Document
A Product Line of Diodes Incorporated
AZ2940
1A ULTRA LOW DROPOUT LINEAR REGULATOR
Description
The AZ2940 is a low dropout three-terminal regulator with a typical dropout of 280mV at 1A output current.
The AZ2940 provides current limit and thermal shutdown. On-chip thermal shutdown provides protection against any combination of high current and ambient temperature that would create excessive junction temperatures.
The AZ2940 has 1.2V, 1.8V, 2.5V, 3.3V and 5.0V versions.
The AZ2940 series is available in the industry standard TO-220-3, TO-220F-3, TO-263-3, TO-252-2 (3), TO-252-2 (4), TO-252-2 (5) and SOT-223 power packages. (Detailed information please refer to pages 13, 14)
Features
Minimum Guaranteed Output Current: 1A Dropout Voltage at IOUT = 1A: 280mV Typ. (Except 1.2V and 1.8V
Versions) Output Accuracy: 1% Low Ground Current Internal Current Limit and Thermal Protection Reversed-battery and Reversed-lead Insertion Protection Fast Transient Response TO-220-3, TO-263-3, TO-252-2 (3), TO-252-2 (4), TO-252-2 (5)
Lead-Free Finish; RoHS Compliant (Notes 1 & 2) Available in “Green” Packages: TO-220-3, TO-220F-3, TO-263-3,
TO-252-2 (3), TO-252-2 (4), TO-252-2 (5) and SOT-223 Lead-Free Finish; RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3)
Applications
LCD TV Set Top Box LCD Monitor SMPS Post Regulator Laptop, Palmtop and Notebook Portable Instrumentation USB Power Supply
Notes:
1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Pin Assignments
(Front View)
3 2 1
TO-220-3 (Option 1)
(Front View)
3 2 1
TO-220-3 (Option 3)
AZ2940
Document number: DS37880 Rev. 3 - 2
VOUT GND VIN
VOUT GND VIN
1 of 29 www.diodes.com
(Front View)
3 2 1
TO-220-3 (Option 2) (Front View)
3 2 1
TO-220F-3
VOUT GND VIN
VOUT GND VIN
June 2015
© Diodes Incorporated
Pin Assignments (Cont.)
(Top View) 3 2 1
TO-263-3 (Top View)
VOUT GND VIN
3 VOUT 2 GND 1 VIN
TO-252-2 (4)
A Product Line of Diodes Incorporated
AZ2940
(Top View) 3 VOUT 2 GND 1 VIN
TO-252-2 (3) (Option 1) (Top View) 3 VOUT 2 GND 1 VIN TO-252-2 (5)
(Top View) 3 VOUT 2 GND 1 VIN
TO-252-2 (3) (Option 2) (Top View)
3 VOUT 2 GND 1 VIN
SOT-223
Typical Applications Circuit (Note 4)
VIN 1 VIN VOUT 3
+ CIN
AZ2940
GND
2
VOUT
+ COUT
Note 4:
CIN is required if regulator is located far from power supply filter and is recommended to be 0.47µF or greater. To maintain stability, COUT is recommended to be 2.2µF or greater. The ESR of this capacitor is critical, please see curve.
Pin Description
Pin Number 1 2 3
AZ2940
Document number: DS37880 Rev. 3 .