UA723CNR [TI]
PRECISION VOLTAGE REGULATORS; 精密稳压器
| 型号： | UA723CNR |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | PRECISION VOLTAGE REGULATORS |
| 文件： | 总17页 (文件大小：468K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
D OR N PACKAGE
(TOP VIEW)
150-mA Load Current Without External
Power Transistor
Adjustable Current-Limiting Capability
Input Voltages up to 40 V
NC
CURR LIM
CURR SENS
IN–
NC
1
2
3
4
5
6
7
14
13
12
11
10
9
FREQ COMP
Output Adjustable From 2 V to 37 V
Direct Replacement for Fairchild µA723C
V
CC+
V
C
OUTPUT
IN+
description
REF
V
Z
NC
8
V
CC–
The µA723 is a precision integrated-circuit
voltage regulator, featuring high ripple rejection,
excellent input and load regulation, excellent temperature stability, and low standby current. The circuit consists
of a temperature-compensated reference-voltage amplifier, an error amplifier, a 150-mA output transistor, and
an adjustable-output current limiter.
The µA723 is designed for use in positive or negative power supplies as a series, shunt, switching, or floating
regulator. For output currents exceeding 150 mA, additional pass elements can be connected as shown in
Figures 4 and 5.
The µA723C is characterized for operation from 0°C to 70°C.
AVAILABLE OPTIONS
PACKAGED DEVICES
CHIP
PLASTIC
DIP
SMALL
OUTLINE
(D)
FORM
(Y)
T
A
(N)
0°C to 70°C µA723CN
µA723CD
µA723Y
The D package is available taped and reeled. Add the suffix
R to the device type (e.g., µA723CDR). Chip forms are
tested at 25°C.
functional block diagram
V
CC+
FREQ COMP
Temperature-
Compensated
Reference Diode
V
C
–
Series Pass
Transistor
IN–
IN+
Error
Ref
Amp
REF
Amp
+
Current
Source
Regulated
Output
Current
Limiter
V
CC–
CURR LIM CURR SENS
V
Z
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1999, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
schematic
V
CC+
V
C
1 kΩ
500 Ω
15 kΩ
1 kΩ
25 kΩ
15 kΩ
OUTPUT
6.2 V
100 Ω
V
Z
5 pF
30 kΩ
5 kΩ
FREQ COMP
CURR LIM
300 Ω
20 kΩ
150 Ω
CURR SENS
REF
IN+
V
CC–
IN–
Resistor and capacitor values shown are nominal.
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Peak voltage from V
Continuous voltage from V
to V
(t ≤ 50 ms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 V
CC– w
CC+
to V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 V
CC+
CC–
Input-to-output voltage differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 V
Differential input voltage to error amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5 V
Voltage between noninverting input and V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 V
CC–
Current from V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mA
Z
Current from REF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 mA
Package thermal impedance, θ (see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86°C/W
JA
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . 101°C/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or N package . . . . . . . . . . . . . . . . 260°C
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
Stresses beyond 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-rated conditions for extended periods may affect device reliability.
NOTES: 1. Maximum power dissipation is a function of T (max), θ , and T . The maximum allowable power dissipation at any allowable
J
JA
A
ambient temperature is P = (T (max) – T )/θ . Operating at the absolute maximum T of 150°C can impact reliability.
D
J
A
JA
J
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
recommended operating conditions
MIN
9.5
2
MAX
40
UNIT
V
Input voltage, V
I
Output voltage, V
37
V
O
Input-to-output voltage differential, V – V
3
38
V
C
O
Output current, I
150
70
mA
°C
O
Operating free-air temperature range, T
µA723C
0
A
electrical characteristics at specified free-air temperature (see Notes 3 and 4)
µA723C
TYP
0.1
PARAMETER
TEST CONDITIONS
V = 12 V to V = 15 V
UNIT
T
A
MIN
MAX
25°C
25°C
1
5
3
I
I
Input regulation
V = 12 V to V = 40 V
1
mV/V
I
I
V = 12 V to V = 15 V
0°C to 70°C
25°C
I
I
f = 50 Hz to 10 kHz,
f = 50 Hz to 10 kHz,
C
C
= 0
74
86
ref
ref
Ripple rejection
dB
= 5 µF
25°C
25°C
–0.3
–2
–6
7.5
4
Output regulation
mV/V
0°C to 70°C
25°C
Reference voltage, V
Standby current
6.8
7.15
2.3
V
ref
V = 30 V,
I
I
O
= 0
25°C
mA
Temperature coefficient of output voltage
Short-circuit output current
0°C to 70°C
25°C
0.003 0.015
%/°C
mA
R
= 10 Ω,
V
= 0
65
20
SC
O
BW = 100 Hz to 10 kHz,
BW = 100 Hz to 10 kHz,
C
C
= 0
25°C
ref
ref
Output noise voltage
µV
= 5 µF
25°C
2.5
NOTES: 3. For all values in this table, the device is connected as shown in Figure 1 with the divider resistance as seen by the error amplifier
≤ 10 kΩ. Unless otherwise specified, V = V = V = 12 V, V = 0, V = 5 V, I = 1 mA, R = 0, and C = 0.
