LM317MEVM
DCY (R-PDSO-G4)
Manufacturer
Texas Instruments
Overview
Part: LM317M, LM317MQ from Texas Instruments
Type: 3-Pin Adjustable Positive-Voltage Regulators
Key Specs:
- Adjustable Output Voltage Range: 1.25V to 37V
- Output Current: Up to 500mA
- Operating Temperature Range: –40°C to +125°C
- Typical Line Regulation: 0.01%
- Typical Load Regulation: 0.1%
- Recommended Input-to-Output Differential Voltage: 2.5V to 37V
Features:
- Adjustable output voltage
- Built-in short-circuit current limiting
- Built-in thermal protection
- Stable without any output capacitor
- Requires only two external resistors to set output voltage
- Floating regulator design
- Quiescent current flows to the load
- Safe operating area protection
- High ripple-rejection ratios with ADJUST pin bypass capacitor
Applications:
- Cordless vacuum cleaners
- Building security gateways
- Multifunction printers
- Onboard charging
Package:
- SOT-223 (DCY): 6.5mm × 7mm
- TO-252 (KVU): 6.6mm × 10.11mm
Features
- Adjustable output voltage range (VOUT): 1.25V to 37V
- Output current (IOUT): Up to 500mA
- Built-in, short-circuit current limiting and thermal protection
- Stable without any output capacitor
- Operating temperature range: –40°C to +125°C
- Packages:
- 4-pin, 6.5mm × 7mm SOT-223 (RθJA : 77.7°C/W)
- 3-pin, 6.6mm × 10.11mm TO-252 (RθJA : 31.7°C/W)
Applications
Pin Configuration
Figure 4-1. DCY Package, 3-Pin SOT-223 (Top View)
Figure 4-2. KVU Package, 3-Pin TO-252 (Top View)
Table 4-1. Pin Functions
| PIN | |
|---|---|
| NAME | NO. |
| ADJUST | 1 |
| OUTPUT | 2 |
| INPUT | 3 |
Electrical Characteristics
over recommended operating virtual-junction temperature range TJ = -40°C to 125°C, VI - VO = 5 V , IO = 0.1 A (unless otherwise noted)
| PARAMETER | TES | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|
| Line and the second | N N 0V/4- 40V/ | T J = 25°C | Legacy chip and new chip | 0.01 | |
| Line regulation | VI - VO = 3V to 40V | Legacy chip | and new chip | 0.02 | |
| T 0500 | Legacy chip | 0.1 | |||
| 1. 40 4 to 500 4 | T J = 25°C | New chip | 0.1 | ||
| Load regulation | I O = 10mA to 500mA | Legacy chip | 0.3 | ||
| New chip | 0.1 | ||||
| AD IIICT torminal ourrent | Legacy chip | 50 | |||
| ADJUST terminal current | New chip | 45 | |||
| Change in ADJUST | V I – V O = 3V to 40V, I O = 10mA to 500mA | Legacy chip | 0.2 | ||
| terminal current | VI - VO = 3V to 15V, IO = 10mA VI - VO = 15V to 40V, IO = 100r | New chip | 0.2 | ||
| Defenses wellers | V I – V O = 3V to 40V, I O = 10mA to 500mA | Legacy chip | 1.2 | 1.25 | 1.3 |
| Reference voltage | VI - VO = 3V to 15V, IO = 10mA VI - VO = 15V to 40V, IO = 100mA | New chip | 1.2 | 1.25 | |
| Minimum load current to | Legacy chip | 3.5 | |||
| maintain regulation | New chip | 1.1 | 2 | ||
| Output-voltage temperature stability | Legacy chip and new chip | 0.7 | |||
| V I – V O ≤ 15V | Legacy chip | 500 | 900 | ||
| Maximum output current | V - VO = 13V | New chip | 500 | 1000 | |
| Maximum output current | VI - VO = 40V, PD ≤ PD(max) | T J = 25°C | Legacy chip | 150 | 250 |
| (1) | 11 - 25 C | New chip | 110 | 220 | |
| RMS output noise voltage (% of VO) | f = 10Hz to 10kHz, | f = 10Hz to 10kHz, T J = 25°C | 0.003 | ||
| 1 4 4 . 1 . 124 . | T J = 25°C | Legacy chip | 0.3 | ||
| Long-term stability | I O =10mA | T J = 25°C | New chip | 0.3 | |
| V = 10 V f = 120Hz C = 0 | T = 25°C | Legacy chip | 65 | ||
| Pinnle rejection | V0 = 10 V, f = 120 Hz, CADJ = 0 | 11-25 C | New chip | 65 | |
| Ripple rejection | V O = 10 V, f = 120Hz, C ADJ = | Legacy chip | 66 | 80 | |
| 10μF | TJ = 25°C | New chip | 66 | 80 |
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Vi - Vo | Input-to-output differential voltage | 40 | V | |
| TJ | Operating junction temperature | 150 | °C | |
| Tstg | Storage temperature | –65 | 150 | °C |
(1) Stresses beyond those listed under Absolute Maximum Rating may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Condition. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Recommended Operating Conditions
over operating junction temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| V I - V O | Input-to-output differential voltage | 2.5 | 37 | V | |
| Vo | Output voltage | 1.25 | 37 | V | |
| Io | Output current | 0.01 | 0.5 | Α | |
| C IN | Input capacitor | 0.1 | μF | ||
| C OUT (1) | Output capacitor | 0.1 | μF | ||
| ESR (1) | Output capacitor | 0.01 | 2 | Ω | |
| T J | Operating junction temperature | -40 | 125 | °C |
(1) LM317M regulator doesn't need any output capacitor for LDO stability.
Thermal Information
| LM317M, LM317MQ | ||
|---|---|---|
| THERMAL METRIC(1) | DCY (Legacy Chip) | |
| 3 PINS | ||
| Rθ JA | Junction-to-ambient thermal resistance | 60.2 |
| R θJC(top) | Junction-to-case (top) thermal resistance | 42 |
| Rθ JB | Junction-to-board thermal resistance | 9.4 |
| PsiJT | Junction-to-top characterization parameter | 3.4 |
| PsiJB | Junction-to-board characterization parameter | 9.3 |
| R 0 JC(bot) | Junction-to-case (bottom) thermal resistance | n/a |
Copyright © 2025 Texas Instruments Incorporated Product Folder Links: LM317M LM317MQ
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| LM317 | Texas Instruments | — |
| LM317M | Texas Instruments | — |
| LM317MDCY | Texas Instruments | — |
| LM317MDCY.A | Texas Instruments | — |
| LM317MDCYR | Texas Instruments | — |
| LM317MDCYR.A | Texas Instruments | — |
| LM317MDT-TR | Texas Instruments | TO-252-2(DPAK) |
| LM317MQ | Texas Instruments | — |
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