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Analog Devices Inc. LTM8061IV-8.2#PBF
- Part No.:
- LTM8061IV-8.2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 77-BLGA
- Datasheet:
-
LTM8061IV-8.2#PBF.pdf
- Description:
- IC BATT CHG LI-ION 2CELL 77LGA
- Quantity:
- Payment:
- Shipping:
Inventory:106
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Product details
Overview
LTM8061IV-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. It delivers constant-current/constant-voltage charging, supports C/10 or timer-based termination, integrates reverse input protection, and features NTC-based temperature monitoring and bad-battery detection - deployed in professional video camera chargers and 12V–24V automotive auxiliary power systems.
For engineers reviewing the LTM8061IV-8.2#PBF datasheet, LTM8061IV-8.2#PBF pinout, LTM8061IV-8.2#PBF application, or LTM8061IV-8.2#PBF equivalent, key selection criteria include its 8.2V two-cell float accuracy (±0.5%), programmable 2A max charge current, 77-lead LGA package thermal performance (θJCbottom = 6.1°C/W), and dual termination modes - all critical for high-reliability portable industrial battery systems.
Technical Context
The LTM8061IV-8.2#PBF implements a constant-frequency (1MHz) average-current-mode step-down architecture with integrated 32V power Schottky diode for reverse input protection. Its battery management controller autonomously executes preconditioning (5.65V threshold), C/10 termination, or 3-hour timer-based end-of-cycle control, while monitoring NTC thermistor voltage (0.29V–1.36V range) to suspend charging outside safe temperature limits.
It uses precision analog circuitry for float voltage regulation (0.5% accuracy), dynamic charge current programming via RNG/SS (50µA sourced, 0–1V range), and system-level input current limiting via VINC/CLP (50mV sense threshold). The RUN pin provides 1.20V ±120mV UVLO-enabled enable control, and CHRG/FAULT pins deliver open-collector status signaling compatible with VIN-referenced pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 11.5V to 32V (supports 12V/24V automotive rails; 40V absolute max) |
| BAT Float Voltage | 8.2V ±0.04V (0.5% accuracy; fixed for 2S Li-ion/Li-polymer) |
| Max Charge Current | 2A (programmable down to 0A via RNG/SS; thermal foldback protected) |
| Charge Termination | C/10 (200mA at 2A setting) or internal timer (3h typical with 0.68µF on TMR) |
| NTC Monitoring Range | 0°C to 40°C (via 10kΩ β=3380 thermistor; 5°C hysteresis per threshold) |
| Package Thermal Resistance | θJCbottom = 6.1°C/W (enables >1.5A continuous operation on 2-layer PCB) |
| Operating Temperature | –40°C to +125°C internal junction (industrial-grade qualification) |
Pinout & Package
77-lead land grid array (LGA) package, 15mm × 9mm × 4.32mm, thermally enhanced bottom-side copper pad for PCB heat sinking. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Bank 1) | Power and signal ground return | Primary low-impedance reference for switching node, control logic, and thermal pad connection |
| BAT (Bank 2) | Battery charge output bus | Delivers regulated 8.2V float; auto-restart triggers when voltage drops 2.5% below float |
| VINA (Bank 3) | Anode of integrated reverse-protection Schottky | Connect input source here if reverse polarity protection is required (max 40V) |
| VINC/CLP (Bank 4) | Current limit sense / system load monitor | 50mV threshold enables programmable input current limit (e.g., 33mΩ = 1.5A max) |
| VIN (Bank 5) | Main input supply | Accepts 11.5–32V; requires ≥4.7µF low-ESR decoupling capacitor |
| BIAS (G7) | Internal bias rail supply | Must be ≥2.9V and ≤10V; typically tied to BAT; reduces dissipation when powered from 3.3V |
| CHRG (K7) | Open-collector charge status | Pulled low during active charge; high-Z after termination; sinks up to 10mA |
| FAULT (J7) | Open-collector fault indicator | Pulled low on NTC fault, bad-battery detection, or timer timeout; high-Z otherwise |
| RNG/SS (H7) | Charge current programming / soft-start | 50µA sourced; 0–1V sets 0–2A max current; capacitor enables linear soft-start ramp |
