Datasheet
CMOS LDO Regulator Series for Portable Equipments
Versatile Package
FULL CMOS LDO Regulator
BUxxTD3WG series
●General
Description
BUxxTD3WG series is high-performance FULL CMOS
regulator with 200-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 35μA. 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 3.4V
±1.0% (±25mV)
35μA
-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=0.47uF)
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
Fig.1 Application Circuit
○Product
structure:Silicon monolithic integrated circuit
○This
product is not designed protection against radioactive rays.
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BUxxTD3WG series
●Connection
Diagram
VOUT
SSOP5
Datasheet
N.C.
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
Grouding
ON/OFF control of output voltage
(High: ON, Low: OFF)
Unconnected Terminal
Output Voltage
●Ordering
Information
B
Part
Number
U
x
x
T
D
3
W
G
-
½
Halogen Free
G : compatible
Blank : incompatible
T
R
Output Voltage
10 : 1.0V
34 : 3.4V
Series
Maximum Output Current
200mA
with
Package
output discharge G : SSOP5
Packageing and forming specification
Embossed tape and reel
TR : The pin number 1 is the upper right
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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BUxxTD3WG series
●Lineup
Marking
Output Voltage
Part Number
Datasheet
F0
1.0V
BU10
F6
2.0V
BU20
G5
3.1V
BU31
L6
1.1V
BU11
F7
2.1V
BU21
G6
3.2V
BU32
F1
1.2V
BU12
F8
2.5V
BU25
G7
3.3V
BU33
M0
1.25V
BU1C
F9
2.6V
BU26
G8
3.4V
BU34
L5
1.3V
BU13
G0
2.7V
BU27
F2
1.5V
BU15
G1
2.8V
BU28
F3
1.8V
BU18
G2
2.85V
BU2J
F4
1.85V
BU1J
G3
2.9V
BU29
F5
1.9V
BU19
G4
3.0V
BU30
●Absolute
Maximum Ratings (Ta=25°C)
PARAMETER
Symbol
VMAX
Pd
TjMAX
Topr
Tstg
Limit
-0.3
½
+6.5
540(*1)
+125
-40
½
+85
-55
½
+125
Unit
V
mW
℃
℃
℃
Power Supply Voltage
Power Dissipation
Maximum junction temperature
Operating Temperature Range
Storage Temperature Range
(*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
Symbol
VIN
IMAX
Limit
1.7½6.0
200
Unit
V
mA
●OPERATING
CONDITIONS
PARAMETER
Input Capacitor
Output Capacitor
Symbol
Cin
Co
MIN.
0.22(*2)
0.22(*2)
TYP.
0.47
0.47
MAX.
-
-
Unit
μF
μF
CONDITION
Ceramic capacitor 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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BUxxTD3WG series
●Electrical
Characteristics
(Ta=25℃, VIN=VOUT+1.0V (*3), STBY=VIN, Cin=0.47μF, Co=0.47μF, unless otherwise noted.)
Limit
MIN.
TYP.
MAX.
