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LT3510 Datasheet(PDF) 3 Page - Linear Technology

Part # LT3510
Description  Monolithic Dual Tracking 2A Step-Down Switching
PDF  30 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3510 Datasheet(HTML) 3 Page - Linear Technology

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LT3510
3
3510fe
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Feedback Voltage Line Regulation
VVIN1/2 = 3V to 25V
l
–1
0
1
%
Feedback Voltage Offset Ch 1 to Ch 2
VVC1/2 = 1V
l
–16
0
16
mV
Feedback Bias Current Ch 1/Ch 2
VFB1/2 = 0.8V, VVC1/2 = 1V
l
–200
75
200
nA
Error Amplifier gm Ch 1/Ch 2
VVC1/2 = 1V, IVC1/2 = ±5μA
l
150
275
450
μmho
Error Amplifier Gain Ch 1/Ch 2
1000
V/V
Error Amplifier to Switch Gain Ch 1/Ch 2
2.2
A/V
Error Amplifier Source Current Ch 1/Ch 2
VFB1/2 = 0.6V, VVC1/2 = 1V
10
15
25
μA
Error Amplifier Sink Current Ch 1/Ch 2
VFB1/2 = 1V, VVC1/2 = 1V
15
20
30
μA
Error Amplifier High Clamp Ch 1/Ch 2
VFB1/2 = 0.7V
1.75
2.0
2.25
V
Error Amplifier Switching Threshold Ch 1/Ch 2
VOUT1/2 = 5V, RT/SYNC = 133k
0.5
0.7
1.0
V
Soft-Start Source Current Ch 1/Ch 2
VFB1/2 = 0.6V, VSS1/2 = 0.4V
l
2
3
4.2
μA
Soft-Start VOH Ch 1/Ch 2
VFB1/2 = 0.9V
1.9
2
2.4
V
Soft-Start Sink Current Ch 1/Ch 2
VFB1/2 = 0.6V, VSS1/2 = 1V
200
600
1000
μA
Soft-Start VOL Ch 1/Ch 2
VFB1/2 = 0V
50
80
125
mV
Soft-Start to Feedback Offset Ch 1/Ch 2
VVC1/2 = 1V, VSS1/2 = 0.4V
l
–16
0
16
mV
Soft-Start Sink Current Ch 1/Ch 2 POR
VSS1/2 = 0.4V (Note 4), VVC = 1V
0.5
1.5
2
mA
Soft-Start POR Threshold Ch 1/Ch 2
VFB1/2 = 0V (Note 4)
55
80
105
mV
Soft-Start Switching Threshold Ch 1/Ch 2
VFB1/2 = 0V
30
50
70
mV
Power Good Leakage Ch 1/Ch 2
VFB1/2 = 0.9V, VPG1/2 = 25V, VVIN1/2 = 25V, VOUT = 5V
0
1
μA
Power Good Threshold Ch 1/Ch 2
VFB1/2 Rising, PG1/2 = 20k to 5V
l
87
90
93
%
Power Good Hysteresis Ch 1/Ch 2
VFB1/2 Falling, PG1/2 = 20k to 5V
20
30
50
mV
Power Good Sink Current Ch 1/Ch 2
VFB1/2 = 0.65V, VPG1/2 = 0.4V
400
800
1200
μA
Power Good Shutdown Sink Current Ch 1/Ch 2
VVIN1/2 = 2V, VFB1/2 = 0V, VPG1/2 = 0.4V
10
50
100
μA
RT/SYNC Reference Voltage
VFB1/2 = 0.9V, IRT/SYNC = –40μA
0.93
0.975
1
V
Switching Frequency
RT/SYNC = 133k, VFB1/2 = 0.6V, VBST1/2 = VSW + 3V
RT/SYNC = 15.4k, VFB1/2 = 0.6V, VBST1/2 = VSW + 3V
200
1.2
250
1.5
300
1.8
kHz
MHz
Switching Phase Angle Ch A to Ch B
RT/SYNC = 133k, VFB1/2 = 0.6V, VBST1/2 = VSW + 3V
120
180
210
Deg
Minimum Boost for 100% Duty Cycle Ch 1/Ch 2
VFB1/2 = 0.7V, IRT/SYNC = –35μA (Note 5), VOUT = 0V
1.7
2
V
SYNC Frequency Range
VBST1/2 = VSW + 3V
250
1500
kHz
SYNC Switching Phase Angle Ch A to Ch B
SYNC = 250kHz, VBST1/2 = VSW + 3V
120
180
210
Deg
IND + VOUT Current Ch 1/Ch 2
VVOUT1/2 = 0V, VFB1/2 = 0.9V
VVOUT1/2 = 5V
40
70
0
100
1
μA
μA
IND to VOUT Maximum Current Ch 1/Ch 2
VVOUT1/2 = 0.5V (Note 6), VFB1/2 = 0.7V, VBST1/2 = 20V
VVOUT1/2 = 5V (Note 6), RT/SYNC = 133k, VBST1/2 = 20V
2.25
2.5
2.8
2.8
4
4
A
A
Switch Leakage Current Ch 1/Ch 2
VSW1/2 = 0V, VVIN1/2 = 25V
l
050
μA
Switch Saturation Voltage Ch 1/Ch 2
ISW1/2 = 2A, VBST1/2 = 20V, VFB1/2 = 0.7V
l
250
400
mV
Boost Current Ch 1/Ch 2
ISW1/2 = 2A, VBST1/2 = 20V, VFB1/2 = 0.7V
25
50
100
mA
Minimum Boost Voltage Ch 1/Ch 2
ISW1/2 = 2A, VBST1/2 = 20V, VFB1/2 = 0.7V (Note 7)
1.4
2.5
V
Note 2: The LT3510EFE is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
The
l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TJ = 25°C. VVIN1/2 = 15V, VBST1/2 = open, VRT/SYNC = 2V, VVOUT1/2 = open,
unless otherwise specified.



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