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LTC3864 Datasheet(PDF) 8 Page - Linear Technology

Part # LTC3864
Description  60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3864 Datasheet(HTML) 8 Page - Linear Technology

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LTC3892/
LTC3892-1/LTC3892-2
8
38921fc
For more information www.linear.com/LTC3892
DRVCC and EXTVCC
vs Load Current
EXTVCC Switchover and DRVCC
Voltages vs Temperature
Undervoltage Lockout
Threshold vs Temperature
LOAD CURRENT (mA)
0
6.4
5.6
4.8
6
5.2
4.4
6.2
5.4
4.6
5.8
5
4.2
4
150
75
25
125
50
100
3892 G10
EXTVCC = 0V
EXTVCC = 8.5V
VIN = 12V
DRVSET = GND
EXTVCC = 5V
TEMPERATURE (°C)
–75
11
10
8
7
5
9
6
4
3892 G11
150
125
25
0
–50
75 100
–25
50
DRVCC (DRVSET = INTVCC)
EXTVCC RISING
EXTVCC FALLING
EXTVCC RISING
EXTVCC FALLING
DRVCC (DRVSET = 0V)
DRVUV = INTVCC
DRVUV = GND
TEMPERATURE (°C)
–75
8
7.5
5.5
4.5
6.5
3.5
3
7
5
6
4
3892 G12
150
125
25
0
–50
75 100
–25
50
RISING
FALLING
RISING
FALLING
DRVUV = INTVCC
DRVUV = GND
TYPICAL PERFORMANCE CHARACTERISTICS
Inductor Current at Light Load
Soft Start-Up
Regulated Feedback Voltage vs
Temperature
2µs/DIV
FORCED
CONTINUOUS
MODE
Burst Mode
OPERATION
1A/DIV
PULSE
SKIPPING
MODE
3892 G07
VIN = 12V
VOUT = 5V
ILOAD = 1mA
FIGURE 13 CIRCUIT
2ms/DIV
RUN1, 2
5V/DIV
VOUT2
2V/DIV
VOUT1
2V/DIV
3892 G08
FIGURE 13 CIRCUIT
TEMPERATURE (°C)
-75
808
806
802
800
796
804
798
794
792
3892 G09
150
50
0
-50
100 125
25
-25
75


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