LTC3865EFE#TRPBF Linear Technology, LTC3865EFE#TRPBF Datasheet - Page 6

• Manufacturer Part Number: LTC3865EFE#TRPBF
• Description: IC BUCK SYNC ADJ DUAL 38TSSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3865EFE#TRPBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.6 ~ 5 V
• Frequency - Switching: 250kHz ~ 770kHz
• Voltage - Input: 4.5 ~ 38 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 38-TSSOP Exposed Pad, 38-eTSSOP, 38-HTSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -

100mV/DIV
LTC3865/LTC3865-1
TYPICAL PERFORMANCE CHARACTERISTICS
6
SKIPPING MODE
COUPLED
CONTINUOUS
500mA
5A/DIV
5A/DIV
TO 7A
100
I
OPERATION
V
Burst Mode
LOAD
90
80
70
60
50
40
30
20
10
OUT
AC-
0
0.01
FORCED
I
PULSE-
L
Effi ciency vs Load Current
5A/DIV
5A/DIV
5A/DIV
MODE
BURST
Load Step
(Burst Mode Operation)
V
V
FIGURE 16 CIRCUIT
IN
OUT
= 12V
= 1.5V
Inductor Current at Light Load
V
V
I
FIGURE 16 CIRCUIT
LOAD
IN
OUT
0.1
DCM
= 12V
LOAD CURRENT (A)
= 1.5V
= 100mA
40μs/DIV
CCM
1
V
V
FIGURE 16 CIRCUIT
IN
OUT
2μs/DIV
= 12V
= 1.5V
10
3865 G23
3865 G01
100
3865 G04
100mV/DIV
COUPLED
100
90
80
70
60
50
40
30
20
10
0
500mA
5A/DIV
5A/DIV
0.01
V
TO 7A
500mV/DIV
I
OUT
V
Effi ciency vs Load Current
LOAD
V
OUT
BURST
AC-
TRACK/SS
I
2V/DIV
1V/DIV
L
= 1.5V
RUN
V
V
FIGURE 16 CIRCUIT
Load Step
(Forced Continuous Mode)
IN
OUT
= 12V
0.1
DCM
= 1.5V
Prebiased Output at 1V
LOAD CURRENT (A)
CCM
1
40μs/DIV
V
V
FIGURE 16 CIRCUIT
IN
OUT
= 12V
40ms/DIV
= 1.2V
10
3865 G24
100
3865 G02
3865 G05
100
90
80
70
60
50
40
20
30
100mV/DIV
COUPLED
0
Effi ciency and Power Loss
vs Input Voltage
500mA
5A/DIV
5A/DIV
2V/DIV
FIGURE 16 CIRCUIT
TO 7A
RUN1
I
V
LOAD
OUT
AC-
I
L
Load Step
(Pulse-Skipping Mode)
V
V
FIGURE 16 CIRCUIT
Coincident Tracking
IN
OUT
EFFICIENCY
= 12V
INPUT VOLTAGE (V)
10
= 1.5V
POWER LOSS
40ms/DIV
40μs/DIV
20
V
V
500mV/DIV
500mV/DIV
OUT1
OUT2
1Ω LOAD
1Ω LOAD
3865 G25
30
= 1.5V
= 1.2V
3
2
0
5
4
1
3865fb
3865 G03
3865 G06