I
CC+
C
CC–
O
O
SC
ref
4. Pulse-testing techniques must be used that will maintain the junction temperature as close to the ambient temperature as possible.
electrical characteristics, T = 25°C (see Notes 3 and 4)
A
µA723Y
TYP
0.1
PARAMETER
TEST CONDITIONS
V = 12 V to V = 15 V
UNIT
mV/V
dB
MIN
MAX
I
I
Input regulation
V = 12 V to V = 40 V
1
I
I
f = 50 Hz to 10 kHz,
f = 50 Hz to 10 kHz,
C
C
= 0
74
ref
ref
Ripple rejection
= 5 µF
86
Output regulation
–0.3
7.15
2.3
mV/V
V
Reference voltage, V
ref
Standby current
V = 30 V,
I
= 0
mA
mA
I
O
Short-circuit output current
Output noise voltage
R
= 10 Ω,
V
= 0
65
SC
O
BW = 100 Hz to 10 kHz,
BW = 100 Hz to 10 kHz,
C
C
= 0
20
ref
ref
µV
= 5 µF
2.5
NOTES: 3. For all values in this table, the device is connected as shown in Figure 1 with the divider resistance as seen by the error amplifier
≤ 10 kΩ. Unless otherwise specified, V = V = V = 12 V, V = 0, V = 5 V, I = 1 mA, R = 0, and C = 0.
I
CC+
C
CC–
O
O
SC
ref
4. Pulse-testing techniques must be used that will maintain the junction temperature as close to the ambient temperature as possible.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
APPLICATION INFORMATION
Table 1. Resistor Values (kΩ) for Standard Output Voltages
OUTPUT ADJUSTABLE
FIXED OUTPUT
±10%
(SEE NOTE 6)
OUTPUT
VOLTAGE
(V)
APPLICABLE
FIGURES
(SEE NOTE 5)
±5%
R1
R2
R1
P1
P2
(kΩ)
(kΩ)
(kΩ)
(kΩ )
(kΩ )
3.0
3.6
5.0
6.0
9.0
12
1, 5, 6, 9, 11, 12 (4)
1, 5, 6, 9, 11, 12 (4)
1, 5, 6, 9, 11, 12 (4)
1, 5, 6, 9, 11, 12 (4)
2, 4, (5, 6, 9, 12)
2, 4, (5, 6, 9, 12)
2, 4, (5, 6, 9, 12)
2, 4, (5, 6, 9, 12)
7
4.12
3.57
2.15
1.15
1.87
4.87
7.87
21.0
3.57
3.57
3.57
3.57
3.01
3.65
4.99
6.04
7.15
7.15
7.15
7.15
48.7
78.7
105
1.8
1.5
0.75
0.5
0.75
2.0
3.3
5.6
2.2
2.2
2.2
2.2
0.5
0.5
0.5
0.5
1.0
1.0
1.0
1.0
10
1.2
1.5
2.2
2.7
2.7
3.0
3.0
2.0
39
15
28
45
75
7
10
68
100
250
7
10
91
7
255
10
240
–6
3, 10
3.57
2.43
1.2
0.5
0.75
(see Note 7)
–9
–12
–15
–28
–45
–100
–250
3, 10
3, 10
3, 10
3, 10
8
3.48
3.57
3.57
3.57
3.57
3.57
3.57
5.36
8.45
11.5
24.3
41.2
95.3
249
1.2
1.2
1.2
1.2
2.2
2.2
2.2
0.5
0.5
0.5
0.5
10
2.0
3.3
4.3
10
33
8
10
91
8
10
240
NOTES: 5. The R1/R2 divider can be across either V or V
. If the divider is across
, use the figure numbers without parentheses. If the divider is across
O
(ref)
V
V
(ref)
, use the figure numbers in parentheses.
