NCP1521B: Buck Converter, DC-DC, 1.5 MHz, 600 mA
The NCP1521B step-down PWM DC-DC converter is optimized for portable applications powered from one cell Li-ion or three cell Alkaline/NiCd/NiMH batteries. The part is available in adjustable output voltage versions ranging from 0.9 V to 3.3 V. It uses synchronous rectification to increase efficiency and reduce external part count. The device also has a built-in 1.5 MHz (nominal) oscillator which reduces component size by allowing smaller inductors and capacitors. Automatic switching PWM/PFM mode offers improved system efficiency. Additional features include integrated soft-start, cycle-by-cycle current limiting and thermal shutdown protection. The NCP1521B is available in space saving, low profile TSOP5 and UDFN6 packages.
特性- 96% efficiency, 30 uA quiescent current, 0.3 uA shutdown current
- 1.5 MHz switching frequency
- Auto-switching between PWM and PFM mode at light load conditions
- Adjustable output voltage from 0.9V to 3.3V
- Best in class Low Ripple even in PFM mode
| 优势- Extends battery life and 'play-time'
- Allows use of smaller inductor and capacitor
- Low power consumption at light loading
|
应用- Power supply for application processor
- Power supply for processor with low core voltage
| 终端产品- Cellular phones, smart phones, and PDAs
- MP3 players and portable audio systems
- Digital still cameras and video cameras
|
应用注释 (1)
封装图纸 (1)
| Document Title | Document ID/Size | Revision |
|---|
| TSOP-5 | 483 (32.5kB) | M |
仿真模型 (1)
数据表 (1)
评估板文档 (5)
评估板与开发工具
| 产品 | 状况 | Compliance | 简短说明 |
|---|
| NCP1521BEVB | Active | | Step Down Converter Evaluation Board |
产品订购型号
| 产品 | 状况 | Compliance | 封装 | MSL* | 容器 | 预算价格 (1千个数量的单价） |
|---|
| NCP1521BSNT1G | Active | Pb-free
Halide free | TSOP-5 / SOT-23-5 | 483 | 1 | Tape and Reel | 3000 | $0.21 |
订购产品技术参数
| Product | Topology | Control Mode | VCC Min (V) | VCC Max (V) | VO Typ (V) | IO Typ (A) | Efficiency (%) | fSW Typ (kHz) |
|---|
| NCP1521BSNT1G | Step-Down | Current Mode | 2.7 | 5.5 | 0.9 to 3.3 | 0.6 | 96 | 1500 |
