Datasheet MAX1735 (Maxim) - 9

200mA, Negative-Output, Low-Dropout Linear Regulator in SOT23 MAX1735 Noise, PSRR, and Transient Response Dropout Voltage
MAX1735 output noise is typically 160µVRMS. This is A regulator’s minimum input-to-output voltage differen- suitably low for most applications. See the Output tial dropout voltage determines the lowest usable sup- Noise vs. Frequency plot in the Typical Operating ply voltage for an application. In battery-powered Characteristics. systems, this determines the useful end-of-life battery The MAX1735 is optimized for battery-powered equip- voltage. Since the MAX1735’s pass element is an ment, with low dropout voltage and low quiescent cur- N-channel MOSFET, dropout voltage is the product of rent. It maintains good transient response, AC rejection, RDS(ON) and the load current; see Electrical and noise characteristics even near dropout. See Characteristics and Dropout Voltage vs. Load Current Power-Supply Rejection Ratio vs. Frequency in the in the Typical Operating Characteristics for details. The Typical Operating Characteristics. When operating MAX1735 operating (ground pin) current typically from very noisy sources, supply noise rejection and remains below 125µA at full load in dropout. transient response can be improved by increasing the
___________________Chip Information
input and output capacitance, and by employing pas- sive postfiltering. TRANSISTOR COUNT: 293
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