MAX8607 datasheet(3/10 Pages) MAXIM

3 / 10 page

1MHz PWM Boost Converter for 1.5A

White LED Camera Flash

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ELECTRICAL CHARACTERISTICS (continued)

(VEN1 = VEN2 = 5V, VOUT = VOUTS = 4V, COUT = 10µF, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless otherwise

noted.) (Note 1)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

COMP Input Resistance to GND

During shutdown or UVLO

140

250

Ω

LED TA Derating Function Threshold

Temperature when the LED current derating

function begins

+40

°C

LED TA Derating Function Slope

TA = +40°C to +85°C

-1.67

%/°C

EN1 and EN2 Logic-High Input Voltage

VOUTS = 2.7V to 5.5V

1.4

EN1 and EN2 Logic-Low Input Voltage

VOUTS = 2.7V to 5.5V

0.4

TA = +25°C

0.01

EN1 and EN2 Logic Input Bias Current

VEN_ = 5.5V

TA = +85°C

0.03

µA

LX n-Channel On-Resistance

ILX = 200mA

100

Ω

LX p-Channel On-Resistance

ILX = 200mA

100

200

Ω

TA = +25°C

0.01

LX Leakage

VLX = 5.5V

TA = +85°C

0.03

µA

Operating Frequency

0.8

1.0

1.2

MHz

Maximum Duty Cycle

Minimum Duty Cycle

Note 1: All devices are production tested at TA = +25°C. Specifications over temperature are guaranteed by design and characteri-

zation and not production tested.

Note 2: For temperatures below the thermal derating start point.

Typical Operating Characteristics

(Circuit of Figure 2, VIN = VEN1 = 3.6V, VEN2 = 0V, TA = +25°C, unless otherwise noted.)

FLASH-MODE BATTERY CURRENT

vs. INPUT VOLTAGE

500

1500

1000

3000

3500

2500

2000

4000

2.7

3.5

3.9

3.1

4.3

4.7

5.1

5.5

INPUT VOLTAGE (V)

RFLSH = 4.02k

Ω

RFLSH = 8.06k

Ω

RFLSH = 3.01k

Ω

RFLSH = 2k

Ω

MOVIE-MODE BATTERY CURRENT

vs. INPUT VOLTAGE

100

300

200

500

400

600

2.7

3.5

3.9

3.1

4.3

4.7

5.1

5.5

INPUT VOLTAGE (V)

RMOV = 2.00k

Ω

RMOV = 3.57k

Ω

RMOV = 6.49k

Ω

100

1000

BOOST CONVERTER EFFICIENCY

vs. LOAD CURRENT (DISCO MODE)

LOAD CURRENT (mA)

INCLUDES 83mA LED CURRENT

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