MAX15026_12 datasheet(2/23 Pages) MAXIM

2 / 23 page

Low-Cost, Small, 4.5V to 28V Wide Operating

Range, DC-DC Synchronous Buck Controller

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN = 12V, RRT = 27kΩ, RLIM = 30kΩ, CVCC = 4.7µF, CIN = 1µF, TA = -40°C to +85°C (MAX15026B/CETD+, MAX15026BETD/V+),

TA = TJ = -40°C to +125°C (MAX15026B/C/DATD+), unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)

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.

Note 1: Dissipation wattage values are based on still air with no heatsink. Actual maximum power dissipation is a function of heat

extraction technique and may be substantially higher. Package thermal resistances were obtained using the method

described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal consid-

erations, refer to www.maxim-ic.com/thermal-tutorial.

IN to GND ...............................................................-0.3V to +30V

BST to GND ............................................................-0.3V to +36V

LX to GND .................................................................-1V to +30V

EN to GND................................................................-0.3V to +6V

PGOOD to GND .....................................................-0.3V to +30V

BST to LX..................................................................-0.3V to +6V

DH to LX ...............................................….-0.3V to (VBST + 0.3V)

DRV to GND .............................................................-0.3V to +6V

DL to GND ................................................-0.3V to (VDRV + 0.3V)

VCC to GND...............-0.3V to the lower of +6V and (VIN + 0.3V)

All Other Pins to GND.................................-0.3V to (VCC + 0.3V)

VCC Short Circuit to GND ...........................................Continuous

DRV Input Current.............................................................600mA

PGOOD Sink Current ............................................................5mA

Continuous Power Dissipation (TA = +70°C) (Note 1)

14-Pin TDFN-EP, Multilayer Board

(derate 24.4mW/°C above +70°C) ..............................1951mW

Operating Temperature Range

MAX15026B/CETD+, MAX15026BETD/V+.......-40°C to +85°C

MAX15026B/C/DATD+ ...................................-40°C to +125°C

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

Storage Temperature Range .............................-60°C to +150°C

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

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

GENERAL

4.5

Input Voltage Range

VIN

VIN = VCC = VDRV

4.5

5.5

Quiescent Supply Current

VFB = 0.9V, no switching

1.75

2.75

Shutdown Supply Current

IIN_SBY

EN = GND

290

500

µA

Enable to Output Delay

480

µs

VCC High to Output Delay

EN = VCC

375

µs

VCC REGULATOR

6V < VIN < 28V, ILOAD = 25mA

Output Voltage

VCC

VIN = 12V, 1mA < ILOAD < 70mA

5.0

5.25

5.5

VCC Regulator Dropout

VIN = 4.5V, ILOAD = 70mA

0.28

VCC Short-Circuit Output Current

VIN = 5V

100

200

300

VCC Undervoltage Lockout

VCC_UVLO

VCC rising

3.8

4.0

4.2

VCC Undervoltage Lockout

Hysteresis

400

ERROR AMPLIFIER (FB, COMP)

FB Input Voltage Set-Point

VFB

585

591

597

FB Input Bias Current

IFB

VFB = 0.6V

-250

+250

FB to COMP Transconductance

ICOMP = ±20µA

600

1200

1800

µS

Amplifier Open-Loop Gain

Amplifier Unity-Gain Bandwidth

Capacitor from COMP to GND = 50pF

MHz

VCOMP-RAMP Minimum Voltage

160

COMP Source/Sink Current

ICOMP

VCOMP = 1.4V

110

µA

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