MAX8717 查看數據表（PDF） - Maxim Integrated

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MAX8717

Interleaved High-Efficiency, Dual Power-Supply Controllers for Notebook Computers

Maxim Integrated 

Interleaved High-Efficiency, Dual Power-Supply

Controllers for Notebook Computers

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, VIN = 12V, FSEL = REF, SKIP_ = 0, VON_ = VILIM_ = VCC = VDD = 5V, TA = -40°C to +85°C, unless otherwise

noted.) (Note 6)

PARAMETER

Current-Limit Threshold (Fixed)

Current-Limit Threshold

(Adjustable)

REFERENCE (REF)

Reference Voltage

FAULT DETECTION

Output Overvoltage Trip

Threshold

SYMBOL

CONDITIONS

VLIMIT_

VLIMIT_

VCSH_ - VCSL _, ILIM_ = VCC (Note 3)

VCSH_ - VCSL _

VILIM_ = 2.00V

VILIM_ = 1.00V

VREF VCC = 4.5V to 5.5V, IREF = 0

MAX8716/MAX8717 only

MIN TYP MAX UNITS

44

56

mV

188

212

mV

93

107

1.98

2.02

V

11

19

%

Output Undervoltage-Protection

Trip Threshold

With respect to error-comparator threshold

65

75

%

PGOOD_ Lower Trip Threshold

PGOOD_ Output Low Voltage

GATE DRIVERS

DH_ Gate-Driver On-Resistance

DL_ Gate Driver On-Resistance

INPUTS AND OUTPUTS

ON_ Input Voltage

Three-Level Input Logic

With respect to error-comparator threshold,

hysteresis = 1%

ISINK = 4mA

-12.5

RDH BST_ - LX_ forced to 5V (Note 5)

DL_, high state (Note 5)

RDL

DL_, low state (Note 5)

Rising edge, hysteresis = 225mV

SKIP1, SKIP2, FSEL

High

REF

GND

1.2

VCC -

0.2

1.7

-8.0

%

0.4

V

5

Ω

5

Ω

3

2.2

V

2.3

V

0.5

Note 2: When the inductor is in continuous conduction, the output voltage will have a DC regulation level lower than the error-com-

parator threshold by 50% of the ripple. In discontinuous conduction, the output voltage will have a DC regulation level high-

er than the error-comparator threshold by 50% of the ripple.

Note 3: Default setting for the MAX8716.

Note 4: Specifications are guaranteed by design, not production tested.

Note 5: Production testing limitations due to package handling require relaxed maximum on-resistance specifications for the thin QFN

package.

Note 6: Specifications from 0°C to -40°C are guaranteed by design, not production tested.

6 _______________________________________________________________________________________

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