SC283 SEMTECH [Semtech Corporation], SC283 Datasheet - Page 5

• Manufacturer Part Number: SC283
• Description: Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator
• Manufacturer: SEMTECH [Semtech Corporation]

Typical Characteristics
Circuit Conditions: C
© 2010 Semtech Corp.
-0.2%
-0.4%
-0.6%
-0.8%
-1.0%
100%
-0.2%
-0.4%
-0.6%
-0.8%
-1.0%
1.0%
0.8%
0.6%
0.4%
0.2%
0.0%
1.0%
0.8%
0.6%
0.4%
0.2%
0.0%
95%
90%
85%
80%
75%
70%
65%
60%
-40
0.0
0.0
I
OUT
UVLO Rising Threshold Variation
T
T
A
A
=25° C
= 0A
=25° C
Efficiency vs. Load Current
V
0.3
0.3
IN
IN
-15
=3.3V;V
= 10uF/6.3V; C
UVLO Rising Threshold Variation
V
IN
Load Regulation
=3.3V;V
Ambient Temperature (° C)
0.6
OUT
0.6
Load Regulation
=1.5V
Output Current (A)
Output Current (A)
OUT
Efficiency
10
V
=1.5V
IN
OUT
=5.0V;V
0.9
0.9
= 22uF/6.3V, Unless otherwise noted, L= 2.2uH (TOKO: 1127AS-2R2M).
V
V
35
IN
V
OUT
IN
=5.0V;V
IN
=5.0V;V
=5.0V;V
=3.3V
1.2
1.2
OUT
OUT
OUT
60
=3.3V
=1.5V
1.5
=1.5V
1.5
1.8
1.8
85
5
Dropout Voltage in 100% Duty Cycle Operation
1000
-1%
-2%
-3%
-4%
-5%
800
600
400
200
5%
4%
3%
2%
1%
0%
500
450
400
350
300
250
200
150
100
50
0
0
Total Loss (Per Channel) vs. Load Current
-40
0.0
0.0
T
I
T
OUT
A
L= 1071AS-2R2M
(DCR= 60m_max)
A
= 25° C
=25° C
Dropout Voltage of 100% Duty Cycle Operation
= 0A
UVLO Hysteresis Variation
0.3
0.3
-15
UVLO Hysteresis Variation
V
Ambient Temperature (° C)
IN
0.6
0.6
=3.3V;V
Output Current (A)
Output Current (A)
Total Loss
10
V
IN
=5.0V;V
OUT
0.9
0.9
V
=1.5V
IN
L= 1127AS-2R2M
(DCR=48m_max)
=5.0V;V
35
OUT
=3.3V
1.2
1.2
OUT
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=1.5V
60
SC283
1.5
1.5
1.8
1.8
85