My Inquiry
My Account
Analog Devices Inc. LTC4061EDD-4.4#TRPBF
- Part No.:
- LTC4061EDD-4.4#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4061EDD-4.4#TRPBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,451
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC4061EDD-4.4 from Analog Devices (formerly Linear Technology) is a standalone linear Li-ion battery charger IC designed for single-cell 4.375V batteries, featuring ±0.4% float voltage accuracy, programmable up to 800mA charge current via external resistor, thermistor-based temperature qualification, and USB-compliant input operation (4.5V–8V). It integrates internal P-channel MOSFET, eliminating need for external sense resistor or blocking diode, and is used in portable consumer devices requiring compact, safe, and USB-powered charging.
For engineers reviewing the LTC4061EDD-4.4 datasheet, LTC4061EDD-4.4 pinout, LTC4061EDD-4.4 application, or LTC4061EDD-4.4 equivalent, key selection considerations include its 4.375V fixed float voltage, thermal regulation at ~105°C, SmartStart algorithm for battery-life extension, C/5 current-limit control, and 10-lead 3mm × 3mm DFN package with exposed thermal pad.
Technical Context
The LTC4061EDD-4.4 implements constant-current/constant-voltage (CC/CV) charging with three termination modes: time-based (via TIMER pin capacitor), current-based (via IDET resistor threshold), or user-controlled (via EN pin). Its internal thermal feedback loop dynamically reduces charge current above ~105°C junction temperature to prevent overheating without external intervention.
It incorporates NTC thermistor monitoring with hot/cold thresholds referenced to VCC (0.35× and 0.76×), Smart Pulsing error indication on CHRG pin (1.5Hz for NTC fault, 6Hz for defective battery), and undervoltage lockout (3.8V with 200mV hysteresis) plus VCC–VBAT differential lockout (190mV min).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Float Voltage | 4.375V ±0.4% - ensures precise Li-ion cell termination at optimal state-of-charge without overvoltage stress. |
| Max Charge Current | 800mA (RPROG = 1.25kΩ) - supports fast charging of 1100mAh batteries in ≤3 hours with C/10 termination. |
| Input Voltage Range | 4.5V to 8V - compliant with USB 2.0/3.0 host and adapter supplies; includes UVLO at 3.8V. |
| Thermal Regulation Threshold | ~105°C junction - automatically scales back charge current to maintain safe die temperature under high ambient or power dissipation. |
| Quiescent Current (Shutdown) | 20µA - minimizes system standby power loss and battery drain during inactive periods. |
| NTC Interface | Voltage-based thresholds (0.35×VCC hot / 0.76×VCC cold) - enables accurate battery temperature qualification without ADC or microcontroller. |
| Package | 10-lead 3mm × 3mm DFN, 0.75mm height, exposed thermal pad - provides low thermal resistance (θJA = 40°C/W) and space-efficient PCB layout. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed thermal pad (Pin 11 = GND), 0.75mm profile. Exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT (Pin 1) | Battery output and voltage regulation node | Delivers charge current and regulates final float voltage to 4.375V; connects directly to Li-ion cell anode. |
| NTC (Pin 2) | NTC thermistor interface input | Monitors battery temperature via voltage divider; suspends charging if outside 0°C–40°C range (configurable). |
| TIMER (Pin 3) | Termination mode select and timer programming | Selects time/current/user termination; CTIMER = 0.1µF sets 3-hour charge cycle. |
| ACPR (Pin 4) | Open-drain input supply present indicator | Signals valid VCC > VBAT + 190mV and > 3.8V; sinks 5mA for LED or logic-level detection. |
| CHRG (Pin 5) | Open-drain charge status indicator | Pull-down = charging active; high-Z = charge complete; 1.5Hz pulse = NTC fault; 6Hz = defective battery. |
| C/5 (Pin 6) | USB current limit enable input | Logic high = 100% PROG-set current; logic low = 20% current - enables USB 100mA/500mA compliance. |
| EN (Pin 7) | Charger enable/shutdown control | Logic high = shutdown (20µA IQ); logic low = enabled; internal 3MΩ pull-down defaults to active. |
| IDET (Pin 8) | Charge current detection threshold input | Sets termination threshold as fraction of PROG current (e.g., RDET = 1kΩ → IDETECT = 100mA). |
