MAX17101 查看數據表（PDF） - Maxim Integrated

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MAX17101

Dual Quick-PWM, Step-Down Controller with Low-Power LDO, RTC Regulator

Maxim Integrated 

Dual Quick-PWM, Step-Down Controller

with Low-Power LDO, RTC Regulator

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, no load on LDO, RTC, OUT1, OUT2, and REF, VIN = 12V, VDD = VCC = VSECFB = 5V, VREFIN2 = 1.0V, BYP =

LDOSEL = GND, ONLDO = IN, ON1 = ON2 = VCC, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

LDO Short-Circuit Current

IILIM(LDO) LDO = GND

100

260

mA

LDO Regulation Reduction/

Bypass Switchover Threshold

With respect to the LDO voltage,

falling edge of BYP

-11.0 -8.5 -6.0

%

LDO Bypass Switchover

Threshold

With respect to the LDO voltage,

rising edge of BYP

-6.5

%

LDO Bypass Switchover

Startup Timeout

tBYP

Rising edge of BYP to bypass gate pulled

low

500

μs

LDO Bypass Switch Resistance

LDO to BYP, VBYP = 5V (Note 4)

VCC Undervoltage-Lockout

(UVLO) Threshold

Falling edge of VCC,

VUVLO(VCC) PWM disabled below this threshold

Rising edge of VCC

Thermal-Shutdown Threshold

TSHDN Hysteresis = 10°C

3.3V ALWAYS-ON LINEAR REGULATOR (RTC)

1.2

4.5

3.8

4.0

4.3

V

4.2

+160

°C

RTC Output-Voltage Accuracy

RTC Short-Circuit Current

REFERENCE (REF)

Reference Voltage

Reference Load Regulation

REF Lockout Voltage

OUT1 FAULT DETECTION

VRTC

IILIM(RTC)

ON1 = ON2 = GND, VIN = 6V to 24V,

0 < IRTC < 5mA

ON1 = ON2 = ONLDO = GND,

VIN = 6V to 24V, 0 < IRTC < 5mA

RTC = GND

VREF

VREF

VREF(UVLO)

VCC = 4.5V to 5.5V, IREF = 0

IREF = -20μA to +50μA

Rising edge, 350mV (typ) hysteresis

3.23 3.33 3.43

V

3.16

3.50

5

mA

1.980 2.00 2.020

V

-10

+10

mV

1.95

V

OUT1 Overvoltage Trip

Threshold

VOVP(OUT1) With respect to error-comparator threshold

12

16

20

%

OUT1 Overvoltage

Fault-Propagation Delay

tOVP FB1 forced 50mV above trip threshold

10

μs

OUT1 Undervoltage Protection

Trip Threshold

VUVP(OUT1) With respect to error-comparator threshold

65

70

75

%

OUT1 Output-Undervoltage

Fault-Propagation Delay

tUVP

10

μs

PGOOD1 Lower Trip Threshold

With respect to error-comparator threshold,

-20

-16

-12

%

falling edge, hysteresis = 1%

PGOOD1 Propagation Delay

tPGOOD1

FB1 forced 50mV beyond PGOOD1 trip

threshold, falling edge

10

μs

PGOOD1 Output Low Voltage

PGOOD1 Leakage Current

IPGOOD1

VFB1 = 0.56V (PGOOD1 low impedance),

ISINK = 4mA

VFB1 = 0.70V (PGOOD1 high impedance),

PGOOD1 forced to 5.5V

0.3

V

1

μA

4 _______________________________________________________________________________________

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