MAX16976 datasheet(4/17 Pages) MAXIM

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MAX16976

28V, 600mA Automotive Step-Down Converter

with Low Operating Current

Maxim Integrated

Note 2: When 3V < VOUT < 5.5V, the bias regulator is connected to the output to save quiescent current, VBIAS = VOUT.

Note 3: Guaranteed by design; not production tested.

ELECTRICAL CHARACTERISTICS (continued)

(VSUP = VSUPSW = 14V, VEN = 14V, L1 = 22FH, CIN = 4.7FF, COUT = 100FF, CBIAS = 1FF, CBST = 0.1FF, CCRES = 1nF, RFOSC =

61.9kI, TA = TJ = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Enable Threshold Voltage

Hysteresis

VEN,HYS

0.2

Enable Input Current

IEN

RESET

Reset Internal Switching Level

VTH_RISING VFB rising, VRESETI = 0V

96.5

%VFB

VTH_FALLING VFB falling, VRESETI = 0V

RESETI Threshold Voltage

VRESETI_HI VRESETI falling

1.05

1.25

1.4

CRES Threshold Voltage

VCRES_HI VCRES rising

1.07

1.13

1.19

CRES Threshold Hysteresis

VCRES_HYS

0.05

RESETI Input Current

IRESET

VRESETI = 0V

0.02

CRES Source Current

ICRES

VOUT in regulation

9.5

10.5

CRES Pulldown Current

ICRES_PD VOUT out of regulation

RES Output Low Voltage

ISINK = 5mA

0.4

RES Leakage Current (Open-

Drain Output)

VOUT in regulation

TA = +25°C

TA = +125°C

Reset Debounce Time

tRES_DEB VRESETI falling

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