SC120(2009) Просмотр технического описания (PDF) - Semtech Corporation
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SC120 Datasheet PDF : 21 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 3.8
IN
V (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 to 4.0
OUT
Thermal Information
Thermal Resistance, Junction to Ambient(2) (°C/W) . . . . 84
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
L specified in the Electrical Characteristics section is not recommended.
IA 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.
NT 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
E Parameter
Symbol
Conditions
Min Typ Max Units
ID Input Voltage Range
F Minimum Startup Voltage
Shutdown Current
N Operating Supply Current(1)
CO Internal Oscillator Frequency
V
IN
V
IN-SU
I
SHDN
I
Q
f
OSC
0.7
I < 1mA, T = 0°C to 85°C
OUT
A
T = 25°C, V = 0V
A
EN
In PSAVE mode, non-switching, measured at OUT
3.8
0.85
0.1
1
50
1.2
V
V
μA
μA
MHz
Maximum Duty Cycle
DC
MAX
90
%
Minimum Duty Cycle
DC
MIN
15
%
Output Voltage
V
V = 0V
OUT
FB
3.3
V
Adjustable Output Voltage Range
Internal Feedback Reference
Accuracy
V
OUT_RNG
V
INT_FB
V > V + 0.3V
OUT
IN
V = 0V, (V set to 3.3V)
FB
OUT
1.8
4.0
V
-3
3
%
FB Pin Regulation Voltage
V
FB
1.182 1.200 1.218
V
FB Pin Input Current
I
FB
V = 1.2V
FB
0.1
μA
Startup Time
t
SU
1
ms
P-Channel ON Resistance
R
DSP
V = 3.3V
OUT
0.6
Ω
PRELIMINARY
3
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