LP3993 Datasheet | National Semiconductor

Description The LP3993 is a linear regulator capable of supplying 80m A output current. The LP3993 is designed to meet the requirements of digital systems where low IQ, fast start up, and good load transient response are important. The device has been designed to work with small ceramic capacitors of 1.0µF and above. This device is available with outputs in the range 1.5V to 3.3V outputs. Please contact your local sales office for availability of particular voltage options. Key Specifications n n n n n n n n n n n Input Voltage Range Output Voltage Range Output Current Output Stable - Capacitors Virtually Zero IQ (Disabled) Very Low IQ (Enabled) Output Voltage Noise PSRR Start Up Time Low Dropout (where applic.) Load Transient Response 2.5 to 6.0V 1.5 to 3.3V 80m A 1.0u F < 1µA 10µA at 1m A IOUT 250µVRMS 40d B at 1k Hz 150µs 160m V typ. 60m V Features n Stable with Low-Value Ceramic Input and Output Capacitors n No Noise Bypass Capacitor Required n Fast Turn-On n Logic Controlled Enable n Thermal-Overload and Short-Circuit Protection n -40 to +125˚C junction temperature range for operation Packages micro SMD (4 Pin) SOT23 - 5 For other package options contact your NSC sales office. Applications n Cellular Phones n PDA Handsets n Wireless LAN devices Typical Application Circuit © 2004 National Semiconductor Corporation DS200895 .national. Pin Descriptions Packages Pin No SOT23 1 2 micro SMD A2 B1 VIN GND Voltage Supply Input, A 1.0µF ceramic capacitor should be connected to this input pin. mon Ground Enable Input; An internal 400kΩ resistor connects this pin to ground Enables the Regulator when ≥ 1.2V. Disables the Regulator when ≤ 0.4V No Connection to this pin. Do not connect this pin to any other pin. Voltage output. Connect a 1.0µF low ESR capacitor to this Pin. Connect this output to the load circuit. Symbol Name and Function .. A1 4 5 B2 N/C VOUT Connection Diagrams Micro SMD, 4 Bump Package See NS package number TLA04...