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LN1138B502MR-G

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NATLINEAR Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LN1138B502MR-G

NATLINEAR · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L

LN1138B502MR-G from NATLINEAR, in a SOT-23-5L. 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 Input voltage pin, with the datasheet rating VIN from 2.0 V to 7 V in the electrical characteristics and an absolute maximum of VSS-0.3 V to VSS+8 V.
2 GND power_in Ground pin, which is the reference for VIN, VOUT and CE and must be tied to the system ground.
3 CE input Chip enable pin, where the MPN suffix B selects active-high enable without an internal pull-down, with VCEH minimum 1.6 V and VCEL maximum 0.25 V.
4 NC unconnected No internal connection; the pin is left floating (悬空) on the package.
5 VOUT power_out Regulated output pin, with a preset output voltage accurate to ±2.0% and output current up to 300 mA when VIN ≥ VOUT + 1 V.

Key specifications

Parameter Value
Manufacturer NATLINEAR
Package SOT-23-5L
Category Power Management (PMIC)
Pins 5

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 accuracy (set value) VOUT(E) -2 2 % VIN=VOUT(S)+1.0 V, IOUT=30 mA; table gives VOUT(S)×0.98 to VOUT(S)×1.02, i.e. printed ±2.0% accuracy 5
Output current IOUT 300 mA VIN≥VOUT(S)+1.0 V 5
Input voltage VIN 2 7 V 5
Dropout voltage Vdrop 0.12 0.2 V IOUT=50 mA 5
Dropout voltage Vdrop 0.3 0.45 V IOUT=100 mA 5
Input stability 0.1 0.2 %/V VOUT(S)+0.5 V ≤ VIN ≤ 7 V, IOUT=30 mA 5
Load stability VOUT 50 100 mV VIN=VOUT(S)+1.0 V, 1.0 mA ≤ IOUT ≤ 100 mA 5
Output voltage temperature coefficient -100 100 ppm/℃ VIN=VOUT(S)+1.0 V, IOUT=10 mA, -40°C ≤ Ta ≤ 85°C; printed ±100 5
CE low level (max) VCEL 0.25 V 5
CE high-level input current ICEH -0.1 0.1 μA VIN=VCE=VOUT(T)+1V 5
CE low-level input current ICEL -0.1 0.1 μA VIN=VOUT(T)+1V, VCE=VSS 5
Input voltage (absolute maximum) VIN -0.3 8 V Referenced to VSS (printed VSS-0.3 to VSS+8) 4
CE input voltage (absolute maximum) VCE -0.3 V Referenced to VSS; upper limit printed as VIN+0.3 4
Output voltage (absolute maximum) VOUT -0.3 V Referenced to VSS; upper limit printed as VIN+0.3 4
Power dissipation PD 250 mW SOT23-3L/5L, SOT-353 package 4
Operating temperature Topr -40 85 °C 4
Storage temperature Tstg -40 125 °C 4
Input capacitor CIN 1 µF Typical application circuit note 1
Output capacitor COUT 1 µF Typical application circuit note 1
Operating current ISS1 60 μA VIN=VOUT(S)+1.0 V 5
Ripple rejection /PSRR/ 60 dB VIN=VOUT(S)+1.0 V, f=1 kHz, Vrip=0.5 Vrms, IOUT=50 mA 5
Short-circuit current Ishort 40 mA VIN=VOUT(S)+1.0 V, VCE on, VOUT=0 V 5
CE minimum high level VCEH 1.6 V 5

CAD (KiCad official)

  • Symbol: LN1138B502MR-G
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: ln1138b502mr-g-etched.step / ln1138b502mr-g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ln1138b502mr-g.step / ln1138b502mr-g.glb are the bare package body.

Provenance

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

  • Datasheet: NATLINEAR datasheet (11 pp, sha256 4514d3b558ecd84e, retrieved 2026-10-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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