Rainbow-electronics MAX15040 Manual do Utilizador descarregar pdf (Página 2)

MAX15040

High-Efficiency, 4A, Step-Down Regulator with

Integrated Switches in 2mm x 2mm Package

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= V

= 3.3V, T

= -40°C to +85°C. Typical values are at T

= +25°C, circuit of Figure 1, unless otherwise noted.) (Note 3)

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.

IN, V

, PWRGD to GND ......................................-0.3V to +4.5V

LX to GND....................-0.3V to the lower of 4.5V or (V

+ 0.3V)

LX Transient ..............(V

GND

- 1.5V, <50ns), (V

+ 1.5V, <50ns)

COMP, FB, REFIN/SS,

EN to GND..............-0.3V to the lower of 4.5V or (V

+ 0.3V)

LX RMS Current (Note 1) .........................................................5A

BST to LX..................................................................-0.3V to +4V

BST to GND ..............................................................-0.3V to +8V

Continuous Power Dissipation (T

= +70°C)

16-Bump (4 x 4 Array), 0.5mm Pitch WLP

(derated 12.5mW/°C above +70°C)...........................1000mW

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

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

Continuous Operating Temperature at

Full Load Current (Note 2) ...........................................+105°C

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

Soldering Temperature (reflow) .......................................+260°C

Note 1: LX has internal clamp diodes to GND and IN. Applications that forward bias these diodes should take care not to exceed

the package power dissipation limit of the device.

Note 2: Continuous operation at full current beyond +105°C may degrade product life.

PARAMETER CONDITIONS MIN TYP MAX UNITS

IN/V

IN and V

Voltage Range 2.40 3.60 V

= 2.5V 0.52 1

IN Supply Current No load, no switching

= 3.3V 0.8 1.5

= 2.5V 3.7 5.5

Supply Current No load, no switching

= 3.3V 4 6

= V

= 2.5V 12

Total Supply Current (IN + V

) No load

= V

= 3.3V 23

Total Shutdown Current from IN

and V

= V

BST

- V

= 3.6V, V

= 0V 0.1 2 µA

rising 2 2.2

Undervoltage Lockout

Threshold

LX starts/stops switching

falling 1.75 1.9

UVLO Deglitching 2µs

BST

= +25°C 2

BST Leakage Current

BST

= V

= 3.6V,

= 3.6V or 0V, V

= 0V

= +85°C 0.025

µA

PWM COMPARATOR

PWM Comparator Propagation

Delay

10mV overdrive 10 ns

COMP

COMP Clamp Voltage High V

= 2.4V to 3.6V 2.03 V

COMP Clamp Voltage Low V

= 2.4V to 3.6V 0.73 V

COMP Slew Rate 1.6 V/µs

PWM Ramp Valley V

= 2.4V to 3.6V 830 mV

PWM Ramp Amplitude 1V

COMP Shutdown Resistance From COMP to GND, V

= 0V 8 Ω

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

MAX15040 1

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