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Analog Devices Inc. LTC4059AEDC#TRPBF
- Part No.:
- LTC4059AEDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC4059AEDC#TRPBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,871
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Product details
Overview
LTC4059AEDC#TRPBF from Analog Devices (formerly Linear Technology) is a 900mA linear lithium-ion battery charger IC with thermal regulation, constant-current/constant-voltage operation, and an open-drain ACPR status pin indicating input supply presence. It charges single-cell Li-Ion batteries directly from USB or wall adapters (3.75V–8V), features ±0.6% 4.2V float voltage accuracy, 10µA shutdown current, and operates in a 2mm × 2mm DFN package.
For engineers reviewing the LTC4059AEDC#TRPBF datasheet, LTC4059AEDC#TRPBF pinout, LTC4059AEDC#TRPBF application, or LTC4059AEDC#TRPBF equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternatives, and supply-chain support details specific to this exact variant.
Technical Context
The LTC4059AEDC#TRPBF implements a three-loop control architecture-constant-current (CA), constant-voltage (VA), and constant-temperature (TA)-with internal P-channel MOSFET and precision 1.21V reference. Its ACPR pin provides open-drain power-good indication tied to undervoltage lockout (UVLO) threshold (100–200mV above VBAT), distinguishing it from the LTC4059's Li-CC pin.
Thermal regulation activates at ~115°C junction temperature, dynamically reducing charge current to maintain safe die temperature without external components. Charge current is programmed via a single resistor (RPROG) from PROG to GND, with IBAT = 1000 × VPROG/RPROG, where VPROG is servoed to 1.21V in CC mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Current | Up to 900mA programmable; enables fast charging of 800mAh Li-Ion cells in under 2 hours with thermal foldback. |
| Float Voltage | 4.2V ±0.6% (4.158V–4.242V); ensures cell longevity and compliance with standard Li-Ion termination. |
| Input Voltage Range | 3.75V to 8V; supports direct USB 5V and common wall adapters without external regulators. |
| Shutdown Supply Current | 10µA typical; minimizes battery drain during system sleep or standby modes. |
| ACPR Output Logic | Open-drain low when VCC > UVLO threshold; allows simple µC GPIO monitoring of input power presence. |
| Thermal Regulation Threshold | Junction temperature ~115°C; automatically scales back charge current to prevent overheating on compact PCBs. |
| Package Thermal Resistance | θJA = 60°C/W (with exposed pad soldered); requires PCB ground plane connection for full 900mA capability. |
Pinout & Package
Package: 6-lead, 2mm × 2mm × 0.75mm plastic DFN (DC6) with exposed thermal pad (Pin 7, GND), requiring soldering to PCB ground for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 7) | Ground reference and thermal path | Exposed pad must be soldered to PCB ground plane; failure reduces thermal performance by >50%. |
| ACPR (Pin 2) | Open-drain input supply status output | Pulls low when VCC exceeds UVLO threshold (~150mV above VBAT); high-impedance otherwise. |
| BAT (Pin 3) | Battery charge output and voltage regulation node | Delivers regulated 4.2V float voltage; internal divider sets accuracy; disconnects in shutdown. |
| VCC (Pin 4) | Main input supply (3.75V–8V) | Bypass with ≥1µF capacitor; initiates charge when >150mV above VBAT; triggers UVLO if too low. |
| PROG (Pin 5) | Charge current programming and monitor | Voltage servoed to 1.21V in CC mode; IBAT = 1000 × VPROG/RPROG; used for gas gauging. |
| EN (Pin 6) | Enable/shutdown control | Pull >0.92V to enter shutdown (10µA ICC, <1µA battery drain); default active-low logic. |
Key Features
| Feature | Design Value |
|---|---|
| No external MOSFET or sense resistor | Reduces BOM count to two passive components (RPROG, input cap), simplifying layout and validation. |
| Thermal regulation with automatic current foldback | Maintains ≤115°C junction temperature without user intervention, enabling robust operation in sealed enclosures. |
| ACPR input status indicator | Eliminates need for external voltage comparator or µC ADC sampling to detect adapter presence. |
| ±0.6% 4.2V float voltage accuracy | Meets JEITA Li-Ion charging specifications and extends cycle life beyond 500 cycles. |
| 10µA shutdown supply current | Preserves battery capacity during long-term storage or device off-state (e.g., remote sensors). |
Applications
| Wireless Headsets | Digital Cameras |
|---|---|
Use Scenario: Compact wearable audio device with USB-rechargeable Li-Ion battery and space-constrained PCB. IC Role / Device Role / Timing Role: Primary linear charger managing CC/CV profile and thermal safety during rapid USB charging. Use Value: 2mm × 2mm DFN footprint and no external FET enable integration into sub-10cc enclosures while maintaining 600mA+ charge rate. | Use Scenario: Portable digital camera requiring reliable single-cell Li-Ion charging from USB or AC adapter. IC Role / Device Role / Timing Role: Standalone charger IC providing precise 4.2V termination and ACPR-driven power-path management. Use Value: ACPR signal allows firmware to disable camera subsystems when no input power is present, extending standby time. |
| Cellular Phones | Wireless PDAs |