| TMR (J6) | End-of-cycle timer programming | Capacitor-to-ground sets 3h default EOC time; grounded to enable C/10 termination only |
| NTC (H6) | Temperature monitor input | Sources 50µA; monitors 10kΩ thermistor; disables charge if voltage <0.29V or >1.36V |
| RUN (K6) | Enable/UVLO control | 1.20V rising threshold with 120mV hysteresis; pulls to 0.4V for 15µA shutdown mode |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reverse input protection | 32V-rated Schottky diode eliminates need for external protection FET or diode |
| Auto-restart on battery voltage drop | Resumes charging when BAT falls 2.5% below 8.2V float - maintains full capacity in intermittently loaded systems |
| Bad-battery detection with auto-reset | Suspends charge if battery fails to reach 5.65V precondition threshold within 22.5 min; restarts cleanly upon battery replacement |
| Dynamic charge current programming | RNG/SS pin accepts 0–1V analog control or digital sink to scale max current from 0A to 2A without firmware |
| System-aware input current limiting | VINC/CLP interface allows shared-input systems (e.g., charger + MCU + display) to cap total draw at precise levels |
Applications
| Professional Video Camera Charging | 12V/24V Automotive Auxiliary Power |
|---|---|
Use Scenario: On-location charging of dual-cell Li-ion battery packs powering broadcast-grade cameras with real-time telemetry. IC Role / Device Role / Timing Role: Standalone 8.2V float charger managing CC/CV profile, NTC temperature validation, and auto-restart during field battery swaps. Use Value: Eliminates external microcontroller and discrete power stage; achieves >85% efficiency at 1.5A into 8.2V battery from 24V vehicle supply. |
Use Scenario: Charging auxiliary 2S Li-ion backup batteries in heavy-duty truck telematics units exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Industrial-grade battery manager providing –40°C to +125°C operation, bad-battery fault isolation, and reverse-polarity input resilience. Use Value: Guarantees safe charging across cold cranking (11.5V min VIN) and alternator surges (up to 32V), with thermal foldback preventing overtemperature failure. |
| Industrial Handheld Instruments | Portable Medical Monitoring Devices |
Use Scenario: Rechargeable 2S battery pack in ruggedized handheld test equipment used in factory floor environments. IC Role / Device Role / Timing Role: Primary charge controller enforcing JEITA-compliant temperature limits via NTC, with C/10 termination for predictable cycle life. Use Value: Reduces BOM count by integrating power switch, compensation, and safety logic; meets IEC 62368-1 creepage requirements via LGA package isolation. |
Use Scenario: Battery-powered patient monitors requiring certified, fail-safe charging in clinical settings with strict EMC and reliability mandates. IC Role / Device Role / Timing Role: Safety-critical charger implementing dual-fault detection (NTC + bad-battery), open-drain status outputs for host MCU supervision, and low standby current (85µA). Use Value: Enables 30-day shelf life on single charge; CHRG/FAULT signals allow host to log fault events and disable charging before thermal excursion. |
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 required; 8.4V float only; no integrated reverse protection; 40-pin QFN | Requires additional layout area and gate drive design; lacks auto-restart and NTC hysteresis | Select when cost sensitivity outweighs integration benefits and 8.4V float suffices |
| MP2617GR-Z | Fixed 8.4V float; no C/10 termination option; 20-pin QFN; no VINC/CLP system load sharing | Lacks input current limiting and dual-termination flexibility; lower thermal performance (θJA = 45°C/W) | Choose for space-constrained designs where 8.4V is acceptable and system load coordination is unnecessary |
Compared with BQ24610RTWR and MP2617GR-Z, the LTM8061IV-8.2#PBF offers unique integration of reverse protection, precise 8.2V float, and system-aware current limiting - reducing bill-of-materials count and enabling robust operation in automotive and industrial environments without external supervision.
