MAX15048 Ver la hoja de datos (PDF) - Maxim Integrated

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MAX15048

Triple-Output Buck Controllers with Tracking/Sequencing

Maxim Integrated 

MAX15048/MAX15049

Triple-Output Buck Controllers

with Tracking/Sequencing

ELECTRICAL CHARACTERISTICS (continued)

(VIN = 12V or VIN = VREG = 5V, VDREG_ = VREG, VPGND_ = 0V, CREG = 2.2FF, RRT = 39.2kI, TA = -40NC to +85NC, unless otherwise

noted. Typical values are at TA = TJ = +25NC.) (Note 2)

PARAMETER

OSCILLATOR

Switching Frequency Range

(Each Converter)

Switching Frequency Accuracy

(Each Converter)

SYMBOL

CONDITIONS

fSW

fSW minimum, VRT = 0.5V

fSW maximum, VRT = 3V

fSW = 500kHz

MIN TYP MAX UNITS

200

kHz

1200

-4

+4

%

Phase Delay

DH1 rising to DH2 rising and DH2 rising to

DH3 rising

120

Degrees

RT Current

Minimum Controllable On-Time

Minimum Off-Time

PWM Ramp Amplitude (P-P)

PWM Ramp Valley

DRIVERS

tON(MIN)

tOFF(MIN)

VRT = 0.5V to 3V

31.5

32

32.5

FA

75

ns

300

ns

1.0

V

1.2

V

DL_, DH_

Break-Before-Make Time

CLOAD = 2nF

35

ns

DH1 On-Resistance

DH2 On-Resistance

DH3 On-Resistance

DL1 On-Resistance

DL2 On-Resistance

DL3 On-Resistance

CURRENT-LIMIT AND HICCUP MODE

Low, sinking 100mA

High, sourcing 100mA

Low, sinking 100mA

High, sourcing 100mA

Low, sinking 100mA

High, sourcing 100mA

Low, sinking 100mA

High, sourcing 100mA

Low, sinking 100mA

High, sourcing 100mA

Low, sinking 100mA

High, sourcing 100mA

0.8

I

2.4

0.8

I

2.4

0.8

I

2.4

0.6

I

2.4

0.6

I

2.4

0.6

I

2.4

Cycle-by-Cycle Valley

Current-Limit Threshold

VLIM TA = TJ = +25NC

69

mV

Threshold Temperature

Coefficient

3333

ppm/NC

Number of Cumulative

Current-Limit Events to Hiccup

NCL

8

Events

Number of Consecutive

Noncurrent-Limit Cycles to

Clear NCL

Hiccup Timeout

NCLR

NHT

3

4096

Events

Clock

periods

Maxim Integrated

  3

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