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Analog Devices Inc. LTM8061IV-4.2#PBF
- Part No.:
- LTM8061IV-4.2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 77-BLGA
- Datasheet:
-
LTM8061IV-4.2#PBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 77LGA
- Quantity:
- Payment:
- Shipping:
Inventory:668
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Product details
Overview
LTM8061IV-4.2#PBF from Analog Devices (formerly Linear Technology) is a standalone 32V-input, 2A µModule Li-ion battery charger optimized for single-cell 4.2V float applications. It delivers constant-current/constant-voltage charging with 0.5% float voltage accuracy, C/10 or timer-based termination, and integrated preconditioning for deeply depleted batteries - used in professional camera chargers and industrial handheld instruments.
For engineers reviewing the LTM8061IV-4.2#PBF datasheet, LTM8061IV-4.2#PBF pinout, LTM8061IV-4.2#PBF application, or LTM8061IV-4.2#PBF equivalent, key selection criteria include input voltage range (4.95V–32V), fixed 4.2V float voltage, programmable 2A max charge current, NTC temperature monitoring, and bad-battery detection with auto-reset.
Technical Context
The LTM8061IV-4.2#PBF implements a constant-frequency (0.9–1.1 MHz) average-current-mode step-down architecture with integrated power Schottky diode for reverse input protection. Its internal battery management controller executes preconditioning (300mA trickle at BAT < 2.9V), C/10 termination (200mA threshold), and auto-restart when BAT drops 2.5% below 4.2V float.
It features dual open-collector status outputs (CHRG, FAULT), precision RUN enable (1.20V threshold, 120mV hysteresis), and configurable inputs: RNG/SS for dynamic charge current scaling (0–2A), TMR for 3-hour end-of-cycle timing, and NTC for ±5°C hysteresis temperature monitoring using a 10kΩ β=3380 thermistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.95V to 32V - supports direct connection to 12V/24V automotive and industrial rails without pre-regulation. |
| Float Voltage | 4.2V ±0.02V - factory-trimmed for single-cell Li-ion/polymer packs; 0.5% accuracy ensures safe full-charge state. |
| Max Charge Current | 2A - programmable down to 0A via RNG/SS pin; thermal foldback protects under high ambient or poor PCB cooling. |
| Charge Termination | C/10 (200mA) or 3-hour timer - selectable by grounding TMR (C/10) or connecting 0.68µF capacitor (timer). |
| NTC Monitoring Range | 0°C to 40°C - disables charging if NTC pin voltage <0.29V (T>40°C) or >1.36V (T<0°C); ~5°C hysteresis per threshold. |
| Standby Supply Current | 85µA - enables ultra-low-power maintenance charging in battery-backed portable systems. |
| Operating Frequency | 1MHz typical - allows compact external filtering with 8.2µH inductor and 4.7µF input capacitor. |
Pinout & Package
Packaged in a 77-lead, 15mm × 9mm × 4.32mm over-molded LGA (land grid array) with exposed thermal pad - compatible with standard SMT reflow and optimized for high-power density and thermal dissipation (θJCbottom = 6.1°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Bank 1) | Power and signal ground return | Primary reference for all analog and power circuits; must be low-impedance connection to thermal pad. |
| BAT (Bank 2) | Battery charge output bus | Delivers regulated 4.2V float and up to 2A charge current; auto-restart triggers when voltage falls to 4.095V. |
| VINA (Bank 3) | Anode of integrated reverse-protection Schottky | Connect input supply here when reverse-polarity protection is required; 40V absolute max rating. |
| VINC/CLP (Bank 4) | Cathode of reverse diode + system current limit sense | Enables PowerPath™ control: 50mV threshold sets max input current (e.g., 33mΩ = 1.5A limit). |
| VIN (Bank 5) | Main input supply (no reverse protection) | Direct connection point for unidirectional 4.95–32V sources; requires 4.7µF low-ESR decoupling. |
| BIAS (G7) | Internal power rail bias | Must be ≥2.9V and ≤10V; typically tied to BAT; reduces power loss when charging 2-cell with high VIN. |
| CHRG (K7) | Open-collector charge status | Pulled low during active charging; high-impedance after termination; sinks up to 10mA. |
| FAULT (J7) | Open-collector fault indicator | Pulled low on NTC fault or bad-battery detection; high-impedance otherwise. |
