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Analog Devices Inc. LTC4053EDD-4.2#PBF
- Part No.:
- LTC4053EDD-4.2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4053EDD-4.2#PBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:192
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Product details
Overview
LTC4053EDD-4.2 from Analog Devices (formerly Linear Technology) is a standalone linear lithium-ion battery charger IC designed for USB-powered portable devices. It integrates an on-chip P-channel MOSFET, delivers up to 500 mA charge current with ±7% accuracy, regulates float voltage at 4.20 V ±1%, and features thermal regulation to limit junction temperature to 105°C. It is used in MP3 players, digital cameras, and handheld computers requiring single-cell Li-Ion charging directly from 5 V USB.
For engineers reviewing the LTC4053EDD-4.2 datasheet, LTC4053EDD-4.2 pinout, LTC4053EDD-4.2 application, or LTC4053EDD-4.2 equivalent, key selection considerations include programmable charge current via PROG resistor, C/10 termination detection, NTC thermistor-based temperature qualification, AC present status output, and thermal foldback behavior under high ambient or power dissipation conditions.
Technical Context
The LTC4053EDD-4.2 implements a three-mode control architecture-constant-current (CC), constant-voltage (CV), and constant-temperature (CT)-with priority-based feedback loops. The CC loop servos the PROG pin to 1.5 V; the CV loop maintains BAT at 4.20 V via internal 2.485 V reference and resistor divider; the CT loop activates when die temperature approaches 105°C, reducing charge current to hold junction temperature.
It supports trickle charge below 2.48 V battery voltage, automatic recharge at 4.035 V, and programmable timer termination using external capacitor on TIMER pin (e.g., 0.1 µF = 3 hours). All status outputs-CHRG, FAULT, and ACPR-are open-drain with defined pull-down strength and logic thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBAT Float Voltage | 4.20 V ±1% - ensures precise Li-Ion cell termination without overvoltage stress |
| ICHG Max | 500 mA (RPROG = 3 kΩ) - programmable via single resistor; ±7% accuracy over temp |
| TJ Limit | 105°C - thermal regulation automatically reduces charge current to prevent die overheating |
| VUVLO | 4.25 V (rising), 4.05 V (falling) - prevents operation outside safe USB input range |
| ISHDN | 25 µA - ultra-low shutdown supply current preserves system standby time |
| C/10 Detection | 50 mA (RPROG = 3 kΩ) - latches CHRG pin to indicate near-end-of-charge condition |
| NTC Input Range | 0°C to 50°C qualification - hot/cold thresholds set by external 10 kΩ NTC + 1% RHOT resistor |
Pinout & Package
Package: 10-lead, 3 mm × 3 mm, 0.75 mm profile DFN (DD package); exposed pad (Pin 11) is GND and must be soldered to PCB for thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHRG | Open-drain charge status | Pulled low during active charge; transitions to 30 µA weak pull-down at C/10; high-Z at timeout |
| VCC | Input supply (4.25–6.5 V) | Accepts USB or wall adapter; includes UVLO and sleep mode entry when ≤4 V or within 35 mV of VBAT |
| FAULT | Open-drain fault indicator | Pulled low for defective battery (VBAT <2.48 V after ¼ timer) or NTC out-of-range condition |
| TIMER | Timer capacitor connection | CTIMER sets total charge time: Time (hr) = (CTIMER × 3 hr)/0.1 µF; shorted to GND disables timer |
| GND | Power and signal ground | Shared with exposed thermal pad; mandatory PCB soldering for thermal integrity |
| ACPR | Open-drain AC present flag | Pulled low when VCC > UVLO threshold and VCC − VBAT > 35 mV; high-Z otherwise |
| BAT | Battery charge output | Delivers regulated current to Li-Ion cell; includes internal 4.20 V reference divider and sleep-mode isolation |
| SHDN | Shutdown control input | Pulled low disables charger (ICC = 25 µA); requires ≥0.6 V for normal operation |
| PROG | Charge current programming | 1.5 V servo point for ICHG = 1500 V/RPROG; also enables real-time current monitoring |
| NTC | Thermistor interface input | Monitors battery temperature via external 10 kΩ NTC; suspends charge if outside 0°C–50°C window |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-MOSFET | Eliminates need for external pass transistor, sense resistor, or blocking diode - reduces BOM to 3 passive components |
| Thermal Regulation | Automatically scales charge current to maintain TJ ≤ 105°C - enables aggressive layout without derating for worst-case ambient |
| Trickle-to-Fast Transition | Initiates 50 mA trickle charge if VBAT < 2.48 V; transitions to full current once threshold exceeded - protects deeply discharged cells |
| C/10 Charge Termination | Detects 10% of programmed current and asserts weak-pull CHRG state - provides reliable end-of-charge signal for host microcontroller |
| NTC Temperature Qualification | Supports cold/hot cutoff at ~0°C and ~50°C using standard 10 kΩ NTC - prevents charging outside safe battery thermal envelope |
Applications
| USB-Powered Portable Audio | Digital Imaging Devices |
|---|---|
Use Scenario: MP3 player charges from PC USB port while maintaining playback capability through system load path. IC Role / Device Role / Timing Role: Standalone Li-Ion charger managing CC/CV profile, thermal foldback, and USB compliance without host intervention. Use Value: Enables direct USB 5 V charging at 500 mA with ±1% voltage accuracy and automatic thermal derating - eliminates need for separate power management IC. | Use Scenario: Compact digital camera uses single-cell Li-Ion battery and requires fast, safe charging during brief downtime between photo sessions. IC Role / Device Role / Timing Role: Battery charge controller providing programmable timer termination, C/10 detection, and NTC-based temperature safety lockout. Use Value: Guarantees full charge in ≤3 hours (via 0.1 µF TIMER cap), prevents overcharge via 4.20 V ±1% regulation, and halts charging if battery exceeds 50°C. |
| Handheld Computing Terminals | Charging Docks & Cradles |
