Datasheet
CMOS LDO Regulator Series for Portable Equipments
Versatile Package
FULL CMOS LDO Regulator
BUxxUC3WG series
●General
Description
BUxxUC3WG series is high-performance FULL CMOS
regulator with 300-mA output, which is mounted on
versatile package SSOP5 (2.9 mm
2.8 mm
1.25 mm).
It has excellent noise characteristics and load
responsiveness characteristics despite its low circuit
current consumption of 50A. It is most appropriate for
various applications such as power supplies for logic IC,
RF, and camera modules ROHM’s.
●Key
Specifications
Output voltage:
Accuracy output voltage:
Low current consumption:
Operating temperature range:
1.0V to 3.3V
±1.0% (±25mV)
50μA
-40°C to +85°C
●Applications
Battery-powered portable equipment, etc.
●Package
SSOP5:
●Features
High accuracy detection
low current consumption
Compatible with small ceramic capacitor (Cin=Co=1.0uF)
With built-in output discharge circuit
High ripple rejection
ON/OFF control of output voltage
With built-in over current protection circuit
and thermal shutdown circuit
Package SSOP5 is similar to SOT-23-5 (JEDEC)
Low dropout voltage
2.90mm x 2.80mm x 1.25mm
●Typical
Application Circuit
STBY
VIN
STBY
VIN
VOUT
VOUT
GND
GND
GND
Figure 1. Application Circuit
○Product
structure：Silicon monolithic integrated circuit
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This
product is not designed for protection against radioactive rays
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TSZ02201-0RBR0A300110-1-2
29.Jan.2015 Rev.005
BUxxUC3WG series
●Connection
Diagram
SSOP5
VOUT
N.C.
Datasheet
Marking
VIN GND STBY
TOP VIEW
●Pin
Descriptions
SSOP5
PIN No.
1
2
3
4
5
Symbol
VIN
GND
STBY
N.C.
VOUT
Lot. No
Function
Power Supply Voltage
Grounding
ON/OFF control of output voltage
(High: ON, Low: OFF)
Unconnected Terminal
Output Voltage
●Ordering
Information
B
Part
Number
U
x
x
U
C
3
W
with switch
G
Package
G : SSOP5
-
½
½
Output Voltage
10 : 1.0V
33 : 3.3V
Low Dropout Voltage
Maximum Output Current
300mA
Packageing and forming specification
Embossed tape and reel
TR : The pin number 1 is the upper right
TL : The pin number 1 is the lower left
SSOP5
2.9±0.2
5
4
+
6
°
4
° −4°
+0.2
1.6
−0.1
2.8±0.2
1
2
3
+0.05
0.13
−0.03
1.25Max.
1.1±0.05
0.05±0.05
+0.05
0.42
−0.04
0.95
0.1
(Unit : mm)
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
0.2Min.
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TSZ02201-0RBR0A300110-1-2
29.Jan.2015 Rev.005
BUxxUC3WG series
●Lineup
Marking
Output
Voltage
Part
Number
Q0
1.0V
BU10
Q2
1.1V
BU11
Q8
1.8V
BU18
R6
2.5V
BU25
Y0
2.8V
BU28
Y6
3.2V
BU32
Y7
3.3V
BU33
Datasheet
●Absolute
Maximum Ratings (Ta=25°C)
PARAMETER
Power Supply Voltage
Power Dissipation
Maximum junction temperature
Operating Temperature Range
Storage Temperature Range
Symbol
VMAX
Pd
TjMAX
Topr
Tstg
Limit
-0.3
½
+125
-40
½
+85
-55
½
+125
+6.0
540(*1)
Unit
V
mW
℃
℃
℃
(*1)Pd deleted at 5.4mW/℃ at temperatures above Ta=25℃, mounted on 70×70×1.6 mm glass-epoxy PCB.
●RECOMMENDED
OPERATING RANGE (not to exceed Pd)
PARAMETER
Power Supply Voltage
Maximum Output Current
●OPERATING
CONDITIONS
PARAMETER
Input Capacitor
Output Capacitor
Symbol
Cin
Co
MIN.
0.47(*2)
0.47(*2)
TYP.
1.0
1.0
MAX.
-
-
Unit
μF
μF
CONDITION
Ceramic capacitor
recommended
Symbol
VIN
IMAX
Limit
1.7½5.5
300
Unit
V
mA
(*2)Make sure that the output capacitor value is not kept lower than this specified level across a variety of temperature and DC bias
characteristic.
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
3/23
TSZ02201-0RBR0A300110-1-2
29.Jan.2015 Rev.005
BUxxUC3WG series
●Electrical
Characteristics
(Ta=25℃, VIN=VOUT+1.0V (*3), STBY=VIN, Cin=1.0μF, Co=1.0μF, unless otherwise noted.)
