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Analog Devices Inc. LTC4061EDD#TRPBF
- Part No.:
- LTC4061EDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4061EDD#TRPBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,247
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Product details
Overview
LTC4061EDD#TRPBF from Analog Devices (formerly Linear Technology) is a standalone linear Li-ion battery charger IC for single-cell 4.2V batteries, featuring ±0.35% float voltage accuracy, programmable charge current up to 1A via external resistor, NTC thermistor input for temperature-qualified charging, and thermal regulation at 105°C. It operates directly from USB power (4.3V–8V), supports C/5 current limiting, and targets portable consumer devices requiring compact, safe, and USB-compliant charging.
For engineers reviewing the LTC4061EDD#TRPBF datasheet, LTC4061EDD#TRPBF pinout, LTC4061EDD#TRPBF application, or LTC4061EDD#TRPBF equivalent, key selection considerations include its 10-lead DFN package with exposed pad, dual termination modes (timer- or current-based), SmartStart algorithm for battery life extension, 20µA shutdown quiescent current, and integrated MOSFET eliminating external sense resistor or blocking diode.
Technical Context
The LTC4061EDD#TRPBF implements a constant-current/constant-voltage (CC/CV) charging algorithm with internal P-channel MOSFET and no external sense resistor. Its thermal regulation loop actively reduces charge current when die temperature approaches 105°C, enabling robust operation under high ambient or high-power conditions without external thermal management.
Termination is configurable via TIMER pin: capacitor-to-ground enables time-based termination (e.g., 3 hours with 0.1µF), ground enables current-based termination using IDET pin threshold, and VCC enables user-controlled termination. NTC monitoring uses dual comparators (0.35×VCC hot / 0.76×VCC cold) with ~2°C hysteresis and fault pulsing at 1.5Hz or 6Hz depending on condition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage Accuracy | ±0.35% over –40°C to 85°C - ensures reliable 4.2V float voltage control critical for Li-ion cell longevity and safety. |
| Max Charge Current | Up to 1A programmable via PROG pin resistor - supports fast charging of 1100mAh batteries in <3 hours. |
| Input Voltage Range | 4.3V to 8V - compliant with USB 2.0/3.0 host and adapter supplies while supporting higher-input wall adapters. |
| Shutdown Quiescent Current | 20µA - minimizes system standby power loss and extends host device battery life when charger is inactive. |
| Thermal Regulation Threshold | 105°C junction temperature - dynamically throttles charge current to prevent overheating without external thermal sensors. |
| NTC Input Thresholds | 0.35×VCC (hot), 0.76×VCC (cold), 0.016×VCC (disable) - enables precise, ratiometric battery temperature qualification across supply variations. |
| Timer Termination Accuracy | ±15% over temperature - provides predictable 3-hour (0.1µF) or scalable timing for consistent full-charge cycles. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 11 = GND), 0.75mm profile, θJA = 40°C/W - requires soldering of exposed pad to PCB for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT (1) | Charge current output & regulated voltage node | Direct connection to battery anode; regulates final float voltage to 4.2V with ±0.35% accuracy; handles up to 1A continuous current. |
| NTC (2) | NTC thermistor interface input | Ratiometric comparator input for battery temperature sensing; suspends charging if outside 0°C–40°C range (configurable); disables with <0.016×VCC. |
| TIMER (3) | Termination mode select & timer programming | Selects termination method: capacitor-to-GND = time-based, grounded = current-based, tied to VCC = user-controlled; sets 3-hour default with 0.1µF. |
| ACPR (4) | Open-drain AC present status output | Logic-level indicator (pull-down/high-Z) signaling valid input supply - active only when VCC > VBAT + 190mV and > VUVLO (3.8V). |
| CHRG (5) | Open-drain charge status output | Three-state indicator: pull-down = charging, high-Z = charge complete, 1.5Hz/6Hz pulse = NTC fault or defective battery detection. |
| C/5 (6) | USB current limit enable input | Logic-high = 100% PROG-set current; logic-low = 20% PROG-set current; internal 3MΩ pull-down defaults to low-current USB mode. |
| EN (7) | Charger enable/shutdown control | Logic-high = shutdown (ICC < 50µA, IBAT drain < 2µA); logic-low or floating = enabled; internal 3MΩ pull-down ensures default operation. |
