SC189CSKTRT Semtech, SC189CSKTRT Datasheet - Page 13

• Manufacturer Part Number: SC189CSKTRT
• Description: IC BUCK 1.2V 1.5A SOT23-5
• Manufacturer: Semtech
• Type: Step-Down (Buck)r

Specifications of SC189CSKTRT

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.2V
• Current - Output: 1.5A
• Frequency - Switching: 2.5MHz
• Voltage - Input: 2.9 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: SC189CSKTR

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