LM3550 datasheet(10/37 Pages) TI1

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VIN (V)

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

2.5

3.1

3.7

4.3

4.9

5.5

TA = -30°C

TA = +25°C

TA = +85°C

VIN (V)

5.0

4.9

4.8

4.7

4.6

4.5

4.4

4.3

4.2

4.1

4.0

2.5

3.1

3.7

4.3

4.9

5.5

VLED = 1.5V

VLED = 1.8V

VLED = 2.4V

VLED = 2.0V

VIN (V)

105

104

103

102

101

100

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

TA = +85°C

TA = -30°C

TA = +25°C

VIN (V)

1.15

1.10

1.05

1.00

0.95

0.90

0.85

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

TA = +85°C

TA = -30°C

TA = +25°C

VIN (V)

220

210

200

190

180

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

TA = -30°C

TA = +85°C

TA = +25°C

Torch Code = 7, VLED = 3.3V

VIN (V)

110

105

100

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

VLED = 2.7V, 3.0V, 3.3V, 3.6V, 4.0V

Torch Code = 2

LM3550

SNVS569B – MAY 2009 – REVISED MAY 2013

www.ti.com

Typical Performance Characteristics (continued)

Unless otherwise specified: TA = 25°C; VIN = 3.6V; CIN = 4. 7 µF, COUT = 2.2 µF, C1 = C2 = 1 µF. Super-Capacitor = 0.5F

TDK EDLC272020-501-2F-50,

Torch Current

vs.

Input Voltage

Code = 7

Different VLED

Figure 27.

Figure 28.

Feedback Voltage

Oscillator Frequency

vs.

Input Voltage

Figure 29.

Figure 30.

Indicator Current

Shutdown Current

vs.

Input Voltage

Different VLED

Figure 31.

Figure 32.

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