UM3730
150mA, Micropower, Low Dropout Linear Regulator
UM3730DA-xx DFN4 1.0×
1.0
UM3730P-xx SOT353
General Description
The UM3730 series are low dropout linear regulators designed for low power portable applications.
Typical output noise is only 220μV
RMS
and typical dropout voltage is 155mV at the load current of
150mA. Ideal for battery powered applications, the UM3730 draws only 29μA current during no
load operation. The UM3730 includes an auto-discharge feature that is activated when the enable
pin is low.
Other features include 2% 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 UM3730 series are available in low profile DFN4 1.0× and SOT353 packages.
1.0
Applications
Digital Camera
PDAs and Notebook Computers
Portable Instruments and
Battery-Powered Systems
Cellular Phones
Features
Input voltage range: 2.5V to 5.5V
Guaranteed 150mA output current
± voltage accuracy at 150mA
2%
Low dropout voltage:
155mV(typical) at 150mA
Low quiescent current: 29μA(typical)
Low noise: 220μV
RMS
(10Hz to 100kHz)
Available fixed output voltage from 1.0V to
3.3V with 0.1V step
Output current limit
Thermal overload protection
Stable with 1μF output capacitor
Low profile DFN4 1.0× and SOT353
1.0
packages
Typical Application Circuit
UM3730
VIN
VIN
1uF
VOUT
1uF
VOUT
Chip Enable
EN
GND
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UM3730
Pin Configurations
Top View
VIN
4
EP
1
VOUT
EN
3
XX
2
GND
M: Month Code
UM3730DA-xx
DFN4 1.0×
1.0
5
4
XXX
1
2
GND
2
EN
3
4
NC
M: Month Code
UM3730P-xx
SOT353
Pin Description
Pin
Number
1
1
2
3
4
4
5
EP
Pin Name
DFN4 1.0×
1.0
VOUT
-
GND
EN
VIN
-
-
HS Pad
Pin Name
SOT353
-
IN
GND
EN
-
NC
OUT
-
Pin Function
Output Voltage
Supply Input
Ground
Enable Input: Active High. High=ON,
Low=Off
Supply Input
No connect.
Output Voltage
Exposed Heat Sink Pad
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M
3
IN
1
5
OUT
M
UM3730
Naming Information
UM3730
Output Voltage
10: 1.0V
11: 1.1V
12: 1.2V
……
33: 3.3V
Package Type
DA: DFN4 1.0×1.0
P: SOT353
Available Voltage Version
Part Number
UM3730DA-10
UM3730DA-11
UM3730DA-12
UM3730DA-13
UM3730DA-14
UM3730DA-15
UM3730DA-16
UM3730DA-17
UM3730DA-18
UM3730DA-19
UM3730DA-20
UM3730DA-21
UM3730DA-22
UM3730DA-23
UM3730DA-24
UM3730DA-25
UM3730DA-26
UM3730DA-27
UM3730DA-28
UM3730DA-29
UM3730DA-30
UM3730DA-31
UM3730DA-32
UM3730DA-33
Output Voltage
1.0V
1.1V
1.2V
1.3V
1.4V
1.5V
1.6V
1.7V
1.8V
1.9V
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
Packaging Type
Marking Code
JA
JB
J2
J3
J4
J5
J6
J7
J8
J9
JC
KB
K2
K3
K4
K5
K6
K7
K8
K9
KC
NB
N2
N3
Shipping Qty
DFN4 1.0×
1.0
3000pcs/7Inch
Tape & Reel
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UM3730
Available Voltage Version (Continued)
Part Number
UM3730P-10
UM3730P-11
UM3730P-12
UM3730P-13
UM3730P-14
UM3730P-15
UM3730P-16
UM3730P-17
