LTC3890EGN-1#TRPBF Linear Technology, LTC3890EGN-1#TRPBF Datasheet - Page 5

• Manufacturer Part Number: LTC3890EGN-1#TRPBF
• Description: IC BUCK SYNC ADJ DUAL 28SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3890EGN-1#TRPBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 24 V
• Frequency - Switching: 350kHz ~ 535kHz
• Voltage - Input: 4 ~ 60 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -

100mV/DIV
PULSE-SKIPPING
TYPICAL PERFORMANCE CHARACTERISTICS
COUPLED
CONTINUOUS
2A/DIV
OPERATION
V
Burst Mode
100
OUT
AC-
90
80
70
60
50
40
30
20
10
0.0001
I
FORCED
0
L
1A/DIV
MODE
MODE
Load Step
Burst Mode Operation
FIGURE 13 CIRCUIT
V
V
FIGURE 13 CIRCUIT
Efficiency and Power Loss
vs Output Current
V
V
IN
OUT
IN
OUT
PULSE-SKIPPING
LOSS
= 12V
= 12V
= 3.3V
= 3.3V
0.001
Inductor Current at Light Load
V
V
I
LOAD
IN
OUT
= 12V
CCM LOSS
OUTPUT CURRENT (A)
= 3.3V
= 200μA
BURST EFFICIENCY
0.01
50μs/DIV
CCM EFFICIENCY
PULSE-SKIPPING
EFFICIENCY
5μs/DIV
0.1
BURST LOSS
1
38901 G01
38901 G04
10
10000
1000
100
10
1
0.1
38901 G07
100mV/DIV
COUPLED
2A/DIV
V
OUT
AC-
100
90
80
70
60
50
40
30
20
10
0.0001
I
L
0
Load Step
Pulse-Skipping Mode
Soft Start-Up
Efficiency vs Output Current
V
V
FIGURE 13 CIRCUIT
FIGURE 13 CIRCUIT
FIGURE 13 CIRCUIT
Burst Mode OPERATION
IN
OUT
V
V
IN
OUT
= 12V
= 12V
= 3.3V
0.001
= 8.5V
OUTPUT CURRENT (A)
2V/DIV
V
OUT2
0.01
50μs/DIV
2ms/DIV
V
OUT
= 3.3V
0.1
2V/DIV
V
OUT1
1
38901 G05
38901 G02
38901 G08
10
100mV/DIV
COUPLED
2A/DIV
V
100
OUT
AC-
98
96
94
92
90
88
86
84
82
80
I
L
0
Efficiency vs Input Voltage
FIGURE 13 CIRCUIT
Load Step
Forced Continuous Mode
Tracking Start-Up
FIGURE 13 CIRCUIT
V
V
FIGURE 13 CIRCUIT
I
IN
OUT
LOAD
5
= 12V
= 3.3V
10
= 2A
V
OUT1
15
LTC3890-1
INPUT VOLTAGE (V)
20
2V/DIV
V
= 3.3V
OUT2
25
50μs/DIV
2ms/DIV
30 35 40 45 50 55 60
V
OUT2
2V/DIV
V
OUT1
= 8.5V
38901fa
38901 G03
38901 G09
5
38901 G06