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LTC3589 - 8-Output Regulator with Sequencing and I2C

Analog Devices

LTC3589 - 8-Output Regulator with Sequencing and I2C RSS Sample
  • Darmowa próbka
Kod:
LTC3589
Producent:
Linear Technology
Dodany do bazy:
Ostatnio widziany:

The LTC®3589 is a complete power management solution 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, LTC3589-1, and LTC3589-2 are summarized in Table 1.

Regulator start-up is sequenced by connecting outputs to enable pins in the desired order or programmed via the I2C port. System power-on, power-off, and reset functions are controlled by pushbutton interface, pin inputs, or I2C interface.

The LTC3589 supports i.MX53/51, 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 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. LTC3589LTC3589-1LTC3589-2Power-On Inhibit Enable Delay 1 second 2ms 2ms Buck 2 & 3 Current Output 1A 1.2A 1.2A PGOOD Fault Timeout Enabled Default, I2C Disable Disabled by Default, I2C Enable Disabled by Default, I2C Enable PWRON to WAKE Delay 50ms 2ms 2ms LDO3 Vout 1.8V 2.8V 2.8V LDO4 Vout 1.8V, 2.5V, 2.8V, 3.3V 1.2V, 1.8V, 2.5V, 3.2V 1.2V, 1.8V, 2.5V, 3.2V LDO4 Vout 1.8V, 2.5V, 2.8V, 3.3V 1.2V, 1.8V, 2.5V, 3.2V 1.2V, 1.8V, 2.5V, 3.2V Default LDO4 Enable LDO34EN (Pin) or I2C I2C Only I2C Only Wait to Enable Until Output < 300mV Yes. Change with I2C Yes. Change with I2C No. Change with I2C Insert 2.5K Discharge Resistor When Disabled Yes when Wait to Enable Until Output < 300mV Yes when Wait to Enable Until Output < 300mV Always inserted when regulator disabled

* Triple I2C Adjustable High Efficiency Step-Down DC/DC Converters: 1.6A, 1A/1.2A, 1A/1.2A

* High Efficiency 1.2A Buck-Boost DC/DC Converter

* Triple 250mA LDO Regulators

* Pushbutton ON/OFF Control with System Reset

* Flexible Pin-Strap Sequencing Operation

* I2C and Independent Enable Control Pins

* 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

* 40-Pin 6mm × 6mm × 0.75mm QFN

* Click here for Freescale i.MX53 reference design and driver support information

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