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| LTC3541-1 Datasheet, PDF (2/20 Pages) Linear Technology – High Efficiency Buck + VLDO Regulator | |||
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LTC3541-1
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
pIN CONFIGURATION
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 information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
LTC3541EDD-1#PBF
LTC3541EDD-1#TRPBF LCWQ
10-Lead (3mm à 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
â40°C to 85°C
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
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
MIN
0.8
â200
2.7
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
UNITS
A
nA
nA
V
%/V
mV/V
mV/V
mV/V
mV
%
%
%
35411fa
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