Datasheet

LT8614
7
Rev. E
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
RT Programmed Switching
Frequency
V
IN
UVLO
Bias Pin Current
Bias Pin Current
Switching Waveforms, Full
Frequency Continuous Operation
Transient Response; Load Current
Stepped from 1A to 2A
Transient Response; Load Current
Stepped from 100mA (Burst Mode
Operation) to 1.1A
Switching Waveforms, Burst
Mode Operation
Switching Waveforms
SWITCHING FREQUENCY (MHz)
0.2
RT PIN RESISTOR (kΩ)
150
200
250
1.8
8614 G27
100
50
125
175
225
75
25
0
0.6
1
1.4
2.2 2.6 3
TEMPERATURE (°C)
–55
INPUT VOLTAGE (V)
3.4
35
8614 G29
2.8
2.4
–25 5 65
2.2
2.0
3.6
3.2
3.0
2.6
95 125 155
INPUT VOLTAGE (V)
5
BIAS PIN CURRENT (mA)
4.0
5.0
45
8614 G30
3.0
15
25
35
10
20
30
40
6.0
3.5
4.5
2.5
5.5
V
BIAS
= 5V
V
OUT
= 5V
I
LOAD
= 1A
f
SW
= 700kHz
SWITCHING FREQUENCY (MHz)
0.2
8
10
14
1.4 2.2
8614 G31
6
4
0.6 1
1.8 2.6 3
2
0
12
BIAS PIN CURRENT (mA)
V
BIAS
= 5V
V
OUT
= 5V
V
IN
= 12V
I
LOAD
= 1A
I
L
500mA/DIV
V
SW
5V/DIV
V
OUT
5mV/DIV
500ns/DIV
FRONT PAGE APPLICATION
12V
IN
TO 5V
OUT
AT 1A
8614 G32
I
L
500mA/DIV
V
SW
5V/DIV
V
OUT
10mV/DIV
5µs/DIV
FRONT PAGE APPLICATION
12V
IN
TO 5V
OUT
AT 10mA
V
SYNC
= 0V
8614 G33
I
L
500mA/DIV
V
SW
5V/DIV
200ns/DIV
FRONT PAGE APPLICATION
36V
IN
TO 5V
OUT
AT 1A
8614 G34
I
LOAD
1A/DIV
V
OUT
100mV/DIV
50µs/DIV
FRONT PAGE APPLICATION
1A TO 2A TRANSIENT
12V
IN
, 5V
OUT
C
OUT
= 47µF
8614 G35
I
LOAD
1A/DIV
V
OUT
200mV/DIV
50µs/DIV
FRONT PAGE APPLICATION
100mA (Burst Mode OPERATION) TO
1.1A TRANSIENT
12V
IN
, 5V
OUT
C
OUT
= 47µF
8614 G36
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