LTC4057ES5-4.2#TRPBF Analog Devices Integrated Circuit (SOT23 (5-Pin)) In Stock
The LTC4057ES5-4.2#TRPBF is a standalone linear Li-Ion battery charger IC with a 4.2V charge termination voltage and programmable charge current up to 600mA, designed for single-cell lithium-ion and lithium-polymer batteries. It features an adjustable charge current threshold and a thermistor input for temperature-qualified charging, all in a compact 5-pin TSOT-23 package. Available in tape-and-reel from Analog Devices with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LTC4057ES5-4.2#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.1300(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC4057ES5-4.2#TRPBF?
- 4.2V precision charge termination for single-cell Li-Ion/LiPo batteries with ±0.6% voltage accuracy
- Programmable charge current up to 600mA via external resistor for flexible battery capacity support
- Adjustable threshold with NTC thermistor input enables temperature-qualified charging from 0°C to 45°C
- Standalone operation requires no MCU or external MOSFET, minimizing BOM complexity
- Ultra-compact 5-pin TSOT-23 package occupies less than 10 mm² of PCB area
What is LTC4057ES5-4.2#TRPBF used for?
The LTC4057ES5-4.2#TRPBF is well suited for wearable devices, wireless sensors, Bluetooth headsets, and other handheld consumer electronics powered by single-cell lithium-ion or lithium-polymer batteries up to 600mA charge current. Its tiny TSOT-23 package and standalone operation make it the simplest charging solution for space-constrained products where no microcontroller is available to manage charging. Medical wearables and IoT edge nodes with USB or DC wall-adapter charging also benefit from its temperature-sensing safety feature.
What are the specifications of LTC4057ES5-4.2#TRPBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1635 |
| YTEOL | 8.5 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Channels | 2 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.6mA |
| Supply Voltage-Max (Vsup) | 6.5V |
| Supply Voltage-Min (Vsup) | 4.25V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## LTC4057ES5-4.2#TRPBF Alternates Showing results | Image |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Where can I find the LTC4057ES5-4.2#TRPBF datasheet?
LTC4057ES5-4.2#TRPBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC4057ES5-4.2#TRPBF?
Compatible alternatives and drop-in replacements for LTC4057ES5-4.2#TRPBF:
suggested
Frequently Asked Questions
What charge termination voltage and maximum charge current does the LTC4057ES5-4.2#TRPBF support?
The LTC4057ES5-4.2#TRPBF charges single-cell Li-Ion and LiPo batteries to a precise 4.2V termination voltage with ±0.6% accuracy, and supports a programmable charge current of up to 600mA set by a single external resistor. This combination covers battery capacities from small 100mAh cells in wearables to 500mAh cells in Bluetooth audio devices.
How does the NTC thermistor input on the LTC4057ES5-4.2#TRPBF protect the battery during charging?
The LTC4057ES5-4.2#TRPBF includes an NTC thermistor input (NTCB pin) that monitors battery temperature and suspends or reduces charging when the temperature falls outside the safe 0°C to 45°C charging window. This hardware-level thermal protection prevents lithium-ion cell damage without requiring any firmware, making it especially reliable in consumer devices that charge in varying ambient temperatures.
Why is the 5-pin TSOT-23 package of the LTC4057ES5-4.2#TRPBF advantageous for wearable product designs?
The 5-pin TSOT-23 package of the LTC4057ES5-4.2#TRPBF occupies less than 10 mm² of PCB area and requires only a few passive components—a charge-current resistor, decoupling capacitors, and an optional NTC thermistor—to form a complete Li-Ion charger circuit. This ultra-compact footprint and minimal BOM make it ideal for smartwatches, fitness bands, and hearable devices where every square millimeter and milligram matters.
When would a designer choose LTC4057ES5-4.2#TRPBF over a more complex charger IC like the LTC4162?
Designers choose the LTC4057ES5-4.2#TRPBF when the application uses a single Li-Ion cell (4.2V) with charge current below 600mA and does not require PowerPath control, multi-cell support, or I2C telemetry. Its standalone linear architecture with just 5 pins eliminates host MCU overhead, making it the lower-cost, simpler alternative for basic USB-powered charger circuits in BOM-sensitive, high-volume consumer products.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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