| PROG (Pin 9) | Charge current programming and monitoring | 1V reference in CC mode; ICHG = 1000 × VPROG/RPROG; also enables real-time current measurement. |
| VCC (Pin 10) | Positive input supply | Accepts 4.5V–8V; requires 1µF bypass capacitor; powers internal circuitry and FET gate drive. |
| GND (Pin 11, Exposed Pad) | Power and signal ground | Thermal and electrical ground; must be soldered to PCB copper area for θJA = 40°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| SmartStart Algorithm | Prevents unnecessary charging cycles by initiating full charge only when BAT < 4.275V (~80–90% SOC), extending cycle life. |
| Thermal Regulation | Dynamic current reduction above ~105°C junction temperature maintains reliability without external thermal management. |
| Programmable Termination | Three independent methods - time (capacitor), current (resistor), or user (EN pin) - enable flexible safety and runtime optimization. |
| NTC Temperature Qualification | Hot/cold thresholds scale with VCC (0.35×/0.76×), enabling robust battery thermal monitoring across input voltage variations. |
| Integrated Power FET | Internal P-channel MOSFET (RON = 375mΩ @ 4V) eliminates external components, reducing BOM count and PCB area. |
Applications
| Handheld Computers | Portable MP3 Players |
|---|---|
|
Use Scenario: Compact handheld device powered by single-cell Li-ion, charged via USB port with strict thermal and size constraints. IC Role / Device Role / Timing Role: Standalone linear charger managing CC/CV profile, float regulation, and temperature-qualified termination. Use Value: Enables USB-native charging without external FET or sense resistor; SmartStart prevents overcycling, preserving battery longevity. |
Use Scenario: Battery-powered audio player requiring silent, reliable charging with minimal bill-of-materials and no microcontroller involvement. IC Role / Device Role / Timing Role: Autonomous charge controller providing regulated 4.375V float, trickle-to-full transition, and automatic recharge. Use Value: 20µA shutdown current extends shelf life; C/5 pin allows seamless USB 100mA/500mA mode switching per host capability. |
| Digital Cameras | USB-Powered Portable Instruments |
|
Use Scenario: Intermittent-use imaging device needing rapid recharge between sessions while avoiding thermal throttling during burst operation. IC Role / Device Role / Timing Role: Thermal-regulated charger with NTC input ensuring safe charging across environmental conditions. Use Value: Internal thermal feedback maintains 800mA charge rate until die reaches ~105°C, maximizing speed without fan or heatsink. |
Use Scenario: Field-deployable test instrument powered by Li-ion and recharged from laptop USB ports or wall adapters. IC Role / Device Role / Timing Role: Dual-mode input supervisor (ACPR) and charge status indicator (CHRG) supporting both human-readable LED and system-level logic signaling. Use Value: ACPR and CHRG open-drain outputs provide direct LED drive or microcontroller interrupt signals without level-shifting components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standalone Li-ion linear charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TP4056 | Fixed 4.2V float voltage; no NTC input; no SmartStart; 1A max current; SOT-23-6 package. | Lacks temperature qualification and battery-health-aware charging; suitable only for basic, cost-sensitive designs without thermal safety requirements. | Choose TP4056 only if 4.2V float is acceptable and NTC monitoring is omitted; not drop-in due to different voltage, pinout, and feature set. |
| BQ24075 | 4.2V float; integrated LDO; USB D+/D− detection; I2C interface; 1.5A max; 16-pin QFN. | Requires microcontroller for configuration; adds system complexity but enables dynamic input current limiting and status reporting. | Choose BQ24075 when USB enumeration, telemetry, or higher current (>800mA) is required; not pin-compatible and needs firmware support. |
Compared with TP4056 and BQ24075, the LTC4061EDD-4.4 uniquely delivers 4.375V precision float, autonomous NTC-based thermal suspension, and SmartStart battery-preserving logic - all in a 10-pin DFN without software dependency.
Availability
LTC4061EDD-4.4 is available at Aetrix Electronics and suitable for portable medical monitors, handheld test equipment, and USB-rechargeable IoT sensors requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across –40°C to 85°C.
