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uA723CN Datasheet Preview

uA723CN Datasheet

PRECISION VOLTAGE REGULATORS

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µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
D 150-mA Load Current Without External
Power Transistor
D OR N PACKAGE
(TOP VIEW)
D Adjustable Current-Limiting Capability
D Input Voltages up to 40 V
D Output Adjustable From 2 V to 37 V
D Direct Replacement for Fairchild µA723C
NC 1
CURR LIM 2
CURR SENS 3
IN– 4
14 NC
13 FREQ COMP
12 VCC+
11 VC
IN+ 5 10 OUTPUT
description
REF 6
9 VZ
The µA723 is a precision integrated-circuit
VCC– 7
8 NC
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.
functional block diagram
AVAILABLE OPTIONS
PACKAGED DEVICES
CHIP
TA
PLASTIC
DIP
SMALL
OUTLINE
FORM
(Y)
(N)
(D)
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.
VCC+
FREQ COMP
Temperature-
Compensated
Reference Diode
Current
Source
Ref
Amp
IN–
REF
IN+
Error
Amp
Current
Limiter
VC
Series Pass
Transistor
Regulated
Output
VCC–
CURR LIM CURR SENS
VZ
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.
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1999, Texas Instruments Incorporated
1




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uA723CN Datasheet Preview

uA723CN Datasheet

PRECISION VOLTAGE REGULATORS

No Preview Available !

µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
schematic
500
25 k
1 k
VCC+ VC
1 k
15 k
15 k
OUTPUT
5 pF
100
30 k
5 k
300 20 k
150
6.2 V
VZ
FREQ COMP
CURR LIM
CURR SENS
REF
Resistor and capacitor values shown are nominal.
IN+ VCC–
IN–
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Peak voltage from VCC+ to VCC– (tw 50 ms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 V
Continuous voltage from VCC+ to VCC– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 V
Input-to-output voltage differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 V
Differential input voltage to error amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5 V
Voltage between noninverting input and VCC– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 V
Current from VZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mA
Current from REF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 mA
Package thermal impedance, θJA (see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86°C/W
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, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
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 TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability.
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


Part Number uA723CN
Description PRECISION VOLTAGE REGULATORS
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