Rainbow-electronics MAX17083 Manual do Utilizador descarregar pdf (Página 3)

MAX17083

Low-Voltage, Internal Switch,

Step-Down Regulator

_______________________________________________________________________________________ 3

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

FB Load Regulation SET = GND -4 mV/A

FB Line Regulation

(Slope Compensation)

V

SET = GND, 0 to 100% duty cycle,

= 4.5V to 5.5V

10 15 20 mV

FB Input Current I

SET = GND, T

= +25°C -100 -5 +100 nA

High-side n-channel R

32 50

Internal MOSFET On-Resistance

(Note 3)

Low-side n-channel R

17 30

m

Internal BST On-Resistance 2 

LX Peak Current Limit 5 6 8 A

LX Idle Mode™ Trip Level 1.5 A

LX Zero-Crossing Trip Level 100 mA

Soft-Start Ramp Time T

1939/

Soft-Start Fault Blanking Time T

SSLT

3232/

POK Upper Trip Threshold and

Overvoltage Fault Threshold

Rising edge, 50mV hysteresis 9 12 14 %

POK Lower Trip Threshold Falling edge, 50mV hysteresis -14 -12 -9 %

POK Propagation Delay Time t

POK

FB forced 50mV beyond POK trip threshold 5 μs

Overvoltage Fault Latch

Delay Time

FB forced 50mV above POK upper trip

threshold

5 μs

Undervoltage Fault Latch

Delay Time

FB forced 50mV below POK lower trip

threshold, TUV

1534/

POK Output Low Voltage I

SINK

= 3mA 0.4 V

POK Leakage Current I

POK

SET = GND, FB = 1V (POK high impedance),

POK forced to 5.5V, T

= +25°C

1 μA

Thermal-Shutdown Threshold T

SHDN

Hysteresis = 15°C +160 °C

LOGIC IN PUTS

EN Input High Threshold Rising, hysteresis = 220mV (typ) 1.0 1.4 1.6 V

EN Input Bias Current T

= +25°C 0.1 1 μA

0.5

Open 3 3.2

REF 1.2 2.2

FREQ and SET Input Voltage

Levels

GND 0.5

FREQ and SET Input Bias

Currents

= +25°C -2 +0.1 +2 μA

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V

= V

FREQ

= V

= 5V, I

REF

= no load, T

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

= +25°C.)

Idle Mode is a trademark of Maxim Integrated Products, Inc.

1 2 3 4 5 6 7 8 ... 14 15

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