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UM1660S
具有400mA峰值电流限制的PFM模式升压型DC-DC转换器
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Key Specifications
Part Number Description Status Channels(.) Vin (Min)(V) Vin (Max)(V) Vout (Min)(V) Vout (Max)(V) Isw (Peak)(A) Switching Frequency(Max)(kHz) Type LED Current Per Channel(mA) LED(.) Topology Duty Cycle(Max)(%) Shutdown Current(Max)(μA) Peak Efficiency(%) Operating Temperature Range(°C) Pin/Package EV Kit Available?
UM1660S 具有400mA峰值电流限制的PFM模式升压型DC-DC转换器 ACTIVE 1 2 6 28 0.4 1000 Inductive 20 8 Boost 0 1 90 -40 to 85 5/SOT23 Y
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Product Description
 
The UM1660 is a PFM controlled step-up DC-DC converter with a switching frequency up to 1MHz. The device is ideal to generate output voltage for small to medium LCD bias supplies and white LED backlight supplies from a single cell Li-Ion battery. The part can also be used to generate standard 3.3V/5V to 12V power conversions.
With a high switching frequency of 1MHz, a low profile and small board area solution can be achieved using a chip coil and an ultra small ceramic output capacitor. The UM1660 has an internal 400mA switch current limit, offering lower output voltage ripple. The low quiescent current (typically 36µA) together with an optimized control scheme, allows device operation at very high efficiencies over the entire load current range.
 
Features
 
- 2.0V to 6.0V Input Voltage Range
- Adjustable Output Voltage up to 28V
- 400mA Internal Switch Current
- Up to 1MHz Switching Frequency
- 36µA Typical No Load Quiescent Current
- 1µA Maximum Shutdown Current
- Internal Soft-Start
- Available in Tiny SOT23-5 and DFN6L 2.0×2.0 Packages
 
Typical Application Circuit
 

 
Applications
 
- LCD Bias Supply
- White LED Supply for LCD Backlights
- Digital Still Camera
- PDAs, Organizers and Handheld PCs
- Cellular Phones
- Standard 3.3V/5V to 12V Conversion
 
Pin Configurations  


                          UM1660S 

Ordering Information

Part Number
Packaging Type
Marking Code
Shipping Qty
UM1660S
SOT23-5
PHO
3000pcs/7Inch
Tape & Reel

EV Board Users Guide

http://www.union-ic.com/upload/UserGuide/UM1660%20EV%20board%20Users%20Guide-01.pdf
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