LTC1550LIGN datasheet(4/12 Pages) LINER

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LTC1550L/LTC1551L

TYPICAL PERFORMANCE CHARACTERISTICS

Supply Current vs Temperature

Oscillator Frequency vs

Temperature

OUTPUT VOLTAGE (V)

–5

6.0

5.6

5.2

4.8

4.4

4.0

3.6

3.2

2.8

2.4

2.0

–1

1550L/51L G03

–4

–3

–2

IOUT = 20mA

IOUT = 10mA

IOUT = 5mA

Minimum Required VCC

vs VOUT and IOUT

TEMPERATURE (˚C)

–55 –35 –15

85 105 125

875

925

975

1550L/51L G01

825

775

725

675

VCC = 5V

VOUT = –4.1V

TEMPERATURE (

°C)

1550L/51L G02

VCC = 5V

VOUT = –4.1V

–55 –35 –15

85 105 125

5.0

4.5

4.0

3.5

3.0

2.5

Reference Voltage vs VCC + |VOUT|

Start-Up Time vs Supply Voltage

Maximum Output Current

vs Supply Voltage

Load Transient Response

(See Figure 3, VCC = 5V)

Line Transient Response

(See Figure 3, IL = 10mA)

– 4.1V

VOUT

SHDN

0.2ms/DIV

1550/51 G07

Startup Time (LTC1550L Shown)

POWER VALID

0mA

1ms/DIV

1550/51 G08

10mA

VOUT

5mV/DIV

COUPLED

IOUT

4.75V

2ms/DIV

1550/51 G09

VOUT

5mV/DIV

COUPLED

5.25V

VCC

SUPPLY VOLTAGE (V)

2.25

2.75

3.25

3.75

4.25

4.75

5.25

1550L/51L G04

TA = 25°C

VOUT = –2V

VOUT = –2.5V

VOUT = –4.1V

SUPPLY VOLTAGE (V)

2.25

2.75

3.25

3.75

4.25

4.75

5.25

1550L/51L G05

2.5

2.0

1.5

1.0

0.5

TA = 25°C

VOUT = –2V

RL = 390Ω

VOUT = –4.1V

RL = 820Ω

1.24

1.238

1.236

1.234

1.232

1.230

1.228

1.226

1.224

1.222

1.220

1.218

VCC + |VOUT| (V)

456789

4.5

5.5

6.5

7.5

8.5

9.5

1550L/51L G06

TA = 25°C

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