AIC1721 Datasheet, PDF (1/6 Pages) Analog Intergrations Corporation – 3-pin Low Dropout Linear Regulator

AIC1721/1721D
3-pin Low Dropout Linear Regulator
FEATURES
Low Dropout Voltage of 130mV at 100mA Output
Current (5V Output Version).
Guaranteed 150mA/300mA Output Current.
Internal 1.3Ω P-MOSFET Draws no Base Current.
Low Ground Current at 55µA.
1% Accuracy Output Voltage of 3.3V/5V.
Input Voltage Range up to 12V (5V Output
Version).
Extremely Tight Load and Line Regulation.
Fast Transient Response.
Needs only 1µF for Stability.
Current and Thermal Limiting.
APPLICATIONS
Voltage Regulator for LAN Cards.
Wireless Communication Systems.
Battery Powered Systems.
DESCRIPTION
The AIC1721/1721D is the enhanced CMOS
version of the LP2950. The superior
characteristics of the AIC1721/1721D include
zero base current loss, very low dropout voltage,
and 1% accuracy output voltage. Typica-l ground
current remains approximately 55µA, from no
load to maximum loading conditions. Dropout
voltage at 100mA output current is significantly
lower than its bipolar counterpart: 130mV for the
AIC1721-5/1721D-5, and 180mV for the
AIC1721/ 1721D. Output current limiting and
thermal limiting are built in to provide maximal
protection to the AIC1721/ 1721D against fault
conditions.
While pin-to-pin compatible with the LP2950 and
the industry industry standard 78XX series of
voltage regulators, the AIC1721/1721D comes in
the popular3-pin SOT-89 or TO-92 packages.
TYPICAL APPLICATION CIRCUIT
VIN ^AIC1721/
AIC1721D
V_IN
+ _1µF
C_IN
GND
VOUT
V_OUT
+ _10µF
C_OUT
Negative Voltage Regulator
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
DS-1721-01
TEL: [phone] FAX: [phone]
www.analog.com.tw
1