Microchip MIC7400 Manual


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2017 Microchip Technology Inc. DS20005887A-page 1
MIC7400
Features
Input Voltage: 2.4V to 5.5V
Five Independent Synchronous Bucks up to 3A
One Independent Non-Synchronous Boost
200 mA
200 µA Quiescent Current (All Regulators On)
93% Peak Buck Efficiency, 85% Typical Efficiency
at 1 mA
Dual Power Modes: Stand-by and Normal Mode
• I2C Interface up to 3.4 MHz
• I2C On-the-Fly EEPROM Programmability,
Featuring:
- Buck and Boost Output Voltage Scaling
- Power-on-Reset Threshold and Delay
- Power-Up Sequencing/Sequencing Delay
- Buck and Boost Current-Limit
- Buck and Boost Pull-Down when Disabled
- Individual ON, OFF, and Stand-by Modes
- Soft-Start and Global Power-Good Masking
23 µA Buck Typical Quiescent Current
70 µA Boost Typical Quiescent Current
1.5% Output Accuracy over
Temperature/Line/Load
2.0 MHz Boost Switching Frequency
1.3 MHz Buck Operation in Continuous Mode
Ultra-Fast Buck Transient Response
15 mm x 15 mm x 1.25 mm Solution Size
Thermal Shutdown and Current-Limit Protection
36-Pin 4.5 mm x 4.5 mm x 0.85 mm FQFN
Package (0.4 mm Pitch)
–40°C to +125°C Junction Temperature Range
Applications
Client and Enterprise Solid State Drives (SSD)
Consumer and In-Vehicle Infotainment Devices
Multimedia Devices
Portable Handheld Devices
Security Cameras
Gaming Machines
Service Provider Gateways
General Description
The MIC7400 is a powerful, highly integrated,
configurable, power management IC (PMIC) featuring
five synchronous buck regulators, one boost regulator
and high-speed I2C interface with an internal
EEPROM.
The device offers two distinct modes of operation—
“stand-by mode” and “normal mode”—intended to
provide an energy-optimized solution suitable for
portable handheld, and infotainment applications.
In normal mode, the programmable switching
converters can be configured to support a variety of
features, including start-up sequencing, timing,
soft-start ramp, output voltage levels, current-limit
levels and output discharge for each channel.
In stand-by mode the PMIC can be configured in a low
power state by either disabling an output or by
changing the output voltage to another voltage level,
either lower or higher than normal-mode. In general, it's
assumed that the voltage in standby mode is lower than
the one in normal mode. Independent exit from
stand-by mode can be achieved either by I
2C
communication or the external STBY pin.
The device has five synchronous buck regulators with
high-speed adaptive on-time control supporting even
the challenging ultra-fast transient requirement for
Core supplies. One boost regulator provides a flash
memory programming supply that delivers up to
200 mA of output current. The boost is equipped with
an output disconnect switch that opens if a
short-to-ground fault is detected.
An internal EEPROM enables a single-chip solution
across many platforms by allowing the designer to
customize the PMIC for their design. Modifications can
be made without the need to re-approve a new PMIC,
saving valuable design resources and time.
All switchers provide light load efficiency with
HyperLight Load® mode for buck and PFM mode for
boost. An additional benefit of this proprietary
architecture is very low output ripple voltage throughout
the entire load range with the use of small output
capacitors. The MIC7400 is designed for use with a
small inductors (down to 0.47 µH for buck, 1.5 µH for
boost), and an output capacitor as small as 10 µF for
buck, enabling a total solution size of 15 mm x 15 mm
and less than 1 mm height.
Configurable PMIC, Five Channel Buck Regulator Plus One Boost
with HyperLight Load® and I2C Control


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MIC7400

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