| RNG/SS (H7) | Charge current programming / soft-start | Sources 50µA; 0–1V controls 0–2A max current; capacitor enables linear soft-start ramp. |
| TMR (J6) | End-of-cycle timer programming | Capacitor-to-ground sets 3-hour default EOC time; grounded for C/10-only termination. |
| NTC (H6) | Temperature monitor input | Accepts 10kΩ β=3380 thermistor; enables/disable charging based on voltage thresholds (0.29V–1.36V). |
| RUN (K6) | Precision enable/shutdown | 1.20V rising threshold with 120mV hysteresis; pulls VIN current to 15µA in shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reverse input protection | On-chip 32V Schottky diode eliminates need for external protection FET or diode in 12V/24V systems. |
| Preconditioning & bad-battery detection | Automatically applies 300mA trickle charge if BAT < 2.9V; suspends charging and asserts FAULT if no response within 22.5 minutes. |
| Dynamic charge rate programming | RNG/SS pin accepts 0–1V analog control or digital pull-down to scale max current from 0A to 2A with 50µA sourcing. |
| Auto-restart on voltage sag | Resumes full charge cycle when BAT drops 2.5% below 4.2V float (to 4.095V), enabling maintenance charging without host intervention. |
| Thermally enhanced LGA package | 9mm × 15mm footprint with 4.32mm height and bottom-side thermal pad achieves θJCbottom = 6.1°C/W for 2A operation. |
Applications
| Industrial Handheld Instruments | Professional Video/Camera Chargers |
|---|---|
Use Scenario: Portable multimeters, thermal imagers, and ruggedized data loggers requiring long runtime and field-replaceable 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 with 0.5% float accuracy and automatic restart - eliminating need for host firmware-based charge control. |
Use Scenario: On-location battery chargers for broadcast-grade cameras powered from vehicle 12V/24V systems. IC Role / Device Role / Timing Role: High-efficiency 2A charger with reverse input protection and wide 4.95–32V input range accepting variable automotive supply. Use Value: Delivers reliable single-cell 4.2V charging across engine cranking dips and alternator surges while maintaining thermal safety via NTC monitoring. |
| 12V to 24V Automotive Accessories | Heavy Equipment Telematics Terminals |
Use Scenario: Dash-mounted GPS trackers, OBD-II dongles, and fleet management units operating directly from vehicle battery. IC Role / Device Role / Timing Role: Input-protected, UVLO-integrated charger providing maintenance charge and deep-discharge recovery for backup Li-ion. Use Value: RUN pin's 1.20V threshold enables simple resistor-divider UVLO; 15µA shutdown current preserves vehicle battery during extended parking. |
Use Scenario: Ruggedized telematics modules mounted in construction or agricultural machinery with wide ambient temperature swings. IC Role / Device Role / Timing Role: Industrial-grade charger (-40°C to 125°C internal temp) with NTC-based thermal cutoff and auto-restart after battery replacement. Use Value: Guarantees safe charging across -40°C cold starts and 85°C engine bay environments using validated 10kΩ thermistor interface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standalone Li-ion battery charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24610RTWR | External MOSFET required; 4.2V float adjustable via resistor divider; no integrated reverse protection or NTC interface. | Requires additional layout area and BOM components; suitable where cost sensitivity outweighs integration needs. | Select BQ24610RTWR only when discrete FET control, adjustable float, or multi-cell flexibility (up to 14S) is required - not for drop-in replacement. |
| MP2617GQ-Z | 4.2V fixed float; 2A max current; no integrated reverse diode; NTC support limited to basic comparator (no hysteresis or auto-reset). | Lacks PowerPath™ CLP function and precise C/10 termination; lower thermal performance in LGA-24 package. | Choose MP2617GQ-Z for space-constrained designs where 24-pin QFN suffices and reverse protection is handled externally. |
Compared with LTM8061IV-4.2#PBF, BQ24610RTWR demands external power FETs and lacks integrated protection, while MP2617GQ-Z omits reverse diode, precise NTC hysteresis, and PowerPath™ current limiting - making LTM8061IV-4.2#PBF the only option delivering full µModule integration, thermal robustness, and industrial-grade fault handling in a single LGA package.
