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Analog Devices Inc. LTM8062IV#PBF
- Part No.:
- LTM8062IV#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 77-BLGA
- Datasheet:
-
LTM8062IV#PBF.pdf
- Description:
- IC BATT CHG MULT-CHEM 1CEL 77LGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,474
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Product details
Overview
LTM8062IV#PBF from Analog Devices (formerly Linear Technology) is a complete 32V-input, 2A µModule® battery charger IC with input voltage regulation for MPPT solar applications. It delivers constant-current/constant-voltage charging, supports LiFePO₄, Li-ion, and SLA batteries, features resistor-programmable float voltage up to 14.4V, and integrates reverse input protection via an internal Schottky diode - used in industrial handheld instruments and 12V–24V automotive battery backup systems.
For engineers reviewing the LTM8062IV#PBF datasheet, LTM8062IV#PBF pinout, LTM8062IV#PBF application, or LTM8062IV#PBF equivalent, key selection considerations include its 77-lead LGA package thermal performance, ADJ-referenced 0.75% float voltage accuracy, VINREG-based solar MPPT control loop, and dual termination options (C/10 or timer-based).
Technical Context
The LTM8062IV#PBF implements a fixed-frequency (1MHz), average-current-mode step-down architecture with integrated power MOSFETs and a 2A-rated Schottky diode. Its battery management controller executes preconditioning (300mA trickle charge below 2.3V ADJ), auto-restart on 2.5% float voltage drop, and NTC-based temperature fault detection with ±5°C hysteresis.
Input voltage regulation is enforced via the VINREG pin, where a 100kΩ internal resistor to GND enables programmable minimum input voltage (e.g., solar VMP) by external divider; regulation activates when VINREG falls below 2.7V, reducing charge current to maintain setpoint. The RUN pin provides precision 1.25V threshold enable with 120mV hysteresis and 10nA bias current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.95V to 32V (40V absolute max); enables direct connection to 12V/24V automotive or solar panel inputs without pre-regulation. |
| Max Charge Current | 2A (typical); thermally limited to 1.8–2.1A depending on layout and ambient; supports fast recharge of 2S–4S LiFePO₄ packs. |
| Float Voltage Range | Programmable up to 14.4V via ADJ pin resistor divider; 3.3V reference with ±0.75% accuracy ensures tight battery voltage regulation. |
| Operating Frequency | 0.85–1.15MHz (typ. 1MHz); enables compact external filtering with small inductors and ceramic capacitors. |
| Thermal Package | 77-lead LGA (15mm × 9mm × 4.32mm); θJCbottom = 6.1°C/W supports >2A continuous operation with PCB copper pour. |
| Protection Features | Integrated input reverse voltage protection (Schottky), NTC temperature monitoring, bad battery detection, and thermal foldback. |
| Termination Options | Selectable C/10 current threshold (~200mA) or programmable timer (e.g., 3h with 0.68µF capacitor); supports top-off and safety-critical cutoff. |
Pinout & Package
Package: 77-lead over-molded land grid array (LGA), 15mm × 9mm × 4.32mm, RoHS-compliant, designed for automated SMT assembly and high thermal dissipation (θJB = 11.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (L7) | Power and signal ground return | Primary thermal and low-impedance reference node; must be connected to large PCB copper area for thermal management. |
| BAT (K2) | Battery charge output bus | Delivers regulated charge current; auto-restart triggers when ADJ voltage drops 2.5% below float setpoint. |
| VINA (H1) | Anode of integrated Schottky diode | Enables reverse input protection; connect here for polarity-safe input when reverse voltage risk exists. |
| VIN (G1) | Main input supply | Accepts 4.95–32V; requires ≥4.7µF low-ESR decoupling; bypasses internal diode when VINA not used. |
| BIAS (G7) | Internal power bus supply | Must be ≥2.8V and ≤10V; typically tied to BAT; reduces switching losses when powered from intermediate rail. |
| CHRG (K7) | Open-collector charge status | Pulled low during active charge; high-impedance at C/10; sinks up to 10mA; compatible with VIN-level pull-ups. |
| FAULT (J7) | Open-collector fault indicator | Pulled low on NTC fault, bad battery, or timer timeout; signals system-level failure requiring intervention. |
| ADJ (H7) | Float voltage feedback input | 3.3V reference point; float voltage programmed via resistor divider; 110nA bias current requires ≤250kΩ equivalent resistance. |
| VINREG (L6) | Input regulation reference | Monitors input voltage for MPPT; 100kΩ internal pull-down sets regulation threshold at 2.7V; enables solar peak power tracking. |
| RUN (K6) | Enable/shutdown control | 1.25V rising threshold with 120mV hysteresis; pulls IC into 15µA shutdown when <0.4V; supports system-level UVLO. |
| TMR (J6) | Charge termination timer | Capacitor-to-ground sets end-of-charge time; 0.68µF = ~3h EOC; grounding disables timer for C/10-only termination. |
| NTC (H6) | Battery temperature monitor | Sources 50µA for 10kΩ B=3380 thermistor; disables charge if voltage <0.29V (>40°C) or >1.36V (<0°C). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MPPT input regulation | VINREG pin + internal 100kΩ resistor enables solar panel voltage tracking without external op-amps or controllers. |
| Resistor-programmable float voltage | Up to 14.4V with 0.75% reference accuracy; eliminates need for external DAC or precision voltage sources. |
| Preconditioning & auto-restart | 300mA trickle charge for deeply discharged batteries; automatic restart when battery voltage drops 2.5% below float setpoint. |
