LM317MDTG

Part: LM317M / LM317MA / LM317MB (also NCV317MAB / NCV317MB automotive) — onsemi

Type: Adjustable Positive Linear Voltage Regulator (3-terminal)

Description: Adjustable positive linear regulator supplying more than 500 mA over a 1.2–37 V output range, with internal current limiting, thermal shutdown and safe-area compensation.

Operating Conditions:

• Input-output differential: up to 40 V (3.0 V ≤ VI − VO ≤ 40 V in the electrical characteristics)
• Operating junction temperature: 0 to +125 °C (LM317M, LM317MA); −40 to +125 °C (LM317MB, LM317MAB, NCV parts) — grade-dependent
• Output voltage range: 1.2 V to 37 V
• Minimum load current: 3.5 mA typ, 10 mA max (VI − VO = 40 V)

Absolute Maximum Ratings:

• Input-output voltage differential: 40 Vdc
• Max junction temperature: +150 °C
• Storage temperature: −65 to +150 °C
• Power dissipation: internally limited (TA = 25 °C)

Key Specs:

• Reference voltage: 1.25 V typ (1.20–1.30 V for LM317M/MB; 1.225–1.275 V for MA/MAB)
• Line regulation: 0.01 %/V typ, 0.04 %/V max (TA = 25 °C, 3.0 V ≤ VI − VO ≤ 40 V)
• Load regulation (10 mA ≤ IO ≤ 0.5 A, TA = 25 °C): 5.0 mV typ / 25 mV max for VO ≤ 5 V; 0.1 %VO typ / 0.5 %VO max for VO ≥ 5 V
• Adjustment pin current: 50 μA typ, 100 μA max
• Maximum output current: 0.5 A min (VI − VO ≤ 15 V); 0.15 A min (VI − VO = 40 V, TA = 25 °C)
• Ripple rejection (VO = 10 V, 120 Hz): 65 dB typ without CAdj; 80 dB typ with CAdj = 10 μF
• RMS noise: 0.003 %VO typ (10 Hz–10 kHz)
• Thermal shutdown: 180 °C typ
• Long-term stability: 0.3 %/1.0 kHrs typ, 1.0 max

Features:

• Output current in excess of 500 mA
• Output adjustable between 1.2 V and 37 V
• Internal thermal overload protection
• Internal short-circuit current limiting
• Output transistor safe-area compensation
• Floating operation for high-voltage applications
• Pb-free devices
• NCV prefix: AEC-Q100 qualified and PPAP capable

Applications:

• Local on-card regulation
• Adjustable switching regulator
• Programmable output regulator
• Precision current regulator

Package:

• TO-220AB (T suffix, Case 221AB)
• DPAK (DT suffix, Case 369C)
• SOT-223 (ST suffix, Case 318E)

• Output Current in Excess of 500 mA

• Internal Thermal Overload Protection

• Output Adjustable between 1.2 V and 37 V

• Internal Short Circuit Current Limiting

• Floating Operation for High Voltage Applications

• Output Transistor Safe -Area Compensation

• Eliminates Stocking Many Fixed Voltages

• These are Pb -Free Devices

• NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC -Q100 Qualified and PPAP Capable

• = C in is required if regulator is located an appreciable distance from power supply filter. ** = C O is not needed for stability, however, it does improve transient response.

$$V_{out} = 1.25\ V \left(1 + \frac{R_2}{R_1}\right) + I_{Adj}, R_2$$

Since I Adj is controlled to less than 100 m A, the error associated with this term is negligible in most applications.

Figure 1. Simplified Application

www.onsemi.com

Heatsink surface connected to Pin 2

TO -220AB T SUFFIX CASE 221AB

SOT -223 ST SUFFIX CASE 318E

DPAK DT SUFFIX CASE 369C

Heatsink Surface (shown as terminal 4 in case outline drawing) is connected to Pin 2.

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