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www.fairchildsemi.com
RC4194
Dual Tracking Voltage Regulators
Features
• Simultaneously adjustable outputs with one resistor
• Internal thermal shutdown at T = +175°C
J
to ±42V
• External balance for ±V unbalancing
OUT
• Load current – ±200 mA with 0.04% load regulation • 3W power dissipations
Description Block Diagram
The RC/RM4194 are dual polarity tracking regulators
4194
designed to provide balanced or unbalanced positive and
+V +V
OUT S
negative output voltages at currents to 200 mA.
A
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PRODUCT SPECIFICATION RC4194 Pin Assignments +V +V -V (Case) +V OUT 1 14 S S S 2 NC NC 13 +V OUT GND 3 12 GND Comp+ 5 6 4 Bal 4 11 R SET Comp+ 7 R 3 SET 2 8 5 10 R Comp- O 9 1 Bal R O 9 NC NC 6 -V S 8 -V 7 OUT Comp- -V OUT 65-4194-03 65-4194-02 Absolute Maximum Ratings 1 (beyond which the device may be damaged) 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
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RC4194 PRODUCT SPECIFICATION Operating Conditions Parameter Min Typ Max Units q Thermal Resistance CerDIP 60 °C/W JC TO-66 Metal Can 7 °C/W q Thermal Resistance PDIP 160 °C/W JA CerDIP 120 °C/W TO-66 Metal Can 42 °C/W Electrical Characteristics (±5 £ V £ V ; –V £ -8V; I = ±1mA; RM4194: -55°C £ T £ +125°C; RC4194: 0°C £ T £ +70°C OUT MAX IN L j j unless otherwise specified) Parameters Test Conditions Min Typ Max Units Line Regulation DV = 0.1 V 0.04 0.1 %V S IN OUT 1 Load Regulation 4194K: I <
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PRODUCT SPECIFICATION RC4194 Typical Performance Characteristics 150 0.06 130 0.05 0.04 110 T = +125¡C j 0.03 90 V = ±15V OUT 0.02 70 T = +25¡C j 50 0.01 30 0 10 -0.01 0 100 1K 10K 100K 0 20 40 60 80 100 120 140 160 180 200 F (Hz) I (mA) L Figure 1. Ripple Rejection vs. Frequency Figure 2. Load Regulation vs. Load Current 0.8 0.6 0.4 0.2 0 A -0.2 B -0.4 C -0.6 -60 -40 -20 0 +20 +40 +60 +80+100+120+140 T (¡C) j A = % Tracking of V OUT B = T.C. for Positive Regulator C = T.C. for Negative Regulato
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RC4194 PRODUCT SPECIFICATION Typical Applications +V OUT 0.01µF To Additional Comparators 4.7µF** +V S Comp+ +V OUT R A +V S RM4194 (Typically 15 RC4805s) 4805 Bal -V S -V S R B -V = -5V R Comp- Gnd R -V OUT SET 0 OUT To Additional 71.5K Comparators R 0 4.7µF R (k½ ) = 2.5 (-V ) O OUT Adjust R for -V = -5V (12.5 k ) W OUT 0.01µF O R = R = 20 k½ (See Schematic) F1 F2 R R F1 A + V = -V OUT 65-0205 OUT R R F2 B R = when
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PRODUCT SPECIFICATION RC4194 Typical Applications (continued) +V = +15V OUT To Additional Op Amps 0.001µF 4.7µF** +V S Comp+ +V OUT +V S 4194 741 (Typically 180 741s) -V S -V S -V = -15V -V R Gnd R OUT OUT SET Comp- 0 To Additional 71.5K Op Amps R 0 4.7µF 0.001µF 65-0204 R (k½) = 2.5 V O OUT Figure 6. Balanced Output Voltage — Op Amp Application +V = +25V S 2 0.01µF In 6 Out REF-02 V = 4 I R1 O R2 OUT Gnd 250 75 4 0.001 -V S Comp + +V S 6 +V (0 to +19.92V) +V
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RC4194 PRODUCT SPECIFICATION RC4194 Switchable Power Supply Compensation The outputs of the RC4194 can be simultaneously switched For most applications, the following compensation technique on or off under logic control as shown in Figure 8. In the is sufficient. The positive regulator section of the RC4194 is “off” state, the outputs will be forced to a minimum voltage, compensated by a 0.001 mF ceramic disc capacitor from the or about ±20 mV, rather than becoming open-circuit. The Comp+
