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LTC3124 Datasheet(PDF) 3 Page - Analog Devices

Part # LTC3124
Description  26V, 9A Low-IQ CC/CV Monolithic Buck-Boost Converter
PDF  36 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC3124 Datasheet(HTML) 3 Page - Analog Devices

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LT3120
3
Rev. 0
For more information www.analog.com
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating
temperature range, otherwise specifications are at TA = 25°C. VIN = PVIN = 12V, PVOUT = 5V unless otherwise stated.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Operating Voltage
After Start-Up (Note 4)
l
2.5
0.5
26
26
V
V
Output Operating Range
l
0.8
24
V
VCC Undervoltage Lockout Threshold
VCC Rising
VCC Falling
l
l
2.2
2.35
2.25
2.4
V
V
VCC Undervoltage Lockout Hysteresis
100
mV
Input Current in Shutdown
EN/UVLO = 0V
3
µA
Input Current in Sleep
FB = 0.9V
30
µA
Oscillator Frequency
RT = 76.8kΩ
l
900
1000
1100
kHz
Oscillator Frequency Range
l
400
2000
kHz
SYNC/MODE Frequency Range
l
400
2000
kHz
SYNC/MODE Logic Threshold
l
0.3
0.7
1.1
V
SYNC/MODE Minimum Pulse Width
Minimum Low or High Duration
100
ns
Soft-Start Duration
6
ms
Feedback Voltage
l
787
779
795
795
803
811
V
V
FB Pin Input Current
1
50
nA
Error Amplifier Transconductance
120
µs
EN/UVLO Pin Input Logic Threshold
l
0.3
0.8
1.0
V
EN/UVLO Pin Comparator Threshold
Rising
Rising, –40°C ≤ TJ ≤ 125°C
l
1.169
1.169
1.205
1.258
1.241
V
V
EN/UVLO Pin Hysteresis Current
250
nA
EN/UVLO Pin Hysteresis Voltage
90
mV
PROG Pin Current
VISP – VISN = 25mV
VISP – VISN = 10mV
47.5
18
50
20
52.5
22
µA
µA
PROG Pin Threshold
l
779
795
811
V
MPPC Pin Threshold
l
774
795
822
V
PGOOD Threshold
Percent of FB Voltage Falling
l
–9.5
–8
–6.5
%
PGOOD Hysteresis
Percent of FB Voltage
1.2
%
PGOOD Pull-Down Resistance
100
250
Ω
PGOOD Leakage
VPGOOD = 24V
1
40
nA
Inductor Current Limit
Limit on Average (Not Peak) Inductor Current
l
8.25
9.5
A
Burst Mode Inductor Current Limit
Limit on Average (Not Peak) Inductor Current
1
A
Maximum Duty Cycle
Percentage of Period SW2 is Low in Boost Mode,
RT = 76.8kΩ (Note 4)
l
91
95
%
SW1, SW2 Minimum Low Time
(Note 4)
70
ns



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