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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 50μA. It is most appropriate for
various applications such as power supplies for logic IC,
RF, and camera modules ROHM’s.
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
Key Specifications
„ Output voltage:
„ Accuracy output voltage:
„ Low current consumption:
„ Operating temperature range:
1.0V to 4.0V
±1.0% (±25mV)
50μA
-40°C to +85°C
Applications
Battery-powered portable equipment, etc.
Package
SSOP5:
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 structureSilicon monolithic integrated circuit
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed for protection against radioactive rays
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TSZ02201-0RBR0A300110-1-2
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BUxxUC3WG series
Connection Diagram
SSOP5
VOUT
N.C.
Datasheet
Marking
Lot. No
VIN GND STBY
TOP VIEW
Pin Descriptions
PIN No.
1
2
3
4
5
Symbol
VIN
GND
STBY
N.C.
VOUT
SSOP5
Function
Power Supply Voltage
Grounding
ON/OFF control of output voltage
(High: ON, Low: OFF)
Unconnected Terminal
Output Voltage
Ordering Information
B U x x U C3 W G -
Part
Number
SSOP5
Output Voltage
10 : 1.0V
40 : 4.0V
Low Dropout Voltage
Maximum Output Current
300mA
with switch
Package
G : SSOP5
2.9±0.2
54
4°
+6°
4°
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
123
0.13
+0.05
0.03
+0.05
0.42 0.04
0.95
0.1
(Unit : mm)
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© 2013 ROHM Co., Ltd. All rights reserved.
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BUxxUC3WG series
Datasheet
Lineup
Marking
Output
Voltage
Part
Number
Q0
1.0V
BU10
Q7
1.5V
BU15
TBD(*)
1.55V
BU1F
Q1
1.05V
BU1A
Q2
1.1V
BU11
Q3
1.15V
BU1B
Q4
1.2V
BU12
TBD(*)
1.6V
BU16
TBD(*)
1.65V
BU1G
TBD(*)
1.7V
BU17
TBD(*)
1.75V
BU1H
Q5
1.25V
BU1C
Q8
1.8V
BU18
Q6
1.3V
BU13
TBD(*)
1.35V
BU1D
TBD(*)
1.4V
BU14
TBD(*)
1.45V
BU1E
Q9
1.85V
BU1J
R0
1.9V
BU19
TBD(*)
1.95V
BU1K
R1
2.0V
BU20
R2
2.05V
BU2A
R7
2.6V
BU26
R3
2.1V
BU21
TBD(*)
2.65V
BU2G
TBD(*)
2.15V
BU2B
R8
2.7V
BU27
R4
2.2V
BU22
R9
2.75V
BU2H
TBD(*)
2.25V
BU2C
Y0
2.8V
BU28
R5
2.3V
BU23
Y1
2.85V
BU2J
TBD(*)
2.35V
BU2D
Y2
2.9V
BU29
TBD(*)
2.4V
BU24
Y3
2.95V
BU2K
TBD(*)
2.45V
BU2E
Y4
3.0V
BU30
R6
2.5V
BU25
TBD(*)
3.05V
BU3A
TBD(*)
2.55V
BU2F
Y5
3.1V
BU31
TBD(*)
3.15V
BU3B
Y9
3.7V
BU37
Y6
3.2V
BU32
TBD(*)
3.75V
BU3H
TBD(*)
3.25V
BU3C
TBD(*)
3.8V
BU38
Y7
3.3V
BU33
TBD(*)
3.35V
BU3D
TBD(*)
3.85V
BU3J
TBD(*)
3.9V
BU39
Y8
3.4V
BU34
TBD(*)
3.95V
BU3K
TBD(*)
3.45V
BU3E
TBD(*)
3.5V
BU35
TBD(*)
3.55V
BU3F
TBD(*)
3.6V
BU36
TBD(*)
4.0V
BU40
(*)Under development
TBD(*)
3.65V
BU3G
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 +6.0
540(*1)
+125
-40 +85
-55 +125
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
Symbol
Limit
Power Supply Voltage
VIN 1.75.5
Maximum Output Current
IMAX
300
Unit
V
mA
OPERATING CONDITIONS
PARAMETER Symbol MIN.
TYP.
MAX.
Unit
CONDITION
Input Capacitor
Cin 0.47(*2)
Output Capacitor Co 0.47(*2)
1.0
1.0
- μF Ceramic capacitor
- μF recommended
(*2)Make sure that the output capacitor value is not kept lower than this specified level across a variety of temperature, DC bias, changing as
time progresses characteristic.
