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Key Specifications
Product Description
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. Features
- Very Low Dropout: 320mV (Max) at 500mA
- Maximum Input Voltage: 6.0V
- Low Noise (10Hz to 100kHz):
90μVRMS (Fixed Output, VOUT=1.0V);
60μVRMS (Adjustable Output, VOUT=1.0V);
194μVRMS (Adjustable Output, VOUT=3.3V);
305μVRMS (Adjustable Output, VOUT=5.0V)
- ±2% Voltage Accuracy at 500mA
- Fast Transient Response
- Under Voltage Lockout
- Fixed Output Voltage of UM1770Y/DA/S-xx:
1.0V to 4.0V with 0.1V Interval
- Adjustable Output Voltage of UM1770Y/DA/S-00:
1.0V to 5.0V
- Output Current Limit
- Stable with 1μF Output Capacitor
- Short-Circuit and Thermal Overload Protection
- Low Profile SOT89-5, DFN6 2.0×2.0, SOT23-5 Packages
Typical Application Circuit
.jpg) Figure 1. Fixed Output Voltage Application Circuit
Applications - Bluetooth/802.11 Cards
- PDAs and Notebook Computers
- Portable Instruments and Battery-Powered Systems
- Cellular Phones
Pin Configurations
(Top View)
 UM1770S-xx Naming Information
 Ordering Information
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Application Notes
Product Selection Guide
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