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PDF BU18SD5 Data sheet ( Hoja de datos )
| Número de pieza | BU18SD5 | |
| Descripción | CMOS LDO Regulators | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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CMOS LDO Regulators for Portable Equipments
1ch 500mA
CMOS LDO Regulators
BUxxSD5 series
●General Description
BUxxSD5 series are high-performance CMOS LDO
regulators with output current ability of up to 500mA.
These devices have excellent noise and load response
characteristics despite of its low circuit current
consumption of 33µA. They are most appropriate for
various applications such as power supplies for logic IC,
RF, and camera modules.
●Features
High Output Voltage Accuracy: 2.0%
(In all recommended conditions)
High Ripple Rejection: TYP;68dB(f=1KHz)
Compatible with small ceramic capacitor
(Cin=Cout=0.47 µF, min)
Low Current Consumption: 33 µA
Output Voltage ON/OFF control
Built-in Over Current Protection Circuit (OCP)
Built-in Thermal Shutdown Circuit (TSD)
Package SSOP5 is similar to SOT23-5(JEDEC)
●Key Specifications
Input Power Supply Voltage Range: 1.7V to 6.0V
Output Current Range:
0 to 500mA
Operating Temperature Range: -40℃ to +105℃
Output Voltage Lineup:
1.8V, 3.3V
Output Voltage Accuracy:
±2.0%
Circuit Current:
33µA(Typ.)
Standby Current:
0μA (Typ.)
●Package
SSOP5
W(Typ) x D(Typ) x H(Max)
2.90mm x 2.80mm x 1.25mm
●Applications
Portable devices
Camera modules
Other electronic devices using microcontrollers or
logic circuits
●Typical Application Circuit
Vin
Cin
On
Off
VIN VOUT
BUxBxUSxDx2SMDG5 -M
Cout
Vout
STBY
GND
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
1/17
TSZ02201-0G6G0A300600-1-2
2016.05.31 Rev.003
1 page  
BUxxSD5 series
●Reference data BU18SD5WG (Unless otherwise specified, Ta=25℃.)
Datasheet
2.0
1.8
1.6
1.4
1.2
1.0 IOUT=0mA
IOUT=50mA
0.8 IOUT=200mA
0.6
0.4 Ta=25℃
0.2 VIN=VSTBY
0.0
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Input Voltage VIN (V)
Figure 3. Output Voltage vs. Input Voltage
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.78
IOUT=0mA
IOUT=50mA
IOUT=200mA
1.77
1.76
Ta=25℃
VIN=VSTBY
1.75
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Input Voltage VIN (V)
Figure 4. Line Regulation
60
Ta=105℃
50 Ta=25℃
Ta=-40℃
40
30
20
VIN=VSTBY
10 IOUT=0mA
0
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Input Voltage VIN (V)
Figure 5. Circuit Current vs. Input Voltage
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.78
1.77
1.76
1.75
0
Ta=25℃
Ta=-40℃
Ta=105℃
VIN=3.5V
VSTBY=1.5V
50 100 150
Output Current IOUT (mA)
Figure 6. Load Regulation
200
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/17
TSZ02201-0G6G0A300600-1-2
2016.05.31 Rev.003
5 Page 
BUxxSD5 series
●Input/Output Capacitor
It is recommended that an input capacitor is placed near pins
between the VCC pin and GND as well as an output capacitor
between the output pin and GND. The input is valid when the
power supply impedance is high or when the PCB trace has
significant length. For the output capacitor, the greater the
capacitance, the more stable the output will be depending on
the load and line voltage variations. However, please check the
actual functionality of this capacitor by mounting it on a board
for the actual application. Ceramic capacitors usually have
different, thermal and equivalent series resistance
characteristics, and may degrade gradually over continued
use.
For additional details, please check with the manufacturer,
and select the best ceramic capacitor for your application
Datasheet
Capacity value of ceramic capacitor - DC bias characteristics
(Example)
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
10-V withstand voltage
F characteristics
10-V withstand voltage
B1characteristics
GRM 188B11A105KA61D
10-V withstand voltage
B characteristics
6.3-V withstand voltage
B characteristics
10-V withstand voltage
F characteristics
4-V withstand voltage
X6S characteristics
0.5 1 1.5 2 2.5 3 3.5 4
DC Bias Voltage [V]
Figure 25. Capacity-bias characteristics
(Example)
●Equivalent Series Resistance (ESR) of a Ceramic Capacitor
Capacitors generally have ESR (equivalent series
resistance) and it operates stably in the ESR-IOUT area of
the output capacitor shown on the right. Since ceramic
capacitors, tantalum capacitors, electrolytic capacitors, etc.
generally have different ESR, please check the ESR of the
capacitor to be used and use it within the stability area
range shown in the right graph for evaluation of the actual
application.
Figure 26. Stability area characteristics
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/17
TSZ02201-0G6G0A300600-1-2
2016.05.31 Rev.003
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet BU18SD5.PDF ] | |
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