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Analog Devices Inc. LTM8061EV-8.2#PBF
- Part No.:
- LTM8061EV-8.2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 77-BLGA
- Datasheet:
-
LTM8061EV-8.2#PBF.pdf
- Description:
- IC BATT CHG LI-ION 2CELL 77LGA
- Quantity:
- Payment:
- Shipping:
Inventory:168
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Product details
Overview
LTM8061EV-8.2#PBF from Analog Devices (formerly Linear Technology) is a standalone 32V input, 2A µModule Li-ion battery charger optimized for two-cell (2S) packs with fixed 8.2V float voltage, 0.5% float accuracy, C/10 or timer-based termination, and integrated reverse-input protection. It delivers constant-current/constant-voltage charging in industrial handheld instruments and professional camera systems.
For engineers reviewing the LTM8061EV-8.2#PBF datasheet, LTM8061EV-8.2#PBF pinout, LTM8061EV-8.2#PBF application, or LTM8061EV-8.2#PBF equivalent, this page provides verified specifications, validated pin functions, confirmed thermal performance (θJCbottom = 6.1°C/W), real-world NTC thermistor interface behavior, and accurate charge termination logic for 8.2V battery systems.
Technical Context
The LTM8061EV-8.2#PBF implements a constant-frequency (0.9–1.1 MHz), average-current-mode step-down architecture with integrated 32V power Schottky diode for reverse-input protection. Its battery management controller executes preconditioning (5.65V threshold), C/10 termination (200 mA at 2A max), and auto-restart (2.5% float drop) without external microcontroller intervention.
It features dual termination modes: programmable end-of-cycle timer (via TMR pin capacitor) and analog current-sense-based C/10 detection. The RNG/SS pin sources 50 µA to enable precise dynamic charge current scaling (0–2 A) and soft-start via RC ramp, while NTC monitoring uses 50 µA bias and 0.29 V / 1.36 V thresholds for 0°C–40°C safe-charging window.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 11.5 V to 32 V min/max operating range - supports 12 V and 24 V automotive/industrial inputs without pre-regulation |
| BAT Float Voltage | 8.2 V ±0.04 V (0.5% accuracy) - precisely targets two-cell Li-ion/polymer pack full-charge state |
| Max Charge Current | 2 A - delivers full-rate charging for 2S packs up to 16.4 W output power |
| Precondition Threshold | 5.65 V - initiates trickle-charge mode for deeply depleted 2S batteries before full-current phase |
| C/10 Termination Level | 200 mA - halts charging when current drops to 10% of programmed maximum (e.g., 2 A → 200 mA) |
| NTC Monitoring Range | 0.29 V to 1.36 V - corresponds to ~0°C to ~40°C using 10 kΩ β=3380 thermistor; disables charging outside range |
| Thermal Resistance | θJCbottom = 6.1 °C/W - enables high-power dissipation through PCB copper land, critical for 2A continuous operation |
Pinout & Package
Package: 77-lead LGA (15 mm × 9 mm × 4.32 mm), RoHS-compliant, thermally enhanced for automated SMT assembly. Exposed bottom thermal pad requires solder paste stencil and reflow profile per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Bank 1) | Power and signal ground return | Primary reference for all internal regulators and current sensing; must connect to low-impedance PCB ground plane |
| BAT (Bank 2) | Battery charge current output bus | Delivers regulated 8.2 V float and 2 A charge current; auto-restart triggers when voltage falls to 7.99 V (2.5% below float) |
| VINA (Bank 3) | Anode of integrated reverse-protection Schottky | Connect input supply here if reverse-voltage protection is required; diode drop ≤0.55 V at 2 A |
| VINC/CLP (Bank 4) | Input current limit sense node | Enables PowerPath™ system load prioritization; 50 mV threshold sets max input current (e.g., 33 mΩ → 1.5 A) |
| VIN (Bank 5) | Main input supply rail | Direct connection point for 11.5–32 V source; requires ≥4.7 µF low-ESR ceramic decoupling |
| BIAS (G7) | Internal power bus supply | Must be ≥2.9 V and ≤10 V; typically tied to BAT; reduces dissipation when powered from 3.3 V in high-VIN 2S apps |
| CHRG (K7) | Open-collector charge status output | Pulled low during active charging; high-Z after termination; sinks ≤10 mA; compatible with VIN-level pull-ups |
| FAULT (J7) | Open-collector fault indicator | Pulled low on NTC fault or bad-battery detection (precondition timeout); high-Z otherwise |
| RNG/SS (H7) | Charge current programming & soft-start | Sources 50 µA; 0–1 V range scales max IBAT linearly (e.g., 0.5 V → 1 A); capacitor enables controlled ramp-up |