Availability
LTM8061IV-4.2#PBF is available at Aetrix Electronics and suitable for industrial handheld instruments, professional video/camera chargers, and 12V–24V automotive accessories requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for LTM8061IV-4.2#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 ICs, serving precision instrumentation, industrial automation, and automotive markets.
The LTM8061IV-4.2#PBF belongs to the µModule® battery charger family - engineered for complete, board-level power subsystem integration with minimal external components, targeting high-reliability portable and vehicle-mounted equipment.
FAQ
What is the exact float voltage accuracy of the LTM8061IV-4.2#PBF?
The LTM8061IV-4.2#PBF provides a factory-trimmed 4.2V float voltage with guaranteed ±0.02V (0.5%) accuracy over its –40°C to 125°C internal operating temperature range. This specification is confirmed in the Electrical Characteristics table under "BAT Float Voltage" for the LTM8061-4.2 variant, ensuring precise full-charge termination for single-cell Li-ion/polymer batteries without external calibration.
Can the LTM8061IV-4.2#PBF operate from a 5V input source?
No - the LTM8061IV-4.2#PBF has a minimum VIN start voltage of 7.5V per the Electrical Characteristics table, and its absolute minimum operating input is 4.95V. However, at 5V input, the device will not initiate charging due to UVLO activation (4.6V threshold with 0.3V hysteresis). Reliable operation begins at ≥7.5V, making it unsuitable for USB-powered or 5V-rail applications.
How does the LTM8061IV-4.2#PBF handle a missing or disconnected battery?
When no battery is present, the LTM8061IV-4.2#PBF enters repeated recharge cycles: it terminates charging upon reaching C/10 (200mA), detects BAT voltage dropping below 4.095V (2.5% below 4.2V), and auto-restarts. This causes a low-amplitude sawtooth waveform at BAT and blinking CHRG output - a visual indicator of missing battery. Adding ≥22µF output capacitance stabilizes this behavior.
Is reverse input voltage protection integrated into the LTM8061IV-4.2#PBF?
Yes - the LTM8061IV-4.2#PBF integrates a high-voltage power Schottky diode. To enable reverse protection, connect the input supply to VINA (anode) and route the cathode (VINC/CLP) to the system load. This eliminates the need for an external reverse-protection FET or diode and supports up to 40V absolute maximum input on VINA.
What NTC thermistor values are validated for use with the LTM8061IV-4.2#PBF?
The LTM8061IV-4.2#PBF is characterized for use with a 10kΩ, β = 3380 NTC thermistor connected between NTC pin and GND. The internal 50µA current source develops voltage across the thermistor, and charging is disabled if that voltage falls outside 0.29V–1.36V (corresponding to ~0°C–40°C). Thermistor resistance >250kΩ disables the function entirely.
LTM8061IV-4.2#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:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current, Timer
- Fault Protection:
- -
- Charge Current - Max:
- 2A
- Battery Pack Voltage:
- 4.2V
- 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-4.2#PBF FAQ
1.How can I place an order for LTM8061IV-4.2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM8061IV-4.2#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-4.2#PBF reliable?
The price and inventory of LTM8061IV-4.2#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-4.2#PBF is usually 5 days.
3.What payment methods are accepted for LTM8061IV-4.2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM8061IV-4.2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM8061IV-4.2#PBF?
LTM8061IV-4.2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM8061IV-4.2#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-4.2#PBF?
For technical support, including LTM8061IV-4.2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM8061IV-4.2#PBF requirements.
6.How does Aetrix verify that LTM8061IV-4.2#PBF is sourced from the original manufacturer or authorized distributors?
All LTM8061IV-4.2#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-4.2#PBF meets industry standards.
7.What is the process for return or replacement of LTM8061IV-4.2#PBF?
All LTM8061IV-4.2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM8061IV-4.2#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-4.2#PBF part is unused and in its original packaging.
Return procedure for LTM8061IV-4.2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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