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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AS1326 датащи(PDF) 1 Page - ams AG |
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AS1326 датащи(HTML) 1 Page - ams AG |
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1 / 18 page  AS1326 High Current, 0.8A DC-DC Step-Up Converters Dat a Sh eet www.austriamicrosystems.com Revision 1.02 1 - 18 1 General Description The AS1326A/AS1326B are high-efficiency, high cur- rent, DC-DC step-up converters specifically designed for battery-powered wireless applications. Low quiescent supply current (65µA), high operating frequency (1MHz), and minimal external component requirements make these devices perfect for small hand-held applications. Both devices use synchronous-rectified pulse-width modulation (PWM) boost technology to generate 2.5 to 5.0V outputs from a wide range of inputs, such as 1 to 3 alkaline/NiCd/NiMH cells or a single lithium-ion (Li+) cell. Automatic powersave operation significantly improves efficiency at light-loads. Continuous switching mode is available for applications requiring constant-frequency operation at all load cur- rents. PWM operation can also be synchronized to an external clock to protect sensitive frequency bands in communications equipment. Analog soft-start and adjustable current limit permit opti- mization of rush in current and external component size. The AS1326A/AS1326B are available in a 10-pin TDFN (3.0mm x 3.0mm) package. Figure 1. Block Diagram 2 Key Features ! Up to 800mA Output ! Constant-Frequency (1MHz) Operation ! Up to 96% Efficiency ! Input Range: 0.7 to 5.0V ! Fixed Output: 3.3V ! Adjustable Output: 2.5 to 5.0V ! PWM Synchronous-Rectified Technology ! Logic-Controlled Shutdown: 0.1µA ! Synchronizable Switching Frequency (0.5 to 1.2MHz) ! Adjustable Current Limit ! Adjustable Soft-Start ! 10-pin TDFN (3.0mm x 3.0mm) Package 3 Applications The devices are ideal for digital cordless phones. mobile phones, wireless handsets, hand-held instruments, PDAs, two-way pagers, and any battery-operated equip- ment. Table 1. Standard Products Model Input Signal Activation AS1326A Logic-Low On AS1326B Logic-High On AS1326 + – Reference Startup Osc Controller On Ref GND Rdy 1MHz Osc En CLK/SEL Mode Osc On Q D En Osc Mode FB ISET 2.15V IC Power Undervoltage Lockout 9 POUT 8 LX 7 PGND 2 REF 3 GND 6 CLK/SEL 4 FB 1 ISET 5 OUT 10 ON 10 ONN 1.25V AS1326A only AS1326B only |
Аналогичный номер детали - AS1326 |
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Аналогичное описание - AS1326 |
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