The PW2312 is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 1.5A peak output current over a wide input supply range, with excellent load and line regulation.
Schematic PW2312 circuit step-down DC DC converter
Low-cost buck circuit with 4-30V input
Low-cost (0.31 yuan) synchronous rectification buck circuit, with overcurrent protection, overvoltage protection, 4-30V input, maximum current of 1.2A, peak current of 1.5A, static current of 5mA, 0.8V reference source.
For input voltages less than 15V, replace CIN with a 22uF 50V rated X7R ceramic capacitor. For input voltages greater than 15V, use a 100uF 6.3×5.4 35V rated aluminum electrolytic capacitor.
Output voltages:
- 3.30V: R1 47K, R2 15K
- 5.01V: R1 79K, R2 15K
- 6.00V: R1 130K, R2 20K
- 9.01V: R1 154K, R2 20K
- 12.00V: R1 210K, R2 15K
- 15.04V: R1 267K, R2 15K
BOM PW2312 circuit step-down DC-DC converter
| Parts | Value | Description | Quantity |
| Capacitors | |||
| C1 | 0.1u | C0603 — SMD capacitor | 1 |
| C2 | 22pf | C0603 — SMD capacitor | 1 |
| CF1,CF2 | 0.1uF | C0603 — SMD capacitor | 2 |
| CIN | 100UF/35V | 6.3×6.6 SMD Electrolytic capacitor | 1 |
| COUT1,COUT2 | 22uF | C0805 — SMD inductor | 2 |
| L1 | 10uH | SMD,7.8×7 mm Power Inductor | 1 |
| Resistors 1/4W 5% | |||
| R1 | 79k 1% | R0603 — SMD Resistor | 1 |
| R2 | 15k 1% | R0603 — SMD Resistor | 1 |
| REN | 100k | R0603 — SMD Resistor | 1 |
| Semiconductors | |||
| U1 | PW2312A | SOT-23-6 30V, Synchronous Step Down Regulator | 1 |
Download files, links, and notes
Source: https://oshwhub.com/r1272170918/pw2312-xiang-ya-dian-lu
