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MAX1658ESA Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX1658ESA Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 12 page __________Applications Information Output Capacitor Selection and Stability To maintain stability, connect a ≥10µF capacitor with less than 200m Ω equivalent series resistance (ESR) from OUT to GND. Larger output capacitors improve load-transient response. Currents lower than 350mA make the use of smaller output capacitors possible. Table 1 shows the maximum output current typically achieved using various output capacitors. Output volt- ages higher than 3.3V require less output capacitance to remain stable. Table 1. Typical Load Current Capabilities Input Bypass Capacitor The use of a 0.1µF to 10µF input bypass capacitor is recommended. Larger capacitors provide better sup- ply-noise rejection and line-transient response, as well as improved performance when the supply has a high AC impedance. Polarized input bypass capacitors will be damaged under reverse battery conditions. If reverse input voltages are expected, use a non-polar- ized capacitor at the input. Noise and PSRR The MAX1658/MAX1659 exhibit 2.5mVp-p of noise dur- ing normal operation. This noise level is negligible in most applications. The MAX1658/MAX1659 are designed to maintain excellent power-supply rejection (55dB) at 50Hz/60Hz (or 50dB at 120Hz). These regulators are ideal for wall- cube applications that may contain significant ripple. Larger input and output capacitors will further improve the circuit’s AC response. See the Power-Supply Rejection Ratio vs. Frequency graphs in the Typical Operating Characteristics. 350mA, 16.5V Input, Low-Dropout Linear Regulators _______________________________________________________________________________________ 9 OUTPUT CAPACITOR 0mA to 120mA 2.2µF tantalum LOAD CURRENT RANGE 0mA to 250mA 4.7µF tantalum 0mA to 350mA 10µF tantalum ___________________Chip Information TRANSISTOR COUNT: 207 |
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