SC121ULTRT Semtech, SC121ULTRT Datasheet - Page 13

• Manufacturer Part Number: SC121ULTRT
• Description: IC BOOST SYNC 1.2A MLPD-6
• Manufacturer: Semtech
• Type: Step-Up (Boost)r

Specifications of SC121ULTRT

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 3.3V, 1.8 ~ 5 V
• Current - Output: 1.2A
• Frequency - Switching: 1.2MHz
• Voltage - Input: 0.7 ~ 4.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-MLPD-UT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: SC121ULTRTTR

Typical Characteristics (continued)
Min. Start-up Voltage vs. Temperature (Any V
(100mA/div)
0.75
0.65
0.85
(10mV/div)
100
0.8
0.7
0.6
0.9
V
80
60
40
20
0
OUT
Startup Max Load Current vs. V
(5V/div)
0.5
-40
V
ripple
R
OUT
1
V
= 931k Ω , R
LX
= 3.3V, I
I
L
V
1
-20
OUT
= 3.3V, V
OUT
T
A
1.5
= 1mA
2
= 85°C
= 294k Ω , L = 4.7 μ H, C
0
IN
= 1.5V, I
PWM Operation
2
Temperature (°C)
Time = (400ns/div)
20
OUT
V
T
= 50mA
IN
A
2.5
= 25°C
(V)
T
A
40
= –40°C
FB
3
= 22pF
IN
60
(Any V
3.5
80
OUT
4
)
OUT
100
4.5
)
I
OUT
(100mV/div)
AC Coupled
(50mA/div)
= 40mA to
160
140
120
100
80
60
40
20
0
140mA
0.5
R
Startup Min Load Res. vs. V
V
1
OUT
= 931k Ω , R
V
1
OUT
= 3.3V, V
T
A
T
A
= 85°C
= –40°C
1.5
2
= 294k Ω , L = 4.7 μ H, C
IN
= 1.5V, T
T
A
= 25°C
Load Transient
2
Time = (100μs/div)
A
=25°C
V
IN
2.5
(V)
FB
3
IN
= 22pF
(Any V
3.5
OUT
SC121
4
)
4.5
13