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.
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.
APPLICATIONS
Voltage Regulator for LAN Cards.
Wireless Communication Systems.
Battery Powered Systems.
TYPICAL APPLICATION CIRCUIT
VIN
V
IN
AIC1721/
AIC1721D
VOUT
V
OUT
GND
+
1µF
C
IN
+
10µF
C
OUT
Negative Voltage Regulator
Analog Integrations Corporation
DS-1721-01
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
1
AIC [ ANALOG INTERGRATIONS CORPORATION ]