O
6. To make the voltage adjustable, the R1/R2 divider shown in the figures must
be replaced by the divider shown below.
R1
P1
R2
Adjustable Output Circuit
7. ForFigures3,8,and10,thedevicerequiresaminimumof9VbetweenV
CC+
and V
when V is equal to or more positive than –9 V.
O
CC–
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
APPLICATION INFORMATION
Table 2. Formulas for Intermediate Output Voltages
OUTPUTS FROM 2 V TO 7 V
SEE FIGURES 1, 5, 6, 9, 11, 12 (4)
AND NOTE 5
OUTPUTS FROM 4 V TO 250 V
SEE FIGURE 7 AND NOTE 5
CURRENT LIMITING
V(
)
ref
R2 – R1
R1
0.65 V
I(limit)
R2
R1 R2
VO
R3
VO
V(ref)
2
R4
RSC
OUTPUTS FROM 7 V TO 37 V
SEE FIGURES 2, 4, (5, 6, 9, 11, 12)
AND NOTE 5
OUTPUTS FROM –6 V TO –250 V
SEE FIGURES 3, 8, 10
FOLDBACK CURRENT LIMITING
SEE FIGURE 6
AND NOTES 5 AND 7
VOR3
(R3 R4) 0.65 V
SCR4
V(
)
ref
I(knee)
R1 R2
R1
VO
R3
–
R
R1 R2
2
VO
V(ref)
R2
R4
0.65 V
RSC
R3 R4
R4
IOS
NOTES: 5. The R1/R2 divider can be across either V or V
. If the divider is across V
, use figure numbers without parentheses. If the
and V when V is equal to or more positive than
CC–
O
(ref) (ref)
divider is across V , use the figure numbers in parentheses.
O
7. For Figures 3, 8, and 10, the device requires a minimum of 9 V between V
–9 V.
CC+
O
V
I
V
C
V
CC+
OUTPUT
µA723
REF
V
Z
R
SC
Regulated
Output, V
CURR LIM
R1
O
CURR SENS
IN+
V
IN–
R3 (see Notes A and B)
100 pF
C
FREQ COMP
(ref)
CC–
R2
R1 R2
R1 R2
NOTES: A. R3
for a minimum
V
O
B. R3 can be eliminated for minimum component count. Use direct connection (i.e., R = 0).
3
Figure 1. Basic Low-Voltage Regulator (V = 2 V to 7 V)
O
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
APPLICATION INFORMATION
V
I
V
C
V
CC+
OUTPUT
µA723
REF
V
Z
R
SC
Regulated Output,
R3
CURR LIM
V
O
(see Notes A and B)