UM3730P-18
UM3730P-19
UM3730P-20
UM3730P-21
UM3730P-22
UM3730P-23
UM3730P-24
UM3730P-25
UM3730P-26
UM3730P-27
UM3730P-28
UM3730P-29
UM3730P-30
UM3730P-31
UM3730P-32
UM3730P-33
Output Voltage
1.0V
1.1V
1.2V
1.3V
1.4V
1.5V
1.6V
1.7V
1.8V
1.9V
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
Packaging Type
Marking Code
UJA
UJB
UJ2
UJ3
UJ4
UJ5
UJ6
UJ7
UJ8
UJ9
UJC
UKB
UK2
UK3
UK4
UK5
UK6
UK7
UK8
UK9
UKC
UNB
UN2
UN3
Shipping Qty
SOT353
3000pcs/7Inch
Tape & Reel
Absolute Maximum Ratings (Note 1)
Symbol
V
IN
V
OUT
T
J
T
STG
T
L
θ
JA
(Notes 4)
Parameter
Supply Voltage on VIN Pin
Voltage on VOUT Pin
Operating Junction Temperature (Notes 2, 3)
Storage Temperature Range
Lead Temperature for Soldering 10 seconds
Package Thermal Resistance
DFN4 1.0×
1.0
SOT353
Value
-0.3 to +7.5
-0.3 to +7.5
-40 to +125
-55 to +150
+260
250
256
Unit
V
V
°
C
°
C
°
C
°
C/W
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
Note 2: The UM3730 is tested and specified under pulse load conditions such that T
J
≈T
A
. 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 over temperature protection that is intended to protect the device during
momentary overload conditions.
Note 4: The maximum allowable power dissipation of any T
A
(ambient temperature) is P
DMAX
= (T
JMAX
-
T
A
)/ θ
JA
. Exceeding the maximum allowable power dissipation will result in excessive die
temperature and the regulator will go into thermal shutdown.
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UM3730
Electrical Characteristics
V
IN
=V
EN
=V
OUT
+1V, C
IN
=C
OUT
=1μF, T
A
=25℃.
Symbol
V
IN
V
OUT
I
Q
I
EN
I
OUT
Parameter
Input Voltage
Range
Output Voltage
Range
Operating
Quiescent Current
Enable Input
Current
Output Current
Output Voltage
Accuracy
Test Conditions
Min
2.5
1.0
I
OUT
=0mA
V
EN
=V
IN
or GND
150
I
OUT
=150mA
I
OUT
=50mA,V
OUT
≥2.8V
I
OUT
=150mA,V
OUT
≥2.8V
I
OUT
=50mA,V
OUT
<2.8V
I
OUT
=150mA, V
OUT
<2.8V
V
OUT
=0V
I
OUT
=150mA, C
OUT
=1μF
V
IN
=2.5V to5.5V
V
IN
=2.5V to5.5V
1.2
100
160
20
V
OUT
+1V≤V
IN
≤5.5V
(V
IN
≥2.5V)
I
OUT
=10mA
V
IN
=V
OUT
+1V (V
IN
≥2.5V)
1mA≤IOUT≤150mA
V
OUT
=1.8V,
10Hz to 100kHz
C
IN
=1μF, I
OUT
=100mA
V
IN
=V
OUT
+1V
(V
IN
≥2.5V)
I
OUT
=100mA
F=1kHz
F=10kHz
0.1
0.8
220
45
dB
30
10
Ω
0.3
1.5
200
-2.0
55
155
60
180
325
30
0.4
+2.0
110
310
135
380
500
29
Typ
Max
5.5
3.3
39
1
Unit
V
V
μA
μA
mA
%
mV
mV
mV
mV
mA
μs
V
V
ppm/℃
℃
℃
%/V
%
μV
RMS
ΔV
DO
Dropout Voltage
I
LIMT
t
V
IL
V
IH
T
SHDN
ΔT
SHDN
LNR
LDR
Output Current
Limit
Startup Time
Response
Enable Input Low
Voltage
Enable Input High
Voltage
Output Voltage TC
Thermal-Shutdown
Temperature
Thermal-Shutdown
Hysteresis
Line Regulation
Load Regulation
Output Voltage
Noise
Power Supply
Ripple Rejection
Auto-Discharge
Resistance
PSRR
V
IN
=3.6V,
V
EN
=0V
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