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SC121ULTRT

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23
SC121
4
Parameter Symbol Conditions Min Typ Max Units
P-Channel ON Resistance R
DSP
V
OUT
= 3.3V 0.6 Ω
N-Channel ON Resistance R
DSN
V
OUT
= 3.3V 0.5 Ω
N-Channel Current Limit I
LIM(N)
V
IN
= 3.0V 0.9 1.2 A
P-Channel Startup Current Limit I
LIM(P)-SU
V
IN
> V
OUT
, V
EN
> V
IH
150 mA
LX Leakage Current PMOS I
LXP
T
A
= 25°C, V
LX
= 0V 1 µA
LX Leakage Current NMOS I
LXN
T
A
= 25°C, V
LX
= 3.3V 1 µA
Logic Input High V
IH
V
IN
= 3.0V 0.85 V
Logic Input Low V
IL
V
IN
= 3.0V 0.2 V
Logic Input Current High I
IH
V
EN
= V
IN
= 3.0V 1 µA
Logic Input Current Low I
IL
V
EN
= 0V -0.2 µA
Electrical Characteristics (continued)
NOTES:
(1) Quiescent operating current is drawn from OUT while in regulation. The quiescent operating current projected to IN is approximately
I
Q
× (V
OUT
/V
IN
).
SC121
5
0.1 0.2 0.5 1 2 5 10 20 50 100 200
0
10
20
30
40
50
60
70
80
90
100
I
OUT
(mA)
Efficiency (%)
R
1
= 499k
Ω
, R
2
= 1M
Ω
, L = 4.7
μ
H, C
FB
= 22pF, T
A
= 25
ο
C
0.1 0.2 0.5 1 2 5 10 20 50 100 200
0
10
20
30
40
50
60
70
80
90
100
I
OUT
(mA)
Efficiency (%)
R
1
= 499k
Ω
, R
2
= 1M
Ω
, L = 4.7
μ
H, C
FB
= 22pF, V
IN
= 1.2V
Typical Characteristics — V
OUT
= 1.8V
V
IN
= 1.6V
V
IN
= 1.2V
V
IN
= 0.8V
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
0 50 100 150 200 250
1.76
1.78
1.8
1.82
I
OUT
(mA)
V
OUT
(V)
R
1
= 499k
Ω
, R
2
= 1M
Ω
, L = 4.7
μ
H, C
FB
= 22pF, T
A
= 25
ο
C
0 50 100 150 200 250
1.76
1.78
1.8
1.82
I
OUT
(mA)
V
OUT
(V)
R
1
= 499k
Ω
, R
2
= 1M
Ω
, L = 4.7
μ
H, C
FB
= 22pF, V
IN
= 1.2V
V
IN
= 1.6V
V
IN
= 1.2V
V
IN
= 0.8V
T
A
= 25°C
T
A
= –40°C
0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6
1.76
1.78
1.8
1.82
V
IN
(V)
V
OUT
(V)
R
1
= 499k
Ω
, R
2
= 1M
Ω
, L = 4.7
μ
H, C
FB
= 22pF, I
OUT
= 1mA
0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6
1.76
1.78
1.8
1.82
V
IN
(V)
V
OUT
(V)
R
1
= 499k
Ω
, R
2
= 1M
Ω
, L = 4.7
μ
H, C
FB
= 22pF, I
OUT
= 50mA
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
T
A
= 85°C
E ciency vs. I
OUT
(V
OUT
= 1.8V)
E ciency vs. I
OUT
(V
OUT
= 1.8V)
Load Regulation (V
OUT
= 1.8V)
Load Regulation (V
OUT
= 1.8V)
Line Regulation — Low Load (V
OUT
= 1.8V)
Line Regulation — High Load (V
OUT
= 1.8V)
T
A
= –40°C
T
A
= 85°C
SC121
6
-50 -25 0 25 50 75 100
1.76
1.78
1.8
1.82
Junction Temperature (
o
C)
V
OUT
(V)
R
1
= 499k
Ω
, R
2
= 1M
Ω
, L = 4.7
μ
H, C
FB
= 22pF, I
OUT
= 1mA
-50 -25 0 25 50 75 100
1.76
1.78
1.8
1.82
Junction Temperature (
o
C)
V
OUT
(V)
R
1
= 499k
Ω
, R
2
= 1M
Ω
, L = 4.7
μ
H, C
FB
= 22pF, I
OUT
= 50mA
Typical Characteristics — V
OUT
= 1.8V (continued)
V
IN
= 1.2V
V
IN
= 0.8V
V
IN
= 1.6V
V
IN
= 1.2V
V
IN
= 0.8V
Temperature Reg. — Low Load (V
OUT
= 1.8V)
Temperature Reg. — High Load (V
OUT
= 1.8V)
0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6
0
50
100
150
200
250
300
350
V
IN
(V)
I
OUT
(mA)
R
1
= 499k
Ω
, R
2
= 1M
Ω
, L = 4.7
μ
H, C
FB
= 22pF
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
Max. I
OUT
vs. V
IN
(V
OUT
= 1.8V)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23

SC121ULTRT

Mfr. #:
Buy SC121ULTRT
Manufacturer:
Semtech
Description:
Switching Voltage Regulators LOW VOLTAGE BOOST CONVRTR_PWM
Lifecycle:
New from this manufacturer.
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