LTC3402_15 Datasheet, PDF (3/16 Pages) Linear Technology – 2A, 3MHz Micropower Synchronous Boost Converter

LTC3402
ELECTRICAL CHARACTERISTICS
The ● denotes specifications that apply over the full operating temperature range, otherwise specifications are at T_A = 25°C.
V_IN = 1.2V, V_OUT = 3.3V unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX
PGOOD Low Voltage
PGOOD Leakage
SHDN Input High
SHDN Input Low
I_PGOOD = 1mA
V_OUT = 1V, I_PGOOD = 20μA
V_PGOOD = 5.5V
V_IN = V_SHDN
0.1
0.2
0.1
0.4
0.01
1
1
0.4
SHDN Input Current
V_SHDN = 5.5V
0.01
1
UNITS
V
V
μA
V
V
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 LTC3402E is guaranteed to meet performance specifications
from 0°C to 70°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: Current is measured into the V_OUT pin since the supply current is
bootstrapped to the output pin and in the application will reflect to the
input supply by (V_OUT/V_IN) • I/Efficiency. The outputs are not switching.
Note 4: Once the output is started, the IC is not dependent upon the V_IN
supply.
TYPICAL PERFOR A CE CHARACTERISTICS (T_A = 25°C unless otherwise noted)
Switching Waveform on SW Pin
SW Pin and Inductor Current (I_C)
in Discontinuous Mode. Ringing
Control Circuitry Eliminates High
Frequency Ringing
Transient Response 5mA to 50mA
SW
1V/DIV
50ns/DIV
I_L
50mA/DIV
0A
SW
1V/DIV
0V
3402 G01
V_OUT
100mV/DIV
200ns/DIV
50mA
I_OUT
5mA
3402 G02
C_OUT = 22μF
L = 3.3μH
f_OSC = 1MHz
200μs/DIV
3402 G03
Transient Response 50mA to 500mA
Burst Mode Operation
Burst Mode Operation
V_OUT
200mV/DIV
V_OUT
AC
100mV/DIV
V_OUT
AC
100mV/DIV
550mA
50mA
C_OUT = 22μF
L = 3.3μH
f_OSC = 1MHz
200μs/DIV
SW
1V/DIV
3402 G04
V_IN = 1.2V
5ms/DIV
V_OUT = 3.3V
C_OUT = 100μF
I_OUT = 250μA
MODE/SYNC PIN = HIGH
SW
1V/DIV
3402 G05
V_IN = 1.2V
200μs/DIV
V_OUT = 3.3V
C_OUT = 100μF
I_OUT = 20mA
MODE/SYNC PIN = HIGH
3402 G06
3402fb
3