1357 Просмотр технического описания (PDF) - Linear Technology

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производитель

1357

1.5A/ 500kHz Step-Down Switching Regulators

Linear Technology 

LT1357

TYPICAL PERFORMANCE CHARACTERISTICS

Total Harmonic Distortion

vs Frequency

0.01

TA = 25°C

VO = 3VRMS

RL = 2k

0.001

AV = –1

AV = 1

0.0001

10

100

1k

10k

FREQUENCY (Hz)

100k

1357 G25

2nd and 3rd Harmonic Distortion

vs Frequency

–30

VS = ±15V

–40

VO = 2VP-P

RL = 2k

AV = 2

3RD HARMONIC

–50

–60

–70

2ND HARMONIC

–80

–90

100k 200k 400k

1M 2M

FREQUENCY (Hz)

4M 10M

1357 G28

Small-Signal Transient

(AV = 1)

Undistorted Output Swing vs

Frequency (±15V)

30

AV = –1

25

AV = 1

20

15

10

VS = ±15V

5

RL = 2k

AV = 1, 1% MAX DISTORTION

AV = –1, 2% MAX DISTORTION

0

100k

1M

FREQUENCY (Hz)

Differential Gain and Phase

vs Supply Voltage

DIFFERENTIAL GAIN

10M

1357 G26

0.15

0.10

0.50

0.05

DIFFERENTIAL PHASE

0.45

0.40

0.35

±5

AV = 2

RL = 1k

TA = 25°C

±10

±15

SUPPLY VOLTAGE (V)

1354 G29

Small-Signal Transient

(AV = –1)

Undistorted Output Swing vs

Frequency (±5V)

10

8

AV = –1

AV = 1

6

4

2 VS = ±5V

RL = 2k

2% MAX DISTORTION

0

100k

1M

FREQUENCY (Hz)

10M

1357 G27

Capacitive Load Handling

100

VS = ±15V

TA = 25°C

AV = 1

50

AV = –1

0

10p 100p 1000p 0.01µ 0.1µ 1µ

CAPACITIVE LOAD (F)

1357 G30

Small-Signal Transient

(AV = –1, CL = 1000pF)

8

1357 TA31

1357 TA32

1357 TA33

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