| NTC (H6) | NTC thermistor monitor input | 50 µA bias current; monitors voltage across 10 kΩ β=3380 thermistor; disables charging if <0.29 V or >1.36 V |
| TMR (J6) | End-of-cycle timer capacitor node | Capacitor sets EOC time: tEOC = CTIMER × 4.4×10⁶ seconds; 0.68 µF → 3 h; grounding disables timer |
| RUN (K6) | Enable/shutdown control with UVLO | 1.20 V rising threshold with 120 mV hysteresis; pulls VIN current to 15 µA in shutdown; 1 µA input bias |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 8.2 V float voltage | Guaranteed 0.5% accuracy over –40°C to 125°C internal temperature - eliminates external DAC or resistor divider calibration |
| Integrated reverse-input protection | On-die 32 V Schottky diode with ≤0.55 V forward drop at 2 A - removes need for external diode and saves board space |
| Programmable input current limit (CLP) | 50 mV sense threshold enables seamless system load priority - maintains stable input current while dynamically reducing charge rate |
| Auto-restart on battery voltage drop | Triggers new charge cycle when BAT falls 2.5% below 8.2 V (to 7.99 V) - ensures full capacity retention in intermittently used 2S devices |
| Bad-battery detection with auto-reset | Halts charging if battery fails to reach 5.65 V precondition threshold within 1/8 of EOC time - prevents unsafe charging of shorted or open cells |
| Thermally enhanced LGA package | θJCbottom = 6.1 °C/W enables 2 A continuous operation on standard 2-layer PCBs without heatsinks or forced air |
Applications
| Industrial Handheld Instruments | Professional Video/Camera Chargers |
|---|---|
Use Scenario: Portable multimeters, thermal imagers, and ruggedized data loggers powered by removable 2S Li-ion packs. IC Role / Device Role / Timing Role: Standalone battery charger managing full CC/CV profile, preconditioning, and temperature-safe charging without MCU supervision. Use Value: Enables compact, self-contained charging subsystem with 8.2 V precision float and automatic recharge - extends field usability between charges. |
Use Scenario: On-location battery chargers for broadcast-grade cameras using hot-swappable 2S polymer packs. IC Role / Device Role / Timing Role: Primary charge controller executing fast 2 A charging, NTC-based thermal cutoff, and fault signaling to host UI. Use Value: Guarantees safe, repeatable 8.2 V termination across ambient temperatures - prevents overvoltage stress on sensitive camera electronics. |
| 12 V Automotive Accessories | Heavy Equipment Telematics Terminals |
Use Scenario: Dash-mounted vehicle diagnostics tools drawing power from 12 V battery with backup 2S Li-ion pack. IC Role / Device Role / Timing Role: Dual-input charger accepting 12 V system power while maintaining 2S pack readiness via CLP-controlled current sharing. Use Value: Eliminates need for separate buck converter and charger IC - simplifies BOM and meets automotive transient immunity requirements. |
Use Scenario: Ruggedized telematics gateways mounted in construction or agricultural machinery with wide-temp 2S backup power. IC Role / Device Role / Timing Role: High-reliability charger operating from 24 V chassis supply, delivering 8.2 V float with –40°C to 125°C internal temp rating. Use Value: Ensures uninterrupted operation during engine-off periods - thermal design (θJCbottom = 6.1°C/W) sustains 2 A charge in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standalone Li-ion battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24610RTWR | External MOSFET controller (no integrated power stage); requires discrete 32 V FETs, inductor, and compensation network | Supports adjustable float (4.0–4.4 V per cell); not factory-configured for 8.2 V - needs resistor programming and layout validation | Select for cost-sensitive designs where BOM flexibility outweighs µModule integration benefits |
| LTC4162EUFD-8.2#PBF | Higher integration: includes I²C interface, telemetry registers, and USB PD-compatible input handling; 1.2 MHz switching | Requires firmware configuration and host processor; supports adaptive charging profiles beyond fixed C/10/timer | Select when system-level battery health monitoring, remote diagnostics, or multi-source input (USB-C, DC) are required |
Compared with BQ24610RTWR and LTC4162EUFD-8.2#PBF, the LTM8061EV-8.2#PBF delivers plug-and-play 2S charging with no external power components, guaranteed 8.2 V float accuracy, and minimal layout effort - ideal for volume industrial products where time-to-market and reliability dominate.
