UM375xx
300mA, Micropower, VLDO Linear Regulator
UM375xxS
SOT23-5
UM375xxP
SOT353
General Description
The UM375xx series are VLDO (very low dropout) linear regulators designed for low power
portable applications. Typical output noise is only 170μV
RMS
(UM37512) and maximum dropout is
just 200mV at the load current of 100mA.The internal P-channel MOSFET pass transistor requires
no base current, allowing the device to draw only 90μA during normal operation at the maximum
load current of 300mA.
Other features include high output voltage accuracy, under voltage lockout, stability with ultra low
ESR ceramic capacitors as small as 1μF, thermal overload protection and output current limiting.
The UM375xx series are available in a low profile SOT23-5 and SOT353 package.
Applications
Bluetooth/802.11 Cards
PDAs and Notebook Computers
Portable Instruments and
Battery-Powered Systems
Cellular Phones
Features
Input Voltage Range: 2.0V to 6.0V
Very Low Dropout: 200mV(max) at 100mA
Low Noise:170μV
RMS
(UM37512，10Hz to
100kHz)
±2% Voltage Accuracy at 150mA
Fixed Output Voltage:
1.2V to 5.0V with 100mV interval
Output Current Limit
Stable with 1μF Output Capacitor
Thermal Overload Protection
Low Profile SOT23-5 and SOT353 Package
Pin Configurations
Top View
5XX
UM375xxS
M: Month Code
SOT23-5
________________________________________________________________________
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1/12
UM375xx
VXX
UM375xxP
M: Month Code
SOT353
Pin Description
Pin
Number
1
2
3
4
5
Symbol
IN
GND
SHDN
NC
OUT
____________
Function
Power Supply
Ground
Shutdown Input, Active Low
Not Connected
Voltage Regulated Output
________________________________________________________________________
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UM375xx
Ordering Information
Part Number
UM37550S
UM37549S
UM37548S
UM37547S
UM37546S
UM37545S
UM37544S
UM37543S
UM37542S
UM37541S
UM37540S
UM37539S
UM37538S
UM37537S
UM37536S
UM37535S
UM37534S
UM37533S
UM37532S
UM37531S
UM37530S
UM37529S
UM37528S
UM37527S
UM37526S
UM37525S
UM37524S
UM37523S
UM37522S
UM37521S
UM37520S
UM37519S
UM37518S
UM.37517S
UM37516S
UM37515S
UM37514S
UM37513S
UM37512S
Output Voltage
5.0V
4.9V
4.8V
4.7V
4.6V
4.5V
4.4V
4.3V
4.2V
4.1V
4.0V
3.9V
3.8V
3.7V
3.6V
3.5V
3.4V
3.3V
3.2V
3.1V
3.0V
2.9V
2.8V
2.7V
2.6V
2.5V
2.4V
2.3V
2.2V
2.1V
2.0V
1.9V
1.8V
1.7V
1.6V
1.5V
1.4V
1.3V
1.2V
Packaging Type
Marking Code
5DS
5D9
5DR
5DQ
5DZ
5DP
5DV
5DN
5DJ
5DY
5DM
5DT
5DL
5DA
5DH
5DF
5DB
5DE
5DD
5EA
5ER
5EB
5EQ
5EP
5EZ
5EN
5EU
5EY
5ET
5ES
5EC
5EF
5EK
5EM
5EL
5EJ
5EH
5EE
5ED
Shipping Qty
SOT23-5
3000pcs/7Inch
Tape & Reel
________________________________________________________________________
http://www.union-ic.com Rev.05 Nov.2013
3/12
UM375xx
Ordering Information
Part Number
UM37550P
UM37549P
UM37548P
UM37547P
UM37546P
UM37545P
UM37544P
UM37543P
UM37542P
UM37541P
UM37540P
UM37539P
UM37538P
UM37537P
UM37536P
UM37535P
UM37534P
UM37533P
UM37532P
UM37531P
UM37530P
UM37529P
UM37528P
UM37527P
UM37526P
UM37525P
UM37524P
UM37523P
UM37522P
UM37521P
UM37520P
UM37519P
UM37518P
UM37517P
UM37516P
UM37515P
UM37514P
UM37513P
UM37512P
Output Voltage
5.0V
4.9V
4.8V
4.7V
4.6V
4.5V
4.4V
4.3V
4.2V
4.1V
4.0V
3.9V
3.8V
3.7V
3.6V
3.5V
3.4V
3.3V
3.2V
3.1V
3.0V
2.9V
2.8V
2.7V
2.6V
2.5V
2.4V
2.3V
2.2V
2.1V
2.0V
1.9V
1.8V
1.7V
1.6V
1.5V
1.4V
1.3V
1.2V
Packaging Type
Marking Code
VTA
VT9
VT8
VT7
VT6
VT5
VT4
VT3
VT2
VT1
VJA
VJ9
VJ8
VJ7
VJ6
VJ5
VJ4
VJ3
VJ2
VJ1
VMA
VM9
VM8
VM7
VM6
VM5
VM4
VM3
VM2
VM1
VLA
VL9
VL8
VL7
VL6
VL5
VL4
VL3
VL2
Shipping Qty
SOT353
3000pcs/7Inch
Tape & Reel
________________________________________________________________________
http://www.union-ic.com Rev.05 Nov.2013
4/12
UM375xx
Absolute Maximum Ratings (Note 1)
Symbol
V
IN
V
OUT
T
J
T
STG
Parameter
Supply Voltage on IN Pin
Voltage on OUT Pin
Operating Junction Temperature (Notes 2, 3)
Storage Temperature Range
Value
-0.3 to +7.5
-0.3 to +7.5
-40 to +125
-65 to +150
Unit
V
V
°C
°C
T
L
Lead Temperature for Soldering 10 seconds
+300
°C
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be
impaired.
Note 2: The UM375xx is tested and specified under pulse load conditions such that T
J
≈T
A
. The
device is guaranteed to meet performance specifications from 0
℃
to 70℃. Specifications
over the – 40
℃
to 125
℃
operating junction temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 3: This IC includes overtemperature protection that is intended to protect the device during
momentary overload conditions. Junction temperature will exceed 125℃ when
overtemperature protection is active. Continuous operation above the specified maximum
operating junction temperature may impair device reliability.
________________________________________________________________________
http://www.union-ic.com Rev.05 Nov.2013
5/12
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