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REG102-33 PDF预览

REG102-33

更新时间: 2024-11-05 23:32:39
品牌 Logo 应用领域
其他 - ETC 稳压器
页数 文件大小 规格书
17页 322K
描述
DMOS 250 mA Low Dropout (LDO) Regulator

REG102-33 数据手册

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REG102  
R
E
G
1
0
2
R
E
G
1
0
2
SBVS024E – NOVEMBER 2000 – REVISED MARCH 2003  
DMOS  
250mA Low-Dropout Regulator  
DESCRIPTION  
FEATURES  
The REG102 is a family of low-noise, low-dropout linear  
regulators with low ground pin current. The new DMOS  
topology provides significant improvement over previous  
designs, including low-dropout voltage (only 150mV 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:  
150mV typ at 250mA  
Output Capacitor not Required for Stability  
FAST TRANSIENT RESPONSE  
VERY LOW NOISE: 28µVrms  
HIGH ACCURACY: ±1.5% max  
HIGH EFFICIENCY:  
Typical ground pin current is only 600µA (at IOUT = 250mA)  
and drops to 10nA when not enabled. Unlike regulators with  
PNP pass devices, quiescent current remains relatively con-  
stant over load variations and under dropout conditions.  
IGND = 600µA at IOUT = 250mA  
Not Enabled: IGND = 0.01µA  
2.5V, 2.8V, 2.85V, 3.0V, 3.3V, AND 5.0V  
ADJUSTABLE OUTPUT VERSIONS  
The REG102 has very low output noise (typically 28µVrms  
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 pa-  
rameters are tested over the specified temperature range  
(–40°C to +85°C).  
OTHER OUTPUT VOLTAGES AVAILABLE UPON  
REQUEST  
FOLDBACK CURRENT LIMIT  
THERMAL PROTECTION  
SMALL SURFACE-MOUNT PACKAGES:  
SOT23-5, SOT223-5, and SO-8  
The REG102 is well protected—internal circuitry provides a  
current limit that protects the load from damage; furthermore,  
thermal protection circuitry keeps the chip from being dam-  
aged by excessive temperature. The REG102 is available in  
SOT23-5, SOT223-5, and SO-8 packages.  
APPLICATIONS  
PORTABLE COMMUNICATION DEVICES  
BATTERY-POWERED EQUIPMENT  
PERSONAL DIGITAL ASSISTANTS  
MODEMS  
BAR-CODE SCANNERS  
BACKUP POWER SUPPLIES  
Enable  
Enable  
VOUT  
VIN  
VOUT  
VIN  
REG102  
(Fixed Voltage  
Versions)  
+
R1  
Adj  
R2  
+
+
+
0.1µF  
(1)  
(1)  
COUT  
REG102-A  
COUT  
0.1µF  
NR  
GND  
GND  
NOTE: (1) Optional.  
NR = Noise Reduction  
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.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2000-2003, Texas Instruments Incorporated  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
www.ti.com  

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