方案
By Technology
Converters | MC33680
概览
The MC33680 is a dual DC-DC regulator designed for electronic organizer applications. Both regulators apply Pulse-Frequency-Modulation (PFM). The main step-up regulator output can be externally adjusted from 2.7V to 5V. An internal synchronous rectifier is used to ensure high efficiency (achieve 87%). The auxiliary regulator with a built-in power transistor can be configured to produce a wide range of positive voltage (can be used for LCD contrast voltage). This voltage can be adjusted from +5V to +25V by an external potentiometer.
The MC33680 has been designed for battery powered hand-held products. With the low start-up voltage from 1V and the low quiescent current (typical 35 µA); the MC33680 is best suited to operate from 1 to 2 AA/ AAA cell. Moreover, supervisory functions such as low battery detection, CPU Power-Good signal, and back-up battery control, for lithium battery or supercap are also included in the chip.
- Digital Organizer and Dictionary
- Dual Output Power Supply (For MPU, Logic, Memory, LCD)
- Handheld Battery Powered Device (1-2 AA/AAA cell)
- Low Input Voltage, 1V up
- Low Quiescent Current in Standby Mode: 35mA typical
- PFM and Synchronous Rectification to ensure high efficiency (87% @60mA Load)
- Adjustable Main Output: +2.7V to +5V nominal 3.3V @ 100mA max, with 1.8V input
- Auxiliary Output Voltage: +5V to +25V
+5V @ 25mA max, with 1.8V input
+25V @ 15mA max, with 1.8V input - Current Limit Protection
- Power-Good Signal with Programmable Delay
- Battery Low Detection
- Lithium Battery or Supercap Back-up
- 32-Pin LQFP Package
产品列表
如需购买产品或样品，请先登录您的安森美账号。
搜寻
Close Search
产品:
2
分享
排序方式
产品系列:
┗
可订购器件:
2
产品
MC33680FTB
More Details
MC33680FTBR2
More Details
Show More
1-25 of 25
Products per page
Jump to :
1
Support on the go
Find and compare products, get support and connect with onsemi sales team.
Contact Sales
