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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?
UM1451S-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/SOT23
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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  

                
                                    UM1451S-xx
 
Ordering Information
 

 
Marking Information

Part Number
Output Voltage
Packaging Type
Marking Code
Shipping Qty
UM1451S-25
2.5V
SOT23-3
5M2
3000pcs/7Inch
Tape & Reel
UM1451S-26
2.6V
5MB
UM1451S-27
2.7V
5MC
UM1451S-28
2.8V
5MD
UM1451S-29
2.9V
5ME
UM1451S-30
3.0V
5MF
UM1451S-31
3.1V
5MH
UM1451S-32
3.2V
5ML
UM1451S-33
3.3V
5MM
UM1451S-34
3.4V
5MJ
UM1451S-35
3.5V
5MK
UM1451S-36
3.6V
5MN
UM1451S-37
3.7V
5MP
UM1451S-38
3.8V
5MQ
UM1451S-39
3.9V
5MR
UM1451S-40
4.0V
5MS
UM1451S-41
4.1V
5MT
UM1451S-42
4.2V
5MY
UM1451S-43
4.3V
5MU
UM1451S-44
4.4V
5MZ
UM1451S-45
4.5V
5U5
UM1451S-46
4.6V
5U6
UM1451S-47
4.7V
5U7
UM1451S-48
4.8V
5U8
UM1451S-49
4.9V
5U9
UM1451S-50
5.0V
5UA
 
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