Rainbow-electronics MAX17062 Manual de usuario descargar pdf (Pagina 3)

MAX17062

TFT-LCD Step-Up DC-DC Converter

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ELECTRICAL CHARACTERISTICS (continued)

= V

SHDN

= 3V, FREQ = 3V, T

= 0°C to +85°C. Typical values are at T

= +25°C, unless otherwise noted.) (Note 1)

PARAMETER CONDITIONS MIN TYP MAX UNITS

CONTROL INPUTS

SHDN, FREQ Input Low Voltage V

= 2.6V to 5.5V

0.3 

SHDN, FREQ Input High Voltage V

= 2.6V to 5.5V

0.7 

SHDN, FREQ Input Hysteresis V

= 2.6V to 5.5V

0.1 

FREQ Pulldown Current 3 6 9 μA

SHDN = AGND, T

= +25°C -1 +1

SHDN Input Current

SHDN = AGND, T

= +85°C 0

μA

ELECTRICAL CHARACTERISTICS

= V

SHDN

= 3V, FREQ = 3V, T

= -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER CONDITIONS MIN TYP MAX UNITS

OUT

< 18V 2.6 5.5

Input Voltage Range

18V < V

OUT

< 20V 4.0 5.5

Output Voltage Range 20 V

IN Undervoltage-Lockout

Threshold

rising, typical hysteresis is 50mV 2.30 2.57 V

= 1.3V, not switching 0.6

IN Quiescent Current

= 1.0V, switching 2.5

ERROR AMPLIFIER

FB Regulation Voltage Level to produce V

COMP

= 1.24V 1.227 1.253 V

FB Input Bias Current V

= 1.24V 225 nA

FB Line Regulation Level to produce V

COMP

= 1.24V, V

= 2.6V to 5.5V 0.15 %/V

Transconductance 110 450 μS

Shutdown FB Input Voltage SHDN = AGND 0.05 0.15 V

OSCILLATOR

FREQ = AGND 450 830

Frequency

FREQ = IN 950 1500

kHz

Maximum Duty Cycle 87 95 %

n-CHANNEL MOSFET

Current Limit V

= 1V, 75% duty cycle, IN = 5V 3.9 5.3 A

IN = 5V 170

On-Resistance

IN = 3V 210

m

Current-Sense Transresistance IN = 5V 0.09 0.25 V/A

SOFT-START

Reset Switch Resistance 100 

Charge Current V

= 1.2V 2 6 μA

1 2 3 4 5 6 7 8 ... 13 14

MAX17062 1

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Rainbow-electronics MAX17062 Manual de usuario Pagina 3

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