LM317T

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LM317T 的货源和报价

LM317T 的相关技术信息

LM317 - 3-Terminal Adjustable Regulator

Features

• Guaranteed 1% output voltage tolerance (LM317A)

• Guaranteed max. 0.01%/V line regulation (LM317A)

• Guaranteed max. 0.3% load regulation (LM117)

• Guaranteed 1.5A output current

• Adjustable output down to 1.2V

• Current limit constant with temperature

• P⁺ Product Enhancement tested

• 80 dB ripple rejection

• Output is short-circuit protected

General Description
The LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V output range. More...

Package Availability, Models, Samples & Pricing

Part Number Package Factory Lead Time Models Samples &
Electronic
Orders Budgetary Pricing Std
Pack
Size Package
Marking
Format

Type Pins Spec. MSL
Rating Peak
Reflow RoHS
Report Weeks Qty Qty $US each

LM317AEMP SOT-223 4 STD
NOPB 1
1 260
260 RoHS Full production N/A

1K+ $0.72 reel
of
1000 XYTT
N07A

6 weeks 20000

LM317EMP SOT-223 4 STD
NOPB 1
1 260
260 RoHS Full production N/A

1K+ $0.48 reel
of
1000 XYTT
N01A

8 weeks 20000

LM317AEMPX SOT-223 4 STD
NOPB 1
1 260
260 RoHS Full production N/A

1K+ $0.72 reel
of
2000 XYTT
N07A

6 weeks 7500

LM317EMPX SOT-223 4 STD
NOPB 1
1 260
260 RoHS Full production N/A

1K+ $0.48 reel
of
2000 XYTT
N01A

6 weeks 50000

LM317AT TO-220 3 STD
NOPB 1
1 NA
NA RoHS Full production N/A

1K+ $0.68 rail
of
45 NSUZXYTT
LM317AT P+

12 weeks 3000

LM317T TO-220 3 STD
NOPB 1
1 NA
NA RoHS Full production N/A

1K+ $0.68 rail
of
45 NSUZXYTT
LM317T P+

6 weeks 7500

LM317AMDT TO-252 3 STD
NOPB 1
2 235
260 RoHS Full production N/A

1K+ $0.61 rail
of
75 NSUZXYTT
LM317
AMDT

6 weeks 2000

LM317MDT TO-252 3 STD
NOPB 1
2 235
260 RoHS Full production N/A

1K+ $0.51 rail
of
75 NSUZXYTT
LM317
MDT

6 weeks 5000

LM317AMDTX TO-252 3 STD
NOPB 1
2 235
260 RoHS Full production N/A

1K+ $0.61 reel
of
2500 NSUZXYTT
LM317
AMDT

6 weeks 7500

LM317MDTX TO-252 3 STD
NOPB 1
2 235
260 RoHS Full production N/A

1K+ $0.51 reel
of
2500 NSUZXYTT
LM317
MDT

6 weeks 25000

LM317S TO-263 3 STD
NOPB 3
3 235
245 RoHS Full production N/A

1K+ $0.75 rail
of
45 NSUZXYTT
LM317S
P+

12 weeks 7500

LM317SX TO-263 3 STD
NOPB 3
3 235
245 RoHS Full production N/A

1K+ $0.75 reel
of
500 NSUZXYTT
LM317S
P+

6 weeks 7500

LM317AEMPEP SOT-223 4 RoHS Not recommended for new designs
(as of 12-Oct-06) N/A
CALL reel
of
N/A XYTT
N07E

N/A 5000

LM317AH TO-39 3 STD
NOPB 1
1 NA
NA RoHS Full production N/A

1K+ $3.90 box
of
500 NSZXYTT LM317AHP+

8 weeks 2000

LM317H TO-39 3 STD
NOPB 1
1 NA
NA RoHS Full production N/A

1K+ $3.90 box
of
500 NSZXYTT LM317HP+

6 weeks 7500

LM317K STEEL TO-3 2 STD
NOPB 1
1 NA
NA RoHS Full production N/A

1K+ $6.13 tray
of
50 NSZXYTT
LM317K
STEELP+

6 weeks 1000

LM317K MDC Unpackaged Die Full production N/A
CALL tray
of
N/A -

N/A 5000

LM317A MWC Wafer Full production N/A
CALL wafer jar
of
N/A -

N/A 40000

LM317K MWC Wafer Full production N/A
CALL wafer jar
of
N/A -

N/A 5000

General Description

The LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V output range. They are exceptionally easy to use and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators. Also, the LM117 is packaged in standard transistor packages which are easily mounted and handled.

In addition to higher performance than fixed regulators, the LM117 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 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 optional output capacitor can be added to improve transient response. The adjustment terminal can be bypassed to achieve very high ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators.

Besides replacing fixed regulators, the LM117 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.

Also, it makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment pin and output, the LM117 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.

For applications requiring greater output current, see LM150 series (3A) and LM138 series (5A) data sheets. For the negative complement, see LM137 series data sheet.

Application Notes

Title Size in Kbytes Date

AN-1148: Application Note 1148 Linear Regulators: Theory of Operation and Compensation 200 Kbytes 25-Sep-02 View Online Download Receive via Email

AN-1148 (Japanese): Application Note 1148 Linear Regulators: Theory of Operation and Compensation
216 Kbytes

AN-1164: Application Note 1164 LM3647 Reference Design User's Manual 197 Kbytes 9-Mar-01 View Online Download Receive via Email

AN-1165: Application Note 1165 Configuration Guide for LM3647 Reference Design 32 Kbytes 28-Sep-00 View Online Download Receive via Email

AN-1378: Application Note 1378 Method For Calculating Output Voltage Tolerances in Adjustable Regulators 647 Kbytes 15-Jul-05 View Online Download Receive via Email

AN-1378 (Chinese): Application Note 1378 Method For Calculating Output Voltage Tolerances in Adjustable Regulators
383 Kbytes

AN-178: Application Note 178 Applications for an Adjustable IC Power Regulator 115 Kbytes 3-Oct-02 View Online Download Receive via Email

AN-181: Application Note 181 3-Terminal Regulator is Adjustable 165 Kbytes 3-Oct-02 View Online Download Receive via Email

AN-182: Application Note 182 Improving Power Supply Reliability with IC Power Regulators 56 Kbytes 3-Oct-02 View Online Download Receive via Email

AN-556: Application Note 556 Introduction to Power Supplies 159 Kbytes 25-Sep-02 View Online Download Receive via Email

AN-556 (Japanese): Application Note 556 Introduction to Power Supplies
171 Kbytes

LB-35: Linear Brief 35 Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems 70 Kbytes 3-Oct-02 View Online Download Receive via Email

LB-46: Linear Brief 46 A New Production Technique for Trimming Voltage Regulators 71 Kbytes 3-Oct-02 View Online Download Receive via Email

LB-47: Linear Brief 47 High Voltage Adjustable Power Supplies 52 Kbytes 3-Oct-02 View Online Download Receive via Email
Typical Application
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Typical Performance
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