Datasheet
3
LTC3410
3410fb
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
UVLO
Undervoltage Lockout Threshold V
IN
Rising 2 2.3 V
V
IN
Falling 1.94 V
I
S
Input DC Bias Current (Note 4)
Burst Mode
®
Operation V
FB
= 0.83V or V
OUT
= 104%, I
LOAD
= 0A 26 35 µA
Shutdown V
RUN
= 0V 0.1 1 µA
f
OSC
Oscillator Frequency V
FB
= 0.8V or V
OUT
= 100% ● 1.8 2.25 2.7 MHz
V
FB
= 0V or V
OUT
= 0V 310 kHz
R
PFET
R
DS(ON)
of P-Channel FET I
SW
= 100mA 0.75 0.9 Ω
R
NFET
R
DS(ON)
of N-Channel FET I
SW
= –100mA 0.55 0.7 Ω
I
LSW
SW Leakage V
RUN
= 0V, V
SW
= 0V or 5V, V
IN
= 5V ±0.01 ±1 µA
V
RUN
RUN Threshold ● 0.3 1 1.5 V
I
RUN
RUN Leakage Current ● ±0.01 ±1 µA
Burst Mode is a registered trademark of Linear Technology Corporation.
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.
ELECTRICAL 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: 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
UW
Efficiency vs Input Voltage
Efficiency vs Output Current
(From Figure1 Except for the Resistive Divider Resistor Values)
INPUT VOLTAGE (V)
2.5
100
90
80
70
60
50
40
30
45
3410 G02
3 3.5
4.5 5.5
EFFFICIENCY (%)
I
OUT
= 10mA
I
OUT
= 0.1mA
I
OUT
= 100mA
V
OUT
= 1.8V
I
OUT
= 1mA
I
OUT
= 250mA
OUTPUT CURRENT (mA)
0.1
0
10
20
30
40
EFFICIENCY (%)
50
60
70
80
90
100
10 1001 1000
3410 G03
V
OUT
= 1.8V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
Efficiency vs Output Current
OUTPUT CURRENT (mA)
0.1
0
10
20
30
40
EFFICIENCY (%)
50
60
70
80
90
100
10 1001 1000
3410 G04
V
OUT
= 1.2V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V