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LTC3860 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC3860
Description  Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Current Sharing
PDF  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3860 Datasheet(HTML) 3 Page - Linear Technology

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LTC3860

3860f
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TJ = 25°C. VCC = 5V, VRUN1,2 = 5V, VFREQ = VCLKIN = 0V, VFB = 0.6V, fOSC = 0.6MHz
unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tSS(INTERNAL)
Internal Soft-Start Time
2
ms
VFB
Regulated Feedback Voltage
0°C to 85°C TJ
–40°C to 125°C TJ
l
595.5
594
600
600
604.5
606
mV
mV
∆VFB/∆VCC
Regulated Feedback Voltage Line
Dependence
3.0V < VCC < 5.5V
0.05
0.2
%/V
ILIMIT
ILIM Pin Output Current
VILIM = 0.8V
18
20
22
µA
Power Good
VFB(OV)
PGOOD/VFB Overvoltage Threshold
VFB Falling
VFB Rising
650
645
660
670
mV
mV
VFB(UV)
PGOOD/VFB Undervoltage Threshold
VFB Falling
VFB Rising
530
540
555
550
mV
mV
VPGOOD(ON)
PGOOD Pull-Down Resistance
15
60
Ω
Error Amplifier
IFB
FB Pin Input Current
VFB = 600mV
–100
100
nA
IOUT
COMP Pin Output Current
Sourcing
Sinking
1
5
mA
mA
AV(OL)
Open-Loop Voltage Gain
75
dB
SR
Slew Rate
45
V/µs
f0dB
COMP Unity-Gain Bandwidth
20
MHz
Differential Amplifier
AV
Diffierential Amplifier Voltage Gain
VVSNSN = 0V
l
1.005
1
0.995
V/V
VOS
Input Referred Offset
VVSNSN = 0V
–2
2
mV
SR
Slew Rate
45
V/µs
f0dB
Bandwidth
20
MHz
VOUT(MAX)
Maximum Output Voltage
4
V
Current Sense Amplifier
VISENSE(MAX)
Maximum Differential Current Sense
Voltage (VISNSP-VISNSN)
50
mV
AV(ISENSE)
Voltage Gain
18.5
V/V
VCM(ISENSE)
Input Common Mode Range
–0.3
VCC + 0.1
V
IISENSE
SENSE Pin Input Current
VCM = 1.5V
100
nA
VMM
Current Sense Mismatch
Channel 1 to Channel 2
l
–2.75
2.75
mV
Oscillator and Phase-Locked Loop
fOSC
Oscillator Frequency
VCLKIN = 0V
VFREQ = 0V
VFREQ = 5V
l
l
360
540
400
600
440
660
kHz
kHz
VCLKIN = 5V
RFREQ < 24.9k
RFREQ = 30.1k
RFREQ = 54.9k
RFREQ = 75.0k
200
300
800
1.2
kHz
kHz
kHz
MHz
Maximum Frequency
Minimum Frequency
1.25
0.25
MHz
MHz
IFREQ
FREQ Pin Output Current
VFREQ = 0.8V
19
20
21
µA
tCLKIN(HI)
CLKIN Pulse Width High
VCLKIN = 0V to 5V
100
ns



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