LTC3114-1
4
31141fb
For more information www.linear.com/LTC3114-1
Typical perForMance characTerisTics
No-Load Input Current
vs V
IN
, Burst Mode Enabled
12V Output Efficiency vs V
IN
24V Output Efficiency
vs Load Maximum Load Current vs V
IN
5V Output Efficiency vs Load 12V Output Efficiency vs Load
(T
A
= 25°C unless otherwise specified)
elecTrical characTerisTics
operating junction temperature range. The LTC3114H-1 specifications are
guaranteed over the –40°C to 150°C operating junction temperature range.
The LTC3114MP-1 specifications are guaranteed over the –55°C to 150°C
operating junction temperature range. High junction temperatures degrade
operating lifetime; operating lifetime is derated for junction temperatures
greater than 125°C. The maximum ambient temperature consistent with
these specifications is determined by specific operating conditions in
conjunction with board layout, the rated package thermal resistance and
other environmental factors.
The junction temperature (T
J
in degrees Celsius) is calculated from the
ambient temperature (T
A
in degrees Celsius) and the power dissipation
(P
D
in Watts) according to the following formula:
T
J
= T
A
+ (P
D
• θ
JA
)
where θ
JA
is the thermal impedance of the package.
Note 3: Current measurements are performed when the LTC3114-1 is
not switching. The current limit values measured in operation will be
somewhat higher due to the propagation delay of the comparators. The
LTC3114-1 is tested in a proprietary non-switching test mode.
Note 4: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. The maximum
rated junction temperature will be exceeded when this protection is active.
Continuous operation above the specified absolute maximum operating
junction temperature may impair device reliability or permanently damage
the device.
Note 5: Operating output voltage can be programmed as low as 1.0V
nominal if the accurate programmable output current limit feature is not
required.
Note 6: Connecting LDO/PLDO to the regulated 5V output (bootstrapping),
reduces quiescent current substantially. Typical no-load quiescent current
for 12V V
IN
to 5V V
OUT
is 30µA, if boostrapped.
LOAD CURRENT (A)
60
EFFICIENCY (%)
65
70
75
80
0.001 0.01 0.1 1
31141 G01
55
50
45
40
85
95
90
V
IN
= 3.6V
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
LOAD CURRENT (A)
60
EFFICIENCY (%)
65
70
75
80
0.001 0.01 0.1 1
31141 G02
55
50
45
40
85
95
90
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
INPUT VOLTAGE (V)
EFFICIENCY (%)
95
90
85
31141 G03
70
80
75
1 10 40
I
LOAD
= 200mA
I
LOAD
= 400mA
I
LOAD
= 600mA
I
LOAD
= 1A
LOAD CURRENT (A)
0.0001
EFFICIENCY (%)
65
70
75
80
0.001 0.01 0.1 1
60
85
95
90
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
INPUT VOLTAGE (V)
1
0.55
OUTPUT CURRENT (A)
0.75
0.95
10 40
0.35
0.05
0.15
1.35
1.15
0.45
0.65
0.85
0.25
1.25
1.05
V
OUT
= 5V
V
OUT
= 12V
V
OUT
= 24V
INPUT VOLTAGE (V)
1
INPUT CURRENT (µA)
40
80
10 40
20
160
120
60
140
100
V
OUT
= 5V
V
OUT
= 12V
