SC120ULTRT Просмотр технического описания (PDF) - Semtech Corporation
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SC120ULTRT Datasheet PDF : 32 Pages
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SC120
Absolute Maximum Ratings
IN, OUT, LX, FB (V) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0
EN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (V + 0.3)
IN
ESD Protection Level(1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Recommended Operating Conditions
Ambient Temperature Range (°C). . . . . . . . . . . . -40 to +85
V (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7 to 4.5
IN
V (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 to 5.0
OUT
Thermal Information
Thermal Res. MLPD, Junction-Ambient(2) (°C/W) . . . . . . . 84
Thermal Res., SOT23, Junction -Ambient(2) (°C/W) . . . 130
Maximum Junction Temperature (°C) . . . . . . . . . . . . . . . 150
Storage Temperature Range (°C) . . . . . . . . . . . -65 to +150
Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . +260
Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not recommended.
NOTES:
(1) Tested according to JEDEC standard JESD22-A114.
(2) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
Electrical Characteristics
Unless otherwise noted V = 2.5V, C = C = 22μF, L = 4.7μH, T = -40 to +85°C. Typical values are at T = 25°C.
IN
IN
OUT
1
A
A
Parameter
Symbol
Conditions
Min Typ Max
Input Voltage Range
V
IN
0.7
4.5
Minimum Startup Voltage
V
IN-SU
I < 1mA, T = 0°C to 85°C
OUT
A
0.865
Shutdown Current
Operating Supply Current(1)
I
T = 25°C, V = 0V
SHDN
A
EN
I
In PSAVE mode, non-switching, measured at OUT
Q
0.1
1
50
Internal Oscillator Frequency
f
1.2
OSC
Maximum Duty Cycle
D
90
MAX
Minimum Duty Cycle
D
15
MIN
Output Voltage
V
V = 0V
3.3
OUT
FB
Adjustable Output Voltage Range
V
For V such that D < D < D
1.8
5.0
OUT_RNG
IN
MIN
MAX
Regulation Feedback Reference Volt-
age Accuracy (Internal or External
Programming)
V
Reg-Ref
-1.5
1.5
FB Pin Input Current
I
V = 1.2V
0.1
FB
FB
Startup Time
t
1
SU
Units
V
V
μA
μA
MHz
%
%
V
V
%
μA
ms
3
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