MAX17503 datasheet(4/19 Pages) MAXIM

Part #	MAX17503

Description	Wide 4.5V to 60V Input Voltage Range

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Manufacturer	MAXIM [Maxim Integrated Products]

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Maxim Integrated │ 4

MAX17503

4.5V-60V, 2.5A, High-Efficiency,

Synchronous Step-Down DC-DC Converter

With Internal Compensation

www.maximintegrated.com

Electrical Characteristics (continued)

(VIN = VEN/UVLO=24V,RRT = 40.2kI(500kHz),CVCC=2.2μF,VPGND = VSGND = VMODE = VSYNC = 0V, LX = SS = RESET = open,

VBST to VLX = 5V, VFB = 1V, TA = TJ = -40ºC to +125ºC, unless otherwise noted. Typical values are at TA = +25ºC. All voltages are

referencedtoSGND,unlessotherwisenoted.)(Note2)

Note 2: All limits are 100% tested at +25ºC. Limits over temperature are guaranteed by design.

Note 3: See the Overcurrent Protection/Hiccup Mode Section for more details.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX UNITS

SYNC Pulse Width

50

ns

SYNC Threshold

VIH

2.1

V

VIL

0.8

FB Undervoltage Trip Level to

CauseHiccup

VFB-HICF

0.56

0.58

0.65

V

HiccupTimeout

(Note 3)

32,768

Cycles

Minimum On-Time

tON-MIN

135

ns

Minimum Off-Time

tOFF-MIN

140

160

ns

LX Dead Time

5

ns

RESET

RESET Output Level Low

IRESET = 10mA

0.4

V

RESET Output Leakage Current

TA = TJ = +25ºC, VRESET = 5.5V

-0.1

+0.1

µA

FB Threshold for RESET Assertion

VFB-OKF

VFB falling

90.5

92

94.6 %VFB-

REG

FB Threshold for RESET

Deassertion

VFB-OKR

VFB rising

93.8

95

97.8 %VFB-

REG

RESET Deassertion Delay After FB

Reaches95%Regulation

1024

Cycles

THERMAL SHUTDOWN

Thermal-Shutdown Threshold

Temperature rising

165

ºC

Thermal-ShutdownHysteresis

10

ºC

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