lm2687-mwc National Semiconductor Corporation, lm2687-mwc Datasheet
lm2687-mwc
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lm2687-mwc Summary of contents
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... Voltage Inverter delivers a very low noise adjustable output for an input voltage in the range of +2.7V to +5.5V. Four low cost capacitors are used in this circuit to provide up to 10mA of output current. The regulated output for the LM2687 is adjustable between −1.5V and −5.2V. The LM2687 operates at 100 kHz (typical) switching frequency to reduce output resistance and voltage ripple. With an operating current of only 500 µ ...
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... LM2687MM LM2687MMX Ordering Information for LLP Package Device Order Number LM2687LD LM2687LDX Note: * The small physical sizes of the MSOP-8 and LLP-8 packages do not allow for the full part number marking. Devices will be marked with the designation shown in the column Package Marking. ...
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Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (V to GND or GND IN to OUT and V Continuous Output NEG OUT Current ...
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FIGURE 1. Standard Application Circuit for Minimum Capacitance Values FIGURE 2. Standard Application Circuit for Low Output Noise www.national.com 10118021 10118022 4 ...
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Typical Performance Characteristics Output Voltage vs. Output Current Figure 2 Output Voltage vs. Input Voltage Maximum V Current vs. Input Voltage NEG Unless otherwise specified, T Output Voltage vs. Output Current 10118004 Maximum Output Current vs. Input Voltage 10118006 No ...
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Typical Performance Characteristics V = −2.5V. (Continued) OUT Start-Up Time vs. Input Voltage Figure 1 Start-Up from Shutdown (no load) Figure 2 Output Ripple Figure 2 www.national.com Unless otherwise specified, T Switching Frequency vs. Input Voltage 10118010 10118012 Line Transient ...
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Typical Performance Characteristics V = −2.5V. (Continued) OUT Load Transient Response Output Noise Spectrum Figure 1 Unless otherwise specified, T 10118018 10118024 FIGURE 3. Functional Block Diagram 7 = 25˚ vs. Temperature FB 10118015 Output Noise Spectrum Figure ...
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... When shutdown is active V and V are switched to ground. OUT NEG Application Information SETTING THE OUTPUT VOLTAGE The output voltage on the LM2687 is set by using a resistor divider between the output, the feedback pin, and an arbi- trary voltage V (Figure 3). V ADJ ADJ any positive voltage ...
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Physical Dimensions inches (millimeters) unless otherwise noted For Ordering, Refer to Ordering Information Table MSOP-8 Package 8-Lead Mini SO-8 (MM) NS Package Number MUA08A 9 www.national.com ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...