SC414 datasheet(6/29 Pages) SEMTECH

6 / 29 page

SC414/SC424

Electrical Characteristics (continued)

Parameter

Conditions

Min

Typ

Max

Units

Power Good

Power Good Threshold

Upper limit, V

> internal 750mV reference

+20

Lower limit, V

< internal 750mV reference

-10

Start-Up Delay Time (Time between EN going

high and PGOOD going high)

V5V = 3V

V5V = 5V

Fault (noise immunity) Delay Time(2)

5μs

Leakage

1μA

Power Good On-Resistance

Fault Protection

Valley Current Limit

V5V = 5V, R

ILIM

= 5k Ω

Valley Current Limit

V5V = 3V, R

ILIM

= 5k Ω

3.4

LIM

Source Current

8μA

LIM

Comparator Offset

With respect to AGND

-8

Output Under-Voltage Fault

with respect to internal 750mV reference,

8 consecutive clock cycles

-25

Smart Power-save Protection Threshold (2)

with respect to internal 750mV reference

+10

Over-Voltage Protection Threshold

with respect to internal 750mV reference

+20

Over-Voltage Fault Delay(2)

5μs

Over-Temperature Shutdown(2)

10°C hysteresis

150

°C

Logic Inputs/Outputs

Logic Input High Voltage

ENL

Logic Input Low Voltage

ENL

0.4

EN/PSV Input for PSAVE Operation (2)

% of V5V

100

EN/PSV Input for Forced Continuous Operation (2)

% of V5V

EN/PSV Input for Disabling Switcher (2)

0.4

EN/PSV Input Bias Current

EN/PSV= V5V or AGND

-10

+10

μA

ENL Input Bias Current

= 28V

μA

FB Input Bias Current

FB = V5V or AGND

-1

μA

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