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REG113-33 PDF预览

REG113-33

更新时间: 2024-11-19 23:32:43
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其他 - ETC 稳压器
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14页 249K
描述
DMOS 400mA Low-Dropout Regulator

REG113-33 数据手册

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REG113  
SBVS031C – MARCH 2001 – REVISED MARCH 2003  
DMOS  
400mA Low-Dropout Regulator  
DESCRIPTION  
FEATURES  
The REG113 is a family of low-noise, low-dropout linear  
regulators with low ground pin current. Its new DMOS topol-  
ogy provides significant improvement over previous designs,  
including low-dropout voltage (only 250mV 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 re-  
quire expensive low ESR capacitors greater than 1µF.  
CAP-FREE DMOS TOPOLOGY:  
Ultra Low Dropout Voltage:  
250mV typ at 400mA  
Output Capacitor not Required for Stability  
UP TO 500mA PEAK, TYPICAL  
FAST TRANSIENT RESPONSE  
VERY LOW NOISE: 28µVrms  
HIGH ACCURACY: ±1.5% max  
HIGH EFFICIENCY:  
Typical ground pin current is only 850µA (at IOUT = 400mA)  
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 = 850µA at IOUT = 400mA  
Not Enabled: IGND = 0.01µA  
The REG113 has very low output noise (typically 28µVrms  
for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use  
in portable communications equipment. Accuracy is main-  
tained over temperature, line, and load variations. Key  
parameters are tested over the specified temperature range  
(–40°C to +85°C).  
2.5V, 2.85V, 3.0V, 3.3V, AND 5.0V OUTPUT VERSIONS  
OTHER OUTPUT VOLTAGES AVAILABLE UPON  
REQUEST  
FOLDBACK CURRENT LIMIT  
THERMAL PROTECTION  
SMALL SURFACE-MOUNT PACKAGES:  
SOT23-5 and MSOP-8  
The REG113 is well protected—internal circuitry provides a  
current limit which protects the load from damage, further-  
more, thermal protection circuitry keeps the chip from being  
damaged by excessive temperature. The REG113 is avail-  
able in SOT23-5 and MSOP-8 packages.  
APPLICATIONS  
PORTABLE COMMUNICATION DEVICES  
BATTERY-POWERED EQUIPMENT  
PERSONAL DIGITAL ASSISTANTS  
MODEMS  
Enable  
VOUT  
VIN  
+
+
0.1µF  
(1)  
REG113  
BAR-CODE SCANNERS  
COUT  
BACKUP POWER SUPPLIES  
NR(2)  
GND  
NOTES: (1) Optional. (2) 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 © 2001-2003, 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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