Use Scenario: Entry-level smartphone with USB-only charging and thermal-aware battery management. IC Role / Device Role / Timing Role: Linear charger implementing JEITA-compliant CC/CV with automatic thermal derating. Use Value: Junction temperature regulation prevents thermal throttling during hot ambient conditions (e.g., 55°C car interiors). | Use Scenario: Legacy PDA with removable Li-Ion battery and dual-input (USB/wall) charging capability. IC Role / Device Role / Timing Role: Core battery management IC handling charge initiation, termination, and input source detection. Use Value: Undervoltage lockout (100–200mV hysteresis) prevents partial charging from weak or aging adapters, improving battery health. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear Li-Ion charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4054EDC-4.2#TRPBF | Fixed 4.2V output, 400mA max charge current, no ACPR pin, same DFN package. | Lacks input status monitoring; suitable only for simpler USB-powered devices without adapter detection needs. | Select when cost sensitivity outweighs need for ACPR and higher current; not drop-in due to lower ICHG and missing status pin. |
| BQ24075RGTR | TI part with integrated USB current limiting (100mA/500mA select), STAT pin instead of ACPR, 1.5A max, 16-pin QFN. | Requires more board area and additional configuration resistors; offers USB enumeration but different pinout and control logic. | Choose for USB compliance-critical designs needing D+/D− detection; not pin-compatible and demands layout revision. |
Compared with LTC4054EDC-4.2#TRPBF and BQ24075RGTR, the LTC4059AEDC#TRPBF uniquely balances high current (900mA), ultra-small footprint (2mm × 2mm), and dedicated input-status signaling (ACPR) - making it optimal for thermally constrained, dual-source portable devices where minimal component count and real-time power awareness are essential.
Availability
LTC4059AEDC#TRPBF is available at Aetrix Electronics and suitable for wireless headsets, digital cameras, and cellular phones requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for LTC4059AEDC#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains its high-performance analog IC portfolio, emphasizing precision, reliability, and application-specific integration for power management and signal conditioning.
The LTC4059AEDC#TRPBF belongs to Linear's standalone Li-Ion linear charger family, designed specifically for space- and thermal-constrained portable electronics that demand USB-compliant, self-contained battery charging with minimal external components.
FAQ
What is the function of the ACPR pin on the LTC4059AEDC#TRPBF?
The ACPR pin on the LTC4059AEDC#TRPBF is an open-drain output that pulls low when the VCC input voltage exceeds the undervoltage lockout threshold (typically 150mV above VBAT), indicating valid input power presence. It remains high-impedance otherwise, enabling simple microcontroller GPIO monitoring without external level-shifting or pull-up resistors. This functionality is exclusive to the LTC4059A variant and absent in the LTC4059.
How is charge current programmed on the LTC4059AEDC#TRPBF?
Charge current on the LTC4059AEDC#TRPBF is set using a single resistor (RPROG) connected from the PROG pin to GND. The relationship is IBAT = 1000 × VPROG/RPROG, where VPROG is regulated to 1.21V in constant-current mode. For example, RPROG = 2.43kΩ yields 500mA; RPROG = 1.21kΩ yields 1A (within 900mA max limit). The PROG pin voltage also serves as a real-time current monitor.
Does the LTC4059AEDC#TRPBF support charging Nickel-based batteries?
No, the LTC4059AEDC#TRPBF does not support Nickel-based battery charging. That capability is exclusive to the LTC4059 variant via its Li-CC pin, which disables constant-voltage regulation to operate as a constant-current source. The LTC4059AEDC#TRPBF replaces Li-CC with ACPR and lacks the voltage-mode disable function required for NiCd/NiMH charging.
What thermal design considerations apply to the LTC4059AEDC#TRPBF?
The LTC4059AEDC#TRPBF requires the exposed thermal pad (Pin 7) to be soldered to a PCB ground plane to achieve θJA = 60°C/W. Without this connection, thermal resistance rises significantly, limiting maximum sustainable charge current to <500mA at room temperature. Thermal regulation activates at ~115°C junction temperature, dynamically reducing IBAT to maintain safe operating conditions.
Can the LTC4059AEDC#TRPBF be used with USB 2.0 ports without violating current limits?
Yes, the LTC4059AEDC#TRPBF can be configured for USB 2.0 compliance by setting charge current ≤500mA using RPROG ≥ 2.43kΩ. Its input undervoltage lockout and thermal regulation ensure safe operation even if VCC sags during high-current USB negotiation. The IC draws only 25µA quiescent current when VCC is below UVLO, preventing parasitic loading of suspended USB ports.
LTC4059AEDC#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- -
- Charge Current - Max:
- 900mA
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 8V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LTC4059AEDC#TRPBF FAQ
1.How can I place an order for LTC4059AEDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4059AEDC#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC4059AEDC#TRPBF reliable?
The price and inventory of LTC4059AEDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4059AEDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4059AEDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4059AEDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4059AEDC#TRPBF?
LTC4059AEDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4059AEDC#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC4059AEDC#TRPBF?
For technical support, including LTC4059AEDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4059AEDC#TRPBF requirements.
6.How does Aetrix verify that LTC4059AEDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4059AEDC#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC4059AEDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4059AEDC#TRPBF?
All LTC4059AEDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4059AEDC#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC4059AEDC#TRPBF part is unused and in its original packaging.
Return procedure for LTC4059AEDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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