MAX15046 datasheet(2/23 Pages) MAXIM

Part #	MAX15046

Description	40V, High-Performance, Synchronous Buck Controller

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Manufacturer	MAXIM [Maxim Integrated Products]

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40V, High-Performance, Synchronous

Buck Controller

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.

IN to GND..............................................................-0.3V to +45V

VCC to GND..................... -0.3V to lower of (VIN + 0.6V) and 6V

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

PGOOD to GND ....................................................-0.3V to +45V

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

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

BST to PGND .......................................................-0.3V to +50V

LX and CSP to PGND...............................................-1V to +45V

LX and CSP to PGND............................-2V (50ns max) to +45V

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

CSP to LX .............................................................-0.3V to +0.3V

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

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

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

PGOOD Maximum Sink Current.........................................20mA

Continuous Power Dissipation (TA = +70NC):

16-Pin QSOP (derate 9.6mW/NC above +70NC) .......771.5mW

16-Pin QSOP-EP (derate 22.7mW/NC above +70NC) 1818.2mW

Junction-to-Case Thermal Resistance (θJC) (Note 1)

16-Pin QSOP................................................................37NC/W

16-Pin QSOP-EP ............................................................6NC/W

Junction-to-Ambient Thermal Resistance (θJA) (Note 1)

16-Pin QSOP...........................................................103.7NC/W

16-Pin QSOP-EP ..........................................................44NC/W

Operating Temperature Range........................ -40NC to +125NC

Junction Temperature .....................................................+150NC

Storage Temperature Range............................ -65NC to +150NC

Lead Temperature (soldering, 10s) ................................+300NC

ELECTRICAL CHARACTERISTICS

(VIN = 24V, VEN = 5V, VGND = VPGND = 0V, CIN = 1FF, CVCC = 4.7FF, RRT = 49.9kI, TA = TJ = -40NC to +125NC, unless otherwise

noted. Typical values are at TA = +25NC.) (Note 2)

ABSOLUTE MAXIMUM RATINGS

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

er board. For detailed information on package thermal considerations, refer to http://www.maxim-ic.com/thermal-tutorial.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SYSTEM SPECIFICATIONS

Input-Voltage Range

VIN

4.5

40

V

VIN = VCC = VDRV

4.5

5.5

Quiescent Supply Current

IIN_Q

VIN = 24V, VFB = 0.9V, no switching

2

3

mA

Shutdown Supply Current

IIN_SBY

VIN = 24V, VEN = 0V, IVCC = 0,

PGOOD = unconnected

0.35

0.55

mA

VCC REGULATOR

Output Voltage

VVCC

6V ≤ VIN ≤ 40V, ILOAD = 6mA

5

5.25

5.5

V

VCC Regulator Dropout

VIN = 4.5V, ILOAD = 25mA

0.18

0.45

V

VCC Short-Circuit Output Current

VIN = 5V

30

55

90

mA

VCC Undervoltage Lockout

VCCUVLO

VVCC rising

3.8

4

4.2

V

VCC Undervoltage Lockout

Hysteresis

400

mV

ERROR AMPLIFIER (FB, COMP)

FB Input-Voltage Set Point

VFB

584

590

596

mV

FB Input Bias Current

IFB

VFB = 0.6V

-250

+250

nA

FB to COMP Transconductance

gM

ICOMP = Q20FA

600

1200

1800

F

S

Open-Loop Gain

80

dB

Unity-Gain Bandwidth

Capacitor from COMP to GND =

47pF

5

MHz

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