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LP3965S-3.3

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HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-263-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LP3965S-3.3

HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-263-5

LP3965S-3.3 from HGSEMI, 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 SD input Shutdown control input: the output turns off when it is pulled low to 0 to 0.2V and on when it is high at VIN-0.3V, with the survival range stated as -0.3V to VIN+0.3V.
2 VIN power_in Input supply pin, operating from 2.5V to 7.0V, with the minimum at the greater of VOUT(NOM)+VDROPOUT or 2.5V.
3 GND power_in Ground reference pin for the regulator.
4 VOUT power_out Regulated output voltage pin, rated for 1.5A DC maximum operating current and with a survival range of -0.3V to +7.5V.
5 SENSE/ADJ input Remote sense pin that improves load regulation at remote loads, with a maximum voltage of VOUT+0.3V; on the ADJ version this pin is the output adjust pin.
6 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer HGSEMI
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
Output Voltage Tolerance (TJ=25°C) VO -1.5 0 1.5 % 10 mA ≤ IL ≤ 1.5A, VOUT +1 ≤ VIN ≤ 7.0V; standard typeface (TJ=25°C) 7
Output Voltage Tolerance (full operating temperature range) VO -3 3 % 10 mA ≤ IL ≤ 1.5A, VOUT +1 ≤ VIN ≤ 7.0V; boldface (full operating temperature range) 7
Output Voltage Line Regulation ∆VOL 0.02 0.06 % VOUT+1V<VIN<7.0V 7
Output Voltage Load Regulation ∆VO/∆IOUT 0.04 0.09 % 10 mA < IL < 1.5 A 7
Dropout Voltage (TJ=25°C) VIN - VOUT 38 45 mV IL = 150 mA; standard typeface (TJ=25°C) 7
Dropout Voltage (full operating temperature range) VIN - VOUT 55 mV IL = 150 mA; boldface (full operating temperature range) 7
Dropout Voltage (TJ=25°C) VIN - VOUT 380 450 mV IL = 1.5 A; standard typeface (TJ=25°C) 7
Dropout Voltage (full operating temperature range) VIN - VOUT 550 mV IL = 1.5 A; boldface (full operating temperature range) 7
Ground Pin Current in Normal Operation (TJ=25°C) IGND 4 9 mA IL = 150 mA; standard typeface (TJ=25°C) 7
Ground Pin Current in Normal Operation (full operating temperature range) IGND 10 mA IL = 150 mA; boldface (full operating temperature range) 7
Ground Pin Current in Normal Operation (TJ=25°C) IGND 5 14 mA IL = 1.5 A; standard typeface (TJ=25°C) 7
Ground Pin Current in Normal Operation (full operating temperature range) IGND 15 mA IL = 1.5 A; boldface (full operating temperature range) 7
Ground Pin Current in Shutdown Mode (TJ=25°C) IGND 15 25 µA VSD ≤ 0.2V (Note 11); standard typeface (TJ=25°C) 7
Ground Pin Current in Shutdown Mode (full operating temperature range) IGND 75 µA VSD ≤ 0.2V (Note 11); boldface (full operating temperature range) 7
Peak Output Current (TJ=25°C) IO(PK) 2 2.5 A Note 2; standard typeface (TJ=25°C) 7
Peak Output Current (full operating temperature range) IO(PK) 1.7 A Note 2; boldface (full operating temperature range) 7
Shutdown Threshold, Output = Low VSDT 0 0.2 V Output = Low 7
Storage Temperature Range -65 150 °C 6
Lead Temperature (Soldering, 10 sec.) 245 °C Soldering, 10 sec. 6
ESD Rating 2 kV Human body model (Note 3) 6
Input Supply Voltage (Survival) -0.3 7.5 V Survival 6
Output Voltage (Survival) -0.3 7.5 V Survival; Notes 6, 7 6
Input Supply Voltage (Operating) 2.5 7 V Note 12 6
Shutdown Input Voltage (Operating) -0.3 0.3 V Operating 6
Maximum Operating Current (DC) 1.5 A DC 6
Operating Junction Temperature Range -40 125 °C 6
Junction-to-Ambient Thermal Resistance (TO-263) θjA 60 °C/W TO263 package, 0.5 in², 1 oz. copper area, no heat sink (derating value, Note 2) 8
Shutdown Threshold (Tsh(t)) Tsh(t) 165 ˚C Over-temperature shutdown threshold 7
Thermal Shutdown Hysteresis Tsh(h) 10 ˚C 7
Short Circuit Current ISC 4.5 A Short circuit 7
Turn-off Delay TdOFF 20 µs IL = 1.5 A 8
Turn-on Delay TdON 25 µs IL = 1.5 A 8
SD Input Current ISD 1 nA VSD = VIN 8
Ripple Rejection PSRR 60 dB VIN = VOUT + 1.5V, COUT = 100uF, VOUT = 3.3V 8
Ripple Rejection PSRR 40 dB VIN = VOUT + 0.3V, COUT = 100uF, VOUT = 3.3V 8
Output Noise Density pn(l/f) 0.8 µV f = 120Hz 8
Output Noise Voltage en 150 µV (rms) BW = 10Hz, 100kHz 8
Output Noise Voltage en 100 µV (rms) BW = 300Hz, 300kHz 8

CAD (KiCad official)

  • Symbol: LP3965S-3.3
  • Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
  • 3D model: TO-263-5 (KiCad packages3D, STEP)
  • 3D model files: lp3965s-3-3-etched.step / lp3965s-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lp3965s-3-3.step / lp3965s-3-3.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (14 pp, sha256 24400a68d14cd2cf, 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