Availability
LTM8061IV-8.2#PBF is available at Aetrix Electronics and suitable for professional video camera charging, 12V/24V automotive auxiliary power, and industrial handheld instrumentation requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature grade (–40°C to +125°C).
Supply support for LTM8061IV-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 LTM8061IV-8.2#PBF belongs to the µModule® battery charger product line, designed to simplify high-voltage, high-current Li-ion charging in space- and reliability-constrained applications - eliminating external power stages, compensation networks, and safety logic.
FAQ
What is the exact float voltage accuracy of the LTM8061IV-8.2#PBF?
The LTM8061IV-8.2#PBF guarantees 8.2V float voltage with ±0.04V (±0.5%) accuracy over temperature and line conditions. This specification is confirmed in the Electrical Characteristics table (page 3 of the datasheet) under "BAT Float Voltage" for LTM8061-8.2 variants, with min/typ/max values of 8.16V/8.2V/8.24V at TA = 25°C and full-range operation validated from –40°C to +125°C internal junction temperature.
Does the LTM8061IV-8.2#PBF support both C/10 and timer-based charge termination?
Yes, the LTM8061IV-8.2#PBF supports both termination methods. Grounding the TMR pin enables C/10 termination (charging stops when current falls to 200mA at 2A setting). Connecting a capacitor (e.g., 0.68µF) to TMR enables timer-based termination (default 3-hour cycle), which allows top-off beyond C/10 and activates bad-battery detection if preconditioning fails within 22.5 minutes - both modes are hardware-selectable without firmware.
What is the minimum input voltage required for the LTM8061IV-8.2#PBF to operate with a 2-cell battery?
The LTM8061IV-8.2#PBF requires a minimum input voltage of 11.5V to initiate and sustain charging of an 8.2V two-cell battery, as specified in the "VIN Start Voltage" parameter (page 3, Electrical Characteristics). This ensures sufficient headroom for the step-down regulator to maintain regulation across load and temperature variations, and aligns with 12V nominal automotive and industrial supply rails.
How does the NTC temperature monitoring function work on the LTM8061IV-8.2#PBF?
The LTM8061IV-8.2#PBF sources 50µA from the NTC pin to bias a standard 10kΩ, β=3380 NTC thermistor. Charging is disabled if the resulting voltage falls below 0.29V (indicating >40°C) or rises above 1.36V (indicating <0°C), with ~5°C hysteresis at each threshold. The function remains active as long as thermistor resistance stays below 250kΩ; leaving the pin unconnected disables monitoring.
Can the LTM8061IV-8.2#PBF be used without connecting the BIAS pin?
No - the BIAS pin must be connected to a valid supply between 2.9V and 10V for proper operation. In most designs, it is tied directly to the BAT pin. If left floating, the LTM8061IV-8.2#PBF will not power internal circuitry or switching stages. When charging a 2-cell battery from high input voltage (e.g., 24V), connecting BIAS to a local 3.3V rail reduces power dissipation and improves thermal margin.
LTM8061IV-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:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 77-LGA (15x9)
LTM8061IV-8.2#PBF FAQ
1.How can I place an order for LTM8061IV-8.2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM8061IV-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 LTM8061IV-8.2#PBF reliable?
The price and inventory of LTM8061IV-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 LTM8061IV-8.2#PBF is usually 5 days.
3.What payment methods are accepted for LTM8061IV-8.2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM8061IV-8.2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM8061IV-8.2#PBF?
LTM8061IV-8.2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM8061IV-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 LTM8061IV-8.2#PBF?
For technical support, including LTM8061IV-8.2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM8061IV-8.2#PBF requirements.
6.How does Aetrix verify that LTM8061IV-8.2#PBF is sourced from the original manufacturer or authorized distributors?
All LTM8061IV-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 LTM8061IV-8.2#PBF meets industry standards.
7.What is the process for return or replacement of LTM8061IV-8.2#PBF?
All LTM8061IV-8.2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM8061IV-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 LTM8061IV-8.2#PBF part is unused and in its original packaging.
Return procedure for LTM8061IV-8.2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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