MAX1742 Просмотр технического описания (PDF) - Maxim Integrated

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MAX1742

1A/2.7A, 1MHz, Step-Down Regulators with Synchronous Rectification and Internal Switches

Maxim Integrated 

1A/2.7A, 1MHz, Step-Down Regulators with

Synchronous Rectification and Internal Switches

ELECTRICAL CHARACTERISTICS

(VIN = VCC = 3.3V, FBSEL = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3)

PARAMETER

Input Voltage

Preset Output Voltage

SYMBOL

VIN

VOUT

CONDITIONS

ILOAD = 0 to 1A

for MAX1742,

ILOAD = 0 to 2.5A

for MAX1842,

VFB = VOUT

VIN = 3V to 5.5V,

FBSEL = VCC

FBSEL = unconnected

FBSEL = REF

FBSEL = GND

Adjustable Output Voltage

Range

VIN = VCC = 3V to 5.5V, ILOAD = 0,

FBSEL = GND

Reference Voltage

PMOS Switch

On-Resistance

NMOS Switch

On-Resistance

Current-Limit Threshold

VREF

RON, P

ILX = 0.5A

RON, N

ILIMIT

ILX = 0.5A

MAX1742

MAX1842

VIN = 4.5V

VIN = 3V

VIN = 4.5V

VIN = 3V

Idle Mode Current Threshold

No-Load Supply Current

FB Input Bias Current

Off-Time Default Period

IIM

IIN + ICC

IFB

tOFF

MAX1742

MAX1842

VFB = 1.2V

VFB = 1.2V

RTOFF = 110kΩ

Note 2: Recommended operating frequency, not production tested.

Note 3: Specifications from 0°C to -40°C are guaranteed by design, not production tested.

MIN

3.0

2.475

1.485

1.782

1.078

VREF

1.078

1.2

2.9

0.05

0.2

0

0.85

MAX UNITS

5.5

V

2.575

1.545

V

1.854

1.122

VIN

V

1.122

V

200

250

mΩ

150

200

1.8

4.3

A

0.55

1.0

600

µA

300

nA

1.15

µs

4 _______________________________________________________________________________________

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