器件名称: AS1326B
功能描述: High Current, 0.8A DC-DC Step-Up Converters
文件大小: 1036.2KB 共18页
简 介:AS1326
H i g h C u r r e n t , 0 . 8 A 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 AS1326A/AS1326B are high-efficiency, high current, DC-DC step-up converters specifically designed for battery-powered wireless applications. Low quiescent supply current (65A), high operating frequency (1MHz), and minimal external component requirements make these devices perfect for small hand-held applications. Table 1. Standard Products Model AS1326A AS1326B Input Signal Activation Logic-Low On Logic-High On
2 Key Features
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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: 0.1A Synchronizable Switching Frequency (0.5 to 1.2MHz) Adjustable Current Limit Adjustable Soft-Start 10-pin TDFN (3.0mm x 3.0mm) Package
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 currents. PWM operation can also be synchronized to an external clock to protect sensitive frequency bands in communications equipment. Analog soft-start and ad……
