Datasheet > LTC3809

LTC3809

更新时间： 2023-12-20 18:46:22

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
24页	291K
描述
No RSENSE?、低 EMI、同步 DC/DC 控制器

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数据手册

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LTC3809 数据手册

LTC3809

TYPICAL PERFORMANCE CHARACTERISTICS ^T_A^{= 25°C unless otherwise noted.}

Maximum Current Sense Voltage

vs I_THPin Voltage

Efﬁciency vs Load Current

100

FIGURE 10 CIRCUIT

Burst Mode OPERATION

= 2.5V

OUT

= 5V, V

= 2.5V

(I RISING)

OUT

Burst Mode OPERATION

= 3.3V

(I FALLING)

OUT

FORCED CONTINUOUS

MODE

BURST MODE

(SYNC/MODE =

PULSE SKIPPING

MODE

= 1.2V

OUT

)

FORCED

CONTINUOUS

(SYNC/MODE = 0V)

= 1.8V

OUT

PULSE SKIPPING

(SYNC/MODE = 0.6V)

SYNC/MODE = V

= 5V

–20

0.5

1.5

VOLTAGE (V)

100

10k

100

10k

LOAD CURRENT (mA)

3809 G01

3809 G02

3809 G03

Load Step

(Burst Mode Operation)

Load Step

(Forced Continuous Mode)

OUT

200mV/DIV

AC COUPLED

2A/DIV

3809 G05

3809 G04

100μs/DIV

= 3.3V

OUT

= 1.8V

= 300mA TO 3A

LOAD

SYNC/MODE = 0V

LOAD

SYNC/MODE = V

FIGURE 10 CIRCUIT

Load Step (Pulse-Skipping Mode)

Start-Up with Internal Soft-Start

OUT

200mV/DIV

OUT

AC COUPLED

1.8V

500mV/DIV

2A/DIV

3809 G07

3809 G06

200μs/DIV

100μs/DIV

= 4.2V

LOAD

= 3.3V

OUT

= 1Ω

= 1.8V

FIGURE 10 CIRCUIT

= 300mA TO 3A

SYNC/MODE = V

FIGURE 10 CIRCUIT

3809fc

1 2 345 6 7...24

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