LM350T

LM350 3-Amp Adjustable Regulators FEATURES 1 • • • • • • • • 2 • • Adjustable Output Down to 1.2V Guaranteed 3A output Current Guaranteed Thermal Regulation Output is Short Circuit Protected Current Limit Constant with Temperature P+ Product Enhancement Tested 86 dB Ripple Rejection Ensured 1% Output Voltage Tolerance (LM350A) Ensured Max. 0.01%/V Line Regulation (LM350A) Ensured Max. 0.3% Load Regulation (LM350A) In addition to higher performance than fixed regulators, the LM350 series offers full overload protection available only in IC's. Included on the chip are current limit, thermal overload protection and safe area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is accidentally disconnected. Normally, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors in which case an input bypass is needed. An output capacitor can be added to improve transient response, while bypassing the adjustment pin will increase the regulator's ripple rejection. Besides replacing fixed regulators or discrete designs, the LM350 is useful in a wide variety of other applications. Since the regulator is “floating” and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input to output differential is not exceeded, i.e., avoid short-circuiting the output. APPLICATIONS • • • Adjustable Power supplies Constant Current Regulators Battery Chargers By connecting a fixed resistor between the adjustment pin and output, the LM350 can be used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping the adjustment terminal to ground which programs the output to 1.2V where most loads draw little current. DESCRIPTION The LM350 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 3A over a 1.2V to 33V output range. They are exceptionally easy to use and require only 2 external resistors to set the output voltage. Further, both line and load regulation are comparable to discrete designs. Also, the LM350 is packaged in standard transistor packages which are easily mounted and handled. Connection Diagram Case is Output Figure 1. (TO-3 STEEL) Metal Can Package Bottom View http://www.hgsemi.com.cn Figure 2. (TO-220) Plastic Package Front View 1 2019 NOV LM350 Absolute Maximum Ratings Power Dissipation Internally Limited Input-Output Voltage Differential +35V −65°C to +150°C Storage Temperature Lead Temperature Metal Package (Soldering, 10 sec.) 300°C Plastic Package (Soldering, 4 sec.) 260°C ESD Tolerance TBD −40°C ≤ TJ ≤ +125°C LM350A Operating Temperature Range LM350 0°C ≤ TJ ≤ +125°C Electrical Characteristics Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN − VOUT = 5V, and IOUT = 10 mA. Parameter LM350A Conditions Reference Voltage IOUT = 10 mA, TJ = 25°C 3V ≤ (VIN − VOUT) ≤ 35V, 10 mA ≤ IOUT ≤ 3A, P ≤ 30W Line Regulation 3V ≤ (VIN − VOUT) ≤ 35V Load Regulation 10 mA ≤ IOUT ≤ 3A Thermal Regulation 20 ms Pulse Typ Max 1.238 1.250 1.262 1.225 1.250 1.270 0.005 0.02 Adjustment Pin Current Adjustment Pin Current Change 10 mA ≤ IOUT ≤ 3A, 3V ≤ (VIN − VOUT) ≤ 35V 0.005 0.03 %/V 0.05 0.02 0.07 %/V 0.1 0.3 0.1 0.5 % 0.3 1 0.3 1.5 % 0.002 0.01 0.002 0.03 %/W 50 100 50 100 μA 0.2 5 0.2 5 μA 10 3.5 10 mA 1 3.5 1.20 1 % VIN − VOUT ≤ 10V 3.0 4.5 3.0 4.5 VIN − VOUT = 30V 0.3 1 0.25 1 A 0.001 % 10 Hz ≤ f ≤ 10 kHz 0.001 VOUT = 10V, f = 120 Hz, CADJ = 0 μF VOUT = 10V, f = 120 Hz, CADJ = 10 μF TJ = 125°C, 1000 hrs Thermal Resistance, Junction to NDS Package Case NDE Package Thermal Resistance, Junction to NDS Package Ambient (No Heat Sink) NDE Package http://www.hgsemi.com.cn V 0.01 TMIN ≤ TJ ≤ TMAX Long-Term Stability Units Max V VIN − VOUT = 35V Ripple Rejection Ratio Typ 1.30 Temperature Stability RMS Output Noise, % of VOUT Min 1.25 Minimum Load Current Current Limit LM350 Min 65 66 86 0.25 1 3 4 50 2 66 A 65 dB 86 dB 0.25 1 % 1.2 1.5 °C/W 3 4 °C/W 35 °C/W 50 °C/W 2019 NOV LM350 Important statement: Huaguan Semiconductor Co,Ltd. reserves the right to change the products and services provided without notice. Customers should obtain the latest relevant information before ordering, and verify the timeliness and accuracy of this information. Customers are responsible for complying with safety standards and taking safety measures when using our products for system design and machine manufacturing to avoid potential risks that may result in personal injury or property damage. Our products are not licensed for applications in life support, military, aerospace, etc., so we do not bear the consequences of the application of these products in these fields. Our documentation is only permitted to be copied without any tampering with the content, so we do not accept any responsibility or liability for the altered documents. http://www.hgsemi.com.cn 3 2019 NOV