SC189ZSKTRT Semtech, SC189ZSKTRT Datasheet - Page 9

• Manufacturer Part Number: SC189ZSKTRT
• Description: IC BUCK 3.3V 1.5A SOT23-5
• Manufacturer: Semtech
• Type: Step-Down (Buck)r

Specifications of SC189ZSKTRT

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 3.3V
• 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: SC189ZSKTR

Typical Waveforms
Circuit Conditions: V
© 2009 Semtech Corp.
100mV/div
500mA/div
500mA/div
500mA/div
10mV/div
10mV/div
2V/div
2V/div
Transient Response (V
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
=5.0V
=3.3V
=5.0V
=0A
=0A
=0A to 0.5A
Output Voltage Ripple (V
Output Voltage Ripple (V
Transient Response (V
OUT
=1.5V (SC189HULTRT); L= 2.2uH (TOKO: 1071AS-2R2M); C
500ns/div
500ns/div
50µs/div
OUT
=1.5V; 0A to 0.5A)
OUT
OUT
OUT
=1.5V)
=1.5V)
OUT
OUT
=1.5V)
=1.5V)
=1.5V)
9
100mV/div
500mA/div
500mA/div
500mA/div
IN
10mV/div
10mV/div
= C
Transient Response (V
2V/div
2V/div
V
V
V
I
V
V
OUT
OUT
OUT
OUT
OUT
I
I
LX
LX
LX
LX
= 10uF/6.3V (Murata: GRM21BR60J106K).
V
I
V
I
V
I
Output Voltage Ripple (V
Output Voltage Ripple (V
OUT
OUT
OUT
IN
IN
IN
=5.0V
=3.3V
=5.0V
=1.5A
=1.5A
=0.5A to 1A
Output Voltage Ripple (V
Output Voltage Ripple (V
Transient Response (V
OUT
500ns/div
500ns/div
50µs/div
=1.5V; 0.5A to 1.0A)
OUT
OUT
OUT
=1.5V)
=1.5V)
OUT
OUT
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=1.5V)
=1.5V)
=1.5V)
SC189