SC21152 datasheet(4/18 Pages) SEMTECH

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SC21152

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Output Voltage (continued)

Output Voltage Line Regulation

dVline

5.5V > VIN > (Vout +1), PWM operation

0.17

%/V

Output Voltage Load Regulation

dVload

500mA < ILOAD < 1.2A

-0.13

%/A

Maximum Output Current

IOUT

Continuous current

1.2

Soft Start(1)

Soft Start Time (1)

TSS

FB: from rising edge to 95% of final value

100

μs

LX Switching Node

On Resistance High-side

Rdson_hs

FB = 0V; ILX = 500mA

180

mΩ

On Resistance Low-side

Rdson_ls

FB = VIN; ILX = 500mA

140

mΩ

LX Leakage Current High Side

ILX_hs

VIN = 5.5V; FB = VIN; VLX = 0V

-1.5

-0.1

μA

LX Leakage Current Low Side

ILX_ls

FB = 0V; VLX = VIN;

Vout Automatic Discharge disabled

0.1

μA

LX Pulldown Current(1)

ILX_pd

EN = 0V; VLX = 1V;

Vout Automatic Discharge enabled

Switching Frequency(1)

Fsw

4MHz PWM operation, 500mA load,

adjustable output, VOUT = 2.5V

3.6

4.0

4.4

MHz

Current Sense

High Side Current Limit

ILIMhs

Current from VIN to LX

1.5

2.2

3.0

Low Side Current Limit

ILIMls

Current from LX to GND

-0.8

Zero Cross Detector Threshold

Ithzcpfm

Power Save Mode and DC Test condition

Thermal Protection

Over-Temperature Shutdown

Tts_rise

Rising temperature

160

°C

Over-Temperature Hysteresis

Tts_hyst

°C

EN Input

EN Input High Threshold

VIHen

1.2

EN Input Low Threshold

VILen

0.4

EN Input High Current

IIHen

VEN = VIN

-1

μA

EN Input Low Current

IILen

VEN = 0V

μA

Electrical Characteristics (continued)

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