Datasheet
PARAMETER
Symbol
Unit
Conditions
Overall Device
VOUT×0.99
Output Voltage
Operating Current
Operating Current (STBY)
Ripple Rejection Ratio
VOUT
VOUT-25mV
VOUT
35
-
70
800
600
440
380
280
260
240
220
2
10
VOUT×1.01
V
VOUT+25mV
IOUT=10μA, VOUT≧2.5V
IOUT=10μA, VOUT＜2.5V
IOUT=0mA
STBY=0V
VRR=-20dBv, fRR=1kHz, IOUT=10mA
1.0V≦VOUT＜1.2V(IOUT=200mA)
1.2V≦VOUT＜1.5V(IOUT=200mA)
1.5V≦VOUT＜1.8V(IOUT=200mA)
1.8V≦VOUT＜2.5V(IOUT=200mA)
2.5V≦VOUT≦2.6V(IOUT=200mA)
2.7V≦VOUT≦2.85V(IOUT=200mA)
2.9V≦VOUT≦3.1V(IOUT=200mA)
3.2V≦VOUT≦3.4V(IOUT=200mA)
VIN=VOUT+1.0V to 5.5V (*4), IOUT=10μA
IOUT=0.01mA to 100mA
IIN
ISTBY
RR
-
-
45
-
-
-
-
60
1.0
-
1100
900
700
600
540
500
460
420
20
80
μA
μA
dB
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
Dropout Voltage
VSAT
-
-
-
-
Line Regulation
Load Regulation
VDL
VDLO
-
-
Over Current Protection (OCP)
Limit Current
Short Current
ILMAX
ISHORT
220
20
400
70
700
150
mA
mA
Vo=VOUT*0.95
Vo=0V
Standby Block
Discharge Resistor
STBY Pin Pull-down Current
STBY Control Voltage
ON
OFF
RDSC
ISTB
VSTBH
VSTBL
20
0.1
1.2
-0.3
50
0.6
-
-
80
2.0
6.0
0.3
Ω
μA
V
V
VIN=4.0V, STBY=0V, VOUT=4.0V
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
Cin½½½0.47μF (Ceramic)
Co
½½½0.47μF
(Ceramic)
Fig. 2 Block Diagrams
●Reference
data
BU18TD3WG
(Ta=25ºC unless otherwise specified.)
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Datasheet
2.0
1.8
1.85
100
Temp=25°C
1.84
Temp=25°C
VIN=STBY
Io=0uA
VIN=STBY
Output Voltage (V)
Output Voltage (V)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
1.82
1.81
1.80
1.79
1.78
1.77
1.76
1.75
1.7
1.8
1.9
2
2.1
2.2
2.3
2.4
2.5
Gnd Current (uA)
1.6
1.83
80
Temp=85°C
60
Io=0uA
Io=100uA
Io=50mA
Io=200mA
VIN=STBY
Temp=25°C
40
Io=0uA
Io=100uA
Io=50mA
Io=200mA
20
Temp=-40°C
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Input Voltage (V)
Input Voltage (V)
Fig 3. Output Voltage
Fig 4. Line Regulation
Fig 5. Circuit Current IGND
1.6
100
1.85
STBY Pin Current (uA)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
0
0
Output Voltage (V)
Gnd Current (uA)
80
VIN=2.8V
STBY=1.5V
1.84
Temp=85°C
VIN=2.8V
STBY=1.5V
Temp=25°C
Temp=85°C
1.83
1.82
1.81
1.80
1.79
1.78
1.77
1.76
1.75
Temp=85°C
60
40
Temp=-40°C
20
Temp=25°C
Temp=-40°C
Temp=25°C
Temp=-40°C
0.05
0.1
0.15
0.2
0
0.05
0.1
0.15
0.2
Input Voltage (V)
Output Current (A)
Output Current (A)
Fig 6. VSTBY - ISTBY
Fig 7. IOUT - IGND
Fig 8. Load Regulation
1.85
2.0
1.8
VIN=2.8V
2.0
1.84
Output Voltage (V)
Output Voltage (V)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.0
0.1
0.2
0.3
0.4
0.5
0.6
VIN=5.5V
VIN=2.3V
1.5
Output Voltage (V)
VIN=3.8V
Io=0mA
1.83
1.82
1.81
1.80
1.79
1.78
1.77
1.76
VIN=2.8V
STBY=1.5V
Io=0.1mA
1.0
Temp=25°C
0.5
Temp=25°C
STBY=1.5V
Temp=85°C
Temp=-40°C
0.0
0
0.5
1
1.5
1.75
-40
-15
10
35
60
85
Output Current (mA)
STBY Voltage (V)
Temp (°C)
Fig 9. OCP Threshold
Fig 10. STBY Threshold
Fig 11. VOUT - Temp
60
1.0
50
Gnd Current (uA)
Gnd Current (uA)
VIN=2.8V
STBY=1.5V
Io=0mA
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
VIN=2.8V
STBY=0V
40
30
20
10
0
-40
-15
10
35
60
85
0.0
-40
-15
10
35
60
85
Temp (°C)
Temp (°C)
Fig 12. IGND - Temp
Fig 13. IGND - Temp (STBY)
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