DatasheetsPDF.com

AS1322

AMSCO
Part Number AS1322
Manufacturer AMSCO
Description DC-DC Step-Up Converters
Published Dec 8, 2006
Detailed Description www.DataSheet4U.com a u s t ri a m i c r o s y s t e m s AS1322 L o w Vo l ta g e , M i c r o p o w e r, D C - D C St e...
Datasheet PDF File AS1322 PDF File

AS1322
AS1322


Overview
www.
DataSheet4U.
com a u s t ri a m i c r o s y s t e m s AS1322 L o w Vo l ta g e , M i c r o p o w e r, D C - D C St e p - U p C o n v e r t e r s D a ta S he e t 1 General Description The AS1322A and the AS1322B are synchronous, fixed frequency, very high-efficiency DC-DC boost converters capable of supplying 3.
3V at 150mA from a single AAsupply.
Compact size and minimum external parts requirements make these devices perfect for modern portable devices.
High-speed switching frequency (1.
2MHz) and internally compensated PWM current mode design provide highlyreliable DC-DC conversion, especially when driving white LEDs.
The converters are available as the standard products listed in Table 1.
Table 1.
Standard Products Model AS1322A AS1322B Light Load Switching Automatic Powersave Operation Continuous Switching 2 Key Features ! ! ! ! ! ! ! ! ! ! ! ! ! 95% Efficiency Single-Cell Operation Delivers 150mA @ 3.
3V (from Single AA Cell) Delivers 500mA @ 3.
3V (from Two AA Cells) Low Start-Up Voltage: 0.
85V High-Speed Fixed-Frequency: 1.
2MHz Internal PMOS Synchronous Rectifier Automatic Powersave Operation (AS1322A) Continuous Switching at Light Loads (AS1322B) Anti-Ringing Control Minimizes EMI Logic Controlled Shutdown (< 1µA) Output Range: 2.
5 to 5.
0V 6-pin TSOT-23 Package The devices contain two internal MOSFET switches: one NMOS switch and one PMOS synchronous rectifier.
Anti-ringing control circuitry reduces EMI by damping the inductor in discontinuous mode, and the devices exhibit extremely low quiescent current (< 1µA) in shutdown.
The AS1322 is available in a 6-pin TSOT-23 package.
3 Applications The AS1322 is ideal for low-power applications where ultra-small size is critical as in medical diagnostic equipment, hand-held instruments, pagers, digital cameras, remote wireless transmitters, MP3 players, LCD bias supplies, cordless phones, GPS receivers, and PC cards.
Figure 1.
Typical Application Diagram – Single Cell to 3.
3V Synchronous Boost Converter L1 10µH...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)