Rainbow-electronics MAX758A Manual de usuario descargar pdf (Pagina 3)

MAX1605

28V Internal Switch LCD Bias Supply

in SOT23

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS

= SHDN = 3.3V, T

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

ELECTRICAL CHARACTERISTICS (continued)

= SHDN = 3.3V, T

= 0°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LIM Input Low Level 2.4V ≤ V

≤ 5.5V 0.4 V

LIM Input Float Level

2.4V ≤ V

≤ 5.5V,

LIM

= ±0.5µA

( V

C C

/ 2) -

0.2V

( V

C C

/ 2)

+ 0.2V

LIM Input High Level 2.4V ≤ V

≤ 5.5V

- 0.4V

SHDN = V

, LIM = GND or V

-2 2

LIM Input Bias Current I

LIM

SHDN = GND 0.1 1

µA

PARAMETER SYMBOL CONDITIONS MIN MAX UNITS

Supply Voltage V

(Note 2) 2.4 5.5 V

Inductor Input Voltage Range V

(Note 2) 0.8 V

OUT

Undervoltage Lockout V

UVLO

falling, 50mV typical hysteresis 2.0 2.37 V

Quiescent Supply Current I

= 1.3V 35 µA

Shutdown Supply Current SHDN = GND 1 µA

Feedback Set Point V

1.215 1.285 V

Feedback Input Bias Current I

= 1.3V 100 nA

LX Voltage Range V

28 V

LIM = V

0.35 0.58

LIM = floating 0.18 0.30LX Switch Current Limit I

(

MAX

)

LIM = GND 0.08 0.17

LX On-Resistance R

= 3.3V, I

= 100mA 2 Ω

LX Leakage Current V

= 28V 2 µA

Maximum LX On-Time t

917µs

> 1.1V 0.75 1.25

Minimum LX Off-Time t

OFF

< 0.8V 3.8 6.0

µs

CONTROL INPUTS

2.4V ≤ V

≤ 5.5V

0.8 ×

SHDN Input Threshold

2.4V ≤ V

≤ 5.5V

0.2 ×

SHDN Input Bias Current I

SHDN

= 5.5V, V

SHDN

= 0 to 5.5V -1 1 µA

1 2 3 4 5 6 7 8 ... 11 12

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Rainbow-electronics MAX758A Manual de usuario Pagina 3

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