Datasheet
CMOS LDO Regulators for Portable Equipments
1ch 200mA
CMOS LDO Regulators
BUxxSA4 series
●General
Description
BUxxSA4 series are high-performance CMOS LDO
regulators with output current ability of up to 200-mA.
These devices have excellent noise and load response
characteristics despite of its low circuit current
consumption of 40µA. They are most appropriate for
various applications such as power supplies for logic IC,
RF, and camera modules.
●Features
High Output Voltage Accuracy:
±0.6%
(±15mV on VOUT<2.5V)
High Ripple Rejection: 70 dB (Typ, 1 kHz,)
Compatible with small ceramic capacitor
(Cin=Cout=0.47 µF)
Low Current Consumption: 40 µA
Output Voltage ON/OFF control
Built-in Over Current Protection Circuit (OCP)
Built-in Thermal Shutdown Circuit (TSD)
Adopting ultra-small WLCSP UCSP50L1
●Key
Specifications
Input Power Supply Voltage Range:
1.7V to 5.5V
Output Current Range:
0 to 200mA
Operating Temperature Range:
-40℃ to +85℃
Output Voltage Lineup:
1.8V,2.5V,2.55V
2.8V,3.0V,3.3V
Output Voltage Accuracy:
±0.6%
Circuit Current:
40µA(Typ.)
Standby Current:
0μA (Typ.)
●Package
W(Typ.) x D(Typ.) x H(Max.)
UCSP50L1(BUXXSA4WGWL)
0.8mm x 0.8mm x 0.5mm
●Applications
Portable devices
Camera modules
Other electronic devices using microcontrollers or
logic circuits
●Typical
Application Circuit
Vin
Cin
VIN
VOUT
Cout
BUxxSD2MG-M
BUxxSA4
Vout
On
Off
STBY
GND
Figure 1. Typical Application Circuit
○Product
structure：Silicon monolithic integrated circuit
.
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© 2012 ROHM Co., Ltd. All rights reserved.
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○This
product is not designed protection against radioactive rays
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BUxxSA4 series
●Pin
Configuration
Datasheet
1Pin Mark
1
2
A
B
Top View
(Mark Side)
B
A
1
2
Bottom View
●Pin
Description
Pin No.
A1
A2
B1
B2
Symbol
GND
STBY
VOUT
VIN
GND Pin
Output Control Pin
(High:ON, Low:OFF)
Output Pin
Input Pin
Function
●Block
Diagram
VIN
VIN
1
VREF
Cin
5
VOUT
GND
2
OCP
TSD
VOUT
Cout
4
N.C.
VSTBY
STBY
3
STBY
Cin(min)=0.47
µ
F (Ceramic)
Cout(min)=0.47
µ
F (Ceramic)
Figure 2. Block diagram
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BUxxSA4 series
●Absolute
Maximum Ratings
Parameter
Power Supply Voltage
Power Dissipation
Maximum Junction
Temperature
Operating Temperature Range
Storage Temperature Range
(*1)
Datasheet
Symbol
V
MAX
Pd
Tjmax
Topr
Tstg
Rating
-0.3 to +6.5
410
(*1)
+125
-40 to +85
-55 to +125
Unit
V
mW
℃
℃
℃
Derate by 4.1mW/℃ when operating above Ta=25℃.(When mounted on a board 63mm×55mm×1.6mm glass-epoxy board, 9 layer)
●Recommended
Operating Ratings
Parameter
Input Power Supply Voltage
Range
Symbol
VIN
Limit
1.7 to 5.5
Unit
V
●Recommended
Operating Conditions
Parameter
Input capacitor
Output capacitor
Symbol
Cin
Cout
Rating
Min.
0.47
(*2)
0.47
(*2)
Typ.
1.0
1.0
Max.
－
－
Unit
µF
µF
Conditions
A ceramic capacitor is recommended.
A ceramic capacitor is recommended.
(*2) Set the value of the capacitor so that it does not fall below the minimum value. Take into consideration the temperature characteristics,
DC device characteristics, and degradation with time.
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BUxxSA4 series
Datasheet
●Electrical
Characteristics
(*6)
(Unless otherwise noted, Ta=-25℃, V
IN
=V
OUT
+1.0V , V
STBY
=1.5V, Cin=1μF, Cout=1μF.)
Limit
PARAMETER
Symbol
Unit
Conditions
MIN.
TYP.
MAX.
