This datasheet introduces Microchip TC1303A/TC1303B/TC1303C/TC1304 dual-output power regulator products, including synchronous buck regulator, low dropout regulator, power good monitor, etc.
The TC1303/TC1304 family combines a 500 mA synchronous buck regulator and a 300 mA low‑dropout regulator (LDO) in a single 10‑lead DFN or MSOP package. The integrated power‑good function provides a 300 ms delay for processor reset and can monitor the buck output, the LDO output, or both.
Typical applications include cellular phones, portable computers, USB‑powered devices, handheld medical instruments, organizers and PDAs. Electrical specifications such as efficiency, dropout voltage and protection features are listed in the DC characteristics sections.
| Buck Regulator Output Current | 500 mA |
|---|---|
| LDO Output Current | 300 mA |
| Typical Efficiency | Over 90 % |
| Fixed‑Frequency PWM | 2.0 MHz |
| LDO Dropout Voltage | 137 mV @ 200 mA |
| Power‑Good Delay | 300 ms |
| Package Options | 10‑lead DFN or MSOP |
| Operating Junction Temperature | -40 °C to +125 °C |
The power‑good output includes a 300 ms delay, which is used for processor reset.
They are offered in a 10‑lead DFN package or a 10‑lead MSOP package.
The buck regulator achieves over 90 % typical efficiency.
The LDO dropout voltage is 137 mV typical at a 200 mA load.