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Analog Devices Inc. LTC4053EDD-4.2#TRPBF
- Part No.:
- LTC4053EDD-4.2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4053EDD-4.2#TRPBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,471
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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 a P-channel power MOSFET, delivers up to 500 mA programmable charge current with ±7% accuracy, regulates float voltage at 4.20 V ±1%, and features thermal regulation to limit junction temperature to 105°C - enabling safe high-rate charging in compact handheld systems like MP3 players and digital cameras.
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 its 3 mm × 3 mm DFN-10 package with exposed thermal pad, C/10 charge termination detection, NTC-based temperature-qualified charging, and absence of external sense resistor or blocking diode requirements.
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. Its PROG pin servo maintains 1.50 V during CC mode, while internal amplifiers CA, VA, and TA dynamically arbitrate charge current based on battery voltage, die temperature, and programmed current setpoint.
Thermal regulation operates autonomously: when junction temperature approaches 105°C, TA loop reduces charge current without interrupting charging, preserving system reliability under high ambient or high-power conditions. The NTC input supports battery temperature qualification via external 10 kΩ thermistor and precision bias resistor, with hot/cold thresholds at ~50°C and ~0°C, respectively, and built-in hysteresis to prevent oscillation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage | 4.20 V ±1% - ensures precise Li-Ion cell termination to maximize cycle life and safety compliance. |
| Max Charge Current | 500 mA (RPROG = 3 kΩ) - programmable via single resistor; ±7% accuracy enables predictable charge time estimation. |
| Thermal Regulation Threshold | Junction temperature limited to 105°C - prevents thermal runaway and allows PCB-level power density optimization without forced cooling. |
| C/10 Termination Detection | 50 mA output current threshold (at RPROG = 3 kΩ) - provides reliable end-of-charge signal for host microcontroller gas gauging or LED indication. |
| Shutdown Supply Current | 25 µA - minimizes battery drain during idle, extending standby time in always-on portable devices. |
| NTC Input Range | Supports 10 kΩ NTC with RHOT = 4.1 kΩ (1%) - enables accurate battery temperature monitoring across –10°C to +60°C range. |
| Input Voltage Range | 4.25 V to 6.5 V - compatible with USB 2.0 (5 V ±5%) and common wall adapters, with UVLO hysteresis of 200 mV. |
Pinout & Package
Package: 10-lead, 3 mm × 3 mm × 0.75 mm plastic DFN with exposed thermal pad (Pin 11 = GND, must be soldered to PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHRG | Open-drain charge status output | Pulled low during active charge; transitions to 30 µA weak pull-down at C/10; high-impedance after timeout - enables 3-state microcontroller interface. |
| VCC | Positive input supply | Accepts 4.25–6.5 V; powers internal circuitry and gate drive; requires ≥4.7 µF ceramic bypass to GND. |
| FAULT | Open-drain fault status output | Pulled low on defective battery (VBAT < 2.48 V for ¼ timer period) or NTC out-of-range - latched until cleared by SHDN toggle or VCC cycle. |
| TIMER | Timer capacitor connection | CTIMER sets total charge time: t = 3 hr × (CTIMER / 0.1 µF); shorting to GND disables timer. |
| GND | Ground reference and thermal path | Common return for all signals; exposed pad (Pin 11) is GND and mandatory for thermal performance (θJA = 40°C/W). |
| ACPR | Open-drain AC present indicator | Pulled low when VCC > UVLO threshold and VCC − VBAT > 35 mV - signals valid input power presence to system controller. |
| BAT | Battery charge output | Delivers regulated current to single-cell Li-Ion; internal 4.2 V reference divider; requires ≥1 µF bypass with 1 Ω series resistor for stability. |
| SHDN | Active-low shutdown control | Pulling to GND reduces ICC to 25 µA and IBAT to <3 µA; must be pulled up to VCC for normal operation. |
| PROG | Charge current programming & monitor | 1.50 V servo point for CC mode; IBAT = (VPROG/RPROG) × 1000 - enables real-time current measurement for fuel gauging. |
| NTC | NTC thermistor input | Monitors battery temperature via external 10 kΩ NTC; triggers hold mode if voltage falls below 2.5 V (hot) or rises above 4.375 V (cold). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-channel MOSFET | Eliminates need for external pass transistor, reducing BOM count and PCB area in space-constrained designs. |
| Thermal regulation | Automatically scales charge current to maintain TJ ≤ 105°C - enables aggressive charging without thermal derating or heatsink. |
| Trickle charge mode | Activates at VBAT < 2.48 V (±100 mV hysteresis) with 10% reduced current - safely recovers deeply discharged cells before fast charge. |
| Automatic recharge | Resumes charging when VBAT drops below 4.035 V - maintains full capacity without host intervention in intermittently powered devices. |
| USB-compatible input | Operates directly from 5 V USB port with undervoltage lockout at 4.25 V - simplifies power architecture in consumer electronics. |
Applications
| Smartphone Peripheral Charging | Digital Camera Power Management |
|---|---|
Use Scenario: Charging auxiliary battery packs for smartphone-connected accessories (e.g., Bluetooth headsets, portable speakers) via USB cable. IC Role / Device Role / Timing Role: Standalone Li-Ion charger managing CC/CV profile, thermal foldback, and NTC-based temperature qualification. Use Value: Enables compact, self-contained charging without MCU coordination; 25 µA shutdown current extends accessory standby time. | Use Scenario: Recharging internal Li-Ion battery in DSLR or mirrorless camera bodies during tethered operation or docked charging. IC Role / Device Role / Timing Role: Primary battery management IC providing precise 4.20 V float regulation, C/10 termination, and overtemperature hold. Use Value: Prevents battery overvoltage stress during long-duration studio use; thermal regulation avoids shutdown during burst shooting sequences. |
