LTC3546 datasheet(3/28 Pages) LINER

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LTC3546

3546fb

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

junction temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = VCCA = 3.6V, unless otherwise speciﬁed. (Note 2)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN1, VIN1D,

VIN2, VCCA,

VCCD

Operating Voltage Range

VIN1 = VIN1D = VIN2 = VCCA = VCCD

2.25

5.5

IFB1, IFB2

Feedback Pin Input Current

(Note 3)

±0.1

μA

VFB1, VFB2

Feedback Voltage

(Note 3)

0.588

0.6

0.612

ΔVLINEREG

Reference Voltage Line Regulation

%/V is The Percentage Change in VOUT

with a Change in VIN

VIN = 2.25V to 5.5V (Note 3)

0.04

0.2

%/V

ΔVLOADREG

Output Voltage Load Regulation

ITH1, ITH2 = 0.36V (Note 3)

ITH1, ITH2 = 0.84V (Note 3)

0.02

–0.02

0.2

–0.2

gm(EA)

Error Ampliﬁer Transconductance

(Note 3)

1400

μS

VTRACK/SS1,

VTRACK/SS2

Tracking Voltage Offset

VTRACK/SS1,2 = 0.3V

ITRACK/SS1,

ITRACK/SS2

Tracking Current Source

VTRACK/SS1,2 = 0V

0.8

1.15

1.5

μA

Input DC Supply Current (Note 4)

Active Mode

VFB1 = VFB2 = 0.55V, VMODE = VIN,

VRUN1 = VRUN2 = VIN

600

990

μA

Half Active Mode (VRUN1 = VIN, VRUN2 = 0) VFB1 = 0.55V, VMODE = VIN, VRUN1 = VIN,

VRUN2 = 0V

400

800

μA

Half Active Mode (VRUN1 = 0, VRUN2 = VIN)VFB2 = 0.55V, VMODE = VIN, VRUN1 = 0V,

VRUN2 = VIN

400

800

μA

Both Channels in Sleep Mode

VFB1 = VFB2 = 0.75V, VMODE = VIN,

VRUN1 = VRUN2 = VIN

160

300

μA

Shutdown

VRUN1 = VRUN2 = 0V

0.2

μA

fOSC

Oscillator Frequency

VFREQ: RT = VIN

VFREQ: RT = 143k

VFREQ: Resistor (Note 5)

1.8

1.2

0.75

2.25

1.5

2.9

1.8

MHz

ILIM1

Peak Switch Current Limit on SW1 (1A)

BMC1 = VIN, VITH1 = 1.4V

BMC1 = 0.4V, VITH1 = 0V

1.4

1.6

0.45

ILIM2

Peak Switch Current Limit on SW2A/B (2A) BMC2 = VIN, VITH1 = 1.4V

BMC2 = 0.4V, VITH1 = 0V

2.8

3.2

0.9

ILIM1+1D

Peak Switch Current Limit on

SW1 + SW1D (2A)

SW1 Externally Connected to SW1D

BMC1 = VIN (Note 8)

BMC1 = 0.4V (Note 8)

2.5

3.2

1.6

ILIM2+1D

Peak Switch Current Limit on

SW2A/B + SW1D (3A)

SW2A/B Externally Connected to SW1D

BMC2 = VIN (Note 8)

BMC2 = 0.4V (Note 8)

3.75

4.8

2.4

RDS(ON)1

SW1 Top Switch On-Resistance (1A)

SW1 Bottom Switch On-Resistance

VIN2 = 3.6V

0.19

0.18

RDS(ON)1D

SW1D Top Switch On-Resistance (1A)

SW1D Bottom Switch On-Resistance

VIN2 = 3.6V

0.19

0.17

RDS(ON)2

SW2A/B Top Switch On-Resistance (2A)

SW2A/B Bottom Switch On-Resistance

VIN1 = 3.6V

0.096

0.085

ISW1(LKG)

Switch Leakage Current SW1

VIN = 6V

VITH1 = 0V

VRUN1 = 0V

0.01

μA

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