Use Scenario: Ruggedized handheld computer operates in variable ambient temperatures and must sustain battery health across industrial environments. IC Role / Device Role / Timing Role: Thermal-aware battery manager enforcing 105°C junction limit and supporting NTC-coupled battery pack sensing. Use Value: Maintains consistent charge rate in 0°C–40°C ambient while automatically reducing current above 40°C - extends battery cycle life and avoids thermal shutdown events. | Use Scenario: Docking station simultaneously powers and recharges multiple portable devices via shared USB upstream connection. IC Role / Device Role / Timing Role: Dedicated charge controller per device slot, coordinating ACPR status, CHRG signaling, and independent timer settings. Use Value: Provides per-port charge status (ACPR/CHRG/FAULT), supports automatic recharge at 4.035 V, and isolates faults to individual bays - improves dock reliability and user diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar lithium-ion linear charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP73831T-2DCI/OT | Fixed 4.2 V float, 500 mA max, no NTC input, no thermal regulation, SOT-23-5 | Lacks temperature qualification and thermal foldback - suitable only for controlled-environment consumer devices | Select when cost and footprint are critical and thermal/NTC safety is managed externally or unnecessary |
| BQ24075TRGTR | 4.2 V float, 1.5 A max, integrated LDO, USB-compatible, no thermal regulation, 16-pin QFN | Higher current capability but no die-temperature limiting - requires external thermal design margin | Select when higher charge rate is required and board-level thermal management is implemented |
Compared with MCP73831T-2DCI/OT and BQ24075TRGTR, the LTC4053EDD-4.2 uniquely combines programmable current, on-die thermal regulation, and NTC qualification in a compact DFN - making it optimal for space-constrained, thermally variable USB-powered systems where battery safety cannot be delegated to system-level controls.
Availability
LTC4053EDD-4.2 is available at Aetrix Electronics and suitable for USB-powered portable audio, digital imaging, handheld computing, and charging dock applications requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for LTC4053EDD-4.2 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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC4053 product line delivers highly integrated, thermally robust linear Li-Ion chargers for space- and safety-critical portable electronics - emphasizing USB compatibility, precision regulation, and autonomous thermal protection without host firmware dependency.
FAQ
What is the exact float voltage regulation accuracy of the LTC4053EDD-4.2?
The LTC4053EDD-4.2 regulates battery float voltage at 4.20 V with ±1% accuracy over the full operating temperature range (–40°C to 85°C). This specification is guaranteed by design and confirmed in the Electrical Characteristics table under VBAT, with min/typ/max values of 4.158 V / 4.200 V / 4.242 V at TA = 25°C and across temperature.
How does thermal regulation function in the LTC4053EDD-4.2 during high ambient temperature operation?
The LTC4053EDD-4.2 monitors its own junction temperature and automatically reduces charge current when TJ approaches 105°C. This constant-temperature mode overrides constant-current mode to hold die temperature at ~105°C, preventing thermal stress. The PROG pin voltage remains proportional to actual delivered current, enabling real-time monitoring even during thermal foldback.
Can the LTC4053EDD-4.2 be used without an NTC thermistor?
Yes - the NTC function is optional and can be disabled by grounding the NTC pin. When disabled, temperature qualification is inactive, and charging proceeds normally based on voltage and timer conditions only. However, disabling NTC removes cold/hot charge suspension, so this configuration is appropriate only in thermally controlled environments where battery temperature remains within safe limits.
What is the minimum VCC undervoltage lockout hysteresis for the LTC4053EDD-4.2?
The LTC4053EDD-4.2 has a VCC undervoltage lockout (UVLO) hysteresis of 200 mV, with a rising threshold of 4.25 V and a falling threshold of 4.05 V. This ensures stable enable/disable behavior during marginal USB supply conditions and prevents oscillation near the UVLO boundary.
How is charge current monitored in real time using the LTC4053EDD-4.2?
Charge current is monitored in real time via the PROG pin: IBAT = (VPROG / RPROG) × 1000. During constant-current mode, VPROG is servoed to 1.5 V; during thermal foldback or CV mode, VPROG drops proportionally, allowing accurate measurement of actual delivered current without additional sensing components.
LTC4053EDD-4.2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- Over Temperature
- Charge Current - Max:
- -
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 6.5V
- Interface:
- USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC4053EDD-4.2#PBF FAQ
1.How can I place an order for LTC4053EDD-4.2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4053EDD-4.2#PBF 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 LTC4053EDD-4.2#PBF reliable?
The price and inventory of LTC4053EDD-4.2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4053EDD-4.2#PBF is usually 5 days.
3.What payment methods are accepted for LTC4053EDD-4.2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4053EDD-4.2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4053EDD-4.2#PBF?
LTC4053EDD-4.2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4053EDD-4.2#PBF 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 LTC4053EDD-4.2#PBF?
For technical support, including LTC4053EDD-4.2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4053EDD-4.2#PBF requirements.
6.How does Aetrix verify that LTC4053EDD-4.2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4053EDD-4.2#PBF 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 LTC4053EDD-4.2#PBF meets industry standards.
7.What is the process for return or replacement of LTC4053EDD-4.2#PBF?
All LTC4053EDD-4.2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4053EDD-4.2#PBF, 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 LTC4053EDD-4.2#PBF part is unused and in its original packaging.
Return procedure for LTC4053EDD-4.2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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