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LTC3862HGN-PBF Datasheet(PDF) 3 Page - Linear Technology

Part # LTC3862HGN-PBF
Description  Multi-Phase Current Mode Step-Up DC/DC Controller
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3862HGN-PBF Datasheet(HTML) 3 Page - Linear Technology

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LTC3862
3
3862fb
ELECTRICAL CHARACTERISTICS (Notes 2, 3) The l denotes the specifications which apply over the full
operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, RUN = 2V and SS = open, unless
otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Input and INTVCC Linear Regulator
VIN
VIN Supply Voltage Range
4
36
V
IVIN
VIN Supply Current
Normal Mode, No Switching
Shutdown
(Note 5)
VRUN = 0V
l
l
1.8
30
3.0
80
mA
μA
INTVCC
LDO Regulator Output Voltage
4.8
5.0
5.2
V
dVINTVCC(LINE)
Line Regulation
6V < VIN < 36V
0.002
0.02
%/V
dVINTVCC(LOAD) Load Regulation
Load = 0mA to 20mA
–2
%
VUVLO
INTVCC UVLO Voltage
Rising INTVCC
Falling INTVCC
3.3
2.9
V
V
3V8
LDO Regulator Output Voltage
3.8
V
Switcher Control Loop
VFB
Reference Voltage
VITH = 0.8V (Note 6)
E-Grade (Note 3)
I-Grade and H-Grade (Note 3)
l
l
1.210
1.199
1.223
1.223
1.235
1.248
V
V
dVFB/dVIN
Feedback Voltage VIN Line Regulation
VIN = 4V to 36V (Note 6)
±0.002
0.01
%/V
dVFB/dVITH
Feedback Voltage Load Regulation
VITH = 0.5V to 1.2V (Note 6)
0.01
0.1
%
gm
Transconductance Amplifier Gain
VITH = 0.8V (Note 6), ITH Pin Load = ±5μA
660
μMho
f0dB
Error Amplifier Unity-Gain Crossover
Frequency
(Note 7)
1.8
MHz
VITH
Error Amplifier Maximum Output Voltage
(Internally Clamped)
VFB = 1V, No Load
2.7
V
Error Amplifier Minimum Output Voltage
VFB = 1.5V, No Load
50
mV
IITH
Error Amplifier Output Source Current
–30
μA
Error Amplifier Output Sink Current
30
μA
IFB
Error Amplifier Input Bias Currents
(Note 6)
–50
–200
nA
VITH(PSKIP)
Pulse Skip Mode Operation ITH Pin Voltage
Rising ITH Voltage (Note 6)
Hysteresis
0.275
25
V
mV
ISENSE(ON)
SENSE Pin Current
0.01
2
μA
VSENSE(MAX)
Maximum Current Sense Input Threshold
VSLOPE = Float, Low Duty Cycle
(Note 3)
l
65
60
75
75
85
90
mV
mV
VSENSE(MATCH)
CH1 to CH2 Maximum Current Sense
Threshold Matching
VSLOPE = Float, Low Duty Cycle (Note 3)
(VSENSE1 – VSENSE2)
l
–10
10
mV
RUN/Soft-Start
IRUN
RUN Source Current
VRUN = 0V
VRUN = 1.5V
–0.5
–5
μA
μA
VRUN
High Level RUN Channel Enable Threshold
1.22
V
VRUNHYS
RUN Threshold Hysteresis
80
mV
ISS
SS Pull-Up Current
VSS = 0V
–5
μA
RSS
SS Pull-Down Resistance
VRUN = 0V
10
Oscillator
fOSC
Oscillator Frequency
RFREQ = 45.6k
RFREQ = 45.6k
l
280
260
300
300
320
340
kHz
kHz
Oscillator Frequency Range
l
75
500
kHz
VFREQ
Nominal FREQ Pin Voltage
RFREQ = 45.6k
1.223
V


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