LTC3608 LINER [Linear Technology], LTC3608 Datasheet - Page 4

• Manufacturer Part Number: LTC3608
• Description: 18V, 8A Monolithic Synchronous Step-Down DC/DC Converter
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
LTC3608
TYPICAL PERFORMANCE CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: T
dissipation P
4
200mV/DIV
LTC3608: T
effective thermal conductivity test board)
θ
of the package.)
5A/DIV
5A/DIV
100
I
JC
V
90
80
70
60
50
40
30
20
10
LOAD
0
OUT
0.01
= 1°C/W (θ
I
Effi ciency vs Load Current
L
J
V
FREQ = 550kHz
IN
Transient Response
is calculated from the ambient temperature T
LOAD STEP 0A TO 8A
V
V
FCB = 0V
FIGURE 6 CIRCUIT
IN
OUT
= 12V
D
= 12V
as follows:
J
= 2.5V
= T
JC
A
LOAD CURRENT (A)
0.1
+ (P
is simulated when heat sink is applied at the bottom
D
20μs/DIV
• 29°C/W)(θ
1
JA
is simulated per JESD51-7 high
3608 G04
3608 G01
10
200mV/DIV
A
5A/DIV
5A/DIV
100
and power
I
95
90
85
80
V
LOAD
OUT
I
Effi ciency vs Input Voltage
5
L
FCB = 5V
FIGURE 6 CIRCUIT
Transient Response
V
V
FCB = INTV
FIGURE 6 CIRCUIT
IN
OUT
= 12V
= 2.5V
INPUT VOLTAGE (V)
CC
10
20μs/DIV
Note 3: The LTC3608 is tested in a feedback loop that adjusts V
achieve a specifi ed error amplifi er output voltage (I
85°C is not tested in production. This specifi cation is assured by design,
characterization, and correlation to testing at 125°C.
Note 4: The LTC3608E is guaranteed to meet performance specifi cations
from 0°C to 125°C. Specifi cations over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3608I is guaranteed
over the full –40°C to 125°C operating junction temperature range.
15
3608 G05
3610 G02
20
RUN/SS
2V/DIV
1V/DIV
5A/DIV
650
600
550
500
450
400
V
OUT
I
Frequency vs Input Voltage
5
L
FCB = 0V
FIGURE 6 CIRCUIT
Start-Up
V
V
R
FIGURE 6 CIRCUIT
IN
OUT
LOAD
= 12V
= 2.5V
= 0.5Ω
INPUT VOLTAGE (V)
10
TH
40ms/DIV
). The specifi cation at
15
FB
to
3608 G06
3608fa
3608 G03
20