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LTC3835EGN-1 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3835EGN-1
Description  Low IQ Synchronous Step-Down Controller
Download  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3835EGN-1 Datasheet(HTML) 5 Page - Linear Technology

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background image
LTC3835-1
5
38351fc
TYPICAL PERFORMANCE CHARACTERISTICS
Inductor Current at Light Load
Soft Start-Up
Tracking Start-Up
Total Input Supply Current
vs Input Voltage
EXTVCC Switchover and INTVCC
Voltages vs Temperature
INTVCC Line Regulation
Maximum Current Sense Voltage
vs ITH Voltage
Sense Pins Total Input
Bias Current
Maximum Current Sense Threshold
vs Duty Cycle
TA = 25°C, unless otherwise noted.
4μs/DIV
PULSE-
SKIPPING
MODE
38351 G07
2A/DIV
Burst Mode
OPERATION
FORCED
CONTIN-
UOUS
MODE
20ms/DIV
38351 G08
VOUT
1V/DIV
20ms/DIV
38351 G09
VOUT2
2V/DIV
VOUT1
2V/DIV
(SLAVE)
(MASTER)
FIGURE 10 CIRCUIT
VOUT = 3.3V
ILOAD = 300μA
FIGURE 10 CIRCUIT
FIGURE 10 CIRCUIT
INPUT VOLTAGE (V)
5
350
300
250
200
150
100
50
0
20
30
38351 G10
10
15
25
35
300μA LOAD
NO LOAD
TEMPERATURE (°C)
–45
4.0
4.2
4.6
4.8
5.0
6.0
5.4
–5
35
55
38351 G11
4.4
5.6
5.8
5.2
–25
15
75
95
EXTVCC FALLING
EXTVCC RISING
INTVCC
INPUT VOLTAGE (V)
0
5.00
5.05
5.15
5.20
5.25
5.50
5.35
10
20
25
38351 G12
5.10
5.40
5.45
5.30
515
30
35
40
ITH PIN VOLTAGE (V)
0
40
60
100
0.6
1.0
38351 G13
20
0
0.2
0.4
0.8
1.2
1.4
–20
–40
80
PULSE SKIPPING
FORCED CONTINUOUS
BURST MODE (RISING)
BURST MODE (FALLING)
10% DUTY CYCLE
VSENSE COMMON MODE VOLTAGE (V)
0
–700
–600
–400
–300
–200
6789
200
38351 G14
–500
12345
10
–100
0
100
DUTY CYCLE (%)
0
40
80
120
20
60
100
20
40
60
80
38351 G15
100
10
030
50
70
90


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