Rainbow-electronics MAX8575 Bedienungsanleitung PDF herunterladen (Seite 2)

MAX8570–MAX8575

High-Efficiency LCD Boost

with True Shutdown

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= V

SHDN

= 3.6V, SW floating, V

= 1.3V (MAX8570/MAX8571/MAX8574) or V

OUT

= 16V (MAX8572/MAX8573/MAX8575), T

-40°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.) (Note 1)

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.

, SHDN to GND..................................................-0.3V to +6V

SW to GND .................................................-0.3V to (V

+ 0.3V)

FB to GND (MAX8570/MAX8571/

MAX8574)...............................................-0.3V to (V

+ 0.3V)

OUT to GND (MAX8572/MAX8573/MAX8575) .......-0.3V to +30V

LX to GND ..............................................................-0.3V to +30V

, I

..............................................................................600mA

Continuous Power Dissipation (T

= +70°C)

SOT23-6 (derate 8.7 mW/°C above +70°C).............695.7 mW

Operating Temperature Range ...........................-40°C to +85°C

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

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

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

PARAMETER CONDITIONS

MIN TYP MAX

UNITS

Input Voltage Range

2.70 5.50

Undervoltage Lockout V

rising, 50mV typical hysteresis

2.33

2.5

2.65

Supply Current 25 35 µA

= +25°C

0.05

Shutdown Current SHDN = GND, V

= 5.5V

= -40°C to +85°C 0.05

µA

Line Regulation

Circuit of Figure 3, V

OUT

= 15V, I

LOAD

= 5mA,

= 2.7V to 5.5V

0.1 %/V

Load Regulation Circuit of Figure 3, V

OUT

= 15V, I

LOAD

= 0 to 5mA 0.1

%/mA

= 0°C to +85°C

1.216 1.226 1.236

FB Regulation Voltage

= -40°C to +85°C

1.2137 1.2383

FB Input Bias Current -50 -4

+50

= 0°C to +85°C

14.85

15.15

OUT Regulation Voltage

= -40°C to +85°C

14.813 15.187

OUT Input Bias Current V

OUT

= 15V 2.4 4.4 µA

LX Voltage Range 28 V

MAX8571/MAX8573

0.217 0.241 0.267

MAX8570/MAX8572

0.088 0.101 0.108

LX Switch Current Limit (Note 2)

MAX8574/MAX8575

0.425 0.484 0.540

MAX8571/MAX8573/MAX8574/MAX8575, I

= 100mA 0.9 1.5

LX On-Resistance

MAX8570/MAX8572, I

= 50mA 1.5 2.4

Ω

= +25°C

0.01

LX Leakage Current V

= 28V

= -40°C to +85°C 0.05

µA

Maximum LX On-Time 81114µs

> 1V or V

OUT

> 12.2V 0.8 1 1.2

Minimum LX Off-Time

= 0.25V or V

OUT

= 3.4V 4.0 5 6.0

µs

Current-Limit Propagation Delay

55 ns

SHDN Low Level (V

)2.7V ≤ V

≤ 5.5V 0.7 V

4.2V ≤ V

≤ 5.5V 1.5

SHDN High Level (V

)

2.7V ≤ V

< 4.2V 1.4

SHDN Leakage Current -1 +1 µA

1 2 3 4 5 6 7 8 9 10

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