LM317MTG

Part: LM317M — ON Semiconductor

Type: Adjustable Positive Voltage Regulator

Description: An adjustable three-terminal positive voltage regulator capable of supplying in excess of 500 mA over an output voltage range of 1.2 V to 37 V, featuring internal current limiting, thermal shutdown, and safe area compensation.

Operating Conditions:

• Supply voltage: 4.2–77 V (derived from V_out range and V_I-V_O differential)
• Operating temperature: 0 to +125 °C (junction temperature, suffix-dependent)
• Output voltage range: 1.2 V to 37 V

Absolute Maximum Ratings:

• Max input-output voltage differential: 40 V
• Max junction temperature: +150 °C
• Max storage temperature: -65 to +150 °C

Key Specs:

• Reference Voltage (V_ref): 1.20 V (min) to 1.30 V (max)
• Line Regulation (T_A = 25 °C): 0.04 % (max)
• Load Regulation (V_O <= 5.0 V, T_A = 25 °C): 25 mV (max)
• Adjustment Pin Current (I_Adj): 100 μA (max)
• Minimum Load Current (I_Lmin): 10 mA (max)
• Maximum Output Current (I_max, V_I-V_O <= 15 V): 0.5 A (min)
• RMS Noise (% of V_O, 10 Hz <= f <= 10 kHz): 0.003 % (typ)
• Ripple Rejection (V_O = 10 V, f = 120 Hz, without C_Adj): 66 dB (min)

Features:

• 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
• Pb-Free Devices
• NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; 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)
• SOT-223 (ST Suffix)
• DPAK (DT Suffix)

• 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.

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

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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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