SC4508A Просмотр технического описания (PDF) - Semtech Corporation
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SC4508A Datasheet PDF : 21 Pages
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SC4508A
POWER MANAGEMENT
Absolute Maximum Rating
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not implied.
Parameter
Symbol
Maximum
Units
VDD to GND
-0.3 to 16
SS/EN to GND(1)
3.2
FB+, FB-, COMP, OSC to GND
5
VREF Current
1
Thermal Resistance, Junction to Ambient
θJA
48
Thermal Resistance, Junction to Case
θJC
3
Storage Temperature Range
TSTG
-60 to +150
Junction Temperature Range
TJ
-40 to +150
Peak IR Reflow Temperature 10 - 40s
TPKG
260
Note: (1) Voltage from internal circuitry could be higher than 3.2V. See Application Information, Soft-Start section.
V
V
V
mA
°C/W
°C/W
°C
°C
°C
Electrical Characteristics
Unless specified: VDD = 12V, VFB+ = VREF, VFB- = 0, OUT = open, CVDD = 1uF, CSS/EN = 0.1uF, COSC = 330pF. TA = TJ = -40°C to 125°C
Parameter
Test Conditions
Min
Typ
Max
Unit
Power Supply
Input Voltage Range
Quiescent Current
Operating Current
Undervoltage Lockout
SS/EN = low
SS/EN = high, No load
2.7
15
V
200
500
µA
3
mA
Start Threshold
UVLO Hysteresis
VDD rising
2.35
2.5
2.55
V
100
mV
Oscillator
Frequency Range
Frequency
Charge Current
Error Amplifier
Feedback Input Voltage
Offset Voltage
Input Bias Current
Transconductance
Output Source or Sink Current
100
1500
KHz
450
500
550
KHz
100
µA
-0.2
0.7
V
2
mV
100
300
nA
5
mS
50
100
µA
2007 Semtech Corp.
2
www.semtech.com
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