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SC4539
Absolute Maximum Ratings
Supply Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +20.0
LX Voltage, Output Voltage (V) . . . . . . . . . . . . . -0.3 to +45
Current Sink Voltage (V) . . . . . . . . . . . . . . . . . . . . -0.3 to +45
Enable Voltage (V) . . . . . . . . . . . . . . . . . . . . . . -0.3 to (V IN + 0.3)
Compensation Voltage (V) . . . . . . . . . . . . . . . . . . -0.3 to +2.0
Current Set Voltage (V) . . . . . . . . . . . . . . . . . . . . . . -0.3 to +2.0
ESD Protection Level (1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Recommended Operating Conditions
Supply Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8 to 5.5
Output Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 to 22
Ambient Temperature Range (°C) . . . . . . . . . . . . . -40 to +85
Thermal Information
Thermal Resistance, Junction to Ambient (2) (°C/W) . . . . . 74
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-B.
(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 IN = 3.6V, C IN = 2.2μF, C OUT = 1μF, C COMP = 47nF, R COMP = 1.27kΩ, R ISET = 5.76kΩ, L = 22μH, T A = -40 to 85oC, typical values are at T A = 25oC.
Parameter
UVLO Threshold
Symbol
V UVLO
Conditions
V IN rising
Min
2.40
Typ
2.60
Max
2.79
Units
V
UVLO Hysteresis
V UVLO-HYS
120
mV
Quiescent Supply Current
I Q
Not switching
1.8
mA
Shutdown Supply Current
I SHDN
EN tied to GND
0.1
1
μA
EN Logic High Voltage
EN Logic Low Voltage
V IN
V IL
1.80
0.8
V
V
EN Logic Input Current
Thermal Shutdown Temperature
I IL, I IH
T SD
V IN = 5.5V, V EN = 0V or 5.5V
T J rising
±0.01
155
±1
μA
°C
Thermal Shutdown Hysteresis
Boost Converter Characteristics
20
°C
Switching Frequency
Maximum Duty Cycle
Minimum On-Time
Switch Over-Current Protection
f SW
D MAX
t ON(MIN)
I OCP
V IN = 3.2V, T A = 25°C
680
92
425
800
100
920
725
kHz
%
ns
mA
3
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