LTC2928I データシートの表示（PDF） - Linear Technology

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LTC2928I

Multichannel Power Supply Sequencer and Supervisor

Linear Technology 

Order Information

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

LTC2928CG#PBF

LTC2928CG#TRPBF

LTC2928CG

36-Lead Plastic SSOP (5.3mm)

LTC2928IG#PBF

LTC2928IG#TRPBF

LTC2928IG

36-Lead Plastic SSOP (5.3mm)

LTC2928CUHF#PBF

LTC2928CUHF#TRPBF LTC2928CUHF

38-Lead (5mm × 7mm) Plastic QFN

LTC2928IUHF#PBF

LTC2928IUHF#TRPBF LTC2928IUHF

38-Lead (5mm × 7mm) Plastic QFN

Consult LTC Marketing for parts specified with wider operating temperature ranges.

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/

LTC2928

TEMPERATURE RANGE

0°C to 70°C

0°C to 70°C

–40°C to 85°C

–40°C to 85°C

Electrical Characteristics The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C, VCC = 3.3V unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Pins: VCC, HVCC

VVCC

VCC Input Supply Range

IVCC

VCC Input Supply Current

VUVL

VCC Input Supply Undervoltage Lockout

VUVL(HYST)

Undervoltage Lockout Hysteresis

VHVCC

High Voltage Input Supply Range

VCC(REG)

Regulated VCC from HVCC

IREG

Regulated VCC Output Current to

External Load (Note 2)

HVCC = GND

VCC Rising

VHVCC = 12V

l 2.9

6

V

l

1

2.5

mA

l 2.75

2.8

2.85

V

l

50

100

150

mV

l 7.2

12

16.5

V

l 3.2

3.3

3.4

V

l

–10

mA

IHVCC

HVCC Input Supply Current

IREG = 0mA, VHVCC = 12V

l

Sequence Up/Down Pin: ON

1

2

mA

VON

ON Threshold Voltage

VON(HYST)

ON Hysteresis

ION(LKG)

ON Leakage Current

Voltage Monitor Pins: V1, V2, V3, V4

VON Rising

VON = 1V

l 0.985 1.00 1.015

V

l

20

30

40

mV

l

±50

nA

VMON(TH)

VSEQ(TH)

IMON(LKG)

tMON(UV)

Reset Threshold Voltage

V1 Negative Threshold Voltage

Sequencing Thresholds

0.67 VMON(TH)

0.33 VMON(TH)

0.10 VMON(TH)

Monitor Pin Leakage Current

Undervoltage Pulse Width Required to

Trip Comparators

VSEL = VCC

See Table 4

VMON = 0.55V

VMON below VMON(TH) by 1%

l 0.4925 0.500 0.5075

V

l

±18

mV

l 0.315 0.333 0.351

V

l 0.149 0.167 0.185

V

l 0.032 0.05 0.068

V

l

±15

nA

225

µs

tMON(OV)

Overvoltage Pulse Width Required to VMON above Overvoltage Threshold by

225

µs

Trip OV

1%

For more information www.linear.com/LTC2928

2928fa

3

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