Datasheet > LTC3523

LTC3523

更新时间： 2023-12-20 18:46:25

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
16页	257K
描述
同步 600mA 升压和 400mA 降压型 DC/DC 转换器

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中文翻译

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数据手册

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LTC3523 数据手册

LTC3523/LTC3523-2

Synchronous 600mA Step-Up

and 400mA Step-Down

DC/DC Converters

FEATURES

DESCRIPTION

The LTC^®3523/LTC3523-2 combine a 600mA step-up

DC/DC converter with a 400mA synchronous step-down

DC/DC converter in a tiny 3mm × 3mm package. The

1.2MHz/2.4MHz switching frequencies minimize the

solution footprint while maintaining high efﬁciency. Both

converters feature soft-start and internal compensation,

simplifying the design.

Dual High Efﬁciency DC/DC Converters:

Step-Up (V

= 1.8V to 5.25V, I = 600mA)

OUT

Step-Down (V

= 0.615V to 5.5V, I

= 400mA)

OUT

1.8V to 5.5V Input Voltage Range

Up to 94% Efﬁciency

Pin Selectable Burst Mode^®Operation

45μA Quiescent Current in Burst Mode Operation

1.2MHz (LTC3523) or 2.4MHz (LTC3523-2)

Switching Frequency

Both the step-up and step-down converters are current

mode controlled and utilize an internal synchronous rec-

tiﬁer for high efﬁciency. The step-up supports 0% duty

cycle operation and the step-down converter supports

100% duty cycle operation to extend battery run time.

If the MODE pin is held high, both converters automati-

cally transition between Burst Mode operation and PWM

operation improving light load efﬁciency. Fixed, low noise

1.2MHz/2.4MHz PWM operation is selected when MODE

is grounded.

Independent Power Good Indicator Outputs

Integrated Soft-Start

Thermal and Overcurrent Protection

<3μA Quiescent Current in Shutdown

Small 16-Lead 3mm × 3mm × 0.75mm QFN Package

APPLICATIONS

Digital Cameras

The LTC3523/LTC3523-2 provide a sub-3μA shutdown

mode, overtemperature shutdown and current limit pro-

tection on both converters. The LTC3523/LTC3523-2 are

housedina16-lead3mm×3mm×0.75mmQFNpackage.

Medical Instruments

Industrial Handhelds

GPS Navigators

L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

TYPICAL APPLICATION

LTC3523 Efﬁciency and Power

Loss vs Load Current

1.8V TO 3.2V

100

1000

100

2-CELL

ALKALINE

47μF

4.7μH

OUT2

BAT

IN1

IN2

4.7μH

STEP-DOWN

OUTPUT

1.2V

10μF

EFFICIENCY

SW1

SW2

FB2

OUT1

10pF

511k

STEP-UP

OUTPUT

3.3V

200mA

P0WER LOSS

OUT

LTC3523

FB1

MODE

634k

10μF

200mA

= 2.4V

PGOOD1

SHDN1

PGOOD2

SHDN2

= 3.3V

= 1.2V

OUT1

OUT2

365k

GND1 GND2 GND3

= 1.2MHz

OSC

STEP-UP

STEP-DOWN

100

OFF ON

3523 TA01a

0.1

1000

LOAD CURRENT (mA)

3523 TA01b

3523fb

12 3 4 5 6 7...16

中文翻译

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与LTC3523相关器件

型号	品牌	获取价格	描述	数据表
LTC3523_15	Linear	获取价格	Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters
LTC3523-2	Linear	获取价格	Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters
LTC3523-2_15	Linear	获取价格	Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters
LTC3523EUD-2-PBF	Linear	获取价格	Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters
LTC3523EUD-2-TRPBF	Linear	获取价格	Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters
LTC3523EUD-PBF	Linear	获取价格	Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters
LTC3523EUD-TRPBF	Linear	获取价格	Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters
LTC3524	Linear	获取价格	Adjustable TFT Bias Supply with WLED Driver
LTC3524	ADI	获取价格	具白光 LED 驱动器的可调 TFT 偏置电源
LTC3524EUF	Linear	获取价格	Adjustable TFT Bias Supply with WLED Driver

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