PARAMETER
Overall Device
VOUT×0.99
Output Voltage
VOUT
VOUT-25mV
Operating Current
Operating Current (STBY)
Ripple Rejection Ratio
IIN
ISTBY
RR
-
-
45
-
-
Dropout Voltage
VSAT
-
-
-
-
Line Regulation
VDL
-
-
370
50
20
0.1
1.2
-0.3
Load Regulation
VDLO
Over-current Protection (OCP)
Limit Current
Short Current
Standby Block
Discharge Resistor
STBY Pin Pull-down Current
STBY Control Voltage
ON
OFF
RDSC
ISTB
VSTBH
VSTBL
50
0.9
-
-
80
8.0
5.5
0.3
Ω
μA
V
V
ILMAX
ISHORT
50
-
70
470
350
280
250
220
200
2
25
550
150
VOUT
VOUT+25mV
90
1.0
-
700
500
380
320
260
220
20
45
-
300
μA
μA
dB
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
VOUT×1.01
V
IOUT=10μA,VOUT＜2.5V
IOUT=0mA
IOUT=10μA,VOUT≧2.5V
Symbol
Limit
MIN.
TYP.
MAX.
Unit
Conditions
Datasheet
STBY=0V
VRR=-20dBv,fRR=1kHz,IOUT=10mA,
VIN=3.6V
1.0V≦VOUT＜1.2V(IOUT=300mA)
1.2V≦VOUT＜1.5V(IOUT=300mA)
1.5V≦VOUT＜1.7V(IOUT=300mA)
1.7V≦VOUT＜2.1V(IOUT=300mA)
2.1V≦VOUT＜2.5V(IOUT=300mA)
2.5V≦VOUT(IOUT=300mA)
VIN=VOUT+1.0V to 5.5V(*4), IOUT=10μA
IOUT=0.01mA to 300mA
Vo=VOUT*0.95
Vo=0V
VIN=5.5V, STBY=0V, VOUT=2.6V
STBY=1.5V
○This
product is not designed for protection against radioactive rays.
(*3) VIN=2.5V for VOUT≦1.5V
(*4) VIN=2.5V to 3.6V for VOUT≦1.5V
●Block
Diagrams
VIN
VIN
1
VREF
Cin
5
VOUT
GND
2
VOUT
OCP
TSD
Co
STBY
STBY
3
STBY
Discharge
Cin½½½1.0μF (Ceramic)
Co
½½½1.0μF
(Ceramic)
Figure 2. Block Diagrams
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
4/23
TSZ02201-0RBR0A300110-1-2
29.Jan.2015 Rev.005
BUxxUC3WG series
●
Reference data
Datasheet
(Ta=25ºC unless otherwise specified.)
BU10UC3WG
LINE REGULATION
1.10
1.08
1.06
1.04
LINE REGULATION
Vout=1.0V
Iout=10mA
1.10
1.08
1.06
1.04
Vout=1.0V
Iout=300mA
VOUT[V]
VOUT[V]
85℃
25℃
-40℃
1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2
1.02
1.00
0.98
0.96
0.94
0.92
0.90
1.02
1.00
0.98
0.96
0.94
0.92
0.90
85℃
25℃
-40℃
1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2
VIN[V]
VIN[V]
Figure 3.
Figure 4.
1.10
1.08
1.06
1.04
LOAD REGULATION
Vout=1.0V
1.10
OUTPUT VOLTAGE vs TEMPERATURE
Vout=1.0V
1.05
VOUT[V]
1.00
0.98
0.96
0.94
0.92
0.90
0
50
100
150
200
250
VOUT[V]
1.02
1.00
0.95
85℃
25℃
-40℃
300
10mA
150mA
300mA
0.90
-40
-20
0
IOUT[mA]
Temperature[℃]
20
40
60
80
Figure 5.
Figure 6.
70
65
60
55
50
45
GROUND PIN CURRENT vs INPUT VOLTAGE
Vout=1.0V
450
400
350
300
GROUND PIN CURRENT vs LOAD
Vout=1.0V
IGND[uA]
40
35
30
25
20
15
10
5
0
2.3
2.5
2.7
2.9
3.1
3.3
3.5
IGND[uA]
85℃
25℃
-40℃
250
200
150
100
50
0
0
50
100
150
200
250
85℃
25℃
-40℃
300
VIN[V]
IOUT[mA]
Figure 7.
Figure 8.
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/23
TSZ02201-0RBR0A300110-1-2
29.Jan.2015 Rev.005
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