MAX1744 Ver la hoja de datos (PDF) - Maxim Integrated

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componentes Descripción

Fabricante

MAX1744

High-Voltage / Step-Down DC-DC Controller in MAX

Maxim Integrated 

High-Voltage, Step-Down DC-DC

Controllers in µMAX

ELECTRICAL CHARACTERISTICS

(VIN = VSHDN = 5.5V to 36V, 3/5 = GND, ILOAD = 0, TA = -40°C to +125°C, unless otherwise noted.) (Note 1)

PARAMETER

Input Voltage Range

Supply Current into IN

Shutdown Supply Current

Output Voltage (MAX1744)

OUT Input Current (MAX1744)

FB Threshold Voltage (MAX1745)

FB Input Current (MAX1745)

VH Output Voltage with Respect to IN

VL Output Voltage

VL Undervoltage Lockout

CS Threshold Voltage

CS Input Current

SHDN, 3/5 Logic-High Threshold

SHDN, 3/5 Logic-Low Threshold

3/5 Input Current

SHDN Input Current

EXT Resistance

Minimum EXT Off-Time

Minimum EXT On-Time

Reference Voltage

REF Load Regulation

REF Line Regulation

CONDITIONS

VSHDN = VIN = 5.5V to 36V

SHDN = GND

3/5 = VL

3/5 = GND

3/5 = VL, VOUT = 5V

Falling edge, hysteresis = 8mV

VIN = 5.5V to 36V, IVH = 100μA to 20mA

VIN = 5.5V to 36V, IVL = 100μA to 2mA

VCS = VOUT = 2.5V to 18V

VCS = VOUT = VGND

VCS = VOUT = 2.5V to 18V

VCS = VOUT = VGND

VIN = 4.5V to 36V

VIN = 4.5V to 36V

SHDN = GND

3/5 = GND

VSHDN = 36V

IREF = 0

0 ≤ IREF ≤ 100μA

VIN = 4.5V to 36V, IREF = 0

MIN

4.5

4.85

3.20

1.22

-50

-6.0V

4.5

1.6

85

80

0

-25

2.4

1.5

0.7

1.22

Note 1: Specifications to -40°C are guaranteed by design, not production tested.

MAX

36

140

15

5.15

3.40

44

1.28

50

-4.3V

5.5

4.1

115

150

25

0

0.4

±1

±1

12

20

2.5

1.5

1.28

10

80

UNITS

V

μA

μA

V

μA

V

nA

V

V

V

mV

μA

V

V

μA

μA

Ω

μs

μs

V

mV

μV/V

4 _______________________________________________________________________________________

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