MAX17501 datasheet(3/16 Pages) MAXIM

Part #	MAX17501

Description	60V, 500mA, Ultra-Small, High-Efficiency,Synchronous Step-Down DC-DC Converter

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Manufacturer	MAXIM [Maxim Integrated Products]

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�� Maxim Integrated Products 3

MAX17501

60V, 500mA, Ultra-Small, High-Efficiency,

Synchronous Step-Down DC-DC Converter

ELECTRICAL CHARACTERISTICS (continued)

(VIN = 24V, VGND = VPGND = 0V, CVIN = CVCC = 1FF, VEN = 1.5V, CSS = 3300pF, VFB = 0.98 x VOUT, LX = unconnected, RESET =

unconnected. TA = TJ = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC. All voltages are referenced to GND,

unless otherwise noted.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

LX

LX Leakage Current

ILX_LKG

VEN = 0V, TA = +25NC,

VLX = (VPGND + 1V) to (VIN - 1V)

1

F

A

SOFT-START (SS)

Switchover to Internal Reference-

Voltage Threshold

VSS-TH

863

880

898

mV

Charging Current

ISS

VSS = 0.5V

4.7

5

5.3

F

A

FEEDBACK (FB)

FB Input Bias Current

IFB

TA = +25NC

MAX17501E,

VFB = 3.3V

6.8

12

17

F

A

MAX17501F,

VFB = 5V

6.8

12

17

F

A

OUTPUT VOLTAGE (VOUT)

Output Voltage Range

MAX17501E only

3.248

3.3

3.352

MAX17501F only

4.922

5

5.08

CURRENT LIMIT

Peak-Current-Limit Threshold

IPEAK-LIMIT

0.585

0.685

0.795

A

Runaway-Current-Limit Threshold

IRUNAWAY-

LIMIT

0.73

0.865

1

A

Valley Current-Limit Threshold

ISINK-LIMIT

0.3

0.35

0.4

A

TIMING

Switching Frequency

fSW

VFB >

VOUT-HICF

MAX17501E/F

560

600

640

kHz

VFB <

VOUT-HICF

280

300

320

Events to Hiccup After Crossing

Runaway-Current Limit

1

VOUT Undervoltage Trip Level to

Cause Hiccup

VOUT-HICF

VSS > 0.95V (soft-start is done)

69.14

71.14

73.14

%

HICCUP Timeout

32,768

Cycles

Minimum On-Time

tON_MIN

85

120

ns

Maximum Duty Cycle

DMAX

VFB = 0.98 x VFB-

REG

MAX17501E/F

92

94

96

%

LX Dead Time

5

ns

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