LT1084 Linear Technology Corporation, LT1084 Datasheet
LT1084
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LT1084 Summary of contents
Page 1
... Current limit is also trimmed, minimizing the stress on both the regulator and power source circuitry under overload conditions. The LT1083/LT1084/LT1085 devices are pin compatible with older three-terminal regulators. A 10μF output ca- pacitor is required on these new devices. However, this is included in most regulator designs. ...
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... OUT LT1084CT ADJ LT1084IT LT1085CT LT1085IT LT1083CK LT1083MK TAB LT1084CK IS OUTPUT LT1084MK LT1085CK LT1085MK *WITH PACKAGE SOLDERED TO 0.5IN OVER BACKSIDE GROUND PLANE OR INTERNAL POWER PLANE. θ JA DEPENDING ON MOUNTING TECHNIQUE. The ● denotes the specifications which apply over the full operating = 25°C. ...
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... Note that the 60W power dissipation for the LT1083 (45W for the LT1084 (K, P), 30W for the LT1084 (T), 30W for the LT1085) is only achievable over a limited range of input-to-output voltage. ...
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... INPUT/OUTPUT DIFFERENTIAL (V) LT1083/4/5 ADJ G08 LT1083 Load Regulation 0.10 ΔI = 7.5A 0.05 0 –0.05 –0.10 –0.15 –0. –50 – TEMPERATURE (°C) LT1084 Load Regulation 0.10 Δ 0.05 0 –0.05 –0.10 –0.15 –0. –50 – TEMPERATURE (°C) LT1085 Load Regulation 0.10 Δ 0.05 0 –0.05 – ...
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... CASE TEMPERATURE (° LIMITED BY MAXIMUM JUNCTION TEMPERATURE LT1083/4/5 ADJ G15 LT1084 Maximum Power Dissipation LT1084MK 40 30 LT1084CT LT1084CP 20 10 LT1084CK 100 110 120 130 140 150 50 CASE TEMPERATURE (° LIMITED BY MAXIMUM JUNCTION TEMPERATURE LT1083/4/5 ADJ G18 ...
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... IN –0 10μF TANTALUM OUT –0 10V 4 OUT V = 13V IN 2 PRELOAD=100mA 0 100 0 50 TIME (μs) 1083/4/5 ADJ G23 LT1084 Line Transient Response ADJ C = 1μF ADJ 20 0 –20 – 10V OUT – 0. 1μF TANTALUM ...
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... Without bypassing the adjustment terminal, smaller ca- pacitors can be used with equally good results and the table below shows approximately what size capacitors are needed to ensure stability. Recommended Capacitor Values INPUT 10μF 10μF LT1083/LT1084/LT1085 + – V OUT 1083/4/5 ADJ BD OUTPUT ADJUSTMENT 10μF Tantalum, 50μF Aluminum None 22μ ...
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... LT1083/LT1084/LT1085 U U APPLICATIONS INFORMATION Normally, capacitor values on the order of 100μF are used in the output of many regulators to ensure good transient response with heavy load current changes. Output capaci- tance can be increased without limit and larger values of output capacitor further improve stability and transient response of the LT1083 regulators ...
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... For example, REF ⎛ × R ⎜ P ⎝ *CONNECT R1 TO CASE CONNECT R2 TO LOAD Figure 2. Connections for Best Load Regulation LT1083/LT1084/LT1085 IN OUT LT1083 V OUT ADJ V R1 REF I ADJ 50μ ...
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... LT1083/LT1084/LT1085 U U APPLICATIONS INFORMATION Connected as shown not multiplied by the divider P ratio about 0.004Ω per foot using 16-gauge wire. P This translates to 4mV/ load current important to keep the positive lead between regulator and load as short as possible and use large wire or PC board traces ...
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... NC 100pF 15V 2N3904 8 –15V 3 – LT1011 10k LM301A 1 – 7 15K 4 15V –15V 15V 1μF LT1083/LT1084/LT1085 LT1083 OUT OUT + ADJ 750Ω* 1.5k 2k OUTPUT ADJUST LT1004-1.2 16k* 2.7k –15V 3 2 11k* LT1083/4/5 ADJ TA05 0V TO 35V OA TO 7.5A 100μF 108345ff 11 ...
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... LT1083/LT1084/LT1085 U TYPICAL APPLICATIONS *C1 IMPROVES RIPPLE REJECTION. SHOULD BE < RIPPLE FREQUENCY LT1083 IN ADJ + 10μF RETURN 12 Paralleling Regulators 2 FEET #18 WIRE* IN LT1083 OUT ADJ 0.015Ω IN LT1083 OUT *THE #18 WIRE ACTS ADJ AS BALLAST RESISTANCE R1 INSURING CURRENT SHARING 120Ω ...
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... R1 5V Regulator with Shutdown* V LT1083 OUT IN IN 121Ω ADJ + 1% 10μF 1k 365Ω 2N3904 TTL 1% 1k *OUTPUT SHUTS DOWN TO 1.3V LT1083/LT1084/LT1085 OUT V OUT 240Ω 2k 1083/4/5 ADJ TA06 † V OUT C2 100μF 1083/4/5 ADJ TA08 V OUT 5V + 100μF 1083/4/5 ADJ TA09 ...
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... LT1083/LT1084/LT1085 PACKAGE DESCRIPTION .760 – .775 .320 – .350 (19.30 – 19.69) (8.13 – 8.89) .420 – .480 (10.67 – 12.19) .060 .256 (1.524) (6.502) .060 .183 (1.524) (4.648) .075 (1.905) .300 (7.620) BOTTOM VIEW OF DD PAK HATCHED AREA IS SOLDER PLATED COPPER HEAT SINK RECOMMENDED SOLDER PAD LAYOUT ...
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... TYP (0.711 – 0.965) LT1083/LT1084/LT1085 .187 – .207 (4.75 – 5.26) .060 – .080 MOUNTING HOLE 18° – 22° (1.52 – 2.03) .115 – .145 (2.92 – 3.68) DIA .170 – ...
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... LT1083/LT1084/LT1085 U TYPICAL APPLICATIONS RELATED PARTS PART NUMBER DESCRIPTION LT1086 1.5A Low Dropout Regulator LT1117 800mA Low Dropout Regulator LT1584/LT1585/LT1587 7A/4.6A/3A Fast Response Low Dropout Regulators LT1580 7A Very Low Dropout Linear Regulator LT1581 10A Very Low Dropout Linear Regulator LT1430 High Power Step-Down Switching Regulator ...