CURR SENS
IN+
IN–
R1
FREQ COMP
V
CC–
R2
100 pF
R1 R2
R1 R2
NOTES: A. R3
for a minimum
V
O
B. R3 can be eliminated for minimum component count. Use direct connection (i.e., R = 0).
3
Figure 2. Basic High-Voltage Regulator (V = 7 V to 37 V)
O
V
I
2 kΩ
R2
V
C
V
CC+
OUTPUT
µA723
2N5001
V
Z
REF
CURR LIM
R4 = 3 kΩ
CURR SENS
IN–
Regulated Output,
IN+
V
O
FREQ COMP
V
CC–
R3 =
3 kΩ
R1
100 pF
Figure 3. Negative-Voltage Regulator
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
APPLICATION INFORMATION
V
I
V
C
V
CC+
OUTPUT
µA723
2N3997
SC
REF
V
Z
CURR LIM
CURR SENS
R
IN+
IN–
Regulated Output,
FREQ COMP
V
CC–
V
O
R1
R2
500 pF
Figure 4. Positive-Voltage Regulator (External npn Pass Transistor)
V
I
60 Ω
2N5001
V
C
V
CC+
OUTPUT
µA723
REF
V
Z
CURR LIM
R1
R2
R
CURR SENS
SC
Regulated Output,
IN+
IN–
V
O
FREQ COMP
V
CC–
1000 pF
Figure 5. Positive-Voltage Regulator (External pnp Pass Transistor)
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
APPLICATION INFORMATION
V
I
V
V
C
CC+
R
SC
Regulated Output,
OUTPUT
µA723
V
O
REF
V
Z
R3
R4
CURR LIM
R1
R2
I
OS
CURR SENS
V
O
IN+
V
l
IN–
knee
FREQ COMP
I
CC–
O
1000 pF
Figure 6. Foldback Current Limiting
V
I
2 kΩ
V
C
V
CC+
2N2580
1N1826
OUTPUT
µA723
REF
IN+
V
Z
R4 =
3 kΩ
CURR LIM
R1
R2
R
= 1 Ω
SC
CURR SENS
IN–
R3 =
3 kΩ
FREQ COMP
V
CC–
500 pF
Regulated Output,
V
O
Figure 7. Positive Floating Regulator
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
APPLICATION INFORMATION
V
I
10 kΩ
V
C
V
CC+
10 kΩ
OUTPUT
µA723
1N759
R3 =
2N5287
REF
V
Z
CURR LIM
R2
R1
3 kΩ
CURR SENS
IN+
IN–
FREQ COMP
V
CC–
R4 =
500 pF
3 kΩ
Regulated Output,
V
O
Figure 8. Negative Floating Regulator
V
I
3 kΩ
2N5153
2N5005
V
C
V
CC+
L = 1.2 mH
(see Note A)
OUTPUT
µA723
REF
V
Z
51 Ω
Regulated Output,
CURR LIM
V
O
R1
CURR SENS
IN–
1 kΩ
IN+
1N4005
FREQ COMP
V
CC–
1 MΩ
R2
0.1 µF
NOTE A: L is 40 turns of No. 20 enameled copper wire wound on Ferroxcube P36/22-3B7 potted core, or equivalent, with a 0.009-inch air gap.
Figure 9. Positive Switching Regulator
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
APPLICATION INFORMATION
V
I
1 kΩ
(see Note A)
R3 =
3 kΩ
2N3997
220 Ω
V
C
V
CC+
R2
OUTPUT
µA723
0.1 µF
REF
V
2N5004
Z
CURR LIM
CURR SENS
1 kΩ
IN+
IN–
FREQ COMP
V
CC–
R4 =
1 MΩ
R1
3 kΩ
15 pF
L = 1.2 mH
(see Note B)
1N4005
Regulated Output,
V
O
100 µF
NOTES: A. The device requires a minimum of 9 V between V
and V
when V is equal to or more positive than –9 V.
CC– O
CC+
B. L is 40 turns of No. 20 enameled copper wire wound on Ferroxcube P36/22-3B7 potted core, or equivalent, with a 0.009-inch
air gap.
Figure 10. Negative Switching Regulator
V
I
V
V
C
CC+
R
SC
Regulated Output,
OUTPUT
µA723
V
O
REF
V
Z
CURR LIM
R1
R2
CURR SENS
IN+
V
IN–
FREQ COMP
CC–
2N4422
2 kΩ
2 kΩ
Input From
1000 pF
Series 54/74 Logic
NOTE A: A current-limiting transistor can be used for shutdown if current limiting is not required.
Figure 11. Remote Shutdown Regulator With Current Limiting
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
APPLICATION INFORMATION
V
I
100 Ω
V
C
V
CC+
OUTPUT
µA723
1 kΩ
REF
2N3997
V
Z
CURR LIM
R1
CURR SENS
IN+
V
Regulated Output,
IN–
V
O
FREQ COMP
CC–
R2
5000 pF
Figure 12. Shunt Regulator
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
11-Feb-2005
PACKAGING INFORMATION
Orderable Device
UA723CD
Status (1)
ACTIVE
ACTIVE
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
SOIC
D
14
50
Pb-Free
(RoHS)
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
UA723CDR
SOIC
D
14
2500
Pb-Free
(RoHS)
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
UA723CJ
UA723CN
OBSOLETE
ACTIVE
CDIP
PDIP
J
14
14
None
Call TI
Call TI
N
25
Pb-Free
(RoHS)
CU NIPDAU Level-NC-NC-NC
UA723CNSR
ACTIVE
SO
NS
14
2000
Pb-Free
(RoHS)
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional
product content details.
None: Not yet available Lead (Pb-Free).
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens,
including bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder
temperature.
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provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
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Addendum-Page 1
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