LTC3410
ELECTRICAL CHARACTERISTICS
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
V
IN
= 3.6V unless otherwise specified.
SYMBOL
V
UVLO
I
S
PARAMETER
Undervoltage Lockout Threshold
Input DC Bias Current
Burst Mode
®
Operation
Shutdown
Oscillator Frequency
R
DS(ON)
of P-Channel FET
R
DS(ON)
of N-Channel FET
SW Leakage
RUN Threshold
RUN Leakage Current
CONDITIONS
V
IN
Rising
V
IN
Falling
(Note 4)
V
FB
= 0.83V or V
OUT
= 104%, I
LOAD
= 0A
V
RUN
= 0V
V
FB
= 0.8V or V
OUT
= 100%
V
FB
= 0V or V
OUT
= 0V
I
SW
= 100mA
I
SW
= –100mA
V
RUN
= 0V, V
SW
= 0V or 5V, V
IN
= 5V
●
●
●
MIN
TYP
2
1.94
26
0.1
MAX
2.3
UNITS
V
V
µA
µA
MHz
kHz
Ω
Ω
µA
V
µA
35
1
2.7
0.9
0.7
±1
1.5
±1
f
OSC
R
PFET
R
NFET
I
LSW
V
RUN
I
RUN
1.8
2.25
310
0.75
0.55
±0.01
0.3
1
±0.01
Burst Mode is a registered trademark of Linear Technology Corporation.
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:
The LTC3410E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
LTC3410: T
J
= T
A
+ (P
D
)(250°C/W)
Note 4:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5:
This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
TYPICAL PERFOR A CE CHARACTERISTICS
(From Figure1 Except for the Resistive Divider Resistor Values)
Efficiency vs Input Voltage
100
90
80
I
OUT
= 250mA
70
60
50
40
30
2.5
V
OUT
= 1.8V
3
4.5
4
3.5
INPUT VOLTAGE (V)
5
5.5
3410 G02
I
OUT
= 100mA
EFFFICIENCY (%)
I
OUT
= 10mA
EFFICIENCY (%)
I
OUT
= 1mA
60
50
40
30
20
10
V
OUT
= 1.8V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
1000
3410 G03
EFFICIENCY (%)
I
OUT
= 0.1mA
U W
Efficiency vs Output Current
100
90
80
70
100
90
80
70
60
50
40
30
20
10
Efficiency vs Output Current
0
0.1
1
10
100
OUTPUT CURRENT (mA)
V
OUT
= 1.2V
0
1
10
100
0.1
OUTPUT CURRENT (mA)
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
1000
3410 G04
3410fb
3
LINER [ LINEAR TECHNOLOGY ]
