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| LTC3541_15 Datasheet, PDF (2/20 Pages) Linear Technology – High Efficiency Buck VLDO Regulator | |||
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LTC3541
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltages:
VIN, LVIN................................................... â0.3V to 6V
LVIN â VIN...........................................................<0.3V
Pin Voltages:
ENVLDO, ENBUCK, MODE, SW,
LFB, BUCKFB..............................â0.3V to (VIN + 0.3V)
Linear Regulator IOUT(MAX) (100ms) (Note 9).......100mA
Operating Ambient Temperature Range
(Note 2).................................................... â40°C to 85°C
Junction Temperature (Note 5).............................. 125°C
Storage Temperature Range................... â65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
VIN 1
ENBUcK 2
BUcKFB 3
LFB 4
LVOUT 5
10 SW
9 ENVLDO
11
8 MODE
7 GND
6 LVIN
DD PAcKAGE
10-LEAD (3mm à 3mm) PLASTIc DFN
TJMAX = 125°C, θJA = 43°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
Order part number DD part marking
LTC3541EDD
lcbs
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The â denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V unless otherwise specified (Note 2)
SYMBOL
IPK
IBUCKFB
ILFB
VIN
VIN(LINEREG)
PARAMETER
Peak Inductor Current
BUCKFB Pin Input Current
LFB Pin Input Current
Input Voltage Range
Buck VIN Line Regulation
LVIN(LINEREG)
VLDO VIN Line Regulation
(Referred to LFB)
Linear Regulator VIN Line
Regulation (Referred to LFB)
LVIN Line Regulation
(Referred to LFB)
VLDODO
VLOADREG
LVIN â LVOUT Dropout Voltage
(Note 9)
Buck Output Load Regulation
VLDO Output Load Regulation
Linear Regulator Output Load
VBUCKFB
Reference Regulation Voltage
(Note 6)
VLFB
Reference Regulation Voltage
(Note 7)
CONDITIONS
VIN = 4.2V (Note 8)
VBUCKFB = 0.9V
l
VLFB = 0.45V
l
(Note 4)
l
VIN = 2.7V to 5.5V, ENBUCK = VIN,
l
ENVLDO = 0V, MODE = VIN (Note 6)
VIN = 2.7V to 5.5V, LVOUT = 1.2V, ENBUCK = VIN,
ENVLDO = VIN, IOUT(VLDO) = 100mA, LVIN = 1.5V
VIN = 2.7V to 5.5V, LVOUT = 1.2V, ENBUCK = 0V,
ENVLDO = VIN, IOUT(LREG) = 10mA
LVIN = 0.9V to 5.5V, VIN = 5.5V, LVOUT = 0.4V,
ENBUCK = VIN, ENVLDO = VIN, MODE = VIN,
IOUT(VLDO) = 100mA
LVIN = 1.5V, ENBUCK = VIN, ENVLDO = VIN,
MODE = VIN, IOUT(VLDO) = 50mA, VLFB = 0.3V
ENBUCK = VIN, ENVLDO = 0V, MODE = VIN (Note 6)
IOUT(VLDO) = 1mA â 300mA, LVIN = 1.5V, LVOUT = 1.2V, l
ENBUCK = VIN, ENVLDO = VIN, MODE = VIN
IOUT(LREG) = 1mA â 30mA, LVOUT = 1.2V,
l
ENBUCK = 0V, ENVLDO = VIN
ENBUCK = VIN, ENVLDO = 0V, TA = 25°C
ENBUCK = VIN, ENVLDO = 0V, 0°C ⤠TA ⤠85°C
ENBUCK = VIN, ENVLDO = 0V, â40°C ⤠TA ⤠85°C
l
ENBUCK = 0V, ENVLDO = VIN, TA = 25°C
ENBUCK = 0V, ENVLDO = VIN, 0°C ⤠TA ⤠85°C
ENBUCK = 0V, ENVLDO = VIN, â40°C ⤠TA ⤠85°C
l
MIN
0.8
â200
2.7
0.784
0.782
0.78
0.392
0.391
0.390
TYP MAX
0.95 1.25
±50
â40
5.5
0.04
0.4
0.6
0.6
0.3
28
60
0.5
0.25
0.5
0.25
0.5
0.8 0.816
0.8 0.818
0.8
0.82
0.4 0.408
0.4 0.409
0.4 0.410
UNITS
A
nA
nA
V
%/V
mV/V
mV/V
mV/V
mV
%
%
%
V
V
V
V
V
V
3541fa
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