General Description：
The EMP893X series is a family of CMOS linear regulators. It is consisted of EMP8935, EMP8936 and EMP8938, featuring ultra-high power supply rejection ratio, low output voltage noise, low dropout voltage, low quiescent current and fast transient response. It guarantees delivery of 300mA output current, and supports preset (1.2V, 1.5V, 1.8V, 2.5V, 2.8V, 2.85V, 3.0V, 3.3V) as well as adjustable (1.2V to 5.0V) output voltage versions.
Based on its low quiescent current consumption and its less than 1μA shutdown mode of logical operation, the EMP893X is ideal for battery-powered applications. It provides fast turn-on and start-up time by using dedicated circuitry to pre-charge an optional external bypass capacitor. This bypass capacitor is used to reduce the output voltage noise without adversely affecting the load transient response. The high power supply rejection ratio of the EMP893X holds well for low input voltages typically encountered in battery- operated systems. The regulator is stable with small ceramic capacitive loads (2.2μF typical).
Additional features include regulation fault detection, bandgap voltage reference, constant current limiting and thermal overload protection. Available in miniature 8-pin MSOP and 6-pin DFN (2x2) packages, the EMP893X is pin and package compatible with the MAX8860 and the LP3982. A 5-pin SOT-25 package option is also offered to provide additional flexibility for different applications.
EMP products are Pb-free and RoHS compliant.
Features：
MAX8860/LP3982 pin, package and spec. compatible
Miniature SOT-25, SOT-26, MSOP-8 and DFN-6 (2x2) packages
300mA guaranteed output current
75dB typical PSRR at 1kHz (60dB typical at 10KHz)
30μV RMS output voltage noise (10Hz to 100kHz)
110mV typical dropout at 300mA for MSOP-8
106μA typical quiescent current
less than 1μA typical shutdown mode
Fast line and load transient response
80μs typical fast turn-on time
2.5V to 5.5V input range
Stable with small ceramic output capacitors
Over temperature and over current protection
±2% output voltage tolerance
Applications：
Wireless handsets
PCMCIA cards
DSP core power
Hand-held instruments
Battery-powered systems
Portable information appliances
Elite MicroPower Inc. reserves the right to make changes to improve reliability or manufacturability without notice, and customers are advised to obtain the latest version of relevant information prior to placing orders.
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