LTC3589IUJ-TRPBF datasheet(4/44 Pages) LINER

部件名	LTC3589IUJ-TRPBF

功能描述	8-Output Regulator with Sequencing and I2C

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制造商	LINER [Linear Technology]

网页	http://www.linear.com

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4 / 44 page

LTC3589

4

3589p

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Operating Input Supply Voltage, VIN

l

2.7

5.5

V

IVINLDO1

VIN Quiescent Current

All Enables = 0V

l

10

17

μA

fOSC

Oscillator Frequency

l

1.9

2.25

2.6

MHz

Step Down Switching Regulators 1, 2, and 3

IVIN

Pulse-Skipping Mode VIN Quiescent Current

Per Buck

Burst Mode® VIN Quiescent Current Per Buck

VFB = 0.85V (Note 5)

l

135

27

TBD

40

μA

IFB

Feedback Pin Input Current

VFB = 0.8V

–0.1

0.1

μA

DX

Maximum Duty Cycle

VFB = 0V

100

%

RSW

SW Pull-Down Resistance

Regulators Disabled

2000

Ω

tSS

Soft-Start Rate

(Note 6)

2

V/ms

VFB(MAX)

Maximum Feedback Voltage

BxDTV1 = BxDTV2 = 11111,

VIN = 2.7V to 5.5V

l

0.735

0.75

0.765

V

VFB(LSB)

Feedback LSB Step Size

12.5

mV

VFB(MIN)

Minimum Feedback Voltage

BxDTV1 = BxDTV2 = 00000,

VIN = 2.7V to 5.5V

l

0.351

0.3625

0.374

V

1.6A Step Down Switching Regulator 1 (Buck 1)

ILIM1

Peak PMOS Current Limit SW1

l

2.2

2.7

A

RP1

RDS(ON) of PMOS1

ISW1 = 100mA

180

mΩ

RN1

RDS(ON) of NMOS1

ISW1 = 100mA

110

mΩ

1.0A Step Down Switching Regulators 2 and 3

ILIM2, 3

Peak PMOS Current Limit SW2

l

1.5

1.9

A

RP2, 3

RDS(ON) of PMOS3

250

mΩ

RN2, 3

RDS(ON) of NMOS3

130

mΩ

1.2A Buck-Boost Switching Regulator 4 (Buck-Boost)

IVIN

PWM Mode VIN Quiescent Current

Burst Mode VIN Quiescent Current

VBB_FB = 0.85V

l

130

19

μA

VBB_FB

Feedback Voltage

VIN = 2.7V to 5.5V, VOUT = 5.5V

l

0.776

0.8

0.824

V

VOUTBB

Output Voltage Range

1.8

5.0

V

ILIM4

Peak PMOS Current Limit SW4AB

l

2.5

2.7

A

IPEAK4

Forward Burst Current Limit (Switch A)

Burst Mode Operation

500

mA

ILIMR4

Reverse Current Limit (Switch D)

800

mA

IZERO4

Reverse Burst Current Limit (Switch D)

Burst Mode Operation

0

mA

RP4

RDS(ON) of Switch A and Switch D

ISW4AB = ISW4CD = 100mA

160

mΩ

RN4

RDS(ON) of Switch B and Switch C

ISW4AB = ISW4CD = –100mA

110

mΩ

ROUT4

BB_OUT Pull-Down Resistance

Regulator Disabled

2000

Ω

tSS

Soft-Start Rate

(Note 6)

2

V/ms

IFB

Feedback Pin Input Current

VFB = 0.85V

–0.1

0.1

μA

The

l denotes the speciﬁcations which apply over the full operating junction

temperature range, otherwise speciﬁcations are at TA = 25°C (Note 2). VIN = PVIN1 = PVIN2 = PVIN3 = PVIN4 = VIN_LDO2 = VIN_LDO34

= DVDD = 3.8V. All regulators disabled unless otherwise noted.

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