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LM3253 数据表(PDF) 3 Page - Texas Instruments |
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LM3253 数据表(HTML) 3 Page - Texas Instruments |
3 / 25 page LM3253 www.ti.com SNVS791Q – FEBRUARY 2012 – REVISED MAY 2013 Pin Descriptions Pin # Name Description A1 PGND Power Ground to the internal NFET switch. B1 C1 SGND Signal Analog and Control Ground (Low Current). D1 VDD Analog Supply Input. A2 Switching Node connection to the internal PFET switch and NFET synchronous rectifier. Connect SW to an inductor with a saturation current rating that exceeds the ILIM,PFET,Steady State Current Limit B2 specification of the LM3253. Enable Input. Set this digital input HIGH for normal operation. For shutdown, set low. Pin has an C2 EN 800 k Ω internal pulldown resistor. D2 VCON Voltage Control Analog input. VOUT = 2.5 x VCON. A3 PVIN Power Supply Voltage Input to the internal PFET switch and ACB. B3 Bypass Mode Input. Set the pin HIGH for forced Bypass mode operation. Set the pin LOW for C3 BP automatic Analog Bypass Mode (recommended). PWM/PFM Mode Selection Input. Setting the pin HIGH allows for PFM or PWM, depending on D3 MODE the load current. Setting the pin LOW forces the part to be in PWM only. A4 ACB Analog Current Bypass. Connect to the output at the output filter capacitor. B4 C4 BGND Active Current assist and analog Bypass Ground (High Current). D4 FB Feedback Analog Input. Connect to the output at the output filter capacitor. Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM3253 |
类似零件编号 - LM3253_15 |
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类似说明 - LM3253_15 |
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