MAX8655ETN(2007) Просмотр технического описания (PDF) - Maxim Integrated

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MAX8655ETN
(Rev.:2007)

Highly Integrated, 25A, Wide-Input, Internal MOSFET, Step-Down Regulator

Maxim Integrated 

Highly Integrated, 25A, Wide-Input,

Internal MOSFET, Step-Down Regulator

ABSOLUTE MAXIMUM RATINGS

PVIN, IN, EN to GND ..............................................-0.3V to +30V

BST to LXB ............................................................-0.3V to +7.5V

LX, LXB to GND............ (-2.5V for < 50ns transient) -1V to +30V

ILIM2, ILIM1, SYNCO, FSYNC, OVP,

SCOMP to GND .....................................-0.3V to (VAVL + 0.3V)

VL to PGND ...........................................................-0.3V to +7.5V

AVL, FB, POK, COMP, SS, MODE, REFIN to GND ..-0.3V to +6V

CS+, CS- to GND ....................................................-0.3V to +6V

PGND to GND to VLGND ......................................-0.3V to +0.3V

Operating Junction Temperature Range .......... -40°C to +125°C

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

θJC (thermal resistance from

junction to exposed pad) (Note 1) ...............................3.5°C/W

θJT (thermal resistance from junction to the top) ............3.9°C/W

ILX (RMS) .................................................................................27A

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

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

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer

board. For detailed information on package thermal considerations, see www.maxim-ic.com/thermal-tutorial.

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 = 12V, VBST - VLX = 6.5V, TA = -40°C to +85°C, circuit of Figure 4, typical values are at TA = +25°C, unless otherwise noted.) (Note 2)

PARAMETER

PVIN Operating Voltage Range

IN Operating Voltage Range

IN Quiescent Supply Current

Shutdown Supply Current

PVIN Shutdown Supply Current

AVL Undervoltage-Lockout

Threshold

CONDITIONS

VL = IN for VIN < 7V

VFB = 0.75V, no switching

EN = GND, VIN ≤ 28V

IIN + IVL + IAVL, EN = GND, VAVL = VVL = VIN = 5V

VPVIN = VLX = VBST

VAVL rising, 3% typical hysteresis

MIN TYP MAX UNITS

3

25

V

4.5

25.0

V

2

3

mA

10

µA

32

1

µA

3.90 4.15 4.40

V

Output-Voltage Adjust Range

VL Regulation Voltage

AVL Regulation Voltage

AVL Output Current

SOFT-START

SS Shutdown Resistance

SS Soft-Start Current

REFIN INPUT

Minimum output voltage is limited by minimum duty cycle 0.7

and external components

5.5

V

7V < VIN < 28V

5.5V < VVL < 7V, 1mA < ILOAD < 10mA

6.0

6.5

7.0

V

4.900 4.975 5.050

V

10

mA

From SS to GND, VEN = 0V

VREF = 0.625V

20

100

Ω

18

23

28

µA

REFIN Dual Mode™ Threshold

REFIN Input Bias Current

REFIN Input Voltage Range

VREFIN = 0.7V to 1.5V

VAVL -

1.0V

-250

0

VAVL

V

+250

nA

1.5

V

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

2 _______________________________________________________________________________________

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