RC4194 FAIRCHILD | Alldatasheet

Document overview

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Technical content

Features

  • Simultaneously adjustable outputs with one resistor to ±42V
  • Load current – ±200 mA with 0.04% load regulation

Description

The RC/RM4194 are dual polarity tracking regulators designed to provide balanced or unbalanced positive and negative output voltages at currents to 200 mA. A single external resistor adjustment can be used to change both outputs between the limits of ±50 mV and ±42V . These devices are designed for local “on-card” regulation, eliminating distribution problems associated with single- point regulation. To simplify application the regulators require a minimum number of external parts. The device is available in three package types to accommo- date various power requirements. The K (TO-66) power package can dissipate up to 3W at T A = +25°C. The D 14-pin dual in-line will dissipate up to 1W and the N 14-pin dual in-line will dissipate up to 625 mW.

  • Internal thermal shutdown at T J = +175°C
  • External balance for ±V OUT unbalancing
  • 3W power dissipations Block Diagram Comp+ Bal +V S –VS –VOUT +V OUT GND R SET R O 65-4194-01 Thermal Shutdown 100µA Current Source Comp– 20K 4194 20K 3R R RC4194 Dual Tracking Voltage Regulators Rev. 1.0.0

PRODUCT SPECIFICATION RC4194 Absolute Maximum Ratings (beyond which the device may be damaged)1 Note: 1. Functional operation under any of these conditions is NOT implied. Parameter Min Typ Max Units Supply Voltage RC4194 ±35 V RM4194 ±45 V Supply Input to Output Voltage Differential RC4194 ±35 V RM4194 ±45 V Load Current PDIP 100 mA CerDIP 150 mA TO-66 Metal Can 250 mA P D TA < 50°C PDIP 468 mW CerDIP 1042 mW TO-66 Metal Can 2381 mW Operating Temperature (T j) RC4194 0 70 °C RM4194 -55 125 °C Storage Temperature -65 150 °C Junction Temperature PDIP 125 °C CerDIP 175 °C TO-66 Metal Can 150 °C Lead Soldering Temperature (60 seconds) 300 °C For TA > 50°C Derate at TO-66 Metal Can 23.81 mW/ °C PDIP 6.25 mW/ °C CerDIP 8.38 mW/ °C Pin Assignments 65-4194-02 456 GND R R -VOUTComp- Bal Comp+ +V OUT -V (Case) S SET O S 1 7 8 NC Comp+ Bal Comp- NC S OUT NC GND R R NC -VOUT S SET O 65-4194-03

RC4194 PRODUCT SPECIFICATION Operating Conditions

Electrical Characteristics

(±5 £ VOUT £ VMAX ; –VIN £ -8V; IL = ±1mA; RM4194: -55°C £ Tj £ +125°C; RC4194: 0°C £ Tj £ +70°C unless otherwise specified) Notes: 1. Measured as (mA) 2. Output voltage temperature drift guaranteed by design. 3. The current drain will increase by 50mA/VOUT on positive side and 100mA/VOUT on negative side. 4. The specifications above apply for the given junction temperatures since pulse test conditions are used. Parameter Min Typ Max Units qJC Thermal Resistance CerDIP 60 °C/W TO-66 Metal Can 7 °C/W qJA Thermal Resistance PDIP 160 °C/W CerDIP 120 °C/W TO-66 Metal Can 42 °C/W Parameters Test Conditions Min Typ Max Units Line Regulation DVS = 0.1 VIN 0.04 0.1 %V OUT Load Regulation1 4194K: IL < 200 mA 4194D: IL < 100 mA ±VS = ± (VOUT + 5)V 0.002 0.004 %V OUT /IL (mA) Output Voltage Drift With Temperature2 Positive Output V OUT = ±5V 0.002 0.015 %/ °C Negative Output V OUT = ±5V 0.003 0.015 %/ °C Supply Current3 (Positive) V S = ±VMAX , VOUT = 0V, IL = 0 mA +0.8 +2.5 mA Supply Current4 (Negative) V S = ±VMAX , VOUT = 0V, IL = 0 mA -1.8 -4.0 mA Supply Voltage RM4194 ±9.5 ±45 V RC4194 ±9.5 ±35 V Output Voltage Scale Factor R SET = 71.5 kW, Tj = +25°C, VS = ±VMAX 2.38 2.5 2.62 k W/V Output Voltage Range RM4194: R SET = 71.5 kW, IL = 25 mA 0.05 ±42 V RC4194: RSET = 71.5 kW, IL = 25 mA 0.05 ±42 V Output Voltage Tracking ±0.4 ±2.0 % Ripple Rejection F = 120 Hz, T j = +25°C7 0 d B Input-Output Voltage Differential IL = 50 mA, Tj = +25°C 3.0 V Short Circuit Current V S = ±30V, Tj = +25°C 300 mA Output Noise Voltage C L = 4.7 mF, VOUT = ±15V, F = 10 Hz to 100 kHz 250 mVRMS Internal Thermal Shutdown 175 °C DV OUT V OUT æö IL§

