SC174 datasheet(4/27 Pages) SEMTECH

Il numero della parte	SC174

Spiegazioni elettronici	4A EcoSpeedTM Synchronous Step-Down Regulator with Optional Ultrasonic Power Save

PDF	27 Pages

Scroll/Zoom	100%

Produttore elettronici	SEMTECH [Semtech Corporation]

Homepage	http://www.semtech.com

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4 / 27 page

Electrical Characteristics (continued)

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Soft start

Soft start Time(1)

Delay from PWM Switching to Output

Regulation

850

μs

Ultrasonic Power Save

Zero-Crossing Detector Threshold

LX - PGND

Ultrasonic Power Save Frequency

kHz

Power Good

Power Good Threshold

Power Good Signal Threshold High

116

120

124

OUT

Power Good Signal Threshold Low

PGOOD Delay Time(1)

VDD=3V

VDD=5V

Noise Immunity Delay Time

µs

Leakage

µA

Power Good On-Resistance

Ω

Fault Protection

Output Under-Voltage Fault

FB with Respect to REF,

8 Consecutive Clocks

-30

-25

-20

Output Over-Voltage Fault

FB with Respect to REF

+16

+20

+24

Smart PowerSave

Protection Threshold

FB with Respect to REF

+10

+13

OV, UV Fault Noise Immunity Delay

μs

Over-Temperature Shutdown

OT Latched

150

°C

Enable/Power Save

Output Enabled

Output Disabled

0.4

EN/PSV Input Bias Current

EN/PSV = VDD or 0V

0.5

8.0

μA

Power Save Enabled

Forced Continuous Conduction Mode

EN/PSV floating

Unless specified: V

IN =5V, TA=+25°C for Typ, -40°C to +85°C for Min and Max, TJ < 125°C

SC174

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