CS8120

Features:

`5V ± 4% Output Voltage
`Low Dropout Voltage (1.2V @ 1A)
`Low Quiescent Current (4mA @ IOUT = 1A)
`µP Compatible Control
Functions
RESET
ENABLE
`Low Current Sleep Mode IQ = 250µA
`Fault Protection Thermal Shutdown Short Circuit 60V Peak Transient Voltage


Pinout




Specifications

DC Input Voltage ........................................................................................................-0.7 to 26V
Load Dump ............................................................................................................................60V
Output Current .................................................................................................Internally Limited
Electrostatic Discharge (Human Body Model)..........................................................................2kV
Operating Temperature .......................................................................................-40 to +125
Junction Temperature...........................................................................................-40 to +150
Storage Temperature ..........................................................................................-55 to +150
Lead Temperature Soldering Wave Solder (through hole styles only) ...10 sec. max, 260 peak
Reflow (SMD styles only) ...................................................60 sec. max above 183, 230 peak


Description

The CS8120 is a 5V, 1A precision linear regulator with two microprocessor compatible control functions and protection circuitry included on chip. The composite NPN-PNP output pass transistor assures a lower dropout voltage (1.2V @ 1A) without requiring excessive supply current (4mA).

The CS8120s two logic control functions make this regulator well suited to applications requiring microprocessorbased control at the board or module level.ENABLE controls the output stage. A high voltage (>2.9V) on the ENABLE lead turns off the regulator s pass transistor and sends the IC into Sleep mode where it draws only 250µA. RESET sends a RESET signal when the IC is powering up or whenever the output voltage falls out of regulation. The RESET signal is valid down to VOUT = 1V.

The CS8120 design optimizes supply rejection by switching the internal bandgap reference from the supply input to the regulator output as soon as the nominal output voltage is achieved. Additional on chip filtering enhances rejection of high frequency transients on all external leads.

The CS8120 is fault protected against short circuit, over voltage and thermal runaway conditions.