MAX15026DATD Просмотр технического описания (PDF) - Maxim Integrated

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MAX15026DATD

Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller

Maxim Integrated 

Low-Cost, Small, 4.5V to 28V Wide Operating

Range, DC-DC Synchronous Buck Controller

ELECTRICAL CHARACTERISTICS (continued)

(VIN = 12V, RRT = 27kΩ, RLIM = 30kΩ, CVCC = 4.7µF, CIN = 1µF, TA = -40°C to +85°C (MAX15026B/CETD+, MAX15026BETD/V+),

TA = TJ = -40°C to +125°C (MAX15026B/C/DATD+), unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

LIM Reference Current

ILIM

VLIM = 0.3V to 3V (Note 4)

45

50

55

µA

LIM Reference Current Tempco

VLIM = 0.3V to 3V

2300

ppm/°C

Number of Consecutive Current-

Limit Events to Hiccup

7

Events

Soft-Start Timeout

4096

Switching

Cycles

Soft-Start Restart Timeout

8192

Switching

Cycles

Hiccup Timeout

Out of soft-start

4096

Switching

Cycles

Peak Low-Side Sink Current

Limit

Sink limit = 1.5V, RLIM = 30kΩ (Note 4)

75

mV

BOOST

Boost Switch Resistance

POWER-GOOD OUTPUT

VIN = VCC = 5V, IBST = 10mA

3

8

Ω

PGOOD Threshold Rising

90

94.5 97.5

%VFB

PGOOD Threshold Falling

PGOOD Output Leakage

PGOOD Output Low Voltage

THERMAL SHUTDOWN

Thermal-Shutdown Threshold

Thermal-Shutdown Hysteresis

88

ILEAK_PGD VIN = VPGOOD = 28V, VEN = 5V, VFB = 1V -1

VPGOOD_L IPGOOD = 2mA, EN = GND

92 94.5

+1

0.4

Temperature rising

Temperature falling

+150

20

%VFB

µA

V

°C

°C

Note 2: All devices are 100% tested at room temperature and guaranteed by design over the specified temperature range.

Note

3:

Select

RRT

as:

RRT

=

fSW

17.3 × 109

+ (1x10−7)x(fSW2)

where fSW is in Hertz.

Note 4: TA = +25°C.

Note 5: 10ns for MAX15026B, 18ns for the MAX15026C/D.

Note 6: 10ns for MAX15026B, 20ns for the MAX15026C/D.

4 _______________________________________________________________________________________

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