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LTC3101

更新时间： 2024-09-25 11:45:59
品牌 Logo 应用领域
Linear Systems 稳压器
页数 文件大小 规格书
50页 559K
描述
8-Output Regulator with Sequencing and I2C

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LTC3101 数据手册

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LTC3589/LTC3589-1/  
LTC3589-2  
8-Output Regulator with  
2
Sequencing and I C  
FEATURES  
DESCRIPTION  
2
n
Triple I C Adjustable High Efficiency Step-Down DC/  
The LTC®3589 is a complete power management solu-  
tion for ARM and ARM-based processors and advanced  
portable microprocessor systems. The device contains  
three step-down DC/DC converters for core, memory and  
SoC rails, a buck-boost regulator for I/O at 1.8V to 5V and  
three 250mA LDO regulators for low noise analog sup-  
DC Converters: 1.6A, 1A/1.2A, 1A/1.2A  
n
High Efficiency 1.2A Buck-Boost DC/DC Converter  
n
Triple 250mA LDO Regulators  
n
Pushbutton ON/OFF Control with System Reset  
n
Flexible Pin-Strap Sequencing Operation  
2
2
n
plies. An I C serial port is used to control enables, output  
I C and Independent Enable Control Pins  
n
n
n
n
n
n
voltage levels, dynamic voltage scaling, operating modes  
and status reporting. Differences between the LTC3589,  
LTC3589-1, and LTC3589-2 are summarized in Table 1.  
Power Good and Reset Outputs  
Dynamic Voltage Scaling and Slew Rate Control  
Selectable 2.25MHz or 1.12MHz Switching Frequency  
Always-Alive 25mA LDO Regulator  
8μA Standby Current  
Regulator start-up is sequenced by connecting outputs to  
enable pins in the desired order or programmed via the  
2
40-Pin 6mm × 6mm × 0.75mm QFN  
I Cport. Systempower-on, power-off, andresetfunctions  
2
are controlled by pushbutton interface, pin inputs, or I C  
APPLICATIONS  
interface.  
n
Handheld Instruments and Scanners  
The LTC3589 supports i.MX53/51, PXA and OMAP pro-  
cessors with eight independent rails at appropriate power  
levels. Other features include interface signals such as  
the VSTB pin that simultaneously toggle up to four rails  
between programmed run and standby output voltages.  
The device is available in a low profile 40-pin 6mm × 6mm  
exposed pad QFN package.  
n
Portable Industrial Devices  
n
Automotive Infotainment  
n
Medical Devices  
n
High End Consumer Devices  
n
Multirail Systems  
n
Supports Freescale i.MX53/51, Marvell PXA and  
Other Application Processors  
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks  
of Linear Technology Corporation. All other trademarks are the property of their respective  
owners.  
TYPICAL APPLICATION  
V
2.7V TO 5.5V  
Start-Up Sequence  
IN  
1μH  
V
IN  
0.5V TO V  
0.8V TO V  
IN  
IN  
IN  
IN  
SW1  
SW2  
SW3  
LDO1_STDBY  
AT 1.6A  
AT 25mA  
BB_OUT  
22μF  
22μF  
1μF  
WAKE  
(1V/DIV)  
1.5μH  
1.5μH  
0.5V TO V  
AT 1A  
0.36V TO V  
IN  
AT 250mA  
LDO2  
SW2  
1μF  
1μF  
LTC3589  
LDO3  
SW3  
0.5V/DIV  
1.8V  
AT 250mA  
0.5V TO V  
AT 1A  
LDO3  
LDO4  
22μF  
22μF  
LDO2  
SW1  
2.8V  
AT 250mA  
2.7μH  
3
SW4AB  
SW4CD  
1μF  
2
I C  
7
3589 TA01b  
500μs/DIV  
ENABLES  
PWR_ON  
1.8V TO 5V  
BB_OUT  
WAKE  
4
ON  
STATUS  
GND  
3589 TA01a  
3589fe  
1
1234567...50

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