LT1946A Ver la hoja de datos (PDF) - Linear Technology

Número de pieza

componentes Descripción

Fabricante

LT1946A

2.7MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start

Linear Technology 

LT1946A

TYPICAL PERFOR A CE CHARACTERISTICS

Feedback Pin Voltage

1.28

1.27

1.26

1.25

1.24

1.23

1.22

1.21

1.20

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1946A G01

Switch Saturation Voltage

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6

SWITCH CURRENT (A)

1946A G04

Transient Response for

Figure 1 Circuit

Oscillator Frequency

3000

2700

2400

2100

TA = –30°C

TA = 100°C

1800

1500

1200

TA = 25°C

900

600

300

0

0 0.2 0.4 0.6 0.8 1 1.2

FEEDBACK VOLTAGE (V)

1946A G02

Current Limit

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1946A G03

Quiescent Current

Switching Waveforms for

Figure 1 Circuit

4.0

3.8

VOUT

100mV/DIV

3.6

AC COUPLED

3.4

VSW

10V/DIV

3.2

0V

3.0

2.8

ILI

0.5A/DIV

2.6

100ns/DIV

2.4

2.2

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1946A G05

1946A G06

Start-Up Waveforms for

Figure 1 Circuit

VOUT

100mV/DIV

AC COUPLED

VOUT

2V/DIV

ILI

0.5A/DIV

ILOAD

250mA

150mA

50µs/DIV

1946A G07

IIN

200mA/DIV

0A

VSHDN

5V

0V

RLOAD = 250Ω

1ms/DIV

1946A G08

sn1946a 1946afs

3

Share Link: