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LM350 Dataheets PDF



Part Number LM350
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description 3-Terminal 3A Positive Adjustable Voltage Regulator
Datasheet LM350 DatasheetLM350 Datasheet (PDF)

LM350 — 3-Terminal 3 A Positive Adjustable Regulator September 2014 LM350 3-Terminal 3 A Positive Adjustable Regulator Features • Output Adjustable Between 1.2 V and 33 V • Guaranteed 3 A Output Current • Internal Thermal Overload Protection • Load Regulation (Typical: 0.1%) • Line Regulation (Typical: 0.015%/V) • Internal Short-Circuit Current Limit • Output Transistor Safe-Area Compensation Description The LM350 is an adjustable 3-terminal positive voltage regulator capable of supplying in.

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LM350 — 3-Terminal 3 A Positive Adjustable Regulator September 2014 LM350 3-Terminal 3 A Positive Adjustable Regulator Features • Output Adjustable Between 1.2 V and 33 V • Guaranteed 3 A Output Current • Internal Thermal Overload Protection • Load Regulation (Typical: 0.1%) • Line Regulation (Typical: 0.015%/V) • Internal Short-Circuit Current Limit • Output Transistor Safe-Area Compensation Description The LM350 is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of 3.0 A over an output voltage range of 1.2 V to 33 V. TO-220 (Single Gauge) 1 1. Adj 2. Output 3. Input Ordering Information Product Number LM350T Marking LM350 Package Packing Method Operating Temperature TO-220 3L (Single Gauge) Rail 0 to +125°C © 2002 Fairchild Semiconductor Corporation LM350 Rev. 1.1.0 www.fairchildsemi.com LM350 — 3-Terminal 3 A Positive Adjustable Regulator Block Diagram 3 INPUT + VREF _ VOLTAGE REFERENCE PROTECTION CIRCUITRY ADJUSTABLE 1 Figure 1. Block Diagram Q1 Q0 RSC 2 OUTPUT Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted. Symbol Parameter Value Unit VI - VO TLEAD TOPR TSTG Input-Output Voltage Differential Lead Temperature (Soldering, 10 sec) Operating Temperature Range Storage Temperature Range 35 V 300 °C 0 to +125 °C -65 to +150 °C Thermal Characteristics Values are at TA = 25°C unless otherwise noted. Symbol PD Power Dissipation Parameter Value Internally Limited Unit W © 2002 Fairchild Semiconductor Corporation LM350 Rev. 1.1.0 2 www.fairchildsemi.com LM350 — 3-Terminal 3 A Positive Adjustable Regulator Electrical Characteristics VI - VO = 5 V, IO = 1.5 A, 0°C ≤ TJ ≤ +125°C, PD ≤ PDMAX, unless otherwise specified. Symbol Rline Rload IADJ ΔIADJ REGT VREF Rline Rload STT IO(MAX) IL(MIN) VN RR Parameter Line Regulation(1) Load Regulation(1) Adjustment Pin Current Adjustment Pin Current Change Thermal Regulation Reference Voltage Line Regulation Load Regulation Temperature Stability Maximum Output Current Minimum Load Current RMS Noise, %of VOUT Ripple Rejection Conditions TA = +25°C, 3 V ≤ VI - VO ≤ 35 V TA = +25°C, 3 V ≤ VI - VO ≤ 35 V, VO ≤ 5V TA = +25°C, 3 V ≤ VI - VO ≤ 35 V, VO ≥ 5V - 3 V ≤ VI - VO ≤ 35 V, 10 mA ≤ IO ≤ 3 A, PD ≤ PMAX Pulse = 20 ms, TA = +25°C 3 V ≤ VI - VO ≤ 35 V, 10 mA ≤ IO ≤ 3 A, PD ≤ 30 W 3.0 V ≤ VI - VO ≤ 35 V 10 mA ≤ IO ≤ 3.0 A, VO ≤ 5.0 V 10 mA ≤ IO ≤ 3.0 A, VO ≥ 5.0 V TJ = 0°C to +125°C VI - VO ≤ 10 V, PD ≤ PMAX VI - VO = 30 V, PD ≤ PMAX, TA = +25°C VI - VO = 35 V 10 Hz ≤ f ≤ 10 kHz, TA = +25°C VO = 10 V, f = 120 Hz, CADJ = 0 VO = 10 V, f = 120 Hz, CADJ = 10 μF Min. 1.20 3.0 0.25 66 ST Long-Term Stability TJ = +125°C Typ. 0.015 5 0.1 50 0.2 0.002 1.25 0.02 20 0.3 1.0 4.5 1.0 3.5 0.003 65 80 0.3 Max. 0.030 25 Unit %/V mV 0.5 % 100 μA 5.0 μA %/W 1.30 V 0.07 %/W 70 mV 1.5 % % A 10 mA %/Vo dB 1 %/ 1000HR Note: 1. Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. © 2002 Fairchild Semiconductor Corporation LM350 Rev. 1.1.0 3 www.fairchildsemi.com LM350 — 3-Terminal 3 A Positive Adjustable Regulator Typical Performance Characteristics Figure 2. Load Regulation Figure 3. Current Limit Figure 4. Adjustment Pin Current Figure 5. Dropout Voltage Figure 6. Temperature Stability © 2002 Fairchild Semiconductor Corporation LM350 Rev. 1.1.0 Figure 7. Minimum Load Current www.fairchildsemi.com 4 LM350 — 3-Terminal 3 A Positive Adjustable Regulator Typical Performance Characteristics (Continued) Figure 8. Ripple Rejection vs. VO Figure 9. Ripple Rejection vs. IO Figure 10. Ripple Rejection vs Frequency Figure 11. Output Impedan Figure 12. Line Transient Response Figure 13. Load Transient Response © 2002 Fairchild Semiconductor Corporation LM350 Rev. 1.1.0 5 www.fairchildsemi.com LM350 — 3-Terminal 3 A Positive Adjustable Regulator Typical Application(2) Input LM350 IN OUT ADJ I1 IADJ R1 120 CI 0.1uF R2 Output CO 1uF Figure 14. Note: 2. CI: CI is required if the regulator is located an appreciable distance from power supply filter. CO: Output capacitors in the range of 1 μF to 100 μF of aluminum or tantalum electronic are commonly used to provide improved output impedance and rejection of transients. In operation, the LM350 develops a nominal 1.25 V reference voltage, VREF, between the out.


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