POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless specified: TA = 25oC, 5VSBY = 5V.
Parameter
Symbol
Switcher
Load Regulation
Oscillator Frequency
fOSC
Soft Start Current
ISS
Maximum Duty Cycle
Overcurrent Trip Voltage
Top Gate Rise Time
Top Gate Fall Time
Bottom Gate Rise Time
Bottom Gate Fall Time
Dead Time
Error Amplifier Transconductance
Error Amplifier Gain @ DC
Error Amplifier Bandwidth
Error Amplifier Source Current
VTRIP
TGR
TGF
BG
R
BG
F
t
d
Gm
AEA
GBW
Error Amplifier Sink Current
Internal Ramp
VTT LDO
VRAMP
Output Voltage
Source and Sink Currents
Source and Sink Currents
Load Regulation
Error Amplifier Gain
Current Limit
VTT
IVTT
IVTT
∆VTT/ ∆I
AEA_VTT
VTTILIM
Conditions
IVDDQ = 0A to 10A
VSS = 800mV
% of VDDQ Setpoint
Gate capacitance = 4000pF
Gate capacitance = 4000pF
Gate capacitance = 4000pF
Gate capacitance = 4000pF
RCOMP = open
FB = 0 , COMP = 1V
FB = 1.5V , COMP = 1V
Peak - to - Peak
VVDDQ = 2.500V
VVDDQ = 2.500V
VVDDQ = 1.500V
IVTT =+1.8A to -1.8A
BF_CUT = low
SC2516
Min Typ Max Units
0.2
%
225 250 275 KHz
20 25 30 u A
75 80 %
70 75 80 %
25
nS
25
nS
35
nS
35
nS
20 50 80 nS
0.8
1 1.2 mS
38
dB
5
MHz
55 70 85 u A
70 90 110 u A
0.55
V
1.235 1.250 1.265 V
-1.8
+1.8 A
-1.4
+1.4 A
-1
+1 %
75
dB
3
A
© 2005 Semtech Corp.
3
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