component
XT2051Y2ASR-G
Public Made by Adomby adom
NATLINEAR Battery Management ICs, SOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownXT2051Y2ASR-G
NATLINEAR · Battery Management ICs · SOP-8-EP
XT2051Y2ASR-G from NATLINEAR, in a SOP-8-EP. 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 | TEMP | input | Battery NTC sensor input; charging is suspended if VTEMP is below 30% or above 60% of VIN, and continues when between 30% and 60%. |
| 2 | ISET | bidirectional | Charge current programming, monitoring and shutdown pin; a 1% resistor to ground sets IBAT = (VISET/RISET)×1000 with 1V at this pin in constant-current mode, and pulling it above 1.21V stops charging. |
| 3 | GND | power_in | Ground terminal, also connected to the exposed pad. |
| 4 | VIN | power_in | Positive supply input, 4.25V to 6.5V, requiring at least a 1µF bypass capacitor. |
| 5 | BAT | bidirectional | Battery positive terminal connection that supplies charge current and constant-voltage charging voltage, with pin current below 2µA in lockout or sleep mode. |
| 6 | DONE | output | Open-drain charge-end status output pulled low by an internal switch when charging has ended, otherwise high impedance. |
| 7 | CHRG | output | Open-drain charging status output pulled low by an internal switch while charging, otherwise high impedance. |
| 8 | FB | input | Kelvin battery voltage sense input that regulates the constant charging voltage, and a resistor between FB and BAT adjusts that voltage. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | NATLINEAR |
| Package | SOP-8-EP |
| Category | Power Management ICs |
| Pins | 9 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input supply voltage | Vcc | 4.25 | 6.5 | V | 6 | ||
| Regulated output voltage | Vfloat | 4.158 | 4.2 | 4.242 | V | 0℃≤TA≤85℃,IBAT=40mA | 6 |
| BAT pin current, current mode | Ibat | 90 | 100 | 110 | mA | Riset=10k,Current mode | 6 |
| BAT pin current, current mode | Ibat | 900 | 1000 | 1100 | mA | Riset=1k,Current mode | 6 |
| Trickle charge current | Itrikl | 90 | 100 | 110 | mA | Vbat<Vtrikl,Rprog=2k | 6 |
| Trickle charge threshold voltage | Vtrikl | 2.8 | 2.9 | 3 | V | Riset=10K，Vbat Rising | 6 |
| Trickle voltage hysteresis | Vtrhys | 60 | 80 | 110 | mV | Riset=10k | 6 |
| Vcc undervoltage lockout threshold | Vuv | 3.7 | 3.8 | 3.93 | V | From Vcc low to high | 6 |
| Vcc undervoltage lockout hysteresis | Vuvhys | 150 | 200 | 300 | mV | 6 | |
| Manual shutdown threshold voltage, rising | Vmsd | 1.15 | 1.21 | 1.3 | V | Iset pin rising | 6 |
| Manual shutdown threshold voltage, falling | Vmsd | 0.9 | 1 | 1.1 | V | Iset pin falling | 6 |
| Vcc-Vbat lockout threshold voltage, rising | Vasd | 70 | 100 | 140 | mV | Vcc from low to high | 6 |
| Vcc-Vbat lockout threshold voltage, falling | Vasd | 5 | 30 | 50 | mV | Vcc from high to low | 6 |
| C/10 termination current threshold | Iterm | 8 | 10 | 12 | mA | Riset=10k | 6 |
| C/10 termination current threshold | Iterm | 40 | 50 | 65 | mA | Riset=2k | 6 |
| PROG pin voltage | Vprog | 0.93 | 1 | 1.07 | V | Riset=10k, Current mode | 6 |
| BAT pin current, shutdown mode | Ibat | -0.1 | 0.1 | µA | Shutdown mode | 6 | |
| BAT pin current, sleep mode | Ibat | -0.1 | 0.1 | µA | Sleep mode,Vcc=0V | 6 | |
| BAT pin current, standby mode | Ibat | 0 | -2.5 | -6 | µA | Standby mode,Vbat=4.2V | 6 |
| Input supply current, charge mode | Icc | 200 | 2000 | µA | Charge mode,Riset=10K | 6 | |
| Input supply current, standby mode | Icc | 200 | 500 | µA | Standby mode | 6 | |
| Input supply current, shutdown mode | Icc | 25 | 70 | µA | Shutdown mode(Riset not connected,Vcc<Vbat or Vcc<Vuv) | 6 | |
| CHRG pin output low voltage (DONE) | Vdone | 0.35 | 0.6 | V | Idone=5mA | 6 | |
| CHRG pin output low voltage | Vchrg | 0.35 | 0.6 | V | Ichrg=5mA | 6 | |
| Recharge battery threshold voltage | ΔVrecg | 150 | 200 | mV | VFLOAT - VRECHRG | 6 | |
| Input supply voltage | Vcc | -0.3 | 7 | V | VSS-0.3 to VSS+7 | 3 | |
| ISET pin voltage | Vprog | -0.3 | V | VSS-0.3 to Vcc+0.3 | 3 | ||
| BAT pin voltage | Vbat | -0.3 | 6 | V | Vss-0.3 to 6 | 3 | |
| DONE pin voltage | Vdone | -0.3 | 7 | V | VSS-0.3 to VSS+7 | 3 | |
| CHRG pin voltage | Vchrg | -0.3 | 7 | V | VSS-0.3 to VSS+7 | 4 | |
| BAT pin current | Ibat | 1500 | mA | 4 | |||
| ISET pin current | Iprog | 1500 | µA | 4 | |||
| Operating ambient temperature | Topa | -40 | 85 | °C | 4 | ||
| Storage temperature | Tstr | -65 | 125 | °C | 4 |
CAD (KiCad official)
- Symbol:
XT2051Y2ASR-G - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: SOP-8-EP (KiCad packages3D, STEP)
- 3D model files:
xt2051y2asr-g-etched.step/xt2051y2asr-g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);xt2051y2asr-g.step/xt2051y2asr-g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: NATLINEAR datasheet (12 pp, sha256
1bb5f903dfefacbf, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).