LTC3543_15 Datasheet, PDF (2/20 Pages) Linear Technology – 600mA Synchronous Step Down Buck Regulator with PLL, Soft-Start and Spread Spectrum

LTC3543
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V_IN Voltage................................................... –0.3V to 6V
RUN, V_FB, MODE, CAP Voltages...................–0.3V to V_IN
SW Voltage ....................................–0.3V to (V_IN + 0.3V)
Operating Temperature Range (Note 2).... –40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
SW 1
6 V_IN
CAP 2
7
5 RUN
MODE 3
4 VFB
DCB PACKAGE
6-LEAD (2mm s 3mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 64°C/W
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3543EDCB#PBF
LTC3543EDCB#TRPBF LCCK
6-Lead (2mm × 3mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
RUN
Run Threshold
0.3
1
1.5
V
V_FB
I_VFB
I_PK
V_LOADREG
V_LINEREG
V_IN
I_S
f_OSC
R_PFET
R_NFET
I_SW
Regulated Feedback Voltage
Feedback Pin Current
Peak Inductor Current
Output Voltage Load Regulation
Output Voltage Line Regulation
Input Voltage Range
Input DC Bias Current
Active Mode
Sleep Mode
Shutdown
Nominal Oscillator Frequency
R_DS(ON) of P-Channel FET
R_DS(ON) of N-Channel FET
SW Leakage
(Note 4)
V_IN = 3.6V, V_FB = 0V
(Note 4)
(Note 5)
V_OUT = 90%, I_LOAD = 0A
V_OUT = 103%, I_LOAD = 0A
V_RUN = 0V, V_IN = 5.5V
I_SW = 100mA
I_SW = 100mA
V_RUN = 0V, V_SW = 0V or 5.5V, V_IN = 5.5V
l 0.588 0.6
0.7
1
0.5
l 2.5
375
45
0.1
l 1.80 2.25
0.45
0.35
0.612
50
1.3
0.5
5.5
500
70
1
±1
V
nA
A
%/mA
%/V
V
μA
μA
μA
MHz
Ω
Ω
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 LTC3543E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature ranges are assured by design, characterization and
correlation with statistical process controls.
3543fa
2