LTC3410B_15 Datasheet, PDF (3/16 Pages) Linear Technology – 2.25MHz, 300mA Synchronous Step-Down Regulator in SC70

LTC3410B
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 PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
I_S
f_OSC
R_PFET
R_NFET
I_LSW
V_RUN
I_RUN
Input DC Bias Current
Operating
Shutdown
Oscillator Frequency
R_DS(ON) of P-Channel FET
R_DS(ON) of N-Channel FET
SW Leakage
RUN Threshold
RUN Leakage Current
(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
200 300
µA
0.1
1
µA
● 1.8
2.25
2.7
MHz
310
kHz
0.75
0.9
Ω
0.55
0.7
Ω
±0.01 ±1
µA
● 0.3
1
1.5
V
●
±0.01 ±1
µA
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 LTC3410BE 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:
LTC3410B: 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 Figure 1 Except for the Resistive Divider Resistor Values)
Efficiency vs Input Voltage
100
90 I_OUT = 100mA
80
70
60 I_OUT = 1mA
50
I_OUT = 250mA
I_OUT = 10mA
40
30
20 ^{VOUT = 1.2V}
2.5 3 3.5 4 4.5
INPUT VOLTAGE (V)
5 5.5
3410 G01
Efficiency vs Output Current
100
90
80
70
60
50
40
30
20
10
0 ^{VOUT = 1.8V}
1
10
V_IN = 2.7V
V_IN = 3.6V
V_IN = 4.2V
100
1000
OUTPUT CURRENT (mA)
3410 G02
Reference Voltage vs
Temperature
0.814
V_IN = 3.6V
0.809
0.804
0.799
0.794
0.789
0.784
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3410 G03
3410bfa
3