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  Seaward Introduces Dual Channel LDO for Portable Applications Publication:2006-5-30 

Media Contact:
Jane Wang
Seaward Electronics INC.
010-8289-5700x 8808
jane@seawardinc.com.cn

Seaward Introduces Dual Channel LDO for Portable Applications

May 30th , 2006 - Seaward today introduced the SE5221, a dual channel LDO for Portable Applications where space is limited and low-cost solution is much preferred. The examples include Cellphones, MPEG4’s, Bluetooth earpieces, Digital Still Cameras, and WLAN’s.

Many portable applications requiretwo difference voltages, one for the Core voltage supply, which is often around 1.5V or 1.8V, and another for peripherals interface, which is often around 2.8V or 3.3V. In most PCB layouts, these two difference voltages are close to each other. In these applications, SE5221 offers a perfect solution. SE5221 is a dual-channel low dropout regulator that is able to supply up to 200mA at each channel. SE5221 is designed to have a special internal Bandgap reference that offers very low PSRR at better than 60dB so the external bypass is not required. The ground current is minimized to extend the battery life in most portable applications. SE5221 consumes typically 36uA at light loads when both LDO’s are simultaneous turned on. Each channel can be shutdown individually to further prolong battery life.  Other features include Over-Current Protection and Over-Temperature Protection.

 

SE5221 is available in low profile SOT23-6 package.

Key Features for SE5221

·         Typical 330mV Dropout Voltage at 200mA

·         Up to 200mA Output Current (Each Channel)

·         Low Ground Current at 36uA (Typ.)

·         Dual Shutdown Pins to Control Each Output

·         Current Limiting and Thermal Protection

·         Two LDOs in SOT-23-6L Package

Packaging, Pricing and Availability
Seaward’s SE5221 is available now in an 6-lead SOT23 and costs 2.0 RMB in 1,000-unit quantities. 

About Seaward Electronics INC
Seaward Electronics INC, a young and energetic startup specialized in Analog and mixed signal IC’s, designs Power Management devices for a variety of applications. Seaward’s leading-edge products are used in wireless handsets and LANs, Digital cameras, cellphones, chargers, PCs and laptops, MPEG4s, MP3s, portable DVDs, and Flash storage devices. Seaward designs its products at both Silicon Valley in the United States and Beijing in China. Seaward has sales’ offices at Taipei(Taiwan), Beijing(China), Shen Zhen(China), Shanghai(China), and Milpitas (USA).