Figure 4. Unbalanced Output Voltage — Comparator Application Figure 5. High Output Application **Optional usage - Not as critical as -V bypass capacitors.

0 OUT

Figure 6. Balanced Output Voltage — Op Amp Application Figure 7. Digitally Controlled Dual 200 mA Voltage Regulator

9 Case 4

pin to ground with an analog switch. shown in the alternate switch configuration. but if in doubt, be sure to include them. Figure 8. ±12V Switchable Power Supply

RC4194 PRODUCT SPECIFICATION If a small signal silicon diode is used, it will clamp the nega- tive output voltage at about +0.55V . A Schottky barrier or germanium device would clamp the voltage at about +0.3V . Another cure which will keep the negative output negative at all times is the 1 mW resistor connected between the +15V output and the Comp- terminal. This resistor will then sup- ply drive to the negative output transistor, causing it to satu- rate to -1V during the brownout. Heatsinking V oltage Regulators are power devices which are used in a wide range of applications. When operating these devices near their extremes of load current, ambient temperature and input-output differential, consideration of package dissipation becomes important to avoid thermal shutdown at 175°C. The RC4194 has this fea- ture to prevent damage to the device. It typically starts affecting load regulation approximately 2°C below 175°C. To avoid shutdown, some form of heatsinking should be used or one of the above operating conditions would need to be derated.* The following is the basic equation for junction temperature: Equation 1 where T J = junction temperature (°C) TA = ambient air temperature (°C) PD = power dissipated by device (W) qJ-A = thermal resistance from junction to ambient air (°C/W) The power dissipated by the voltage regulator can be detailed as follows: Equation 2 where V IN = input voltage V OUT = regulated output voltage IO = load current IQ = quiescent current drain T J T A PD qJA–+= PD V IN V OUT–() IO V IN IQ´+´= Let’s look at an application where a user is trying to deter- mine whether the RC4194 in a high temperature environ- ment will need a heatsink. Given: T J at thermal shutdown = 150°C TA = 125°C qJ-A = 41.6°C/W, K (TO-66) pkg. V IN = 40V V OUT = 30V IQ = 1 mA + 75 mA/V OUT x 30V = 3.25 mA* Solve for IO , = 60 mA – 13 mA ~ 47 mA If this supply current does not provide at least a 10% margin under worst case load conditions, heatsinking should be employed. If reliability is of prime importance, the multiple regulator approach should be considered. In Equation 1, q J-A can be broken into the following compo- nents: qJ-A = qJ-C + qC-S + qS-A where qJ-C = junction-to-case thermal resistance qC-S = case-to-heatsink thermal resistance qS-A = heatsink-to-ambient thermal resistance qJA– T J T A– PD PD T J T A– qJA– V IN V OUT–() IO V IN IQ´+´= IO T J T A– V IN IQ´ IO 150°C 125 °C– *The current drain will increase by 50mA/VOUT on positive side and 100mA/VOUT on negative side

Table 1. Commercial Heatsink Selection Guide No attempt has been made to provide a complete list of all heatsink manufacturers. This list is only representative.

  • All values are typical as given by manufacturer or as determined from characteristic curves supplied by manufacturer.

20 Thermalloy — 6007

30 Thermalloy — 6010

32 Thermalloy — 6011

34 Thermalloy — 6012

45 IERC — LI

60 Wakefield — 650, 651

interface, a typical qC-S = 0.5°C/W for the K package. guide to heatsink manufacturers.

RC4194 PRODUCT SPECIFICATION Simplified Schematic Diagram 65-0198 Q28 Q30 Q29 Q33 Q34 Q37 Q36 Q35 Q38 Comp+ (7) R18 10K 500 25K Q47 Q16 Q13 Q11 Q10 Q12C1 10 pF 30K 12K 680 5000 5000 (3) R (2) R R11 3900 R10 1650 Q19 Q22 Q23 Q24 Q17 Q21 Q20 Q44 5000 Q31 Q25 Q26 8 kW 200W R14 3000 W Q46 Q18 Q43 R15 1.1 W Q27 (1) -V OUT 15K Q45 (6) (8) (4) Bal Gnd OUT RF1 RF2 R23 20K R24 20K Q32 Q36 Q42 Q40 Q41 R21 1.1 R19 3000 R20 200 To Case (9) Comp-SET 0 (5) +Vs SNote: Pin numbers are for K package.