VOUT
VOUT
IOUT = 10μA, VOUT≧2.5V
×0.994
×1.006
Output Voltage 1
VOUT1
VOUT
V
VOUT
VOUT
IOUT = 10μA, VOUT＜2.5V
-15mV
+15mV
IOUT=0 to 200mA, VOUT≧2.5V
VOUT
VOUT
VIN=VOUT+0.5 to 5.5V
×0.98
×1.02
Ta=-40 to +85℃
(*3,4,5)
Output Voltage 2
VOUT2
VOUT
V
IOUT=0 to 200mA, VOUT＜2.5V
VOUT
VOUT
VIN=3.0 to 5.5V
-50mV
+50mV
(*3,4,5)
Ta=-40 to +85℃
Circuit Current 1
IGND1
-
40
65
μA
IOUT=0mA
Circuit Current 2
IGND2
-
40
80
μA
Ta=-40 to +85℃
(*4)
, IOUT=0mA
Circuit Current (STBY)
ICCST
-
-
1.0
μA
STBY=0V
Ripple Rejection Ratio1
RR1
-
70
-
dB
VRR=-20dBv,fRR=1kHz,IOUT=10mA
Ripple Rejection Ratio2
RR2
-
55
-
dB
VRR=-20dBv,fRR=10kHz,IOUT=10mA
Ripple Rejection Ratio3
RR3
-
45
-
dB
VRR=-20dBv,fRR=100kHz,IOUT=10mA
VIN=0.98×VOUT, IOUT=100mA
-
80
150
mV
Ta=-40 to +85℃, VOUT≧2.5V
Dropout Voltage
VDROP
VIN=0.98×VOUT, IOUT=100mA
-
150
360
mV
Ta=-40 to +85℃, VOUT＜2.5V
Io=1 to 150mA,T
rise
=T
fall
=1μs,
Load transient resp.
VLOT
-
±65
-
mV
VIN=VOUT+1.0V
(*4)
VIN=VOUT+0.5 to VOUT+1.0V,
Line Transient resp.
VLIT
-
±5
-
mV
T
rise
=T
fall
=10μs
Output noise voltage
Startup time
Line Regulation
Load Regulation1
Load Regulation2
Maximum Output Current
Limit Current
Short Current
STBY Pin Current
ON
STBY Control
Voltage
OFF
VNOIS
TST
VDLI
VDLO1
VDLO2
IOMAX
ILMAX
ISHORT
ISTBY
VSTBH
VSTBL
-
-
-
-
-
200
250
-
-
1.1
-0.2
30
100
2
2
4
-
400
100
-
-
-
-
300
8
8
16
-
-
200
4.0
VIN
0.5
μVrms
μsec
mV
mV
mV
mA
mA
mA
μA
V
V
Bandwidth 10 to 100kHz
Output voltage settled
within tolerancies
IOUT=10mA VIN=VOUT+0.5 to 5.5V
(*5)
IOUT=1 to 100mA
IOUT=1 to 200mA
VIN=VOUT+1.0V
(*6)
Vo=VOUT×0.98
Vo=0V
Ta=-40 to +85℃
(*3) Operating conditions are limited by Pd.
(*4) Typical values apply for Ta=25℃.
(*5) VIN=3.0V to 5.0V for VOUT＜2.5V.
(*6) VIN=3.5V for VOUT＜2.5V.
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BUxxSA4 series
●Reference
data BU18SA4WGWL (Unless otherwise specified, Ta=25℃.)
Datasheet
1.90
1.80
1.60
T emp=25°C
VIN=ST BY
1.88
Temp=25°C
VIN=STBY
Output Voltage (V)
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
IOUT =0uA
IOUT =50mA
IOUT =200mA
Output Voltage (V)
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.72
1.70
0
0.5
1
1.5
2
2.5
3
3.5
IOUT =0uA
IOUT =50mA
IOUT =200mA
4
4.5
5
5.5
Input Voltage (V)
Input Voltage (V)
Figure 3. Output Voltage vs. Input Voltage
Figure 4. Line Regulation
100
1.90
1.88
VIN=2.8V
ST BY=1.5V
80
GND Current (uA)
VIN=ST BY
IOUT =0uA
1.86
Temp=-40°C
Temp=25°C
Temp=85°C
Output Voltage (V)
1.84
1.82
1.80
1.78
1.76
1.74
1.72
Temp=-40°C
Temp=85°C
Temp=25°C
60
40
20
0
0 0.5
1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
1.70
0
50
100
150
200
Output Current (mA)
Figure 5. GND Current vs. Input Voltage
Figure 6. Load Regulation
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TSZ02201-0RBR0A300100-1-2
2013.04.04 Rev.001
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