APW7067N
APW7067N is Synchronous Buck PWM and Linear Controller manufactured by Anpec Electronics Coropration.
Features
- Provided Two Regulated Voltages
- Synchronous Buck Converter
- Linear Regulator
- Single 12V Power Supply Required
- Excellent Both Output Voltage Regulation
- 0.8V Internal Reference
- ±1% Over Line Voltage and Temperature
- Integrated Soft-Start for PWM and Linear Outputs
- Programmable Frequency Range from 150k Hz to 1000k Hz
- Voltage Mode PWM Control Design and Up to 89% (Typ.) Duty Cycle
- Under-Voltage Protection for PWM and Linear Output
- Over-Current Protection for PWM Output
- Sense Low-Side MOSFET’s RDS(ON)
- SOP-14, QSOP-16 and QFN4x4-16 packages
- Lead Free and Green Devices Available (Ro HS pliant)
Typical Application Circuit
General Description
The APW7067N integrates synchronous buck PWM and linear controller, as well as monitoring and protection functions into a single package. The synchronous PWM controller drives dual N-channel MOSFETs, which provides one controlled power output with under-voltage and overcurrent protections. Linear controller drives an external N-channel MOSFET with under-voltage protection.
The APW7067N provides excellent regulation for output load variation. An internal 0.8V temperature-pensated reference voltage is designed to meet the requirement of low output voltage applications. The switching frequency is adjustable from 150k Hz to 1000k Hz.
The APW7067N with excellent protection functions: POR, OCP and UVP. The Power-On-Reset (POR) circuit can monitor VCC12 supply voltage exceeds its threshold voltage while the controller is running, and a built-in digital soft-start provides both outputs with controlled rising voltage. The Over-Current Protection (OCP) monitors the output current by using the voltage drop across the lower MOSFET’s RDS(ON), paring with internal VOCP (0.25V), eliminating the need for a current sensing resister. When the output current reaches the trip point, the controller will shutdown the IC directly, and latch the converter’s output. The Under-Voltage Protection (UVP) monitors the voltages of...