| IDET (8) | Current detection threshold program | Sets IDETECT threshold (e.g., 100mA) via resistor to GND; CHRG transitions to high-Z when IBAT falls below this value in CV mode. |
| PROG (9) | Charge current programming & monitoring | 1V reference in CC mode; charge current = 1000 × VPROG/RPROG; real-time current measurement possible by monitoring VPROG. |
| VCC (10) | Positive input supply | Accepts 4.3V–8V input; powers internal circuitry and BAT path; requires 1µF bypass capacitor for stability. |
| GND (11) | Power and signal ground (exposed pad) | Thermal and electrical ground; must be soldered to large PCB copper area to achieve specified θJA = 40°C/W and ensure reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-channel MOSFET | Eliminates need for external blocking diode or sense resistor - reduces BOM count, PCB area, and forward voltage drop losses. |
| SmartStart™ Algorithm | Prevents unnecessary charging cycles by initiating full charge only when BAT < 4.1V (~80–90% SOC) - extends cycle life of Li-ion cells. |
| Programmable Dual Termination | Supports time-based (capacitor), current-based (IDET resistor), or user-controlled (EN pin) termination - enables design flexibility across product variants. |
| Thermal Regulation | Automatically scales back charge current above 105°C junction temperature - allows aggressive thermal design without risk of IC damage or thermal runaway. |
| NTC Temperature Monitoring | Dual-threshold ratiometric input (0.35×/0.76×VCC) with hysteresis - provides accurate, supply-independent battery temperature qualification for safe charging. |
| Low-Power Shutdown | 20µA supply current and <5µA battery drain in shutdown - preserves host battery during storage or long idle periods. |
Applications
| Handheld Computers | Portable MP3 Players |
|---|---|
Use Scenario: Compact tablet or ruggedized PDA with single-cell Li-ion battery and USB-powered charging. IC Role / Device Role / Timing Role: Standalone CC/CV charger managing full charge cycle, temperature qualification, and USB current compliance. Use Value: Enables direct USB charging without external FET or sense resistor, reducing solution size by >30% and eliminating thermal derating concerns via die-temperature regulation. | Use Scenario: Battery-powered audio player requiring long runtime, safe charging, and minimal standby drain. IC Role / Device Role / Timing Role: Primary battery management IC handling trickle-to-full charge, SmartStart-based recharge, and NTC-monitored thermal safety. Use Value: Extends usable battery cycles by 25%+ through SmartStart and automatic 4.1V-recharge threshold, while 20µA shutdown current adds >1 week to shelf-life. |
| Digital Cameras | USB-Powered Portable Instruments |
Use Scenario: DSLR or mirrorless camera with removable Li-ion pack and field-charging via USB or AC adapter. IC Role / Device Role / Timing Role: High-accuracy 4.2V charger with thermistor input to prevent charging in extreme ambient temperatures. Use Value: Prevents battery degradation or thermal hazard in outdoor use (–20°C to 60°C) via NTC hold-mode activation and ±0.35% voltage regulation. | Use Scenario: Handheld test equipment (e.g., multimeter, oscilloscope) needing reliable USB charging and low standby leakage. IC Role / Device Role / Timing Role: USB-compliant charger with C/5 input for 100mA/500mA mode switching and EN-controlled shutdown for firmware-managed power states. Use Value: Supports dual-role USB operation (device/peripheral) with seamless transition between charging and host power modes, minimizing firmware complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standalone Li-ion charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TP4056 | Fixed 4.2V float, no NTC input, no thermal regulation, 1A max, no C/5 or SmartStart | Lower-cost basic charging only; unsuitable for temperature-critical or USB-C/5-aware designs | Choose TP4056 only for cost-sensitive, non-temperature-qualified applications where thermal headroom is guaranteed. |
| BQ24075 | Integrated LDO, USB D+/D− detection, 1.5A max, I²C programmable, no SmartStart, different termination logic | Requires microcontroller interface; better for systems needing dynamic charge parameter updates or USB enumeration | Choose BQ24075 when USB detection, higher current, or firmware configurability outweighs need for autonomous SmartStart and NTC simplicity. |
Compared with TP4056 and BQ24075, the LTC4061EDD#TRPBF uniquely combines autonomous NTC qualification, die-temperature regulation, SmartStart battery preservation, and USB C/5 compatibility in a pin-compatible 10-lead DFN - making it optimal for embedded USB-charged devices requiring zero-firmware, safety-certifiable charging.
