MAX16903RATB datasheet(3/13 Pages) MAXIM

Part #	MAX16903RATB

Description	2.1MHz, High-Voltage, 1A Mini-Buck Converter Thermal Shutdown Protection

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Manufacturer	MAXIM [Maxim Integrated Products]

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2.1MHz, High-Voltage, 1A Mini-Buck Converter

_______________________________________________________________________________________

3

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VSUP = +14V, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.)

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

(Voltages referenced to GND.)

SUP, EN..................................................................-0.3V to +42V

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

LX..............................................................-0.3V to (VSUP + 0.3V)

BST .........................................................................-0.3V to +47V

OUTS ......................................................................-0.3V to +12V

SYNC, PGOOD, BIAS............................................-0.3V to +6.0V

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

LX Continuous RMS Current .................................................1.5A

OUTS Short-Circuit Duration ......................................Continuous

ESD Protection

Human Body Model .........................................................±2kV

Machine Model ..............................................................±200V

Continuous Power Dissipation (TA = +70°C)

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

TSSOP (derate 26.1 mW/°C above +70°C) ...................2089mW

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

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

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

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

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

PACKAGE THERMAL CHARACTERISTICS (Note 1)

TDFN

Junction-to-Ambient Thermal Resistance (

θJA) ...........41°C/W

Junction-to-Case Thermal Resistance (

θJC) ..................9°C/W

TSSOP

Junction-to-Ambient Thermal Resistance (

θJA) ........38.3°C/W

Junction-to-Case Thermal Resistance (

θJC) ..................3°C/W

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

(Note 2)

3.5

28

Supply Voltage Range

VSUP

t < 1s

42

V

EN = low

4

8

EN = high, no load

25

35

μA

Supply Current

ISUP

EN = high, continuous, no switching

1

mA

VUVLO

Bias rising

2.8

3

3.2

UV Lockout

VUVLO,HYS Hysteresis

0.4

V

Bias Voltage

VBIAS

+5.5V

VSUP

+42V

5

V

Bias Current Limit

IBIAS

10

mA

BUCK CONVERTER

VOUT = 5V, fixed frequency

-2.0%

5

+2.5%

VOUT,5V

VOUT = 5V, SKIP mode (Note 3)

-2.0%

5

+4%

VOUT = 3.3V, fixed frequency

-2.0%

3.3

+2.5%

VOUT,3.3V

VOUT = 3.3V, SKIP mode (Note 3)

6V

VSUP

18V,

ILOAD = 0 to 1A,

TA = 0°C to

+125°C

-2.0%

3.3

+4%

VOUT = 5V, fixed frequency

-3.0%

5

+2.5%

VOUT,5V

VOUT = 5V, SKIP mode (Note 3)

-3.0%

5

+4%

VOUT = 3.3V, fixed frequency

-3.0%

3.3

+2.5%

Voltage Accuracy

VOUT,3.3V

VOUT = 3.3V, SKIP mode (Note 3)

6V

VSUP

18V,

ILOAD = 0 to 1A,

TA = -40°C to

+125°C

-3.0%

3.3

+4%

V

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