Availability
LTM8061EV-8.2#PBF is available at Aetrix Electronics and suitable for industrial handheld instruments, professional video/camera chargers, and 12 V/24 V automotive accessories requiring stable component supply, long-lifecycle support, and RoHS-compliant µModule packaging.
Supply support for LTM8061EV-8.2#PBF 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 LTM8061EV-8.2#PBF belongs to the µModule® battery charger product line, designed specifically for compact, high-reliability Li-ion charging in space-constrained industrial and portable equipment where input voltage range (11.5–32 V), precision float (8.2 V), and autonomous operation are critical.
FAQ
What is the minimum input voltage required for the LTM8061EV-8.2#PBF to initiate charging?
The LTM8061EV-8.2#PBF requires a minimum VIN of 11.5 V to begin operation - this is specified for the 8.2 V and 8.4 V variants to ensure sufficient headroom for the step-down conversion and internal regulation. Below 11.5 V, the device remains in UVLO and draws only 15 µA in shutdown mode. This threshold is distinct from the 4.6 V UVLO of the 4.1 V/4.2 V variants and is verified in the Electrical Characteristics table under "VIN UVLO Threshold".
How does the LTM8061EV-8.2#PBF handle battery preconditioning for a deeply discharged 2S pack?
The LTM8061EV-8.2#PBF enters precondition mode when BAT voltage is below 5.65 V - the specific threshold for 8.2 V variants. In this mode, it delivers a reduced 300 mA charge current until BAT rises above 5.65 V, then transitions to full-programmed current. If the battery fails to reach this level within one-eighth of the programmed end-of-cycle time (e.g., 22.5 minutes for a 3-hour timer), a bad-battery fault is asserted, pulling FAULT low and suspending charging.
Can the LTM8061EV-8.2#PBF be used without an NTC thermistor?
Yes - the NTC pin (H6) can be left unconnected to disable temperature monitoring. The LTM8061EV-8.2#PBF will operate normally, performing CC/CV charging and termination without thermal supervision. However, safety-critical applications (e.g., medical or aviation) should retain the NTC circuit, as charging is automatically suspended if the pin voltage falls below 0.29 V or exceeds 1.36 V - corresponding to ~0°C and ~40°C with a 10 kΩ β=3380 thermistor.
What is the purpose of the VINC/CLP pin on the LTM8061EV-8.2#PBF, and how is it configured?
The VINC/CLP pin enables PowerPath™ input current limiting: connecting a sense resistor (RCLP) between VINC/CLP and VIN sets the maximum total input current. The LTM8061EV-8.2#PBF regulates charge current downward when the voltage across RCLP reaches 50 mV. For example, a 33 mΩ resistor limits input current to 1.5 A (0.05 V / 0.033 Ω). If unused, VINC/CLP must be tied directly to VIN to avoid floating node issues.
Does the LTM8061EV-8.2#PBF support automatic recharge after full termination?
Yes - the LTM8061EV-8.2#PBF features an auto-restart function that initiates a new charge cycle whenever the BAT voltage drops 2.5% below its 8.2 V float voltage (i.e., to 7.99 V). This occurs regardless of termination method (C/10 or timer-based) and ensures the battery remains at full capacity during intermittent use. The CHRG pin pulses low during each restart, providing visible status feedback.
LTM8061EV-8.2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 77-BLGA
- Packaging:
- Tray
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current, Timer
- Fault Protection:
- -
- Charge Current - Max:
- 2A
- Battery Pack Voltage:
- 8.2V
- Voltage - Supply (Max):
- 32V
- Interface:
- -
- Operating Temperature:
- 0°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 77-LGA (15x9)
LTM8061EV-8.2#PBF FAQ
1.How can I place an order for LTM8061EV-8.2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM8061EV-8.2#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 LTM8061EV-8.2#PBF reliable?
The price and inventory of LTM8061EV-8.2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM8061EV-8.2#PBF is usually 5 days.
3.What payment methods are accepted for LTM8061EV-8.2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM8061EV-8.2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM8061EV-8.2#PBF?
LTM8061EV-8.2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM8061EV-8.2#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 LTM8061EV-8.2#PBF?
For technical support, including LTM8061EV-8.2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM8061EV-8.2#PBF requirements.
6.How does Aetrix verify that LTM8061EV-8.2#PBF is sourced from the original manufacturer or authorized distributors?
All LTM8061EV-8.2#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 LTM8061EV-8.2#PBF meets industry standards.
7.What is the process for return or replacement of LTM8061EV-8.2#PBF?
All LTM8061EV-8.2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM8061EV-8.2#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 LTM8061EV-8.2#PBF part is unused and in its original packaging.
Return procedure for LTM8061EV-8.2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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