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Electrical Characteristics

TL3577

100-kHz CURRENT-MODE SIMPLE STEP-UP/FLYBACK SWITCHING REGULATOR

SLVS633 – OCTOBER 2006

V

TL3577-ADJ

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

25

°C

11.6

12

12.4

Output voltage

V

Full range

11.4

12.6

25

°C

20

50

Line regulation

mV

See Figure 1

Full range

100

25

°C

20

50

Load regulation

mV

Full range

100

η

Efficiency

25

°C

80

%

25

°C

7.5

10

Full range

14

Input supply current

mA

25

°C

45

70

Full range

85

25

°C

2.7

2.85

V

Full range

2.95

25

°C

85

100

115

Oscillator frequency

kHz

Full range

80

120

25

°C

1.214

1.23

1.246

Measured at FEEDBACK,

Reference voltage

V

Full range

1.206

1.254

Reference voltage line regulation

25

°C

0.5

mV

25

°C

100

300

Error amplifier input bias current

nA

Full range

800

25

°C

2400

3700

4800

Error amplifier transconductance

µmho

Full range

1600

5800

25

°C

500

800

Error amplifier voltage gain

V/V

Full range

250

25

°C

2.2

2.4

Full range

2

Error amplifier output swing

V

25

°C

0.3

0.4

Full range

0.55

25

°C

±130

±200

±300

Error amplifier output current

µA

Full range

±90

±400

25

°C

2.5

5

7.5

Soft-start current

µA

Full range

1.5

9.5

25

°C

88

90

D

Maximum duty cyle

%

Full range

84

Switch transconductance

25

°C

12.5

A/V

25

°C

10

300

Switch leakage current

µA

Full range

600

25

°C

0.5

0.7

Switch saturation voltage

V

Full range

0.9

25

°C

3.7

4.3

5.3

NPN switch current limit

A

Full range

3

6

(1)

A 1-M

Ω resistor is connected to the compensation pin (which is the error amplifier output) to ensure accuracy in measuring A

actual applications, this load resistance should be

≥10 MΩ, resulting in A

4

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