Supply support for LTC4061EDD-4.4 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, serving industrial, automotive, communications, and healthcare markets.
The LTC4061EDD-4.4 belongs to Linear's legacy standalone battery charger family, engineered for USB-powered portable electronics where simplicity, safety, and minimal external components are critical design priorities.
FAQ
What is the exact float voltage of the LTC4061EDD-4.4 and how accurate is it?
The LTC4061EDD-4.4 has a factory-trimmed float voltage of 4.375V with ±0.4% accuracy over –40°C to 85°C. This value is specified in the Electrical Characteristics table (VFLOAT = 4.358V to 4.392V at TA = 25°C; 4.35V to 4.4V over full temperature range). The precision ensures optimal Li-ion cell health and capacity retention without overvoltage risk.
Does the LTC4061EDD-4.4 support temperature-qualified charging, and how is it implemented?
Yes, the LTC4061EDD-4.4 supports temperature-qualified charging via its NTC (Pin 2) input. It uses voltage thresholds scaled to VCC (0.35×VCC for hot, 0.76×VCC for cold) to detect out-of-range battery temperatures. When triggered, charging pauses, the timer freezes, and CHRG pulses at 1.5Hz - all without external components or firmware.
How is charge current programmed on the LTC4061EDD-4.4, and what is the maximum achievable value?
Charge current is programmed using a single resistor (RPROG) from PROG (Pin 9) to GND. The formula is ICHG = 1000 × (1V / RPROG). With RPROG = 1.25kΩ, LTC4061EDD-4.4 delivers 800mA; minimum RPROG is ~1kΩ for ~1A. The PROG pin voltage remains at 1V in constant-current mode, enabling real-time current monitoring.
What termination methods does the LTC4061EDD-4.4 support, and how are they selected?
The LTC4061EDD-4.4 supports three termination methods: (1) time-based (connect CTIMER to TIMER pin), (2) current-based (connect RDET to IDET pin), and (3) user-controlled (tie TIMER to VCC and use EN pin). Selection is hardware-configured - no firmware or communication bus required - making it ideal for ultra-simple, autonomous systems.
What is the purpose of the SmartStart feature in the LTC4061EDD-4.4, and how does it improve battery life?
SmartStart in the LTC4061EDD-4.4 prevents unnecessary charging cycles by initiating a full charge only when BAT voltage falls below 4.275V (~80–90% SOC). If the battery is above this threshold at power-up, the IC enters standby mode. This reduces cumulative charge cycles and associated degradation, directly extending usable battery lifespan in intermittently used devices.
LTC4061EDD-4.4#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-4.4#TRPBF FAQ
1.How can I place an order for LTC4061EDD-4.4#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4061EDD-4.4#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-4.4#TRPBF reliable?
The price and inventory of LTC4061EDD-4.4#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-4.4#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4061EDD-4.4#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4061EDD-4.4#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4061EDD-4.4#TRPBF?
LTC4061EDD-4.4#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4061EDD-4.4#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-4.4#TRPBF?
For technical support, including LTC4061EDD-4.4#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4061EDD-4.4#TRPBF requirements.
6.How does Aetrix verify that LTC4061EDD-4.4#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4061EDD-4.4#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-4.4#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4061EDD-4.4#TRPBF?
All LTC4061EDD-4.4#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4061EDD-4.4#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-4.4#TRPBF part is unused and in its original packaging.
Return procedure for LTC4061EDD-4.4#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC4061EDD-4.4#TRPBF Tags
-
BQ21040DBVR
Texas Instruments
-
MCP73812T-420I/OT
Microchip Technology
-
MCP73831T-2ACI/OT
Microchip Technology
-
MCP73832T-2ACI/OT
Microchip Technology
-
MCP73831T-2DCI/OT
Microchip Technology
-
MCP73832T-2DCI/OT
Microchip Technology
-
MCP73831T-2ATI/OT
Microchip Technology
-
MCP73832T-2ATI/OT
Microchip Technology
-
MCP73831T-5ACI/OT
Microchip Technology
-
MCP73832T-2ACI/MC
Microchip Technology
-
MCP73831T-2ACI/MC
Microchip Technology
-
MCP73831T-2ATI/MC
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