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BUxxUC3WG series
Datasheet
Electrical Characteristics
(Ta=25, VIN=VOUT+1.0V (*3), STBY=VIN, Cin=1.0μF, Co=1.0μF, unless otherwise noted.)
PARAMETER
Overall Device
Symbol
MIN.
Limit
TYP.
MAX.
Unit
Conditions
Output Voltage
VOUT
VOUT×0.99
VOUT×1.01
VOUT
VOUT-25mV
VOUT+25mV
V
IOUT=10μA,VOUT2.5V
IOUT=10μA,VOUT2.5V
Operating Current
Operating Current (STBY)
Ripple Rejection Ratio
IIN
ISTBY
RR
-
-
45
-
50 90 μA IOUT=0mA
- 1.0 μA STBY=0V
70
-
dB
VRR=-20dBv,fRR=1kHz,IOUT=10mA,
VIN=3.6V
470 700 mV 1.0VVOUT1.2V(IOUT=300mA)
- 350 500 mV 1.2VVOUT1.5V(IOUT=300mA)
Dropout Voltage
- 280 380 mV 1.5VVOUT1.7V(IOUT=300mA)
VSAT
- 250 320 mV 1.7VVOUT2.1V(IOUT=300mA)
- 220 260 mV 2.1VVOUT2.5V(IOUT=300mA)
- 200 220 mV 2.5VVOUT(IOUT=300mA)
Line Regulation
VDL -
2 20 mV VIN=VOUT+1.0V to 5.5V(*4), IOUT=10μA
Load Regulation
VDLO
Over-current Protection (OCP)
-
25 45 mV IOUT=0.01mA to 300mA
Limit Current
ILMAX
370
550
-
mA Vo=VOUT*0.95
Short Current
ISHORT
50
150 300
mA Vo=0V
Standby Block
Discharge Resistor
RDSC
20
50
80
Ω VIN=5.5V, STBY=0V, VOUT=2.6V
STBY Pin Pull-down Current ISTB 0.1 0.9 8.0 μA STBY=1.5V
STBY Control Voltage ON VSTBH
1.2
-
5.5
V
OFF VSTBL
-0.3
-
0.3
V
This product is not designed for protection against radioactive rays.
(*3) VIN=2.5V for VOUT1.5V
(*4) VIN=2.5V to 3.6V for VOUT1.5V
Block Diagrams
VIN VIN
1
Cin
GND 2
STBY
STBY
3
VREF
OCP
TSD
STBY
Discharge
Figure 2. Block Diagrams
VOUT VOUT
5
Co
Cin・・・1.0μF (Ceramic)
Co ・・・1.0μF (Ceramic)
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BUxxUC3WG series
Reference data BU10UC3WG (Ta=25ºC unless otherwise specified.)
Datasheet
LINE REGULATION
1.10 Vout=1.0V
1.08 Iout=10mA
1.06
1.04
1.02
1.00
0.98
0.96
0.94
85℃
0.92 25℃
0.90 -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]
Figure 3.
LINE REGULATION
1.10 Vout=1.0V
1.08 Iout=300mA
1.06
1.04
1.02
1.00
0.98
0.96
0.94
85℃
0.92 25℃
0.90 -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]
Figure 4.
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
0
LOAD REGULATION
Vout=1.0V
85℃
25℃
-40℃
50 100 150 200 250 300
IOUT[mA]
Figure 5.
1.10 OUTPUT VOLTAGE vs TEMPERATURE
Vout=1.0V
1.05
1.00
0.95
0.90
-40
-20
0 20 40
Temperature[℃]
Figure 6.
10mA
150mA
300mA
60 80
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
2.3
GROUND PIN CURRENT vs INPUT VOLTAGE
Vout=1.0V
85℃
25℃
-40℃
2.5 2.7 2.9 3.1 3.3 3.5
VIN[V]
Figure 7.
450
400
350
300
250
200
150
100
50
0
0
GROUND PIN CURRENT vs LOAD
Vout=1.0V
85℃
25℃
-40℃
50 100 150 200 250 300
IOUT[mA]
Figure 8.
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© 2013 ROHM Co., Ltd. All rights reserved.
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5/23
TSZ02201-0RBR0A300110-1-2
02.Jul.2013 Rev.002