Dual 800mA Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator
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概览
描述
The ISL8088 is a high-efficiency, dual synchronous step-down DC/DC regulator that can deliver up to 800mA continuous output current per channel. The supply voltage range of 2. 75V to 5. 5V allows the use of a single Li+ cell, three NiMH cells or a regulated 5V input. The current mode control architecture enables very low duty cycle operation at high frequency with fast transient response and excellent loop stability. The ISL8088 operates at a 2.25MHz switching frequency allowing the use of small, low cost inductors and capacitors. Each channel is optimized for generating an output voltage as low as 0. 6V. The ISL8088 has a user-configurable mode of operation-forced PWM mode and PFM/PWM mode. The forced PWM mode operation reduces noise and RF interference while the PFM mode operation provides high efficiency by reducing switching losses at light loads. In PFM mode of operation, both channels draw a total quiescent current of only 30µA hence enabling high light load efficiency in order to maximize battery life. The ISL8088 offers a 1ms Power-Good (PG) to monitor both output at power-up. When shutdown, ISL8088 discharges the outputs capacitor. Other features include internal digital soft-start, enable for power sequence, overcurrent protection, and thermal shutdown. The ISL8088 is offered in a 3mm x 3mm 10 Ld DFN package with a 1mm maximum height. The complete converter occupies less than 1. 8cm2 area.
特性
- Internal Current Mode Compensation
- 100% Maximum Duty Cycle for Lowest Dropout
- Selectable Forced PWM Mode and PFM Mode
- External Synchronization up to 4MHz
- Start-up with Pre-biased Output
- Soft-Stop Output Discharge During Disabled
- Internal Digital Soft-Start - 2ms
- Power-Good (PG) Output with 1ms Delay
应用
应用
- DC/DC POL Modules
- µC/µP, FPGA and DSP Power
- Plug-in DC/DC Modules for Routers and Switchers
- Test and Measurement Systems
- Li-ion Battery Power Devices
- Bar Code Readers
设计和开发
软件与工具
软件与工具
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开发板与套件
开发板与套件
Dual 800mA Low Quiescent Current 2.25MHz Efficient Synchronous Buck Regulator Evaluation Board
The ISL8088EVAL1Z evaluation board is intended for use by individuals with requirements for point-of-load (POL) applications sourcing from 2.75V to 5.5V. This...
特色文件:
Dual 800mA Low Quiescent Current 2.25MHz Efficient Synchronous Buck Regulator Evaluation Board
The ISL8088EVAL2Z evaluation board is intended for use by individuals with requirements for point-of-load (POL) applications sourcing from 2.75V to 5.5V. This...
特色文件:
模型
ECAD 模块
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
产品选择
Processing table
| DFN | Tube | 1000 | 获取样片, | |
| DFN | Reel | 6000 | ||
| DFN | Reel | 1000 |
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