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具有轻载模式的4.5V至18V 输入4A 同步降压转换器TPS54426
描述 : |
IC BUCK SYNC ADJ 4A 14HTSSOP |
系列 : | Swift™, D-Cap2™, Eco-Mode™ |
类型 : |
降压(降压) |
输出类型 : |
可调式 |
输出数 : |
1 |
输出电压 : |
0.76 V ~ 5.5 V |
输入电压 : |
4.5 V ~ 18 V |
PWM 型 : |
混合物 |
频率 - 开关 : |
700kHz |
电流 - 输出 : |
4A |
同步整流器 : |
是 |
工作温度 : |
-40°C ~ 85°C |
安装类型 : |
表面贴装 |
封装/外壳 : |
14-TSSOP (0.173", 4.40mm 宽) 裸露焊盘 |
包装 : |
带卷 (TR) |
供应商设备封装 : |
14-HTSSOP |
说明:
The TPS54426 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54426 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54426 uses the D-CAP2™ mode control which provides a very fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads. Eco-mode™ allows the TPS54426 to maintain high efficiency during lighter load conditions. The TPS54426 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP, SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable soft start time and a power good function. The TPS54426 is available in the 14-pin HTSSOP package and the 16 pin QFN package, designed to operate from –40°C to 85°C.
特性:
- D-CAP2™ Mode Enables Fast Transient Response
- Low Output Ripple and Allows Ceramic Output Capacitor
- Wide VIN Input Voltage Range: 4.5 V to 18 V
- Output Voltage Range: 0.76 V to 5.5 V
-
Highly Efficient Integrated FET’s Optimized
for Lower Duty Cycle Applications
– 65 mΩ (High Side) and 55 mΩ (Low Side) - High Efficiency, less than 10 µA at shutdown
- High Initial Bandgap Reference Accuracy
- Adjustable Soft Start
- Pre-Biased Soft Start
- 700-kHz Switching Frequency (fSW)
- Cycle By Cycle Over Current Limit
- Power Good Output
- Auto-Skip Eco-mode for High Efficiency at Light Load
-
APPLICATIONS
-
Wide Range of Applications for Low Voltage System
- Digital TV Power Supply
- High Definition Blu-ray Disc Players
- Networking Home Terminal
- Digital Set Top Box (STB)
-
Wide Range of Applications for Low Voltage System
框图: