Analog Devices / Maxim Integrated MAX77324 Synchronous Step-Down (Buck) Converter
Analog Devices Inc. MAX77324 Synchronous Step-Down (Buck) Converter delivers up to 1.5A of current with up to 93% efficiency and a 40µA quiescent current. ADI MAX77324 has a 6.89mm2 total solution size and is optimized for portable space-constrained battery-operated applications. The device operates over a 2.5V to 4.8V input voltage range to support Li+ battery-powered applications. The output voltage is adjustable from 0.6V to 2V, with a better than 2% accuracy over the whole temperature range.
ADI MAX77324 uses a constant-on-time PWM control scheme. A nominal 2MHz switching frequency reduces the solution footprint by using a small 0603 inductor. An automatic SKIP mode is also implemented to improve the light-load efficiency. The device provides low output voltage ripple, excellent line and load regulation, and transient response. A dedicated enable pin allows for simple hardware control.
Features
- 1.5A output current step-down converter
- 2.5V to 4.8V VIN range
- 0.6V to 2V adjustable VOUT range, ±2% accuracy
- 93% peak efficiency (3.8VIN, 1.8VOUT)
- SKIP mode for higher light-load efficiency
- 40μA quiescent current
- 1μA shutdown current
- 2MHz nominal switching frequency
- Enable pin for direct hardware control
- Cycle-by-cycle inductor current limit
- UVLO, soft-start, active output discharge, short-circuit, and thermal shutdown protections
- 1.22x0.85mm, 6-bump WLP
- 6.89mm2 total solution area
- Uses a small 0603 0.47μH inductor
Applications
- 1-cell battery-powered equipment
- Portable/wearables
- Internet of Things (IoT) devices
- Space constrained equipment
1-Cell to Core Voltage Buck Converter Application Circuit
Evaluation Kit
Analog Devices / Maxim Integrated MAX77324EVKIT Evaluation Kit
Design and evaluate high-efficiency synchronous stepdown DC-DC converters with integrated MOSFETs.
Publicado: 2018-06-25
| Actualizado: 2023-04-11