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Key Specifications
Product Description
The UM1451 series are a group of positive voltage output, high precision and low power consumption voltage regulators. The maximum input voltage is 24V. The output voltages are available in 100mV steps within a range of 2.5V to 5V. It can also be customized on request.
The UM1451 series have very low power consumption (IQ=3.5μA) which can greatly extend battery life.
The UM1451 series are available in low profile SOT23-3 & SOT89-3 packages.
Features
- Maximum Input Voltage: 24V
- Low Quiescent Current: 3.5μA (Typ.)
- Maximum Output Current: 300mA
- Low Dropout:
250mV@100mA (VOUT=3.3V)
500mV@200mA (VOUT=3.3V)
- Low Temperature Coefficient: ±150ppm/°C
- Output Current Limit:
400mA@ VOUT=3.3V
Typical Application Circuit
 Note 1: Input Capacitor (CIN=1μF) is recommended in all applications.
Note 2: Output Capacitor (COUT=4.7μF/6.8μF) is recommended in all applications to assure the stability of circuit. 1μF Tantalum capacitor or 6.8μF ceramic capacitor is recommended.
Applications
- Battery-Powered Equipment
- Power Management of MP3, PDA, DSC, Mouse, PS2 Games
- Reference Voltage Source
- Hand-Hold Equipment
Pin Configurations  UM1451B-xx
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 Marking Information
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Application Notes
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