SULR1731-33DTR [SMC]
300mA, Low Dropout Linear Regulator with Shutdown;
| 型号： | SULR1731-33DTR |
| 厂家： | 
Sangdest Microelectronic (Nanjing) Co., Ltd |
| 描述： | 300mA, Low Dropout Linear Regulator with Shutdown |
| 文件： | 总11页 (文件大小：413K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
Description:
The SULR1731 is a 300mA low noise, low dropout linear regulator, and is housed in a small SOT-23-
——————
5 package. The device is in the “ON” state when the SHDN pin is set to logic high level. An internal
P MOSFET pass transistor is used to achieve 470mV low dropout voltage at 300mA load current. It
offers high precision output voltage of ±2%. The quality of low quiescent current and low dropout
voltage makes this device ideal for battery power applications. The internal reverse bias protection
eliminates the requirement for a reverse voltage protection diode. The high ripple rejection and low
noise of SULR1731 provide enhanced performance for critical applications. The noise bypass pin
can be connected an external capacitor to reduce the output noise level.
Features:
•
Active Low Shutdown Control.
•
•
•
•
•
•
Very Low Quiescent Current.
Very Low Dropout Voltage of 470mV at 300mA Output Current (3.0V Output Version)
1.3V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V Output Voltage.
Short Circuit and Thermal Protection.
±2% Output Tolerance.
Miniature Package: SOT-23-5.
Applications:
•
•
•
•
•
•
•
•
•
PDA
DSC
Notebook
Pagers
Personal Communication Equipment
Cordless Telephones
Portable Instrumentation
Portable Consumer Equipment
Battery Powered Systems
Typical application circuit:
Low Noise Low Dropout Linear Regulator
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SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
Ordering Information:
PIN CONFIGURATION
SULR1731-XXXXX
SOT-23-5
TOP VIEW
1: VIN
PACKING TYPE
TB: TUBE
2: GND
——————
TR: TAPING & REEL
3: SHDN
4: BP
5: VOUT
PACKAGING TYPE
D: SOT-23-5
OUTPUT VOLTAGE
13: 1.3V
15: 1.5V
18: 1.8V
25: 2.5V
28: 2.8V
30: 3.0V
33: 3.3V
Marking Diagram:
Part No.
Marking
SULR1731-15DTR
SULR1731-18DTR
SULR1731-25DTR
SULR1731-30DTR
SULR1731-33DTR
ED15G
ED18G
ED25G
ED30G
ED33G
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SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
Absolute Maximum Ratings:
Supply Voltage ………..................……………………………………………………………………….12V
Shutdown Terminal Voltage………………………...............……………………………………….… 8V
Noise Bypass Terminal Voltage ………………………………………………………………………..5V
Operating Temperature Range ...………………………………………………………… –40°C to 85°C
Maximum Junction Temperature …………………………………………………………………..125°C
Storage Temperature Range ……………………………………………………………..–65°C ~ 150°C
Lead Temperature (Soldering) 10 sec. ……………………………………………………………260°C
Thermal Resistance Junction to Case SOT-23-5 ………………………………………….…130°C/W
Thermal Resistance Junction to Ambient SOT-23-5…………………………………………220°C/W
(Assume no ambient airflow, no heatsink)
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
Test Circuit
Refer to TYPICAL APPLICATION CIRCUIT
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SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
Electrical Characteristics(CIN = 1μF , Cout = 4.7μF, TJ=25℃, unless otherwise specified)(Note 1)
Note: 1. To avoid output oscillation, aluminum electrolytic output capacitor is recommended and ceramic
capacitor is not suggested.
2. Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
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SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
Typical Performance Characteristics
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SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
Typical Performance Characteristics (Continued)
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SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
Typical Performance Characteristics (Continued)
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SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
Block Diagram
Pin Descriptions
PIN 1 : VIN
- Power supply input pin. Bypass with a 1μF capacitor to GND
PIN 2 : GND - Ground pin.
——————
PIN 3 : SHDN - Active-Low shutdown input pin.
