component
LTH7
Public Unreviewedby Ray
TECH PUBLIC Battery Management, SOT-23-5L. Datasheet-verified pinout, 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
markdownLTH7
TECH PUBLIC · Battery Management · SOT-23-5L
LTH7 from TECH PUBLIC, in a SOT-23-5L. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CHRG | output | Open-drain charge status output. Pulled low by an internal N-channel MOSFET during charging and goes high-impedance when charging completes or when the low-battery lockout condition is detected. With a 1 uF cap from BAT to GND, the pin also indicates battery presence (LED flashes rapidly when no battery is attached). |
| 2 | GND | power_in | Device ground reference. |
| 3 | BAT | power_out | Charge current output to the Li-ion battery. Regulates the float voltage to 4.2 V and delivers programmed charge current (up to ~500 mA). Contains an internal precision resistor divider that senses the float voltage and an ESD protection network; sourcing ~1 mA between GND and BAT if the battery is connected in reverse. |
| 4 | VCC | power_in | External supply input, operating range 4.3 V to 7 V (absolute max 11 V). Requires at least a 0.1-1 uF decoupling capacitor to GND. When VCC falls within 30 mV of VBAT, the chip enters sleep mode and BAT current drops below 2 uA. |
| 5 | PROG | bidirectional | Charge current program, monitor, and shutdown pin. A resistor from PROG to GND sets IBAT = (VPROG/RPROG) x 1000 (typical PROG voltage 1.0 V in constant-current mode; RPROG=2 kOhm -> ~500 mA, RPROG=10 kOhm -> ~100 mA). Disconnecting PROG from GND causes an internal 2.5 uA pull-up to raise the pin; crossing the ~1.0 V manual-shutdown threshold puts the charger into standby (supply current drops to ~40 uA). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-5L |
| Category | Power Management (PMIC) |
| Pins | 5 |
CAD (KiCad official)
- Symbol:
LTH7 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TECH PUBLIC datasheet (5 pp, sha256
48374b61c08beea0, retrieved 2026-08-17, 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).