758mW

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Internal LDO on

7

28

Input-Voltage Range

4.75

5.50

V

Quiescent Supply Current

2.7

5.5

mA

LED CURRENT REGULATOR

(MAX16821A)

0.594

0.600

0.606

(MAX16821A)

0.594

0.600

0.606

(MAX16821B)

0.098

0.100

0.102

(MAX16821B)

0.098

0.100

0.102

(MAX16821C)

0.028

0.030

0.032

Differential Set Value

(MAX16821C)

0.028

0.030

0.032

V

Soft-Start Time

1024

Clock

Cycles

STARTUP/INTERNAL REGULATOR

UVLO

4.1

4.3

4.5

V

UVLO Hysteresis

200

mV

4.85

5.10

5.30

V

MOSFET DRIVER

Output Driver Impedance

1.1

3

Ω

Output Driver Source/Sink Current

4A

Nonoverlap Time

35

ns