PRODUCT SPECIFICATION RC4194 Mechanical Dimensions 9-Lead Metal Can IC Header Package S øb øp F øD1 øD A q e Notes: 1. All leads—increase maximum limit by .003 (.08mm) when lead finish is applied. A .250 .340 6.35 8.64 Symbol Inches Min. Max. Min. Max. Millimeters Notes øb .028 .034 .71 .86 øD — .620 — 15.75 øD1 .470 .500 11.94 12.70 .190 .210 4.83 5.33 .093 .107 2.36 2.72 e F .050 .075 1.27 1.91 .360 — 9.14 — .142 .152 3.61 3.86 .958 .962 24.33 24.43 øp q — .350 — 8.89r1 — .145 — 3.68r2 .570 .590 14.48 14.99S

RC4194 PRODUCT SPECIFICATION Mechanical Dimensions (continued) 14-Lead Ceramic DIP Package A — .200 — 5.08 Symbol Inches Min. Max. Min. Max. Millimeters Notes b1 .014 .023 .36 .58 .065 1.65b2 .045 1.14 c1 .008 .015 .20 .38 E .220 .310 5.59 7.87 e .100 BSC 2.54 BSC L .125 .200 3.18 5.08 .015 .060 .38 1.52 .005 — .13 — 5, 9 eA .300 BSC 7.62 BSC 7 Q 90¡ 105¡ 90¡ 105¡a D — .785 — 19.94 Notes: Index area: a notch or a pin one identification mark shall be located adjacent to pin one. The manufacturer's identification shall not be used as pin one identification mark. The minimum limit for dimension "b2" may be .023 (.58mm) for leads number 1, 7, 8 and 14 only. Dimension "Q" shall be measured from the seating plane to the base plane. This dimension allows for off-center lid, meniscus and glass overrun. The basic pin spacing is .100 (2.54mm) between centerlines. Each pin centerline shall be located within ±.010 (.25mm) of its exact longitudinal position relative to pins 1 and 14. Applies to all four corners (leads number 1, 7, 8, and 14). "eA" shall be measured at the center of the lead bends or at the centerline of the leads when "a" is 90¡. All leads – Increase maximum limit by .003 (.08mm) measured at the center of the flat, when lead finish applied. Twelve spaces. NOTE 1 D E 8 14 7 1 Q A e L eA a

PRODUCT SPECIFICATION RC4194 Mechanical Dimensions (continued) 14-Lead Plastic DIP Package D e B A L 8 14 E eB C A — .210 — 5.33 Symbol Inches Min. Max. Min. Max. Millimeters Notes A1 .015 — .38 — .022 .56B .014 .36 .195 4.95A2 .115 2.93 B1 .045 .070 1.14 1.78 D .725 .795 18.42 20.19 .300 .325 7.62 8.26E eB — .430 — 10.92 .115 .200 2.92 5.08 e .100 BSC 2.54 BSC L 14 14 5N .240 .280 6.10 7.11E1 C .008 .015 .20 .38 D1 .005 — .13 — Notes: Dimensioning and tolerancing per ANSI Y14.5M-1982. "D" and "E1" do not include mold flashing. Mold flash or protrusions shall not exceed .010 inch (0.25mm). Terminal numbers are shown for reference only. "C" dimension does not include solder finish thickness. Symbol "N" is the maximum number of terminals.

PRODUCT SPECIFICATION RC4194 5/20/98 0.0m 001 Stock#DS30004194 Ó 1998 Fairchild Semiconductor Corporation LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com O rdering Information Note: Product Number Temperature Range Screening Package SMD Number RC4194N 0° to +70°C Commercial 14 pin Plastic DIP RC4194D 0° to +70°C Commercial 14 pin Ceramic DIP RC4194K 0° to +70°C Commercial 9 pin TO-66 RM4194D -55°C to +125°C Commercial 14 pin Ceramic DIP RM4194D/883B -55°C to +125°C Military 14 pin Ceramic DIP 7705401CA RM4194K -55°C to +125°C Commercial 9 pin TO-66