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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LP3954TL/NOPB.A датащи(PDF) 10 Page - Texas Instruments |
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LP3954TL/NOPB.A датащи(HTML) 10 Page - Texas Instruments |
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10 / 58 page  LP3954 SNVS340D – JUNE 2005 – REVISED MARCH 2013 www.ti.com MAGNETIC BOOST DC/DC CONVERTER ELECTRICAL CHARACTERISTICS Parameter Test Conditions Min Typ Max Unit ILOAD Load Current 3.0V ≤ VIN 0 300 VOUT = 5V mA 3.0V ≤ VIN 0 400 VOUT = 4V VOUT Output Voltage Accuracy 3.0V ≤ VIN ≤ VOUT - 0.5 −5 +5 % (FB Pin) VOUT = 5.0V Output Voltage 1 mA ≤ ILOAD ≤ 300 mA VIN–V(SCHOTT V (FB Pin) VIN > 5V + V(SCHOTTKY) KY) RDSON Switch ON Resistance VDD1,2 = 2.8V, ISW = 0.5A 0.4 0.8 Ω fPWF PWM Mode Switching Frequency RT = 82 k Ω 2 MHz freq_sel[2:0] = 1XX Frequency Accuracy 2.7 ≤ VDDA ≤ 2.9 −6 ±3 +6 % RT = 82 k Ω −9 +9 tPULSE Switch Pulse Minimum Width no load 25 ns tSTARTUP Startup Time Boost startup from STANDBY 10 ms ISW_MAX SW Pin Current Limit 700 800 900 mA 550 950 BOOST STANDBY MODE User can stop the Boost Converter operation by writing the Enables register bit EN_BOOST low. When EN_BOOST is written high, the converter starts for 10ms in PFM mode and then goes to PWM mode. BOOST OUTPUT VOLTAGE CONTROL User can control the boost output voltage by boost output 8-bit register. Boost Output [7:0] Boost Output Register 0DH Voltage (typical) Bin Hex 0000 0000 00 4.00 0000 0001 01 4.25 0000 0011 03 4.40 0000 0111 07 4.55 0000 1111 0F 4.70 0001 1111 1F 4.85 0011 1111 3F 5.00 Default 0111 1111 7F 5.15 1111 1111 FF 5.30 10 Submit Documentation Feedback Copyright © 2005–2013, Texas Instruments Incorporated Product Folder Links: LP3954 |
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