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參數(shù)資料
| 型號： | LTC3589EUJ-1#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 2600 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封裝： | 6 X 6 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-40 |
| 文件頁數(shù)： | 1/46頁 |
| 文件大小： | 570K |
| 代理商： | LTC3589EUJ-1#PBF |
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LTC3589/LTC3589-1
1
3589fc
TYPICAL APPLICATION
FEATURES
DESCRIPTION
APPLICATIONS
The LTC3589/LTC3589-1 are complete power manage-
ment solutions 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 supplies. An I2C serial port is used to control
enables, output voltage levels, dynamic voltage scaling,
operating modes and status reporting. Differences between
the LTC3589 and LTC3589-1 are summarized in Table 1.
Regulator start-up is sequenced by connecting outputs to
enable pins in the desired order or via the I2C port. System
power-on, power-off, and reset functions are controlled by
pushbutton interface, pin inputs, or I2C interface.
The LTC3589/LTC3589-1 support i.MX, PXA and OMAP
processors with eight independent rails at appropriate
power levels. Other features include interface signals
such as the VSTB pin that simultaneously toggle 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.
Start-Up Sequence
n Triple I2C Adjustable High Efficiency Step-Down DC/
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
n I2C and Independent Enable Control Pins
n Power Good and Reset Outputs
n Dynamic Voltage Scaling and Slew Rate Control
n Selectable 2.25MHz or 1.12MHz Switching Frequency
n Always-Alive 25mA LDO Regulator
n 8μA Standby Current
n 40-Pin 6mm
× 6mm × 0.75mm QFN
n Handheld Instruments and Scanners
n Portable Industrial Devices
n Automotive Infotainment
n Medical Devices
n High End Consumer Devices
n Multirail Systems
n Supports Freescale i.MX, 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.
8-Output Regulator with
Sequencing and I2C
LDO1_STDBY
VIN 2.7V TO 5.5V
1μH
1μF
1.5μH
2.7μH
SW1
SW2
SW3
SW4CD
BB_OUT
SW4AB
LTC3589/LTC3589-1
0.8V TO VIN
AT 25mA
0.5V TO VIN
AT 1.6A
22μF
0.5V TO VIN
AT 1A
0.5V TO VIN
AT 1A
0.36V TO VIN
AT 250mA
1.8V
AT 250mA
2.8V
AT 250mA
3589 TA01a
VIN
LDO2
LDO3
LDO4
GND
I2C
ENABLES
PWR_ON
ON
3
4
7
STATUS
WAKE
1.8V TO 5V
500μs/DIV
0.5V/DIV
3589 TA01b
BB_OUT
WAKE
(1V/DIV)
LDO2
SW3
SW1
SW2
LDO3
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