The UM1770 series are VLDO (very low dropout) linear regulators designed for low power portable applications. Typical output noise is only 90μVRMS (Fixed Output, VOUT=1.0V) and maximum dropout is just 320mV at the load current of 500mA.The internal P-channel MOSFET pass transistor requires no base current, allowing the device to draw only 250μA during normal operation at the maximum load current of 500mA.
Other features include high output voltage accuracy, excellent transient response, under voltage lockout, stability with ultra low ESR ceramic capacitors as small as 1μF, short-circuit and thermal overload protection and output current limiting.
The UM1770Y-xx series are available in SOT89-5 package, the UM1770DA-xx series are available in a low profile DFN6 2.0×2.0 package and the UM1770S-xx series are available in SOT23-5 package.

 

 
                        Figure 1. Adjustable Output Voltage Application Circuit
 

 

- Bluetooth/802.11 Cards

- PDAs and Notebook Computers

- Portable Instruments and Battery-Powered Systems

- Cellular Phones

 

                     (Top View)

                    UM1770S-00 

Part Number	Output Voltage	Packaging Type	Marking Code	Shipping Qty
UM1770S-00	ADJ	SOT23-5	5CT	3000pcs/7Inch Tape & Reel