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Parameters

Output options Adjustable Output Iout (Max) (A) 1.5 Vin (Max) (V) 60 Vin (Min) (V) 4.2 Vout (Max) (V) 57 Vout (Min) (V) 1.25 Noise (uVrms) 1710 Iq (Typ) (mA) 0.05 Thermal resistance θJA (°C/W) 23 Load capacitance (Min) (µF) 0 Rating Catalog Regulated outputs (#) 1 Features Accuracy (%) 5 PSRR @ 100 KHz (dB) 40 Dropout voltage (Vdo) (Typ) (mV) 2250 Operating temperature range (C) 0 to 125 open-in-new Find other Linear & low-dropout (LDO) regulators

Package | Pins | Size

TO-220 (NDE) 3 47 mm² 10.16 x 4.58 open-in-new Find other Linear & low-dropout (LDO) regulators

Features

  • Up to 60 V Input to Output Differential
  • 1.5-A Output Current
  • Line Regulation 0.01%/V (Typical)
  • Load Regulation 0.1% (Typical)
  • 80-dB Ripple Rejection (Typical)
  • Internal Short-Circuit Current Limiting Protection
  • Thermal Overload Protection
  • –55 to 150°C Operating Temperature Range
    (LM117HV)
  • 0 to 125°C Operating Temperature Range
    (LM317HV)
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Description

The LMx17HV is an adjustable 3-terminal positive voltage regulator capable of supplying 1.5 A or more currents over a 1.25-V to 57-V output voltage range. It requires only two external resistors to set the output voltage. The LMx17HV is packaged in standard transistor packages that are easily mounted and handled.

The LMx17HV offers overload protection like current limit, thermal overload protection and safe area protection, which make the device blowout proof. The overload protection circuitry remains fully functional even if the adjustment terminal is disconnected.

Typically, 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.

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, or in other words, do not short the output to ground.

By connecting a fixed resistor between the adjustment and output, the LMx17HV can also 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 1.25 V where most loads draw little current.

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Technical documentation

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Type Title Date
* Data sheet LMx17HV High Voltage Three-Terminal Adjustable Regulator With Overload Protection datasheet (Rev. D) Sep. 30, 2015
Application note A Topical Index of TI LDO Application Notes (Rev. F) Jun. 27, 2019
Application note AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B) May 06, 2013
Application note AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) May 06, 2013
Application note AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) May 06, 2013
Application note Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) May 05, 2013
Application note Packaging Limits Range of Linear Regulators May 08, 2010
Application note Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) Jun. 04, 2008
Application note Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems Oct. 03, 2002
Application note Understanding the Terms and Definitions of LDO Voltage Regulators Oct. 21, 1999

Design & development

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CAD/CAE symbols

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TO-220 (NDE) 3 View options

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