SC189ASKTRT Semtech, SC189ASKTRT Datasheet - Page 11

• 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.
100mV/div
500mA/div
500mA/div
10mV/div
2V/div
5V/div
2V/div
1V/div
Transient Response (V
V
V
V
I
V
V
OUT
OUT
OUT
V
OUT
I
LX
EN
LX
IN
V
R
V
I
V
I
Output Voltage Ripple (V
OUT
OUT
IN
IN
IN
OUT
=5.0V
=5.0V
=5.0V
=0A
=0A to 0.5A
=1k
Start Up (Enable)(V
Output Voltage Ripple (V
Transient Response (V
OUT
=3.3V (SC189ZULTRT); L= 2.2uH (TOKO: 1071AS-2R2); C
Start Up (V
(continued)
200µs/div
500ns/div
50µs/div
OUT
=3.3V; 0A to 0.5A)
OUT
OUT
=3.3V)
=3.3V)
OUT
OUT
=3.3V)
OUT
=3.3V)
=3.3V)
11
IN
= C
500mA/div
100mV/div
500mA/div
10mV/div
Transient Response (V
OUT
2V/div
5V/div
2V/div
1V/div
V
V
V
I
V
V
OUT
OUT
OUT
V
OUT
= 10uF/6.3V (Murata: GRM21BR60J106K).
I
LX
LX
EN
IN
V
R
V
I
V
I
Output Voltage Ripple (V
OUT
OUT
IN
IN
OUT
IN
=5.0V
=5.0V
=5.0V
=1.5A
=0.5A to 1A
=2.2
Start Up (Enable)(V
Output Voltage Ripple (V
Transient Response (V
Start Up (V
OUT
200µs/div
500ns/div
50µs/div
=3.3V; 0.5A to 1.0A)
OUT
OUT
=3.3V)
=3.3V)
OUT
OUT
=3.3V)
OUT
www.semtech.com
=3.3V)
=3.3V)
SC189