| USB-Powered Handheld Computer | MP3 Player Battery System |
Use Scenario: Integrated charging solution in ruggedized industrial handheld computers used in field service applications. IC Role / Device Role / Timing Role: USB-powered linear charger with automatic recharge, trickle charge recovery, and robust NTC monitoring for wide-temperature deployment. Use Value: Ensures reliable battery conditioning across –20°C to +60°C ambient; 105°C thermal limit protects against enclosure heat buildup. | Use Scenario: Portable audio player requiring silent, low-noise charging with minimal external components and no inductor. IC Role / Device Role / Timing Role: Low-EMI linear charger delivering 500 mA CC current and 4.20 V CV regulation with integrated MOSFET. Use Value: Eliminates switching noise that could interfere with analog audio paths; 3 mm × 3 mm DFN footprint saves board space in ultra-thin form factors. |
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 |
|---|---|---|---|
| BQ24075RGTR | Fixed 4.2 V regulation, 1.5 A max charge current, integrated LDO for system power, no thermal regulation loop - relies on external thermal shutdown. | Designed for dual-role (charge + system power) in smartphones; lacks autonomous thermal foldback for sustained high-current charging. | Select BQ24075RGTR when system power delivery alongside charging is required; LTC4053EDD-4.2 preferred where thermal regulation and minimal external parts are critical. |
| MCP73831T-2DCI/OT | Fixed 4.2 V, 500 mA max, no NTC input, no C/10 output, smaller SOT-23-5 package - simpler feature set, lower cost. | Targeted at cost-sensitive, low-complexity applications (e.g., basic Bluetooth earbuds); missing temperature qualification and precise charge status signaling. | Choose MCP73831T-2DCI/OT for ultra-low-cost, space-constrained designs without thermal or battery health monitoring needs. |
Compared with BQ24075RGTR and MCP73831T-2DCI/OT, the LTC4053EDD-4.2 uniquely combines autonomous thermal regulation, NTC-based temperature qualification, and C/10 status output in a 3 mm × 3 mm DFN - making it optimal for USB-powered portable devices demanding robust battery safety and minimal external components.
Availability
LTC4053EDD-4.2 is available at Aetrix Electronics and suitable for USB-powered handheld computers, digital cameras, and MP3 players requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC4053EDD-4.2 belongs to Linear's legacy LTC® battery management product line, engineered specifically for compact, USB-powered portable electronics requiring precise, thermally robust, and fully integrated Li-Ion charging solutions.
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 verified across process corners and temperature extremes, ensuring consistent Li-Ion cell termination critical for cycle life and safety compliance.
Does the LTC4053EDD-4.2 require an external MOSFET or sense resistor?
No, the LTC4053EDD-4.2 does not require an external MOSFET or sense resistor. It integrates a P-channel power MOSFET and uses a proprietary current-sensing architecture referenced to the PROG pin, eliminating both components and reducing total solution size and cost - a key differentiator versus discrete charger implementations.
How does thermal regulation function in the LTC4053EDD-4.2 during high ambient temperature operation?
In the LTC4053EDD-4.2, thermal regulation activates when junction temperature approaches 105°C, automatically reducing charge current to maintain TJ ≤ 105°C. This occurs without interrupting charging or requiring host intervention, allowing continuous safe operation even in sealed enclosures or high-ambient environments like automotive cabins or industrial handhelds.
Can the LTC4053EDD-4.2 be used with wall adapter input in addition to USB?
Yes, the LTC4053EDD-4.2 supports both USB (5 V) and wall adapter inputs (up to 6.5 V). Its input UVLO threshold is 4.25 V with 200 mV hysteresis, and it tolerates VCC up to 7 V absolute maximum. External circuitry (e.g., OR-ing FETs) can seamlessly combine multiple sources without modifying the LTC4053EDD-4.2 configuration.
What is the purpose and behavior of the NTC pin on the LTC4053EDD-4.2?
The NTC pin on the LTC4053EDD-4.2 accepts a voltage divider formed by a 10 kΩ NTC thermistor and 1% RHOT resistor to monitor battery temperature. It suspends charging if the NTC voltage falls below 2.5 V (hot condition) or rises above 4.375 V (cold condition), freezing the timer and pulling FAULT low - resuming only when temperature returns to the valid window.
LTC4053EDD-4.2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC4053EDD-4.2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4053EDD-4.2#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 LTC4053EDD-4.2#TRPBF reliable?
The price and inventory of LTC4053EDD-4.2#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4053EDD-4.2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4053EDD-4.2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4053EDD-4.2#TRPBF?
LTC4053EDD-4.2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4053EDD-4.2#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 LTC4053EDD-4.2#TRPBF?
For technical support, including LTC4053EDD-4.2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4053EDD-4.2#TRPBF requirements.
6.How does Aetrix verify that LTC4053EDD-4.2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4053EDD-4.2#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 LTC4053EDD-4.2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4053EDD-4.2#TRPBF?
All LTC4053EDD-4.2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4053EDD-4.2#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 LTC4053EDD-4.2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4053EDD-4.2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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