MP3331-2A SYNCHRONOUS BOOST FLASH LED DRIVER WITH I

MP3331 Rev. 1.02

www.MonolithicPower.com

5

5/3/2016

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ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max

Units

Supply

Operating input voltage

2.7

5.5

V

Input UVLO threshold

Rising edge

2.5

V

Input UVLO hysteresis

150

mV

Standby current

10

μA

Operating quiescent current

mode

0.95

mA

Switching Regulator

Switching frequency

fs

Fs = 4MHz

3.6

4

4.4

MHz

Minimum on time

50

ns

NMOS on resistance

80

mΩ

PMOS on resistance

120

mΩ

Constant DC output voltage

5V DC mode

5

V

Code setting = 00, max duty

cycle

(5)

1.9

A

Inductor current limit

Code setting = 11, max duty

cycle

(5)

4.2

A

LED Driver

Flash mode,

value setting = 000000

0

mA

Flash current setting

Flash mode,

value setting = 001010

295

317

339

mA

Assist light/torch mode,

value setting = 000000

0

mA

Torch current setting

Assist light /torch mode,

value setting = 001010

295

317

339

mA

Current = 200mA

150

mV

Current source headroom

voltage

Current = 1500mA

(5)

250

mV

TUP_I = 000

8

μs

Current ramp-up step time

TUP_I =111

64

μs

Current ramp-down step

time

2

μs

Flash to TX current settling

time

TX from low to high, ILED from

1500mA to 31.7mA

5

μs

Digital Input

Input logic-low voltage

0.4

V

Input logic-high Voltage

1.2

V