DC-­‐DC  BOOST  CONVERTER  STAMP  –  TPS61093  

DATA  SHEET  

Version:  1.0  

 Copyright  ©  2015  All  rights  reserved  

 

   MAIRO  LEIER   1  

 

Table  of  Contents  Description  .............................................................................................................................................................................  2  

Key  Features  .....................................................................................................................................................................  2  

Physical  Dimensions  ...........................................................................................................................................................  4  

Version  History  .....................................................................................................................................................................  6  

 

   

   MAIRO  LEIER   2  

 

Description    This  is  a  stamp  module  for  TPS61093  boost  converter.  The  device  is  a  1.2-­‐MHz,  fixed-­‐frequency  boost  converter  designed  for  high  integration  and  high  reliability.  

The   IC   integrates  a  20-­‐V  power  switch,   input/output   isolation  switch,  and  power  diode.  When  the  output   current   exceeds   the  over   load   limit   (in   case  of   short,   for   example),   the   IC   isolation  switch   opens   up   to   disconnect   the   output   from   the   input.   This   protects   the   IC   and   the   input  supply.   The   isolation   switch   also   disconnects   the   output   from   the   input   during   shutdown   to  minimize  leakage  current.  When  the  IC  is  shutdown,  the  output  capacitor  is  discharged  to  a  low  voltage  level  by  internal  diodes.  With  its  1.6-­‐V  minimum  input  voltage,  the  IC  can  be  powered  by  two  alkaline  batteries,  a  single  Li-­‐ion  battery,  or  3.3-­‐V  and  5-­‐V  regulated  supply.  

The  module  features  voltage  set-­‐up  pins,  which  can  be  used  to  set  the  output  to  one  of  the  four  predefined  voltage  levels:  3.3V,  5.0V,  7.6V  and  12V.  Also  you  can  use  an  external  pull-­‐up  resistor  to   set   your   own   output   voltage,   if   needed.  Module   can   be   brought   to   sleep   with   power  consumption  <1  μA  using  EN  pin.  The  efficiency  of  the  TPS61093  can  be  improved  by  connecting  the  load  to  the  VO  pin  instead  of  the  VOUT  pin.  You  might  want  to  take  into  account  that  VOUT  pin  features  double  filtering  to  remove  both  high-­‐  and  low-­‐frequency  noise,  while  VO  uses  single  filter   capacitor.   The   last,   but  not   the   least   is   that   by  default  VOUT   is   isolated   from  VIN.   If   you  need   non-­‐isolated   output,   then   connect   VO   and   VOUT   together.   Please   check   the   module  schematic  below  for  pin  name  references.  

 Module  Features  

• Input  Range:  1.6V  to  6V  • Selectable  Output  Voltage:  3.3V,  5.0V,  7.6V,  12V  and  custom.  • Filtering  of  power  lines  • Output  voltage  isolation  • Sleep  mode  input  • TPS61093  boost  converter  

Chip  Features  • Integrated  Power  Diode  and  Isolation  FET  for  reliability  • 20V  Internal  Switch  FET  With  a  1.1A  Current  • Fixed  1.2MHz  Switching  Frequency  • Up  to  88%  Efficiency  at  15V  Output  • Overload  and  Overvoltage  Protection  • Programmable  Soft  Start-­‐up  • Load  Discharge  Path  After  IC  Shutdown  

 

 

   MAIRO  LEIER   3  

 

Pinout  and  Terminal  Description  

 

Figure  1:  DC-­‐DC  Boost  Converter  Stamp–  TPS61093  

 

Table  1:  Terminal  Descriptions  

Pin   Name   Description  

1   GND   Ground  of  the  module  

2   VIN   Supply  voltage  input  1.6V  –  6V  

3   EN   Enable  pin  (HIGH  =  enable).  When  the  pin  is  pulled  low  for  1ms,  the  module  turns  off  and  consumes  less  than  1-­‐uA  current.  Maximum  input  voltage  6V.  

4   VO   Output  of  the  boost  converter.    

5   VOUT   Connect  load  to  this  pin  for  input/output  isolation  during  module  shutdown.  Isolation  switch  is  between  this  pin  and  VO  pin.  Connect  to  VO  pin  to  get  non-­‐isolated  output  voltage.  

6   GND   Ground  of  the  module  

7   R1C   Resistor  divider  to  program  regulated  output  voltage.  *  

8   R1B   Resistor  divider  to  program  regulated  output  voltage.  *  

9   R1A   Resistor  divider  to  program  regulated  output  voltage.  *  

10   FB   Voltage  feedback  pin  for  output  regulation.  An  external  resistor  divider  (included  in  the  module)  connected  to  this  pin  programs  the  regulated  output  voltage.  *  

*  See  Table  2  for  details  

 

               

   MAIRO  LEIER   4  

 

Table  2:  Setting  Up  Output  Voltage  

Output  Voltage  

Pin  Numbers   Pin  Names   Description  

3.3V   10+7+8+9   FB+R1C+R1B+R1A   Connect  pin  FB  with  R1C,  R1B  and  R1A  

5.0V   10+7   FB+R1C   Connect  pin  FB  with  R1C.  R1B  and  R1A  leave  unconnected.  

7.6V   10+8+9   FB+R1B+R1A   Connect  pin  FB  with  R1B  and  R1A.  R1C  leave  unconnected.  

12.0V   10+8   FB+R1B   Connect  pin  FB  with  R1B.  R1A  and  R1C  leave  unconnected.  

Custom   10+ext+5   FB+<ext>+VOUT   Connect  a  pull-­‐up  resistor  between  FB  and  VOUT  to  get  your  own  custom  output  voltage.  Use  equation  below  the  table  to  calculate  the  resistance  required.  

 Equations  for  custom  output  voltage  Because   our   module   already   has   one   of   the   resistors   installed   on-­‐board.   The   equation   for  calculation  of   the  pull-­‐up  resistor  given   in   the  TPS61093  datasheet  becomes  constrained.  First  calculate  required  value  using  the  following  equation  and  then  take  a  resistor  with  the  nearest  available  value:  

R=  20*Vout  –  1  

,where  R  is  the  pull-­‐up  resistor  value  in  kOhms  and  Vout  is  output  voltage  in  Volts.  

   

   MAIRO  LEIER   5  

 

 

Physical  Dimensions    

 

 

 

                         

Figure  2:  Physical  dimensions  and  pinout  (top  view)      

   MAIRO  LEIER   6  

 

Version  History    

VERSION   COMMENT  

1.0   Initial  version