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The  MP1583  is  a  step-down  regulator  with  a  built in  internal  Power  MOSFET.  It 
achieves  3A continuous  output  current  over  a  wide  input supply  range  with  excellent 
load and line regulation.
Current  mode  operation  provides  fast  transient response  and  eases  loop  stabilization.
Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown.
Adjustable  soft-start  reduces  the  stress  on  the input  source  at  turn-on.  In  shutdown 
mode the regulator draws 20µA of supply current.
The MP1583 requires a minimum number of readily available external components to
complete a 3A step down DC to DC converter solution.

 3A Output Current

 Programmable Soft-Start

 100mΩ Internal Power MOSFET Switch

 Stable with Low ESR Output Ceramic Capacitors

 Up to 95% Efficiency

 20µA Shutdown Mode

 Fixed 385KHz frequency

 Thermal Shutdown

 Cycle-by-Cycle Over Current Protection

 Wide 4.75 to 23V operating Input Range

 Output Adjustable From 1.22 to 21V

 Under Voltage Lockout

 Available in 8 pin SOIC Package

 3A Evaluation Board Available

The MP2112 is a 1MHz constant frequency, current mode, PWM step-down converter. 
The device  integrates  a  main  switch  and  a synchronous  rectifier  for  high  efficiency 
without an  external  Schottky  diode.  It  is  ideal  for powering  portable  equipment  that 
powered by a single cell Lithium-Ion (Li+) battery. The MP2112 can supply 1A of load 
current from a 2.5V to 6V input voltage. The output voltage can be regulated as low as 
0.6V. The MP2112 can also run at 100% duty cycle for low dropout applications.
The MP2112 is available in a space-saving 6-pin QFN package.

 High Efficiency: Up to 95%

 1MHz Constant Switching Frequency

 1A Available Load Current

 2.5V to 6V Input Voltage Range

 Output Voltage as Low as 0.6V

 100% Duty Cycle in Dropout

 Current Mode Control

 Short Circuit Protection

 Thermal Fault Protection

 <0.1µA Shutdown Current

 Space Saving 3mm x 3mm QFN6 Package

The  ST7LITE49M  is  a  member  of  the  ST7  microcontroller  family.  All  ST7  devices  are 
based on a common industry-standard 8-bit core, featuring an enhanced instruction set.
The  ST7LITE49M  features  FLASH  memory  with  byte-by-byte  In-Circuit  Programming 
(ICP) and  In-Application  Programming  (IAP)  capability. Under  software  control,  the 
ST7LITE49M  device  can  be  placed  in  Wait,  Slow,  or  Halt  mode, reducing  power 
consumption when the application is in idle or standby state. The enhanced instruction 
set  and  addressing  modes  of  the  ST7  offer  both  power  and flexibility  to  software 
developers,  enabling  the  design  of  highly  efficient  and  compact application  code.  In 
addition  to  standard  8-bit  data  management,  all  ST7  microcontrollers feature  true  bit 
manipulation,  8x8  unsigned  multiplication  and  indirect  addressing  modes. The 
ST7LITE49M features an on-chip Debug Module (DM) to support In-Circuit Debugging
(ICD). For  a  description  of the  DM registers,  refer  to the  ST7  ICC  Protocol  Reference
Manual.

 Memories:  4  Kbytes  single  voltage  extended  Flash (XFlash)  Program  memory 

with Read-out protection In-Circuit Programming and In-Application programming 
(ICP and IAP) Endurance: 10K write/erase cycles guaranteed Data retention: 20 
years  at  55  °C,  384  bytes  RAM,  128  bytes  data  EEPROM  with  read-out
protection, 300K write/erase cycles guaranteed, data retention: 20 years at 55 °C.

 Clock, Reset and Supply Management: 3-level low voltage supervisor (LVD) for

main supply and an auxiliary voltage detector (AVD) for safe power-on/off, Clock 
sources:  Internal  trimmable  8  MHz RC  oscillator,  auto  wake-up  internal  low
power, low frequency oscillator, crystal/ceramic resonator or external clock, Five 
power saving modes: Halt, Active-Halt, Auto Wake-up from Halt, Wait and Slow

 I/O Ports: Up to 24 multifunctional bidirectional I/Os, 8 high sink outputs

 5  timers:  Configurable  watchdog  timer,  Dual  8-bit  Lite  Timers  with  prescaler, 1 

real time base and 1 input capture, Dual 12-bit Auto-reload Timers with 4 PWM
outputs, input capture, output compare, dead-time generation and enhanced one
pulse mode functions

 Communication interface: I²C multimaster interface

 A/D converter: 10 input channels

 Interrupt management: 13 interrupt vectors plus TRAP and RESET

 Instruction set:  8-bit data manipulation,  63 basic instructions with illegal opcode

detection, 17 main addressing modes, 8 x 8 unsigned multiply instructions

 Development tools: Full HW/SW development package, DM (Debug Module)