LTC3404IMS8 Datasheet, PDF (3/16 Pages) Linear Technology – 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator

LTC3404
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over –55°C to 125°C, otherwise specifications are TA = 25°C.
V_IN = 3.6V unless otherwise specified.
SYMBOL
I_VFB
V_FB
PARAMETER
Feedback Current
Regulated Output Voltage
ΔV_OVL
ΔV_FB
V_LOADREG
Output Overvoltage Lockout
Reference Voltage Line Regulation
Output Voltage Load Regulation
V_IN
Input Voltage Range
I_Q
Input DC Bias Current
Pulse Skipping Mode
Burst Mode Operation
Shutdown
f_OSC
Oscillator Frequency
f_SYNC
I_{PLL LPF}
R_PFET
R_NFET
I_PK
SYNC Capture Range
Phase Detector Output Current
Sinking Capability
Sourcing Capability
R_DS(ON) of P-Channel MOSFET
R_DS(ON) of N-Channel MOSFET
Peak Inductor Current
I_LSW
V_SYNC/MODE
I_SYNC/MODE
V_RUN
I_RUN
SW Leakage
SYNC/MODE Threshold
SYNC/MODE Leakage Current
RUN Threshold
RUN Input Current
CONDITIONS
(Note 4)
(Note 4) 0°C ≤ T_A ≤ 125°C
(Note 4) – 55°C ≤ T_A ≤ 125°C
ΔV_OVL = V_OVL – V_FB
V_IN = 2.65V to 6V (Note 4)
Measured in Servo Loop; V_ITH = 0.9V to 1.2V
Measured in Servo Loop; V_ITH = 1.5V to 1.2V
(Note 5)
2.65V < V_IN < 6V, V_SYNC/MODE = 0V, I_OUT = 0A
V_SYNC/MODE = V_IN, I_OUT = 0A
V_RUN = 0V, V_IN = 6V
V_FB = 0.8V
V_FB = 0V
f_PLLIN < f_OSC
f_PLLIN > f_OSC
I_SW = 100mA
I_SW = –100mA
V_IN = 3.3V, V_FB = 0.7V, Duty Cycle < 35%,
T_A = 125°C
V_IN = 4V, V_FB = 0.7V, Duty Cycle < 35%,
T_A = 125°C
V_RUN = 0V, V_SW = 0V or 6V, V_IN = 6V
V_SYNC/MODE Rising
V_RUN Rising
MIN TYP MAX
4
30
0.784 0.8 0.816
0.74
0.8
0.84
20
50
110
0.05
0.2
0.1
1
– 0.1
–1
2.65
6
400 700
10
15
0
1
1.25
1.4
1.65
200
1.0
1.7
6
20
40
–6
–20 –40
0.7
0.8
0.4
1.0
1.1
0.8
1.2
±3
0.3
1.5
±1
0.3
1.5
±1
UNITS
nA
V
V
mV
%/V
%
%
V
μA
μA
μA
MHz
kHz
MHz
μA
μA
Ω
Ω
A
A
μA
V
μA
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 LTC3404E 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. The LTC3404I is guaranteed to meet
performance specifications over the –40°C to 85°C operating temperature
range. The LTC3404MP is guaranteed to meet performance specifications
over the –55°C to 125°C operating temperature range.
Note 3: T_J is calculated from the ambient temperature T_A and power
dissipation P_D according to the following formulas:
T_J = T_A + (P_D)(150°C/W)
Note 4: The LTC3404 is tested in a feedback loop which servos V_FB to the
balance point for the error amplifier (V_ITH = 1.2V).
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
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