SC418 datasheet(5/30 Pages) SEMTECH

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SC418

Electrical Characteristics (continued)

Parameter

Conditions

Min

Typ

Max

Units

Power Good On Resistance

Ω

Fault Protection

LIM Source Current

μA

LIM Source Current Temperature Coefficient

(2)

0.41

%/°C

LIM Comparator Offset

With respect to AGND

-8

Output Under-Voltage Threshold

FB with respect to internal 500mV reference,

8 consecutive cycles

-25

Smart Power-Save Protection Threshold(2)

FB with respect to internal 500mV reference

+10

Over-Voltage Protection Threshold

FB with respect to internal 500mV reference

+20

Over-Voltage Fault Delay(2)

μs

Over-Temperature Shutdown(2)

10°C hysteresis

150

°C

Logic Inputs/Outputs

Logic Input High Voltage - EN, ENL (5)

1.0

Logic Input High Voltage - PSV

Forced continuous mode operation;

PSV with respect to VDDA

-0.4

Logic Input Low Voltage - EN, ENL

With respect to AGND

0.4

EN Input Bias Current

EN = VDDA or AGND

-10

+10

μA

ENL Input Bias Current

IN = 28V

-1

+18

μA

FB, FBL Input Bias Current

FB, FBL = VDDA or AGND

-1

μA

PSV Input Bias Current

PSV = VDDA

μA

Linear Dropout Regulator

FBL Accuracy

VLDO load = 10mA

0.735

0.75

0.765

Current Limit

Start-up and foldback;

LDO < 90% of programmed value

115

Operating

135

200

VLDO to VOUT Switch-over Threshold (6)

-140

+140

VLDO to VOUT Non-switch-over Threshold (6)

-450

+450

VLDO to VOUT Switch-over Resistance

LDO = VOUT = 5V

LDO = VOUT = 3.3V

(2)

2.0

2.2

Ω

LDO Drop Out Voltage(7)

IN to VVLDO, VVLDO = 5V, VLDO load = 100mA

1.2

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