MAX8655ETN(2007) Просмотр технического описания (PDF) - Maxim Integrated

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производитель

MAX8655ETN
(Rev.:2007)

Highly Integrated, 25A, Wide-Input, Internal MOSFET, Step-Down Regulator

Maxim Integrated 

Highly Integrated, 25A, Wide-Input,

Internal MOSFET, Step-Down Regulator

ELECTRICAL CHARACTERISTICS (continued)

(VIN = 12V, VBST - VLX = 6.5V, TA = -40°C to +85°C, circuit of Figure 4, typical values are at TA = +25°C, unless otherwise noted.) (Note 2)

PARAMETER

CONDITIONS

MIN

TYP MAX UNITS

ERROR AMPLIFIER

REFIN = AVL

0.693 0.7 0.707

FB Regulation Voltage

VREFIN = 0.7V to 1.5V

VREFIN -

0.00375

VREFIN

VREFIN +

0.00375

V

Transconductance

70

110

160

µS

COMP Shutdown Resistance

FB Input Leakage Current

FB Input Common-Mode Range

From COMP to GND, VEN = 0V

VFB = 0.7V

20

100

Ω

5

50

nA

-0.1

+1.5

V

CURRENT-SENSE AMPLIFIER

Voltage Gain

VCS+ - VCS- = 30mV

VOUT = 0 to 5.5V

Part to part variation at TA = +85°C

-4

12

V/V

+4

%

CURRENT LIMIT

Peak Current-Limit

Threshold (VCS+ - VCS-)

RILIM1 = 24kΩ

ILIM1 = AVL

27.2

32

36.8

mV

60

80

92

Negative Current Limit

% of valley current limit

-90

-120 -150

%

CS+, CS- Input Bias Current

VCS+ = VCS- = 0 or 5.5V

-25

+25

µA

CS+, CS- Input Common-Mode

Range

0

5.5

V

SLOPE COMPENSATION

Slope Compensation at Maximum

Duty Cycle

VSCOMP = 2.5V

VSCOMP = 1.25V

SCOMP = AVL

SCOMP = GND

TA = 0°C to +85°C

TA = -40°C to +85°C

231.25 250.00 268.75

113.77 123.00 132.23

231.25 250.00 268.75 mV

113.77 123.00 132.23

110.70 123.00 132.23

SCOMP High Threshold

VAVL -

0.5

V

SCOMP Low Threshold

0.5

V

SCOMP Adjustment Range

SCOMP Input Leakage Current

VSCOMP = 1.25V to 2.5V

1.25

2.50

V

5

200

nA

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