LTC2928CUHF データシートの表示（PDF） - Linear Technology

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LTC2928CUHF

Multichannel Power Supply Sequencer and Supervisor

Linear Technology 

Typical Performance Characteristics

LTC2928

Reference Output Voltage vs

Temperature

1.200

Comparator Under-Voltage

Glitch Immunity

1k

1.196

1.192

1.188

1.184

1.180

–50 –25 0

25 50

TEMPERATURE (°C)

75 100

2928 G05

ON Threshold Voltage (Rising) vs

Temperature

1.015

1.010

1.005

1.000

0.995

0.990

0.985

–50 –25 0

25 50

TEMPERATURE (°C)

75 100

2928 G01

Sequence, Reset and Power-Good

Timing vs Capacitance

10

1

100m

SEQUENCER TIMER

10m

RESET AND

POWER-GOOD TIMER

1m

100m

10p 100p1n

10n 100n 1µ

CAPACITANCE (F)

2928 G19

RESET OCCURS

ABOVE CURVE

100

COMPARATOR

IGNORES GLITCH

10

0.1

1

10

COMPARATOR OVERDRIVE

(% OF RESET THRESHOLD)

100

2928 G15

Relative Reset Output Voltage vs

VCC (with Reset Pull-Up Resistor

to VCC)

50

1k

40

30

5k

20

10k

10

100k

0

0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5

VCC (V)

2928 G17

Three State Selection Pin Current

vs Pin Voltage

(SQT1, SQT2, MS1, MS2, RDIS)

20

15

10

5

0

–5

–10

–15

–20

0.3

0.6

0.9

1.2

1.5

THREE STATE PIN VOLTAGE (V)

2928 G20

For more information www.linear.com/LTC2928

Comparator Over-Voltage

Glitch Immunity

1k

OV OCCURS

ABOVE CURVE

100

COMPARATOR

IGNORES GLITCH

10

0.1

1

10

COMPARATOR OVERDRIVE

(% OF OV THRESHOLD)

100

2928 G16

RST Pull-Up Current vs

External Voltage on RST

–70

VCC = 5V

–60

–50

–40

–30

–20

VCC = 3.3V

–10

0

0

1

2

3

4

5

VRST (V)

2928 G17

IFLT(UP) vs Temperature

–22

VFLT = 2.3V

–20

–18

–16

–14

–12

–50

–25 0 25 50

TEMPERATURE (°C)

75 100

2928 G21

2928fa

7

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