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PRODUCT SPECIFICATION RC4194 All compensation and bypass caps should have short leads, solid grounds, and be located as close to the 4194 as possi- 0.001µF ble. Refer to Figure 9 for recommended compensation cir- cuitry. Comp+ +V +V +V +V S S OUT OUT 0.01µF Protection 4194 –V –V –V –V In systems using monolithic voltage regulators, a number of S S OUT OUT R R Comp- conditions can exist which, left uncorrected, will destroy the 0 SET regulator. Fortunately, regulators can easily be protected *
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RC4194 PRODUCT SPECIFICATION If a small signal silicon diode is used, it will clamp the nega- Let’s look at an application where a user is trying to deter- tive output voltage at about +0.55V. A Schottky barrier or mine whether the RC4194 in a high temperature environ- germanium device would clamp the voltage at about +0.3V. ment will need a heatsink. Another cure which will keep the negative output negative at all times is the 1 mW resistor connected between the +15V Given: output and the Co
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PRODUCT SPECIFICATION RC4194 In the above example, let’s say that the user’s load current is Given q = 7.15°C/W for the 4194 in the K package, J-C 200 mA and he wants to calculate the combined q and C-S q he needs: q + q = 11.75°C/W – 7.15°C/W S-A C-S S-A Given: I = 200 mA, = 4.6°C/W O T – T J A q = -------------------------------------------------------------------------- - When using heatsink compound with a metal-to-metal JA – () V – V ´ I + V ´ I IN OUT O IN Q interface,
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RC4194 PRODUCT SPECIFICATION Simplified Schematic Diagram 11 Comp+ (7) +V s (5) Q30 Q28 Q38 Q40 Q32 Q41 Q35 R19 3000 Q42 Q36 Q33 R20 Q36 R21 200 -V 1.1 OUT (6) Q29 R23 RF1 20K (8) Q34 Q37 Bal R18 R24 10K 20K RF2 Q47 Q44 Q31 (4) R4 R5 R8 Q1 Gnd 500 25K 5000 Q16 Q20 Q3 Q7 R9 15K Q10 Q21 Q17 Q9 Q45 Q13 Q4 (1) Q11 Q25 -V OUT Q2 C1 Q26 Q12 10 pF R1 Q27 R6 12K 8 k W 30K Q6 Q8 Q19 Q24 Q46 Q23 200W Q5 Q22 Q18 Q43 R14 R3 R15 R7 R11 R10 W 3000 W 5000 1.1 R2 5000 3900 1650 680 65-0198 (3) (2) -V (
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PRODUCT SPECIFICATION RC4194 Mechanical Dimensions 9-Lead Metal Can IC Header Package øD Inches Millimeters Symbol Notes Min. Max. Min. Max. øD1 A .250 .340 6.35 8.64 øb .028 .034 .71 .86 1 øD — .620 — 15.75 F A øD1 .470 .500 11.94 12.70 e .190 .210 4.83 5.33 e1 .093 .107 2.36 2.72 F .050 .075 1.27 1.91 .360 — 9.14 — øp .142 .152 3.61 3.86 q .958 .962 24.33 24.43 r1 — .350 — 8.89 øb r2 — .145 — 3.68 S .570 .590 14.48 14.99 S Notes: 1. All leads—increase maximum limit by .003 (.08mm) when lead f
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RC4194 PRODUCT SPECIFICATION Mechanical Dimensions (continued) 14-Lead Ceramic DIP Package Notes: Inches Millimeters Symbol Notes 1. Index area: a notch or a pin one identification mark shall be located Min. Max. Min. Max. adjacent to pin one. The manufacturer's identification shall not be A — .200 — 5.08 used as pin one identification mark. b1 .014 .023 .36 .58 8 2. The minimum limit for dimension "b2" may be .023 (.58mm) for leads number 1, 7, 8 and 14 only. b2 .045 .065 1.14 1.65 2 3. Dim
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PRODUCT SPECIFICATION RC4194 Mechanical Dimensions (continued) 14-Lead Plastic DIP Package Notes: Inches Millimeters Symbol Notes 1. Dimensioning and tolerancing per ANSI Y14.5M-1982. Min. Max. Min. Max. 2. "D" and "E1" do not include mold flashing. Mold flash or protrusions A — .210 — 5.33 shall not exceed .010 inch (0.25mm). A1 .015 — .38 — 3. Terminal numbers are shown for reference only. A2 .115 .195 2.93 4.95 4. "C" dimension does not include solder finish thickness. B .014 .022 .36 .56
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PRODUCT SPECIFICATION RC4194 Ordering Information 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 Note: 1. /883B suffix denotes MIL-STD-883, Par. 1.2.1 compliant device. LIFE
