DESCRIPTION The µa723/µa723c is a monolithic precision voltage regulator capable of operation in positive or negative supplies as a series, shunt, switching, or floating regulator. The 723 contains a temperature-compensated reference amplifier, error amplifier, series pass transistor, and current limiter, with access to remote shutdown. FEATURES Positive or negative supply operation Series, shunt, switching, or floating operation.1% line and load regulation Output voltage adjustable from 2V to 37V Output current to 15mA without external pass transistor µa723 MIL-STD-883A, B, C available PIN CONFIGURATION D,F, N Packages NC CURRENT LIMIT CURRENT SENSE ERTING INPUT NON-ERTING INPUT REF V 1 2 3 4 5 6 7 14 13 12 11 1 9 8 NC FREQUENCY COMPENS. C OUT Z NC SL53 Figure 1. Pin Configuration ORDERING INFORMATION DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG # 14-Pin Ceramic Dual In-Line Package (CERDIP) -55 C to 125 C µa723f 581B 14-Pin Plastic Dual In-Line Package (DIP) to 7 C µa723cn SOT27-1 14-Pin Plastic Small Outline (SO) Package to 7 C µa723cd SOT18-1 EQUIVALENT CIRCUIT FREQUENCY COMPENSATION 12 13 11 TEMPERATURE COMPENSATED ZENER 8 ERTING INPUT 4 ERROR AMP NON ERTING INPUT + SERIES PASS TRANSISTOR 1 VOLTAGE REFERENCE AMPLIFIER 7 V 2 3 CURRENT CURRENT SENSE LIMIT 9 V Z SL54 Figure 2. Equivalent Circuit 1994 Aug 31 1 853-163 13721
ABSOLUTE MAXIMUM RATINGS SYMBOL PARAMETER RATING UNIT Pulse voltage from to V- (5ms) 5 V Continuous voltage from to V- 4 V Input-output voltage differential 4 V V DIFF Error amplifier maximum input differential voltage ±5 V M Error amplifier non-inverting input (Pin 5) to -V (Pin 7) 8 V I OUT Maximum output current 15 ma Current from 15 ma Current from V Z 25 ma P MAX Maximum power dissipation T A =25 C (still-air) 1 T A F package 119 mw N package 142 mw D package 14 mw Operating ambient temperature range µa723 µa723c -55 to +125 to 7 T STG Storage temperature range -65 to +15 C T SOLD Lead soldering temperature (1sec max) 3 C 1. The following derating factors should be applied above 25 C F package at 9.5mW/ C N package at 11.4mW/ C D package at 8.3mW/ C C C 1994 Aug 31 2
DC ELECTRICAL CHARACTERISTI T A =25 C, unless otherwise specified. 1 SYMBOL PARAMETER TEST CONDITIONS µa723 µa723c Min Typ Max Min Typ Max =12V to =15V.1.1.1.1 V R LINE Line regulation 2 =12V to =4V.2.2.1.5 UNITS % V R LOAD Load regulation 2 I L =1mA to I L =5mA.3.15.3.2 % f=5hz to 1kHz, C REF = 74 74 VIN/ VO Ripple Rejection db f=5hz to 1kHz, C REF =5µF 86 86 I OS Short-circuit current =1Ω, = 65 65 ma Reference voltage I REF =.1mA 6.95 7.15 7.35 6.8 7.15 7.5 V (LOAD) V NOISE Reference voltage change with load Output noise voltage S Long-term stability Tj=Tjmax. I REF =.1mA to 5mA 2 2 mv BW=1Hz to 1kHz, C REF = 2 2 BW=1Hz to 1kHz, C REF =5µF 2.5 2.5 TA=25 C for end point measurment µv RMS.1.1 %1 hrs. I SCD Standby current drain I L =, =3V 2.3 3.5 2.3 4. ma Input voltage range 9.5 4 9.5 4 V Output voltage range 2. 37 2. 37 V V DIFF Input-output voltage differential The following specifications apply over the operating temperature ranges. 3. 38 3. 38 V V R LINE Line regulation =12V to =15V.3.3 % V R LOAD Load regulation I L =1mA to I L =5mA.6.6 % TC Average temperature coefficient of output voltage.2.15.3.15 %/ C 1. == =12V, V-=V, =5V, I L =1mA, =, =1pF, C REF = and divider impedance as seen by error amplifier 1kΩ. 2. The load and line regulation specifications are for constant junction temperature. Temperature drift effects must be taken into account separately when the unit is operating under conditions of high dissipation. 1994 Aug 31 3
