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REG103UA-3/2K5 PDF预览

REG103UA-3/2K5

更新时间: 2024-09-24 22:14:51
品牌 Logo 应用领域
BB 稳压器
页数 文件大小 规格书
19页 500K
描述
DMOS 500mA Low Dropout Regulator

REG103UA-3/2K5 技术参数

生命周期:Transferred包装说明:SO-8
Reach Compliance Code:unknown风险等级:5.65
最大回动电压 1:0.23 V最大输入电压:15 V
最小输入电压:3.9 VJESD-30 代码:R-PDSO-G8
功能数量:1端子数量:8
工作温度TJ-Max:85 °C工作温度TJ-Min:-40 °C
最大输出电流 1:0.5 A最大输出电压 1:3.084 V
最小输出电压 1:2.916 V标称输出电压 1:3 V
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
认证状态:Not Qualified调节器类型:FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
表面贴装:YES技术:NMOS
端子形式:GULL WING端子位置:DUAL
Base Number Matches:1

REG103UA-3/2K5 数据手册

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R
E
G
1
0
3
REG103  
REG103  
R
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G
1
0
3
SBVS010B – JANUARY 2000 – REVISED FEBRUARY 2004  
DMOS  
500mA Low-Dropout Regulator  
DESCRIPTION  
FEATURES  
The REG103 is a family of low-noise, low-dropout, linear  
regulators with low ground pin current. Its new DMOS  
topology provides significant improvement over previous  
designs, including low-dropout voltage (only 115mV typ at  
full load), and better transient performance. In addition, no  
output capacitor is required for stability, unlike conventional  
low-dropout regulators that are difficult to compensate and  
require expensive low ESR capacitors greater than 1µF.  
NEW DMOS TOPOLOGY:  
Ultra Low Dropout Voltage:  
115mV Typ at 500mA and 3.3V Output  
Output Capacitor NOT Required for Stability  
FAST TRANSIENT RESPONSE  
VERY LOW NOISE: 33µVrms  
HIGH ACCURACY: ±2% max  
HIGH EFFICIENCY:  
IGND = 1mA at IOUT = 500mA  
Not Enabled: IGND = 0.5µA  
2.5V, 2.7V, 3.0V, 3.3V, 5.0V, AND ADJUSTABLE  
Typical ground pin current is only 1mA (at IOUT = 500mA)  
and drops to 0.5µA in not enabled mode. Unlike regulators  
with PNP pass devices, quiescent current remains relatively  
constant over load variations and under dropout conditions.  
OUTPUT VERSIONS  
The REG103 has very low output noise (typically 33µVrms  
for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use  
in portable communications equipment. On-chip trimming  
results in high output voltage accuracy. Accuracy is main-  
tained over temperature, line, and load variations. Key  
parameters are tested over the specified temperature range  
(–40°C to +85°C).  
FOLDBACK CURRENT LIMIT  
THERMAL PROTECTION  
OUTPUT VOLTAGE ERROR INDICATOR(1)  
SMALL SURFACE-MOUNT PACKAGES:  
SOT223-5, DDPAK-5, SO-8  
The SO-8 version of the REG103 has an ERROR pin that  
provides a power good flag, indicating the regulator is in  
regulation. The REG103 is well protected—internal cir-  
cuitry provides a current limit that protects the load from  
damage. Thermal protection circuitry keeps the chip from  
being damaged by excessive temperature. In addition to the  
SO-8 package, the REG103 is also available in the DDPAK  
and the SOT223-5.  
APPLICATIONS  
PORTABLE COMMUNICATION DEVICES  
BATTERY-POWERED EQUIPMENT  
PERSONAL DIGITAL ASSISTANTS  
MODEMS  
BAR-CODE SCANNERS  
BACKUP POWER SUPPLIES  
ENABLE ERROR(1)  
ERROR1)  
ENABLE  
VOUT  
VIN  
VOUT  
VIN  
REG103  
(Fixed Voltage  
Versions)  
+
R1  
Adj  
R2  
+
+
+
0.1µF  
(2)  
(2)  
COUT  
REG103-A  
COUT  
0.1µF  
NR  
Gnd  
Gnd  
NR = Noise Reduction  
NOTE: (1) SO-8 Package Only. (2) Optional.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
Copyright © 2000-2004, Texas Instruments Incorporated  
www.ti.com  

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