Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UZ2085A
Preliminary
LINEAR INTEGRATED CIRCUIT
3A ADJUSTABLE/FIXED LOW
DROPOUT LINEAR REGULATOR

DESCRIPTION
The UTC UZ2085A series are low dropout three-terminal
regulators with 3A output current capability. These devices have been
optimized for low voltage applications including VTT bus termination in
which transient response and minimum input voltage are critical.
Current limit is trimmed to ensure specified output current and
controlled short-circuit current. On-chip thermal limitation provides
protection against any combination of overload and ambient
temperature that would create excessive junction temperature.

FEATURES
* Fast transient response
* Low dropout voltage at up to 3A
* Trimmed current limit
* On-chip thermal limiting
* Ultra low current consumption (0.35mA typ.)
* Ultra low Adjustment Current (7μA typ.)
* Ultra low minimum Load (0.3mA typ.)
* Stable with low ESR ceramic output capacitor (MLCC)

RDERING INFORMATION
Ordering Number
Pin Assignment
Package
Lead Free
Halogen Free
1
2
3
UZ2085AL-xx-TN3-T
UZ2085AG-xx-TN3-T
TO-252
A/G
O
I
UZ2085AL-xx-TN3-R
UZ2085AG-xx-TN3-R
TO-252
A/G
O
I
Note: 1. xx: Output Voltage, refer to Marking Information.
2. A: ADJ (for adjustable regulator), G: GND (for fixed regulator), O: VOUT, I: VIN
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Copyright © 2013 Unisonic Technologies Co., Ltd
Packing
Tube
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UZ2085A
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Preliminary
LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
TO-252
AD:ADJ
MARKING
BLOCK DIAGRAM
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UZ2085A
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Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
18
V
Power Dissipation
PD
Internally Limited
W
Junction Temperature
TJ
+150
°C
Operating Temperature
TOPR
-20 ~ +85
°C
Storage Temperature
TSTG
-40 ~ +150
°C
Note:1 Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case

SYMBOL
θJA
θJC
RATINGS
118
12
UNIT
°C/W
°C/W
ELECTRICAL CHARACTERISTICS (TA=25°C, COUT=22μF, unless otherwise specified.)
For UZ2085A-ADJ (Adjustable Voltage)
PARAMETER
SYMBOL
Reference Voltage
VREF
Line Regulation
∆VOUT
Load Regulation
∆VOUT
Dropout Voltage
VD
Current Limit
ILIMIT
Adjust Pin Current
IADJ
Adjust Pin Current Change
∆IADJ
Minimum Load Current
IO(MIN)
Ripple Rejection
RR
Thermal Regulation
Temperature Stability
∆VOUT
Long-Term Stability
∆VOUT
Output Noise(% of VOUT)
eN
Thermal Shutdown
TEST CONDITIONS
1.5V≤(VIN - VOUT) ≤8.25V, 10mA≤IOUT≤3A
(VOUT +1.5V)≤ VIN ≤12V, IOUT=10mA
(VIN -VOUT)=3V, 10mA ≤ IOUT ≤3A
∆VREF%=1%, lOUT=3A
(VIN-VOUT)=2V
(VOUT +1.5V)≤VIN≤12V, 10mA ≤ IOUT ≤3A
(VOUT +1.5V) ≤ VIN ≤ 12V
f=120Hz,Tantalum,(VIN-VOUT)=3V IOUT=3A
TA=25°C,30ms pulse
TA =125°C, 1000hr
TA =25°C,10Hz ≤ f ≤10kHz
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN.
0.98
3.1
TYP.
1.0
0.005
0.05
1.2
5.8
7
0.3
0.3
45
0.004
0.5
0.03
0.003
150
MAX.
1.02
0.2
0.5
1.40
10
2
1
0.02
1.0
UNIT
V
%
%
V
A
μA
μA
mA
dB
%/W
%
%
%
°C
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UZ2085A
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Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
UZ2085A-ADJ
VOUT
VIN
VIN=12V
+
22μF
ADJ
VOUT=VREF(1+R2/R1)+IADJ×R2
9V at 3A
R1
0.93kΩ
+
22μF
R2
7.4kΩ
The UTC UZ2085A also supports MLCC.
UZ2085A-ADJ
VOUT
VIN
VIN=12V
22μF
ADJ
VOUT=VREF(1+R2/R1)+IADJ*R2
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
9V at 3A
R1
0.93kΩ
22μF
R2
7.4kΩ
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UZ2085A
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Power (W)

Preliminary
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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