LT3971IDD View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3971IDD Datasheet PDF : 28 Pages
| |||
LT3971/LT3971-3.3/LT3971-5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Boost Diode Forward Voltage
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0 250 500 750 1000 1250 1500
BOOST DIODE CURRENT (mA)
3971 G22
Transient Load Response,
Load Current Stepped from
0.5A to 1A
Power Good Threshold
95
94
93
92
91
90
89
88
87
86
85
–55 –25
5 35 65 95
TEMPERATURE (°C)
Transient Load Response,
Load Current Stepped from 25mA
(Burst Mode Operation) to 525mA
VOUT
100mV/DIV
IL
500mA/DIV
125 155
3971 G23
10µs/DIV
VIN = 12V, VOUT = 3.3V
COUT = 47µF
3971 G24
Switching Waveforms;
Burst Mode Operation
Switching Waveforms; Full
Frequency Continuous Operation
VOUT
100mV/
DIV
VSW
5V/DIV
VSW
5V/DIV
IL
500mA/
DIV
10µs/DIV
VIN = 12V, VOUT = 3.3V
COUT = 47µF
IL
500mA/DIV
VOUT
20mV/DIV
3971 G25
5µs/DIV
VIN = 12V, VOUT = 3.3V
ILOAD = 10mA
COUT = 22µF
IL
500mA/DIV
VOUT
20mV/DIV
3971 G26
1µs/DIV
VIN = 12V, VOUT = 3.3V
ILOAD = 1A
COUT = 22µF
3.3V Start-Up and Dropout
3.3V Start-Up and Dropout
5V Start-Up and Dropout
3971 G27
VIN
VIN
VIN
VOUT
800kHz
3kΩ LOAD
0.5s/DIV
3971 G31
VOUT
800kHz
6.7Ω LOAD
0.5s/DIV
3971 G32
VOUT
800kHz
5kΩ LOAD
0.5s/DIV
3971 G33
3971fd
7
Share Link: 