SC4524B 查看數據表（PDF） - Semtech Corporation
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SC4524B Datasheet PDF : 18 Pages
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SC4524B
Absolute Maximum Ratings
Thermal Information
VIN Supply Voltage ……………………………… -0.3 to 24V
BST Voltage ……………………………………………… 40V
BST Voltage above SW …………………………………… 24V
SS Voltage ……………………………………………-0.3 to 3V
FB Voltage …………………………………………… -0.3 to VIN
SW Voltage ………………………………………… -0.6 to VIN
SW Transient Spikes (10ns Duration)……… -2.5V to VIN +1.5V
Peak IR Reflow Temperature …………………………. 260°C
ESD Protection Level(2) ………………………………… 2000V
Junction to Ambient (1) ……………………………… 36°C/W
Junction to Case (1) ………………………………… 5.5°C/W
Maximum Junction Temperature……………………… 150°C
Storage Temperature ………………………… -65 to +150°C
Lead Temperature (Soldering) 10 sec ………………… 300°C
Recommended Operating Conditions
Input Voltage Range ……………………………… 3V to 18V
Maximum Output Current ……………………………… 2A
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) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
(2) Tested according to JEDEC standard JESD22-A114-B.
Electrical Characteristics
Unless otherwise noted, VIN = 12V, VBST = 15V, VSS = 2.2V, -40°C < TA = TJ < 125°C, ROSC = 12.1kΩ.
Parameter
Conditions
Input Supply
Input Voltage Range
VIN Start Voltage
VIN Start Hysteresis
VIN Quiescent Current
VIN Quiescent Current in Shutdown
Error Amplifier
VIN Rising
VCOMP = 0 (Not Switching)
VSS/EN = 0, VIN = 12V
Feedback Voltage
Feedback Voltage Line Regulation
FB Pin Input Bias Current
Error Amplifier Transconductance
VIN = 3V to 18V
VFB = 1V, VCOMP = 0.8V
Error Amplifier Open-loop Gain
COMP Pin to Switch Current Gain
COMP Maximum Voltage
COMP Source Current
COMP Sink Current
Internal Power Switch
VFB = 0.9V
VFB = 0.8V, VCOMP = 0.8V
VFB = 1.2V, VCOMP = 0.8V
Switch Current Limit
(Note 1)
Switch Saturation Voltage
ISW = -2.6A
Min
Typ
Max Units
3
18
V
2.70
2.82
2.95
V
225
mV
2
2.6
mA
40
50
µA
0.980 1.000 1.020
V
0.005
%/V
-170
-340
nA
280
µΩ-1
60
dB
8
A/V
2.4
V
17
µA
25
2.6
3.3
4.3
A
250
400
mV
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