LTC3541 datasheet(2/20 Pages) LINER

Part #	LTC3541

Description	High Efficiency Buck VLDO Regulator

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Manufacturer	LINER [Linear Technology]

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LTC3541

3541fa

SupplyVoltages:

VIN,LVIN.................................................. –0.3Vto6V

LVIN–VIN..........................................................<0.3V

PinVoltages:

ENVLDO,ENBUCK,MODE,SW,

LFB,BUCKFB.............................–0.3Vto(VIN+0.3V)

LinearRegulatorIOUT(MAX)(100ms)(Note9)......100mA

OperatingAmbientTemperatureRange

(Note2).................................................... –40°Cto85°C

JunctionTemperature(Note5)............................. 125°C

StorageTemperatureRange................... –65°Cto125°C

(Note 1)

The ● 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)

ELECTRICAL CHARACTERISTICS

ABSOLUTE AXI U RATI GS

PACKAGE/ORDER I FOR ATIO

TOP VIEW

11

DD PAcKAGE

10-LEAD (3mm

× 3mm) PLASTIc DFN

10

9

6

7

8

4

5

3

2

1

SW

ENVLDO

MODE

GND

LVIN

VIN

ENBUcK

BUcKFB

LFB

LVOUT

TJMAX=125°C,θJA=43°C/W

EXPOSEDPAD(PIN11)ISGND,MUSTBESOLDEREDTOPCB

ORDERPARTNUMBER

DDPARTMARKING

LTC3541EDD

LCBS

Order OptionsTapeandReel:Add#TR

LeadFree:Add#PBFLeadFreeTapeandReel:Add#TRPBF

LeadFreePartMarking:http://www.linear.com/leadfree/

ConsultLTCMarketingforpartsspecifiedwithwideroperatingtemperatureranges.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IPK

PeakInductorCurrent

VIN=4.2V(Note8)

0.8

0.95

1.25

A

IBUCKFB

BUCKFBPinInputCurrent

VBUCKFB=0.9V

●

±50

nA

ILFB

LFBPinInputCurrent

VLFB=0.45V

●

–200

–40

nA

VIN

InputVoltageRange

(Note4)

●

2.7

5.5

V

VIN(LINEREG) BuckVINLineRegulation

VIN=2.7Vto5.5V,ENBUCK=VIN,

ENVLDO=0V,MODE=VIN(Note6)

●

0.04

0.4

%/V

VLDOVINLineRegulation

(ReferredtoLFB)

VIN=2.7Vto5.5V,LVOUT=1.2V,ENBUCK=VIN,

ENVLDO=VIN,IOUT(VLDO)=100mA,LVIN=1.5V

0.6

mV/V

LinearRegulatorVINLine

Regulation(ReferredtoLFB)

VIN=2.7Vto5.5V,LVOUT=1.2V,ENBUCK=0V,

ENVLDO=VIN,IOUT(LREG)=10mA

0.6

mV/V

LVIN(LINEREG) LVINLineRegulation

(ReferredtoLFB)

LVIN=0.9Vto5.5V,VIN=5.5V,LVOUT=0.4V,

ENBUCK=VIN,ENVLDO=VIN,MODE=VIN,

IOUT(VLDO)=100mA

0.3

mV/V

VLDODO

LVIN–LVOUTDropoutVoltage

(Note9)

LVIN=1.5V,ENBUCK=VIN,ENVLDO=VIN,

MODE=VIN,IOUT(VLDO)=50mA,VLFB=0.3V

28

60

mV

VLOADREG

BuckOutputLoadRegulation

ENBUCK=VIN,ENVLDO=0V,MODE=VIN(Note6)

0.5

%

VLDOOutputLoadRegulation

IOUT(VLDO)=1mA–300mA,LVIN=1.5V,LVOUT=1.2V,

ENBUCK=VIN,ENVLDO=VIN,MODE=VIN

●

0.25

0.5

%

LinearRegulatorOutputLoad

IOUT(LREG)=1mA–30mA,LVOUT=1.2V,

ENBUCK=0V,ENVLDO=VIN

●

0.25

0.5

%

VBUCKFB

ReferenceRegulationVoltage

(Note6)

ENBUCK=VIN,ENVLDO=0V,TA=25°C

0.784

0.8

0.816

V

ENBUCK=VIN,ENVLDO=0V,0°C≤TA≤85°C

0.782

0.8

0.818

V

ENBUCK=VIN,ENVLDO=0V,–40°C≤TA≤85°C

●

0.78

0.8

0.82

V

VLFB

ReferenceRegulationVoltage

(Note7)

ENBUCK=0V,ENVLDO=VIN,TA=25°C

0.392

0.4

0.408

V

ENBUCK=0V,ENVLDO=VIN,0°C≤TA≤85°C

0.391

0.4

0.409

V

ENBUCK=0V,ENVLDO=VIN,–40°C≤TA≤85°C

●

0.390

0.4

0.410

V

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