SC4808B-2 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC4808B-2' PDF : 28 Pages View PDF
SC4808B-2
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless specified: VCC = 12V; CL = 100pF; TA = -40°C to 105°C
Parameter
Test Conditions
VCC Under Voltage Lockout
Start Threshold
Hysteresis
Line Under Voltage Lockout
Start Threshold
R23 = 14kΩ, R33 = 10kΩ (see page 11)
Hysteresis
R23 = 14kΩ, R33 = 10kΩ (see page 11)
Soft Start
Internal Soft Start Ramp
Soft Start Duration
Soft Start Delay
Oscillator
Oscillator Frequency
Oscillator Ramp
Rcs = 1kΩ
(See formula in the application
information section on page 18)
Rosc = 11kΩ, Cosc = 200pF
RC pin to GND capacitance
Oscillator Frequency Range
Sync/CLOCK
Clock SYNC Threshold
Sync Frequency Range
Bandgap
Reference Voltage
Reference Current
Overall
Startup Current
Operating Supply Current
VCC Zener Shunt Voltage
VCC < start threshold
FB = 0V, CS = 0V
IDD = 10mA
Min
Typ
Max
4.0
4.40
4.5
100
140
200
-3% VREF +3%
5.6% of
VREF
200
12
140
450
500
550
VREF/2
+0.25
22
50
1000
1.0
F *1.3
osc
2.970
3.125
5
3.280
150
7
16
Unit
V
mV
V
mV
µs/V
µs
µs
KHz
V
pF
KHz
V
KHz
V
mA
µA
mA
V
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