SC189ASKTRT Semtech, SC189ASKTRT Datasheet - Page 13

• Manufacturer Part Number: SC189ASKTRT
• Description: 2.5MHz, 1.5A Synchronous Step Down Regulator In SOT-23_5
• Manufacturer: Semtech

Typical Waveforms
Circuit Conditions: V
© 2009 Semtech Corp.
500mA/div
500mA/div
500mA/div
Offset: 0A
20mV/div
10mV/div
10mV/div
2V/div
2V/div
V
V
V
I
V
V
OUT
OUT
OUT
OUT
I
I
LX
LX
LX
LX
V
I
V
I
V
I
Output Voltage Ripple (V
OUT
Output Voltage Ripple (V
OUT
OUT
IN
IN
IN
=3.3V
=5.0V
=5.0V
Transient Response (V
=0A
=0A
=0A to 0.5A
Output Voltage Ripple (V
Output Voltage Ripple (V
Transient Response (V
OUT
=1.0V (SC189AULTRT); L= 1uH (Murata: LQM2HPN1R0NG0L); C
(continued)
500ns/div
500ns/div
50µs/div
OUT
OUT
OUT
=1.0V)
OUT
=1.0V)
=1.0V)
OUT
OUT
=1.0V)
=1.0V)
=1.0V)
13
500mA/div
10mV/div
10mV/div
20mV/div
2V/div
1A/div
2V/div
1A/div
V
V
V
V
I
OUT
V
OUT
OUT
OUT
IN
I
I
LX
LX
LX
LX
= 10uF/6.3V; C
V
I
V
I
V
I
Output Voltage Ripple (V
Output Voltage Ripple (V
OUT
OUT
OUT
IN
IN
IN
=3.3V
=5.0V
=5.0V
Transient Response (V
=1.5A
=1.5A
=0.5A to 1A
Output Voltage Ripple (V
Output Voltage Ripple (V
Transient Response (V
OUT
= 22uF/6.3V (Murata: GRM21BR60J226M).
500ns/div
500ns/div
50µs/div
OUT
OUT
OUT
=1.0V)
OUT
=1.0V)
=1.0V)
OUT
OUT
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=1.0V)
=1.0V)
=1.0V)
SC189