SC4508 Ver la hoja de datos (PDF) - Semtech Corporation
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SC4508 Datasheet PDF : 10 Pages
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SC4508
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. Exposure to Absolute Maximum rated conditions for extended periods of time may
affect device reliability.
Parameter
Symbol
Maximum
Units
VDD to GND
-0.3 to 16
V
SS/SHDN to GND
3.2
V
FB+, FB-, COMP, OSC to GND
5
V
VREF Current
1
mA
OUT Source or Sink
250
mA
Thermal Resistance, Junction to Ambient
θJA
Thermal Resistance, Junction to Case
θJC
Storage Temperature Range
TSTG
Junction Temperature Range
TJ
Peak IR Reflow Temperature 10 - 40s
TPKG
48
3
-60 to +150
-40 to +150
260
°C/W
°C/W
°C
°C
°C
Electrical Characteristics
Unless specified: VDD = 2.7V to 15V , TA = TJ = -40°C to 125°C
Parameter
Test Conditions
Min
Typ
Max
Unit
Power Supply
Input Voltage Range
2.7
15
V
Quiescent Current
SHDN = low
200
500
µA
Operating Current
SHDN = high, No load
3
mA
Undervoltage Lockout
Start Threshold
UVLO Hysteresis
VDD rising
2.5
2.55
V
100
mV
Oscillator
Frequency Range
100
1500
KHz
Frequency
Charge Current
CT = 300pF
450
500
550
KHz
100
µA
Error Amplifier
Feedback Input Voltage
0.75
V
Input Bias Current
100
nA
Transconductance
5
mS
Output Source or Sink Current
50
100
µA
2004 Semtech Corp.
2
www.semtech.com
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