SC189CSKTRT Semtech, SC189CSKTRT Datasheet - Page 11

• 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.
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
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=3.3V)
=3.3V)
SC189