# bulk

* [LM2596](#lm2596)
* [AMS1117](#ams1117)

[More](https://book.ferro.pro/elec/..#buck--boost)

| Chips   | Input                  | Output      | Current | Leakage Current | mΩ |
| ------- | ---------------------- | ----------- | ------- | --------------- | -- |
| LM2596  | 4.5 - 40               | 1.2 - 37    | 3A      | < 50 µA         |    |
| AMS1117 | 18 / max 30 / drop 1.3 | 1.25 to 12V | 1.4A    | Standby = 2mA   |    |

## LM2596

5-Pin TO-220/263 | <https://www.ti.com/lit/ds/symlink/lm2596.pdf>

* 1/2/3 = In/Out/Gnd
  * Out = Ref(1.23V) \* ( 1 + R2 / R1 )
* 4: FB | –0.3 to 25 V
* 5: ON = low < 1.3V | OFF = cmax 25V

## AMS1117

3-Pin SOT-223: <https://datasheet.lcsc.com/szlcsc/2001081204\\_Shikues-AMS1117-1-2\\_C475600.pdf>

* 3/2: In/Out
* 1: Gnd or ADJ ( Vout=1.25×(1+R2/R1)+IAdj×R2 , can ignore IAdj )