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LM2596R-ADJ

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HTC Korea TAEJIN Tech DC-DC Converters, TO-263-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM2596R-ADJ

HTC Korea TAEJIN Tech · DC-DC Converters · TO-263-5

LM2596R-ADJ from HTC Korea TAEJIN Tech, in a TO-263-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VIN power_in This is the positive input supply for the LM2596 step-down switching regulator, and a suitable input bypass capacitor must be present to minimize voltage transients and supply the switching currents.
2 VOUT output This is the emitter of the internal output switch, with a typical saturation voltage Vsat of 1.5 V, and the PCB area connected to this pin should be kept to a minimum to reduce coupling to sensitive circuitry.
3 GND power_in This is the circuit ground pin.
4 FEEDBACK input This pin senses the regulated output voltage to close the feedback loop, and on the adjustable version it is the direct input to the error amplifier, with external resistors R2 and R1 programming the output voltage.
5 ON/OFF input This TTL-compatible pin shuts the regulator down when driven above the typical 1.3 V threshold (up to +Vin), reducing total input supply current to approximately 80 uA, and the regulator is on if the pin is below 1.3 V or left open.
6 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer HTC Korea TAEJIN Tech
Package TO-263-5
Category Power Management (PMIC)
Pins 6

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Feedback Voltage (Vin=12V, ILOAD=0.5A, TJ=25℃) Vout 1.217 1.23 1.243 V Vin=12V, ILOAD=0.5A, TJ=25℃ 5
Feedback Voltage (8.0V≤Vin≤40V, 0.5A≤ILOAD≤3.0A, Vout=5.0V), TJ=25℃ Vout 1.193 1.23 1.267 V 8.0V≤Vin≤40V, 0.5A≤ILOAD≤3.0A, Vout=5.0V, TJ=25℃ 5
Feedback Voltage (8.0V≤Vin≤40V, 0.5A≤ILOAD≤3.0A, Vout=5.0V), TJ=-40℃ to +125℃ Vout 1.18 1.28 V 8.0V≤Vin≤40V, 0.5A≤ILOAD≤3.0A, Vout=5.0V, TJ=-40℃~+125℃ 5
Feedback Bias Current, TJ=25℃ Ib 11.52 12 12.48 nA Vout=5.0V (Adjustable version only), TJ=25℃ 6
Feedback Bias Current, TJ=0 to +125℃ Ib 11.4 12.6 nA Vout=5.0V (Adjustable version only), TJ=0~+125℃ 6
Oscillator Frequency, TJ=25℃ Fosc 127 150 173 kHz TJ=25℃ 6
Oscillator Frequency, TJ=0 to +125℃ Fosc 110 173 kHz TJ=0~+125℃ 6
Saturation Voltage, TJ=25℃ Vsat 1.16 1.4 V Iout=3.0A (note 3), TJ=25℃ 6
Saturation Voltage, TJ=0 to +125℃ Vsat 1.5 V Iout=3.0A (note 3), TJ=0~+125℃ 6
Current Limit (Peak Current), TJ=25℃ ICL 3.6 4.5 6.9 A Note 3, TJ=25℃ 6
Current Limit (Peak Current), TJ=0 to +125℃ ICL 3.4 7.5 A Note 3, TJ=0~+125℃ 6
Output Leakage Current IL 25 µA Output = 0V, TJ=25℃; Notes 5 and 6 6
Output Leakage Current IL 2 10 mA Output = -1.0V; Notes 5 and 6 6
Quiescent Current, TJ=0 to +125℃ IQ 10 mA TJ=0~+125℃; Note 5 6
Standby Quiescent Current, TJ=25℃ ISTBY 80 200 µA ON/OFF Pin = 5.0V (off), TJ=25℃ 6
Standby Quiescent Current, TJ=0 to +125℃ ISTBY 250 µA ON/OFF Pin = 5.0V (off), TJ=0~+125℃ 6
ON/OFF Pin Logic Input Level VIH, TJ=25℃ VIH 2 1.3 V Vout=0V, TJ=25℃ 6
ON/OFF Pin Logic Input Level VIH, TJ=0 to +125℃ VIH 2 V Vout=0V, TJ=0~+125℃ 6
ON/OFF Pin Logic Input Level VIL, TJ=25℃ VIL 1.3 0.6 V Vout=Nominal Output Voltage, TJ=25℃ 6
ON/OFF Pin Logic Input Level VIL, TJ=0 to +125℃ VIL 0.6 V Vout=Nominal Output Voltage, TJ=0~+125℃ 6
ON/OFF Pin Input Current IIH IIH 5 15 µA VLOGIC = 2.5V (Regulator OFF) 6
ON/OFF Pin Input Current IIL IIL 0.02 5 µA VLOGIC = 0.5V (Regulator ON) 6
Maximum Supply Voltage Vin 45 V 4
On/Off Pin Input Voltage (lower limit) -0.3 V -0.3V ≤ V ≤ +Vin; upper limit is +Vin, not a number 4
Output Voltage to Ground (Steady-State) -1 V Steady-state 4
Storage Temperature Range TSTG -60 150 ℃ 4
Lead Temperature (Soldering) 260 ℃ Soldering, 10 seconds 4
Maximum Junction Temperature TJ 150 ℃ 4
Minimum ESD Rating (Human Body Model) 2 kV Human Body Model 4
Thermal Resistance, Junction to Ambient (TO-263-5L) θJA 70 ℃/W TO-263-5 Lead package 4
Thermal Resistance, Junction to Case (TO-263-5L) θJC 5 ℃/W TO-263-5 Lead package 4
Operating Junction Temperature Range TJ -40 125 ℃ 5
Supply Voltage Vin 40 V 5

CAD (KiCad official)

  • Symbol: LM2596R-ADJ
  • Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
  • 3D model: TO-263-5 (KiCad packages3D, STEP)
  • 3D model files: lm2596r-adj-etched.step / lm2596r-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2596r-adj.step / lm2596r-adj.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: HTC Korea TAEJIN Tech datasheet (10 pp, sha256 5ebad324fb99ebbf, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF