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LTC3770 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC3770
Description  Synchronous Controller with Margining, Tracking and PLL
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3770 Datasheet(HTML) 6 Page - Linear Technology

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6
LTC3770
3770f
TYPICAL PERFOR A CE CHARACTERISTICS
Transient Response
Track Down
Track Up
ITH Voltage vs Load Current
Efficiency vs Load Current
Frequency vs Input Voltage
VOUT
2V/DIV
TRACK/SS
AND VFB
500mV/DIV
250ms/DIV
3770 G13
TRACK/SS
FIGURE 12 CIRCUIT
VFB
VOUT
VOUT
2V/DIV
TRACK/SS
AND VFB
500mV/DIV
250ms/DIV
3770 G14
TRACK/SS
VFB
VOUT
FIGURE 12 CIRCUIT
VOUT
100mV/DIV
IL
5A/DIV
STEP
0A TO 10A
20µs/DIV
3770 G15
FIGURE 12 CIRCUIT
LOAD CURRENT (A)
100
90
95
85
80
75
50
55
60
65
70
0.01
1
10
3770 G16
0.1
DISCONTINUOUS
MODE
CONTINUOUS
MODE
FIGURE 12 CIRCUIT
INPUT VOLTAGE (V)
480
460
440
420
400
300
320
340
360
380
020
30
25
3770 G18
10
15
5
FCB = 0V
FIGURE 12 CIRCUIT
IOUT = 10A
IOUT = 0A
LOAD CURRENT (A)
2.5
1.5
2.0
1.0
0.5
0
08
12
10
3770 G17
46
2
DISCONTINUOUS
MODE
FIGURE 12 CIRCUIT
CONTINUOUS
MODE
Frequency vs Load Current
Efficiency vs Input Voltage
INPUT VOLTAGE (V)
100
95
90
85
80
70
75
020
30
25
3770 G19
10
15
5
FCB = 5V
FIGURE 12 CIRCUIT
ILOAD = 10A
ILOAD = 1A
LOAD CURRENT (A)
08
12
10
46
2
500
450
400
350
300
250
0
50
100
150
200
3770 G20
DISCONTINUOUS
MODE
CONTINUOUS
MODE
FIGURE 12 CIRCUIT


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