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AZ2085
3A LOW DROPOUT LINEAR REGULATOR
Description
The AZ2085 series is low dropout positive voltage regulators with a maximum dropout of 1.5V at 3A of load current.
The device features on-chip thermal shutdown. It also includes a bandgap reference and a current limiting circuit.
The AZ2085 is available in adjustable version. The adjustable version can set the output voltage with two external resistors.
The AZ2085 series is available in standard packages of TO252-2 (3) and TO252-2 (5).
Applications
High Efficiency Linear Regulators Battery Charger Digital Video/Camcorder Post Regulation for Switching Supplies Microprocessor Supply Mother Board Power Supplies DVD-video Player Telecom Equipment Set Top Boxes and Web Boxes Modules' Supply
Features
Low Dropout Voltage: Typical 1.2V at 3A Current Limiting and Thermal Protection Output Current: 3A Current Limit: 4.5A Operating Junction Temperature: 0 to +125°C Line Regulation: 0.015% (Typ) Load Regulation: 0.1% (Typ) Adjust Pin Current: 6μA (Typ) Minimum Load Current: 0.3mA (Typ) Compatible with Low ESR Ceramic Capacitor Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 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
(Top View) 3 2 1
INPUT OUTPUT ADJ/GND
(TO252-2 (3) Option 1/ D Package)
(Top View)
3
INPUT
2
OUTPUT
1
ADJ/GND
(TO252-2 (3) Option 2/ D Package)
(Top View)
3 2 1
INPUT OUTPUT ADJ/GND
(TO252-2 (5)/ D Package)
AZ2085
Document number: DS36595 Rev. 4 - 4
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Typical Applications Circuit
AZ2085
VIN
AZ2085
3
2
INPUT OUTPUT
ADJ/GND
CIN=10µF
1
R1
R2 VOUT = VREF * (1+R2/R1 ) + IADJ * R2
VOUT COUT=22µF
Pin Descriptions
Pin Number 1 2 3
Pin Name ADJ/GND OUTPUT
INPUT
Adjust pin/Ground Output voltage Input voltage
Function
AZ2085
Document number: DS36595 Rev. 4 - 4
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Functional Block Diagram
AZ2085
3 INPUT
A1
A2
B
Thermal
-
Protection
+
2 OUTPUT
For Adjustable Output, disconnect A1 and A2, connect B
1 ADJ/ GND
AZ2085
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AZ2085
Absolute Maximum Ratings (Note 4)
Symbol
Parameter
Rating
Unit
VIN
Input Voltage
18
V
TJ
Operating Junction Temperature
+150
°C
TSTG
Storage Temperature Range
-65 to +150
°C
TLEAD θJA
Lead Temperature (Soldering, 10sec) Thermal Resistance (Junction to Ambient)
+260 100
°C °C/W
—
ESD (Human Body Model)
2000
V
Note 4: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Symbol VIN TJ
Parameter Input Voltage Operating Junction Temperature
Min
Max
Unit
—
12
V
0
+125
°C
AZ2085
Document number: DS36595 Rev. 4 - 4
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AZ2085
Electrical Characteristics (Typicals and limits appearing in normal type apply for TJ = +25ºC. Limits appearing in Boldface type
apply over the entire operating junction temperature range 0 to +125ºC.)
Symbol
Parameter
VREF
Reference Voltage
ΔVOUT/VOUT Load Regulation
ΔVOUT/ΔVIN Line Regulation
VDROP
Dropout Voltage
ILIMIT
Current Limit
ILOAD
Minimum Load Current
IADJ
Adjust Pin Current
ΔIADJ
Adjust Pin Current Change
PSRR
Ripple Rejection
—
Long Term Stability
—
Temperature Stability
—
RMS Noise (% of VOUT)
—
OTSD
—
OTSD Hysteresis
—
Pulse Current
Thermal Resistance
θJC
(Junction to Case)
Conditions IOUT = 10mA, VIN-VOUT = 3V, TJ = +25°C, 10mA ≤ IOUT ≤ 3A, 1.5V ≤ VIN-VOUT ≤ 5V 0A ≤ IOUT ≤ 3A, VIN-VOUT = 3V IOUT = 10mA, 2.85V ≤ VIN ≤ 10V IOUT = 3A, ΔVREF, ΔVOUT = 1% VIN-VOUT = 3V
VIN = 10V
VIN = 4.25V, IOUT = 10mA
10mA ≤ IOUT ≤ 3A, 1.5V ≤ VIN-VOUT ≤ 6V fRIPPLE = 120Hz, COUT = 22μF, IOUT = 3A, VIN-VOUT = 3V TA = +125°C, 1000Hrs
IOUT = 10mA, VIN-VOUT = 1.5V
TA = +125°C, 10.