TYPICAL PERFORMANCE CHARACTERISTI STANDBY CURRENT Standby Current Drain as a Function of Input Voltage 5. 4. 3. 2. 1. T A = 55 C T A = C = I L = T A = +7 C I LMAX ma 2 16 12 8 4 Maximum Load Current as a Function of Input-Output Voltage Differential T JMAX = 15 C R TH = 15 C/W P STANDBY = 6mW METAL CAN PACKAGE (NO HEAT SINK) T A = 7 C REGULATION % +.1.1.2.3 Load Regulation Characteristics with = 5V, = +12V = 1Ω T A = 55 C T A = +7 C T A = C 1 2 3 4 5 INPUT VOLTAGE V 1 2 3 4 5 ( ) V.4 2 4 6 8 1 CURRENT ma CURRENT LIMIT SENSE VOLTAGE V.8.7.6.5.4.3 Characteristics as a Function of Junction Temperature SENSE VOLTAGE LIMIT CURRENT = 1Ω LIMIT CURRENT = 5Ω 5 +5 +1 +15 JUNCTION TEMPERATURE C 2 16 12 8 4 LIMITING CURRENT ma I LMAX ma 2 16 12 8 4 Maximum Load Current as a Function of Input-Output Voltage Differential T JMAX = 15 C R TH = 111 C/W P STANDBY = 6mW DIP PACKAGE (NO HEAT SINK) T A = 7 C 1 2 3 4 5 ( ) V REGULATION % +.5.5.1.15.2 Load Regulation Characteristics Without T A = 7 C T 2 A = C 4 T A = +55 C CURRENT ma = 5V V R IN = +12V SC = 6 8 1 Load Transient Response Line Regulation as a Function of Input-Output Voltage Differential Output Impedance as a Function of Frequency VOLTAGE DEVIATION mv LOAD CURRENT +1 VOLTAGE 4. = 5V 4. V I IN = +12V L = 4mA = 8. TIME µs LOAD DEVIATION ma REGULATION % +.3 +.2 +.1.1 = +5V = = +3V I IL = 1mA.2 ( ) V IMPEDANCE Ω 1 1..1 V O = +5V = +12V = I IL = 5mA.1 1 1k 1k 1k 1M FREQUENCY Hz = = 1µF SL55 Figure 3. Typical Performance Characteristics 1994 Aug 31 4
TYPICAL PERFORMANCE CHARACTERISTI (Continued) VOLTAGE DEVIATION mv 2. Line Transient Response INPUT VOLTAGE VOLTAGE 4. 2. 4. 6. TIME µs INPUT VOLTAGE DEVIATION VOLTS REGULATION % Load Regulation as a Function of Input-Output Voltage Differential +.2 +.1.1.2 V O = +5V = +12V = I IL = ma TO I L = 5mA.3 ( ) V Figure 4. Typical Performance Characteristics (cont.) VOLTAGE DEVIATION V 1.2 1..8.6.4.2 Characteristics T A = +7 C T A = C T A = 55 C V O = +5V = +12V = 1Ω 2 4 6 8 1 CURRENT ma SL56 TYPICAL APPLICATIONS R 5 V Z T 1 C REF V COMP 1pF COMP 1pF VREF x NOTE: 2 x ; R3 for minimum temperature drift Low Voltage Regulator ( = 2 to 7V) Figure 5. Typical Applications Negative Voltage Regulator SL57 1994 Aug 31 5
TYPICAL APPLICATIONS (Continued) V COMP 2kΩ 1nF Q 1 2kΩ LOGIC INPUT V COMP 1pF NOTE: VREF x NOTE: VREF x ; R3 for minimum temperature drift R3 may be eliminated for minimum component count Remote Shutdown Regulator With Current Limiting ( = 2 to 7V) High Voltage Regulator ( = 7 to 37V) V I KNEE R V OUT 1 VREF X I SHORT CKT V SENSE V Z COMP 1nF V (R SENSE 3 ) R 4 X VOLTAGE DEVIATION V 16 14 12 1 8 6 4 2 = 3.4Ω = 3.6kΩ = 5Ω I SHORT CURRENT ma I SC V SENSE (I KNEE I SHORT CKT ) V SENSE I SC 1 I KNEE 1 2 3 4 5 6 1 Foldback Regulator ( = 2 to 7V) SL58 Figure 6. Typical Applications (cont.) 1994 Aug 31 6