MAX1830 Ver la hoja de datos (PDF) - Maxim Integrated

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MAX1830

3A, 1MHz, Low-Voltage, Step-Down Regulators with Synchronous Rectification and Internal Switches

Maxim Integrated 

3A, 1MHz, Low-Voltage, Step-Down Regulators with

Synchronous Rectification and Internal Switches

ABSOLUTE MAXIMUM RATINGS

VCC, IN, SHDN to GND ............................................-0.3V to +6V

IN to VCC.............................................................................±0.3V

GND to PGND.....................................................................±0.3V

COMP, FB, TOFF, FBSEL, REF to GND .....-0.3V to (VCC + 0.3V)

LX Current (Note 1) ...............................................................5.1A

REF Short Circuit to GND Duration ............................Continuous

ESD Protection .....................................................................±2kV

Continuous Power Dissipation (TA = +70°C)

16-Pin QSOP (derate 14mW/°C above +70°C;

part mounted on 1in2 of 1oz copper) .............................1.12W

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature ......................................................+150°C

Lead Temperature (soldering, 10s) ................................ +300°C

Note 1: LX has internal clamp diodes to PGND and IN. Applications that forward bias the diode should take care not to exceed the IC’s

package power dissipation.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VIN = VCC = +3.3V, FBSEL = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

Input Voltage

Preset Output Voltage

SYMBOL

CONDITIONS

VIN, VCC

FBSEL = VCC

VOUT

VIN = +3V to +5.5V,

ILOAD = 0 to 3A,

VFB = VOUT

FBSEL =

unconnected

FBSEL = REF

(MAX1830)

FBSEL = GND

VIN = +3.7V to +5.5V,

ILOAD = 0 to 3A,

VFB = VOUT

FBSEL = REF

(MAX1831)

Adjustable Output Voltage Range

AC Load Regulation Error

DC Load Regulation Error

Dropout Voltage

Reference Voltage

Reference Load Regulation

Current-Limit Threshold

Maximum Output RMS Current

Idle Mode Current Threshold

PMOS Switch On-Resistance

NMOS Switch On-Resistance

Switching Frequency

No-Load Supply Current

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

FBSEL = GND

VDO

VREF

∆VREF

ILIMIT

IOUT(RMS)

IIM

VCC = VIN = +3V, ILOAD = 3A

IREF = -1µA to +10µA

(Note 4)

RON, P ILX = 0.5A

RON, N ILX = 0.5A

f

(Note 2)

IIN + ICC VFB = 1.2V

VIN = 4.5V

VIN = 3V

VIN = 4.5V

VIN = 3V

MIN

3.0

2.487

TYP

2.525

MAX

5.5

2.563

UNITS

V

1.492 1.515 1.538

1.791 1.818 1.845

V

1.084 1.100 1.117

3.283 3.333 3.383

VREF

1.089

4.0

0.2

2

0.4

150

1.100

0.5

4.8

0.6

45

50

55

55

325

VIN

330

1.111

2

5.4

3.4

1.0

90

110

95

100

1

750

V

%

%

mV

V

mV

A

A

A

mΩ

MHz

µA

2 _______________________________________________________________________________________

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