LTC1550 查看數據表（PDF） - Linear Technology

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LTC1550

Low Noise, Switched Capacitor Regulated Voltage Inverters

Linear Technology 

LTC1550/LTC1551

TYPICAL PERFORMANCE CHARACTERISTICS

Maximum Output Current

vs Supply Voltage

50

45 TA = 25°C

40

35

30

25

20

15

10

5

0

4.50 4.75 5.00 5.25 5.50 5.75 6.00 6.25 6.50

SUPPLY VOLTAGE (V)

LTC1550/51 • TPC04

Start-Up Time vs Supply Voltage

2.0

TA = 25°C

1.8

VOUT = – 4.1V

RL = 390Ω

1.6

1.4

1.2

1.0

0.8

Startup Time (LTC1550 Shown)

5V

SHDN

0V

0V

VOUT

– 4.1V

0.6

0.2ms/DIV

LTC1550/51 • G06

0.4

4.50 4.75 5.00 5.25 5.50 5.75 6.00 6.25 6.50

SUPPLY VOLTAGE (V)

LTC1550/51 G05

Load Transient Response

(See Figure 2, VCC = 5V)

5mV/DIV

VOUT

AC COUPLED

Line Transient Response

(See Figure 2, IL = 10mA)

5mV/DIV

VOUT

AC COUPLED

10mA

IOUT

0mA

1ms/DIV

VCC

5.5V

5V

LTC1550/51 • G07

2ms/DIV

LTC1550/51 • G08

Minimum Required VCC vs

VOUT and IOUT

6.0

5.6

5.2

4.8

IOUT = 20mA

4.4

4.0

3.6

3.2

IOUT = 5mA

IOUT = 10mA

2.8

2.4

2.0

–5

–4

–3

–2

–1

0

OUTPUT VOLTAGE (V)

LTC1550/51 • G08.5

Output Spectrum

(*See Typical Application)

90

80

70

60

50

40

30

20

10

0

–10

100k

1M

FREQUENCY (Hz)

10M

LT1550/51 • G09

* On first page of data sheet.

Spot Noise

(*See Typical Application)

10

1

0.1

0.01

1

10

FREQUENCY (kHz)

100

LTC1550/51 • G10

Output Spectrum

(See Figure 2, COUT = 10µF)

90

80

VCC = 5V

IL = 5mA

70 CIN = 4.7µF

60

COUT = 10µF

CL = 0.1µF

50

40

30

20

10

0

–10

100k

1M

10M

FREQUENCY (Hz)

LT1550/51 • G11

4

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