UNISONIC TECHNOLOGIES CO., LTD
UC723 LINEAR INTEGRATED CIRCUIT
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Copyright © 2012 Unisonic Technologies Co., LTD QW-R103-006.B
ADJUSTABLE VOLTAGE
REGULATOR
DESCRIPTION
The UTC UC723 is a silicon monolithic integrated circuit, designed
for service as voltage regulator at output voltages, ranging from 2V ~
37V at current up to 150mA. It includes a temperature-compensated
reference amplifier, an error amplifier, a power series pass transistor,
and a current-limiting circuit.
FEATURES
*Up to 150mA Output Current
*Adjustable Output Voltage (From 2V ~ 37V)
*Positive and Negative Voltage Regulation
*Regulation in Excess of 10A with Suitable P ass Transistors
*Input and Output Short-Circuit Protection
*Load and Line Regulation< 0.03%
ORDERING INFORMATION
Ordering Number Package Packing
Lead free Halogen Free
UC723L-D14-T UC723G-D14-T DIP-14 Tube
(1) T: Tube
(2) D14 : DIP-14
(3) G: Halogen Free, L: Lead Free
UC723L-D14-T
(1)Packing Type
(2)Package Type
(3)Lead Free
UC723 LINEAR INTEGRATED CIRCUIT
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www.unisonic.com.tw QW-R103-006.B
BLOCK DIAGRAM
12
1
8
14
6 5 7 4 3 2
13
9
10
11
V0
V2
Frequency
Compensation
Current
Limit
Current
Sense
Inverting
input
V-
Non-
inverting
input
Vref
NC
NC
NC
V+
(Un regulated
input)
6.2V
15kΩ
500Ω25kΩ1kΩ1kΩ
150Ω20kΩ
300Ω
6.2V
5kΩ
30kΩ
100Ω
5pF
UC723 LINEAR INTEGRATED CIRCUIT
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www.unisonic.com.tw QW-R103-006.B
ABSOLUTE MAXIMUM RATINGS (TA=25°C)
PARAMETER SYMBOL VALUE UNIT
Supply Voltage(between V+ and V-) VCC 40 V
Pulse Voltage for 50ms VPULSE 50 V
Differential Input-Output Voltage VD 40 V
Different Input Voltage
(Between inverting and non-inverting inputs) VID ±5 V
Different Input Voltage
(Between Non-inverting Input and V-) VID 8 V
Current from Zener Diode Terminal IZ 25 mA
Power Dissipation PD 900 mW
Operating Temperature TOPR 0 ~ 70 °C
Storage Temperature TSTG -40 ~ 150 °C
Junction Temperature TJ 125 °C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional devic e operation is not implied.
ELECTRICAL CHARACTERISTICS
(TA=25°C, V+=VC=VIN=12V, VOUT=5V, IL=1mA, C1=100Pf, CREF=0, RSCP=0, unless otherwise specified, divider
impedance R1*R2 / (R1+R2) at non-inverting input, terminal 5=10KΩ)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Quiescent Regulator Current ICCQ I
L=0, VIN=30V 2.3 3.5 mA
Input Voltage Range VIN 9.5 40 V
Output Voltage Range VOUT 2 37 V
Differential Input-Output Voltage VIN-VOUT 3 38 V
Reference Voltage VREF 6.95 7.15 7.35 V
Line Regulation (Note 1) ΔVOUT
VIN=12V ~ 40V 0.6 1 %VO
VIN=12V ~ 15V 0.01 0.1
VIN=12V ~ 15V, TA=-55~125°C
Load Regulation (Note 1) ΔVOUT IL=1mA ~ 50mA 0.03 0.15 %VO
IL=1mA ~ 50mA, TA=-55 ~ 125°C 0.6
Output Voltage Temperature Coefficient ΔVOUT TA=-55~125°C 0.002 0.015 %/°C
Ripple Rejection (Note 2) RR f=50Hz ~ 10KHz 74 dB f=50Hz ~ 10KHz, CREF=5μF 86
TMIN<TTYP<TMAX 2.5
Short Circuit Limiting Current ILIM R
SCP=10Ω, VOUT=0 65 mA
Equivalent Noise RMS output Voltage
(Note 2) VN BW=100Hz ~ 10KHz, CREF=0 -20 μV
BW=100Hz ~ 10KHz, CREF=5μF 2.5
Note 1: Line and load regulation specifications are given for conditions of a constant chip temperature. For high
dissipation condition, temperature drifts must be separately taken in account.
2: For CREF, see Fig. 1
UC723 LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 4 of 4
www.unisonic.com.tw QW-R103-006.B
APPLICATION CIRCUIT
1112
610
2
3
4
137
5
VIN
VOUT
Rscp
Vref
R1
R2
R3
C1
0.001μF
UTC UC723
Regulator Output Voltage=5V
Line Regulation (ΔVIN=3V)=0.5mV
Load Regulation (ΔIL=1A)=5mA
Fig. 3 Positive Voltage Regulator circuit
(with external p-n-p pass transistor)
1112
610
2
3
4
137
5
VIN
VOUT
Rscp
C1
100pF
UTC UC723
Regulator Output Voltage=15V
Line Regulation (ΔVIN=3V)=1.5mV
Load Regulation (ΔIL=1A)=15mA
R2
R1
Fig. 4 Positive Voltage Regulator circuit
(with external n-p-n pass transistor)
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) li sted in products specif icati ons of any and all UTC products described or contai ned
herein. UTC products are not designed for use in life support appliances, devices or systems where
m alf unction of these product s can be reasonably ex pected to result i n personal i njury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this docum ent does not f orm part of any quotat ion or contr act, i s bel iev ed to be accurate
and rel iabl e and may be changed wit hout not ice.
