Rainbow-electronics MAX17031 Manual de usuario descargar pdf (Pagina 6)

MAX17031

Dual Quick-PWM Step-Down Controller with Low-

Power LDO and RTC Regulator for MAIN Supplies

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 2, no load on LDO5, RTC, OUT1, OUT2, and REF, V

= 12V, V

= V

SKIP

= 5V, ONLDO = RTC, ON1 = ON2

= V

, T

= -40°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LINEAR REGULATOR (LDO5)

LDO5 Output-Voltage Accuracy V

LDO5

= 6V to 24V, ON1 = GND;

0mA < I

LDO5

< 100mA

4.85 5.15 V

LDO5 Short-Circuit Current LDO5 = GND 260 mA

LDO5 Regulation Reduction/

Bootstrap Switchover Threshold

Falling edge of OUT1 -12.0 -5.0 %

LDO5 Bootstrap Switch

Resistance

LDO5 to OUT1, V

OUT1

= 5V (Note 3) 4.5 

Undervoltage Lockout

Threshold

Falling edge of V

, PWM disabled below

this threshold

3.8 4.3 V

3.3V ALWAYS-ON LINEAR REGULATOR (RTC)

ON1 = ON2 = GND, V

= 6V to 24V,

0 < I

RTC

< 5mA

3.18 3.45

RTC Output-Voltage Accuracy V

RTC

ON1 = ON2 = ONLDO = GND, V

= 6V to

24V, 0 < I

RTC

< 5mA

3.16 3.50

RTC Short-Circuit Current RTC = GND 5 22 mA

REFERENCE (REF)

Reference Voltage V

REF

= 4.5V to 5.5V, I

REF

= 0 1.975 2.025 V

Reference Load Regulation Error V

REF

= -20µA to +50µA -10 +10 mV

OUT1 FAULT DETECTION

OUT1 Overvoltage and

PGOOD Trip Threshold

With respect to error comparator threshold 10 16 %

OUT1 Undervoltage

Protection Trip Threshold

With respect to error comparator threshold 63 77 %

OUT2 FAULT DETECTION

OUT2 Overvoltage and

PGOOD Trip Threshold

With respect to error comparator threshold 10 16 %

OUT2 Undervoltage

Protection Trip Threshold

With respect to error comparator threshold 63 77 %

POWER-GOOD

PGOOD Lower Trip Threshold

With respect to either error comparator

threshold, falling edge, hysteresis = 1%

-16 -10 %

PGOOD Output Low Voltage

ON1 or ON2 = GND (PGOOD low

impedance), I

SINK

= 4mA

0.3 V

1 2 3 4 5 6 7 8 9 10 11 ... 23 24

MAX17031 1

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Rainbow-electronics MAX17031 Manual de usuario Pagina 6

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