LTC3802_15 Datasheet, PDF (3/28 Pages) Linear Technology – Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking

LTC3802
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range. (Note 3) V_CC = PV_CC = BOOST = 5V, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
I_PVCC
PV_CC Supply Current
I_BOOST
BOOST Pin Current
Switcher Control Loop
V_FB = V_CMPIN = 0V, No Load
V_RUN/SS = 0V (Notes 5, 6)
V_FB = V_CMPIN = 0V, No Load
V_RUN/SS = 0V (Notes 5, 6)
2
mA
1
10
µA
1
mA
1
10
µA
V_FB
∆V_FB
∆V_OUT
A_ERR
GBW
Feedback Voltage
Feedback Voltage V_CC Line Regulation
Output Voltage Load Regulation
Error AMP DC Gain
Error AMP Gain Bandwidth Product
V_EXTREF = 5V, 0°C ≤ T ≤ 70°C
V_EXTREF = 5V
V_CC = 4.5V to 6V
(Note 7)
No Load, V_EXTREF = V_RUN/SS = V_CC
f = 100kHz (Note 7)
0.594 0.600 0.606
V
q 0.591 0.600 0.609
V
±0.01
%/V
0.1
±0.2
%
q 70
80
dB
10
MHz
I_COMP
I_FB
I_CMPIN
I_FBT
I_EXTREF
V_EXTREF
A_LFF
R_VINFF
V_PGOOD
Error AMP Output Sink/Source Current
Voltage Feedback Input Current
Comparators Input Current
FBT Input Current
EXTREF Input Current
External Reference Not to Affect V_FB
∆ Drop in Duty Cycle/∆ V_INFF
V_INFF Input Resistance
Positive Power Good Threshold
Negative Power Good Threshold
V_RUN/SS = V_CC
V_FB = 0V to 1V
V_CMPIN = 0V to 1V
V_FBT = 0V to 1V
V_EXTREF = 0V to 5V
V_VINFF = 5V to 30V
With Respect to 0.6V
With Respect to 0.6V
±12
mA
q
±1
µA
q
±1
µA
q
±1
µA
q
±1
µA
q1
V
2.3
%/V
1
MΩ
q
5
10
15
%
q –5
–10 –15
%
V_OVP
V_BURRS
Overvoltage Threshold
(V_CMPIN – V_FB) to Reset
Burst Mode Operation
With Respect to V_FB
3
5
9
%
15
mV
–12
mV
V_SAW
I_IMAX
SAW Before Line Compensation
I_MAX Source Current
V_IMAX = 1V
1.2
V
–9.0 –10 –11.0
µA
q –8.5 –10 –11.5
µA
I_LIM(TH)
I_LIM Comparator Offset
V_IMAX/I_LIM Threshold
Hard I_LIM/I_LIM Threshold
I_SS
RUN/SS Source Current
RUN/SS Sink/Source Current Ratio
RUN/SS Sink Current, I_LIM
RUN/SS Sink Current, Hard I_LIM
V_SHDN
RUN/SS Shutdown Threshold
LOGIC and PGOOD
V_CMPIN = 0V
V_CMPIN = V_FBT = 0.6V, V_PHASEMD = V_CC
V_CMPIN = V_FBT = 0.6V, V_PHASEMD = 0V
V_CMPIN = V_FBT = 0.6V
V_CMPIN = V_FBT = 0V
RUN/SS↑
q –15
0
15
mV
5
V/V
1.5
V/V
–5
–7
–9
µA
1.5
2
2.5 µA/µA
100
µA
q1
mA
q 0.4
0.8
1.2
V
I_PHASEMD
V_IH
V_IL
I_PGOOD
V_OLPG
t_PGOOD
PHASEMD Pull-Up Current
PHASEMD Pull-Down Current
PLLIN, FCB High Level Input Voltage
PLLIN, FCB Low Level Input Voltage
V_PGOOD Leakage Current
V_PGOOD Output Low Voltage
V_PGOOD Falling Edge Delay
V_PGOOD Rising Edge Delay
V_PHASEMD = 0V
V_PHASEMD = 5V
Power Good
I_PGOOD = 1mA
(Note 8)
(Note 8)
–7
µA
2
µA
q 2.4
V
q
0.8
V
±1
µA
q
0.1
0.3
V
q 100
150
µs
10
µs
3802f
3