LT1085 LINER [Linear Technology], LT1085 Datasheet
LT1085
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LT1085 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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... 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° 10mA 25°C, J – ...
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... Note 3: Line and load regulation are guaranteed up to the maximum power dissapation (60W for the LT1083, 45W for the LT1084 (K, P), 30W for the LT1084 (T) and 30W for the LT1085). Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output voltage range ...
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... TEMPERATURE (°C) LT1084 Load Regulation 0.10 ∆ 0.05 0 –0.05 –0.10 –0.15 –0. –50 – TEMPERATURE (°C) LT1085 Load Regulation 0.10 ∆ 0.05 0 –0.05 –0.10 –0.15 –0.20 35 –50 – TEMPERATURE (°C) 75 100 125 150 LT1083/4/5 ADJ G03 75 100 ...
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... OUT C = 25µF ADJ 25µF OUT OUTPUT CURRENT (A) 1083/4/5 ADJ G17 LT1083/LT1084/LT1085 Adjust Pin Current 100 –50 – 100 125 TEMPERATURE (°C) LT1083/4/5 ADJ G12 LT1083 Maximum Power Dissipation* ...
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... OUT 100 200 TIME (µs) 1083/4/5 ADJ G26 LT1085 Maximum Power Dissipation LT1085MK 30 20 LT1085CT 10 LT1085CK 100 110 120 130 140 150 3.0 CASE TEMPERATURE (° LIMITED BY MAXIMUM JUNCTION TEMPERATURE LT1085 Load Transient Response 0 0.2 ADJ = 1µF 0.1 0 – ...
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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 108345fe 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 0.760 – 0.775 0.320 – 0.350 (19.30 – 19.69) (8.13 – 8.89) 0.420 – 0.480 (10.67 – 12.19) 0.038 – 0.043 (0.965 – 1.09) .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 ...