TSM1051CLT STMicroelectronics Integrated Circuit (SOT23 (6-Pin)) In Stock
TSM1051CLT is a single-cell linear Li-ion battery charge controller by STMicroelectronics with 50 mA charge current. Key specs: 4.2 V charge voltage, thermal regulation, 6-pin SOT-23 package. From $0.65, in stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- OBSOLETE
- Datasheet
- TSM1051CLT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3597(MOQ 9000)
- Temp Range
- ?°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TSM1051CLT?
- Single-cell Li-ion linear charger delivering up to 50 mA constant-current / constant-voltage charge with integrated 4.2 V regulation for safe cell charging
- Built-in thermal regulation automatically reduces charge current when junction temperature rises, protecting both the IC and the battery without external thermistors
- Ultra-compact 6-pin SOT-23 footprint with minimal external components — typically requires only a few passive decoupling components — ideal for space-constrained wearable and IoT devices
What is TSM1051CLT used for?
The TSM1051CLT is used in wearable devices and small IoT nodes where a single-cell Li-ion or Li-polymer battery must be charged from a USB 5 V input with up to 50 mA charge current. Its integrated 4.2 V regulation and thermal fold-back make it a self-contained charging solution for Bluetooth earbuds, health sensors, and badge-style tracking devices. Industrial wireless sensor nodes and small handheld instruments also use this IC when PCB area and BOM count are constrained.
What are the specifications of TSM1051CLT?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Adjustable Threshold | NO |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 2mA |
| Supply Voltage-Max (Vsup) | 12V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Temperature Grade | OTHER |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the TSM1051CLT datasheet?
TSM1051CLT Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for TSM1051CLT?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum charge current and charge voltage of the TSM1051CLT?
The TSM1051CLT provides a maximum charge current of 50 mA in the constant-current phase and regulates the cell to 4.2 V in the constant-voltage phase, which is the standard termination voltage for single-cell Li-ion and Li-polymer batteries. The 4.2 V precision regulation typically holds within ±1 %, ensuring safe and repeatable charging.
How does the thermal regulation feature of the TSM1051CLT protect battery life in compact designs?
When the junction temperature of the TSM1051CLT approaches its thermal regulation setpoint — typically around 110 °C — the IC automatically reduces the charge current below the 50 mA setting to prevent overheating. This protects the battery from elevated-temperature charging stress that can accelerate cell degradation, without requiring any external NTC thermistor or thermal management circuit.
Which package does the TSM1051CLT use, and how small is its PCB footprint?
The TSM1051CLT comes in a 6-pin SOT-23 package measuring approximately 2.9 mm × 1.6 mm with a 0.95 mm pitch. This is among the smallest available IC charger footprints, making the TSM1051CLT suitable for wearables and earbuds where total PCB area may be under 100 mm² and component height must stay below 1.5 mm.
Can the TSM1051CLT charge from a 5 V USB source, and are there restrictions on the input voltage?
Yes, the TSM1051CLT operates from a 4 V to 6.5 V input supply, making it directly compatible with standard 5 V USB charging sources. The input headroom above the 4.2 V cell voltage allows the linear regulator to maintain regulation, and the 6.5 V upper limit protects the IC from USB voltage spikes or slightly elevated power adapter outputs in the 5.25 V range.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 9000+ | $0.3679 | $3311.01 |
| 15000+ | $0.3627 | $5441.10 |
| 21000+ | $0.3597 | $7554.33 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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