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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?
UM4750DB-xx 300mA, Micropower, Dual Channel Low Dropout Linear Regulator with Enable ACTIVE Dual Channel 300mA Output Current LDO 2 Fixed Output 300 2.5 5.5 1.2 5 Yes No 8/DFN 3.0×3.0
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Product Description
 
The UM4750 series are dual channel VLDO (very low dropout) linear regulators designed for low power portable applications. The range of output voltage is from 1.2V to 5.0V while operated from 2.5V to 5.5V input. Typical output noise is only 200μVRMS and maximum dropout is just 200mV at the load current of 100mA.
The UM4750 series offer high output voltage accuracy, excellent transient response, stability with ultra low ESR ceramic capacitors as small as 1μF, thermal overload protection and output current limiting.
The UM4750S-xx series are available in a low profile SOT23-6 package, the UM4750DA-xx series are available in a low profile DFN6 2.0×2.0 package, and UM4750DB-xx series are available in a low profile DFN8 3.0×3.0 package.
 
Features
 
- Very Low Dropout: 200mV (Max) at 100mA
- Maximum Input Voltage: 5.5V
- Low Noise: 200μVRMS (10Hz to 100kHz)
- Fast Transient Response
- Dual LDO Outputs (300mA/300mA)
- Output Current Limit
- Stable with 1μF Output Capacitor
- Thermal Overload Protection
- Low Profile SOT23-6, 6-Lead DFN 2.0×2.0 and 8-Lead DFN 3.0×3.0 Packages
 
Typical Application Circuit
 
 
Applications
 
- Bluetooth/802.11 Cards
- PDAs and Notebook Computers
- Portable Instruments and Battery-Powered Systems
- Cellular Phones
  
Pin Configurations 

                    (Top View)
  
               UM4750DB-xx
  
Naming Information
 

 
Available Voltage Version

Code
Voltage
Code
Voltage
Code
Voltage
Code
Voltage
A
5
F
4.2
L
3.3
R
1.8
B
4.8
G
4
M
3
S
1.5
C
4.7
H
3.8
N
2.8
T
1.3
D
4.5
J
3.6
P
2.7
U
1.2
E
4.3
K
3.5
Q
2.5
 
 
 
Ordering Information

Part Number
Packaging Type
Marking Code
Shipping Qty
UM4750DB-xx
DFN8 3.0×3.0
7XX
3000pcs/7Inch
Tape & Reel
 
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