PIN 4 : BP - Noise bypass pin. An external bypass capacitor connecting to BP pin to reduce noises at
the output.
PIN 5 : VOUT - Output pin. Sources up to 300mA.
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SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
Application Information
INPUT-OUTPUT CAPACITORS
Linear regulators require input and output capacitors to maintain stability. Input capacitor at 1μF with 1uF
aluminum electrolytic output capacitor is suggested.
NOISE BYPASS CAPACITOR
0.1μF bypass capacitor at BP pin reduces output voltage noise. And the BP pin has to connect a capacitor to
GND.
POWER DISSIPATION
The SULR1731 obtains thermal-limiting circuitry, which is designed to protect the device against overload
condition. For continuous load condition, maximum rating of junction temperature must not be exceeded. It is
important to pay more attention in thermal resistance. It includes junction to case, junction to ambient. The
maximum power dissipation of SULR1730 depends on the thermal resistance of its case and circuit board, the
temperature difference between the die junction and ambient air, and the rate of airflow. The rate of
temperature rise is greatly affected by the mounting pad configuration on the PCB, the board material, and the
ambient temperature. When the IC mounting with good thermal conductivity is used, the junction temperature
will be low even when large power dissipation applies.
The power dissipation across the device is P = I
(V -V ).
IN OUT
OUT
The maximum power dissipation is:
(TJ-MAX - TA)
PMAX
=
RΘJA
Where TJ-max is the maximum allowable junction temperature (125°C), and TA is the ambient temperature
suitable in application.
As a general rule, the lower temperature is, the better reliability of the device is. So the PCB mounting pad
should provide maximum thermal conductivity to maintain low device temperature. GND pin performs a dual
function of providing an electrical connection to ground and channeling heat away. Therefore, connecting the
GND pin to ground with a large pad or ground plane would increase the power dissipation and reduce the
device temperature.
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SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
Physical Dimensions
SOT-23-5 (unit: mm)
Note: 1. Refer to JEDEC MO-178AA.
2. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs
shall not exceed 10 mil per side.
3. Dimension "E1" does not include inter-lead flash or protrusions.
4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact.
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SULR1731
Technical Data
Data Sheet N1586 Rev. -
300mA, Low Dropout Linear Regulator with Shutdown
DISCLAIMER:
1- The information given herein, including the specifications and dimensions, is subject to change without prior notice to improve product
characteristics. Before ordering, purchasers are advised to contact the SMC - Sangdest Microelectronics (Nanjing) Co., Ltd sales
department for the latest version of the datasheet(s).
2- In cases where extremely high reliability is required (such as use in nuclear power control, aerospace and aviation, traffic equipment,
medical equipment , and safety equipment) , safety should be ensured by using semiconductor devices that feature assured safety or by
means of users’ fail-safe precautions or other arrangement .
3- In no event shall SMC - Sangdest Microelectronics (Nanjing) Co., Ltd be liable for any damages that may result from an accident or
any other cause during operation of the user’s units according to the datasheet(s). SMC - Sangdest Microelectronics (Nanjing) Co., Ltd
assumes no responsibility for any intellectual property claims or any other problems that may result from applications of information,
products or circuits described in the datasheets.
4- In no event shall SMC - Sangdest Microelectronics (Nanjing) Co., Ltd be liable for any failure in a semiconductor device or any
secondary damage resulting from use at a value exceeding the absolute maximum rating.
5- No license is granted by the datasheet(s) under any patents or other rights of any third party or SMC - Sangdest Microelectronics
(Nanjing) Co., Ltd.
6- The datasheet(s) may not be reproduced or duplicated, in any form, in whole or part, without the expressed written permission of SMC
- Sangdest Microelectronics (Nanjing) Co., Ltd.
7- The products (technologies) described in the datasheet(s) are not to be provided to any party whose purpose in their application will
hinder maintenance of international peace and safety nor are they to be applied to that purpose by their direct purchasers or any third
party. When exporting these products (technologies), the necessary procedures are to be taken in accordance with related laws and
regulations..
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