MAX17630 datasheet(4/24 Pages) MAXIM

4 / 24 page

(VIN = VEN/UVLO = 24V, RRT = unconnected (fSW = 400 kHz), CVCC = 2.2μF, VMODE/SYNC = VEXTVCC = VSGND = VPGND = 0V,

VFB = 3.67V (MAX17630A), VFB = 5.5V (MAX17630B),VFB = 1V (MAX17630C), LX = SS = RESET = Open, VBST to VLX = 5V,

TA = -40°C to 125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise

noted.) (Note 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

FEEDBACK (FB)

FB Regulation Voltage

VFB-REG

MODE/SYNC = SGND or MODE/SYNC = VCC,

for MAX17630A

3.26

3.3

3.34

MODE/SYNC = SGND or MODE/SYNC = VCC,

for MAX17630B

4.94

5.06

MODE/SYNC = SGND or MODE/SYNC = VCC

for MAX17630C

0.889

0.9

0.911

MODE/SYNC = Open, for MAX17630A

3.26

3.36

3.43

MODE/SYNC = Open, for MAX17630B

4.94

5.09

5.20

MODE/SYNC = Open for MAX17630C

0.89

0.915

0.936

FB Input-Bias Current

IFB

For MAX17630A

μA

For MAX17630B

0 ≤ VFB ≤ 1V, TA = 25ºC For MAX17630C

-50

+50

MODE/SYNC

MODE Threshold

VM-DCM

MODE/SYNC = VCC (DCM mode)

VCC - 0.65

VM-PFM

MODE/SYNC = Open (PFM mode)

VCC/2

VM-PWM

MODE/SYNC = SGND (PWM mode)

0.75

SYNC Frequency-Capture

Range

fSYNC

fSW set by RRT

1.1 x fSW

1.4 x fSW

kHz

SYNC Pulse Width

SYNC Threshold

VIH

2.1

VIL

0.8

CURRENT LIMIT

Peak Current-Limit

Threshold

IPEAK-LIMIT

1.6

1.86

2.14

Runaway Peak

Current-Limit Threshold

IRUNAWAY-

LIMIT

1.89

2.32

2.6

PFM Peak Current-Limit

Threshold

IPFM

MODE/SYNC = Open

0.41

Valley Current-Limit

Threshold

IVALLEY-

LIMIT

MODE/SYNC = Open or MODE/SYNC = VCC

-0.15

+0.15

MODE/SYNC = SGND, VFB > 0.65

-1.8

Electrical Characteristics (continued)

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Maxim Integrated │ 4

MAX17630

4.5V to 36V, 1A, High-Efficiency,

Synchronous Step-Down DC-DC Converter

MAX17630 Datasheet(PDF) 4 Page - Maxim Integrated Products

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