Availability
LTC4061EDD#TRPBF is available at Aetrix Electronics and suitable for handheld computers, portable MP3 players, and digital cameras requiring stable component supply, long-lifecycle support, and automotive-grade reliability validation.
Supply support for LTC4061EDD#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC4061EDD#TRPBF belongs to ADI's Power Management portfolio, specifically the Linear Technology legacy battery charger family, designed for space-constrained, USB-powered portable electronics requiring autonomous, safe, and thermally robust Li-ion charging without microcontroller dependency.
FAQ
What is the function of the TIMER pin on the LTC4061EDD#TRPBF?
The TIMER pin on the LTC4061EDD#TRPBF selects the charge termination method: connecting a capacitor (e.g., 0.1µF) to ground enables time-based termination (3 hours), grounding enables current-based termination using the IDET pin, and tying to VCC enables user-controlled termination via the EN pin. The LTC4061EDD#TRPBF uses this pin to configure its core charging behavior without external logic.
How does the LTC4061EDD#TRPBF implement temperature-qualified charging?
The LTC4061EDD#TRPBF uses the NTC pin to monitor battery temperature via a ratiometric circuit comparing NTC voltage to 0.35×VCC (hot threshold) and 0.76×VCC (cold threshold). If either threshold is violated, charging suspends, the timer freezes, and the CHRG pin pulses at 1.5Hz. Grounding the NTC pin disables this feature. The LTC4061EDD#TRPBF requires no external op-amps or ADCs for this functionality.
Can the LTC4061EDD#TRPBF charge a battery directly from a USB port?
Yes, the LTC4061EDD#TRPBF is explicitly designed for USB power sources, operating from 4.3V to 8V input and supporting USB C/5 current limiting via the C/5 pin. It meets USB power specifications with built-in undervoltage lockout (3.8V), ACPR logic output indicating supply presence, and automatic current scaling - enabling direct USB port connection without additional regulators or protection circuitry. The LTC4061EDD#TRPBF delivers up to 1A charge current in this configuration.
What is SmartStart™ and how does it benefit battery life in the LTC4061EDD#TRPBF?
SmartStart™ is a proprietary algorithm in the LTC4061EDD#TRPBF that initiates a full charge cycle only when the battery voltage falls below 4.1V (~80–90% state-of-charge), preventing unnecessary top-off cycles. This reduces cumulative stress on the Li-ion cell, extending usable cycle life by up to 25%. The LTC4061EDD#TRPBF executes SmartStart autonomously at power-up or wake-from-shutdown without firmware intervention.
Does the LTC4061EDD#TRPBF require an external MOSFET or current-sense resistor?
No, the LTC4061EDD#TRPBF integrates a P-channel power MOSFET and uses the PROG pin's 1V reference to set charge current via a single external resistor - eliminating the need for an external sense resistor, blocking diode, or discrete MOSFET. This simplifies layout, reduces component count, and improves efficiency. All critical charging functions, including regulation and termination, are handled internally by the LTC4061EDD#TRPBF.
LTC4061EDD#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:
- Current, Timer
- Fault Protection:
- Over Temperature
- Charge Current - Max:
- 1A
- 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:
- 10-DFN (3x3)
LTC4061EDD#TRPBF FAQ
1.How can I place an order for LTC4061EDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4061EDD#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 LTC4061EDD#TRPBF reliable?
The price and inventory of LTC4061EDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4061EDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4061EDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4061EDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4061EDD#TRPBF?
LTC4061EDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4061EDD#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 LTC4061EDD#TRPBF?
For technical support, including LTC4061EDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4061EDD#TRPBF requirements.
6.How does Aetrix verify that LTC4061EDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4061EDD#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 LTC4061EDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4061EDD#TRPBF?
All LTC4061EDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4061EDD#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 LTC4061EDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC4061EDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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