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Key Specifications
Part Number Description Status SubFamily Regulated Outputs(.) Output Options Iout (Max)(mA) Vin (Min)(V) Vin (Max)(V) Fixed Output Options(V) Vout (Min)(V) Vout (Max)(V) Enable Under Voltage Lockout Pin/Package EV Kit Available?
UM1451B-xx 300mA, Low Consumption, Wide Input Voltage Linear Regulator ACTIVE High Input Voltage LDO 1 Fixed Output 300 0 24 2.5 5 No No 3/SOT89
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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
 
Ordering Information
 

 
Marking Information

Part Number
Output Voltage
Packaging Type
Marking Code
Shipping Qty
UM1451B-25
2.5V
SOT89-3
1451B25
1000pcs/7Inch
Tape & Reel
UM1451B-26
2.6V
1451B26
UM1451B-27
2.7V
1451B27
UM1451B-28
2.8V
1451B28
UM1451B-29
2.9V
1451B29
UM1451B-30
3.0V
1451B30
UM1451B-31
3.1V
1451B31
UM1451B-32
3.2V
1451B32
UM1451B-33
3.3V
1451B33
UM1451B-34
3.4V
1451B34
UM1451B-35
3.5V
1451B35
UM1451B-36
3.6V
1451B36
UM1451B-37
3.7V
1451B37
UM1451B-38
3.8V
1451B38
UM1451B-39
3.9V
1451B39
UM1451B-40
4.0V
1451B40
UM1451B-41
4.1V
1451B41
UM1451B-42
4.2V
1451B42
UM1451B-43
4.3V
1451B43
UM1451B-44
4.4V
1451B44
UM1451B-45
4.5V
1451B45
UM1451B-46
4.6V
1451B46
UM1451B-47
4.7V
1451B47
UM1451B-48
4.8V
1451B48
UM1451B-49
4.9V
1451B49
UM1451B-50
5.0V
1451B50
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