| Dual termination schemes | Selectable C/10 current threshold or programmable timer (with bad-battery detection) improves safety and runtime predictability. |
| Onboard reverse input protection | Integrated 32V Schottky diode eliminates discrete protection component and associated board space and BOM cost. |
| Low-quiescent standby mode | 85µA supply current when not charging; extends host system battery life during idle periods. |
Applications
| Industrial Handheld Instruments | 12V–24V Automotive Battery Backup |
|---|---|
Use Scenario: Portable test equipment with LiFePO₄ battery pack operating in wide-temperature environments (-40°C to 125°C junction). IC Role / Device Role / Timing Role: Primary battery charger managing CC/CV profile, NTC-based thermal cutoff, and auto-restart after field discharge. Use Value: Eliminates need for external MPPT controller or discrete protection diodes; 77-lead LGA footprint simplifies layout in space-constrained enclosures. |
Use Scenario: Telematics unit powered from vehicle 12V/24V rail with backup battery maintaining GPS/cellular connectivity during engine-off periods. IC Role / Device Role / Timing Role: Input-regulated charger preventing alternator overvoltage damage while maintaining precise 14.4V float for lead-acid or LiFePO₄ backup cells. Use Value: VINREG loop maintains stable charge current even during cranking dips; integrated reverse protection guards against battery terminal reversal during jump-starts. |
| Desktop Cradle Chargers | Solar-Powered Remote Sensors |
Use Scenario: Docking station for rugged tablets using 2S LiFePO₄ battery, requiring safe, maintenance-free charging with LED status indication. IC Role / Device Role / Timing Role: Constant-current charger with CHRG/FAULT open-collector outputs driving discrete LEDs for user feedback. Use Value: C/10 termination ensures full capacity without overcharge; BIAS pin flexibility allows direct BAT tie without auxiliary supply. |
Use Scenario: Off-grid environmental sensor node powered by 20W solar panel and 12V sealed lead-acid battery in desert conditions. IC Role / Device Role / Timing Role: MPPT charger regulating input to solar panel's VMP point while compensating for temperature drift via VINREG network. Use Value: Achieves >90% solar energy harvest efficiency across -40°C to +85°C ambient; NTC monitoring prevents charging below freezing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM8062AIV#PBF | Higher max float voltage (18.8V vs 14.4V); identical pinout, package, and feature set. | Required for 4S Li-ion (16.8V) or higher-voltage SLA systems; not suitable for 3.6V–14.4V LiFePO₄ designs without recalibration. | Select LTM8062AIV#PBF only when >14.4V float is needed; otherwise LTM8062IV#PBF offers tighter tolerance at lower cost. |
| BQ24650RGER | External MOSFET controller (not µModule); requires discrete inductor, FETs, and compensation components; 28-pin QFN vs 77-lead LGA. | Offers greater design flexibility and thermal customization but increases BOM count, layout complexity, and validation effort. | Choose BQ24650RGER for cost-sensitive, high-volume designs where board space is less constrained and engineering resources allow full power stage tuning. |
Compared with LTM8062AIV#PBF, the LTM8062IV#PBF provides optimized accuracy and thermal performance for sub-14.4V battery chemistries, while BQ24650RGER trades integration for configurability - making LTM8062IV#PBF ideal for rapid prototyping and space-limited industrial chargers.
Availability
LTM8062IV#PBF is available at Aetrix Electronics and suitable for industrial handheld instruments, 12V to 24V automotive battery backup systems, and solar-powered remote sensors requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for LTM8062IV#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 LTM8062IV#PBF belongs to the µModule® power product line, engineered to deliver fully integrated, verified power solutions that reduce design cycle time and eliminate complex magnetics, layout, and thermal validation for battery charging applications.
FAQ
What is the maximum programmable battery float voltage for the LTM8062IV#PBF?
The LTM8062IV#PBF supports a maximum battery float voltage of 14.4V, set via a resistor divider on the ADJ pin referencing its internal 3.3V precision bandgap. This limit is fixed for the LTM8062 variant; the LTM8062AIV#PBF extends this to 18.8V. Exceeding 14.4V risks improper regulation or fault behavior in the LTM8062IV#PBF.
Does the LTM8062IV#PBF require external MOSFETs or inductors?
No - the LTM8062IV#PBF is a complete µModule® solution integrating power MOSFETs, PWM controller, compensation network, and a 2A Schottky diode. Only external components required are the ADJ resistor divider, optional TMR capacitor, NTC thermistor, input decoupling capacitor (≥4.7µF), and output capacitor (if needed for stability). No external inductor is needed.
How does the LTM8062IV#PBF implement maximum power point tracking (MPPT) for solar panels?
The LTM8062IV#PBF implements MPPT via its VINREG pin: a resistor divider from VIN to GND sets a target input voltage (e.g., solar panel VMP). When VINREG falls below 2.7V, the IC reduces charge current to maintain that voltage - effectively servoing the panel at peak power. No external MPPT algorithm or microcontroller is required.
Can the LTM8062IV#PBF charge LiFePO₄ batteries safely?
Yes - the LTM8062IV#PBF is explicitly qualified for LiFePO₄, Li-ion, and SLA chemistries. For a standard 1-cell LiFePO₄ (3.6V nominal), it programs a 3.6V float using the ADJ divider; NTC monitoring prevents charging outside 0°C–40°C, and preconditioning protects deeply discharged cells. Table 1 in the datasheet lists validated configurations.
What is the thermal performance of the LTM8062IV#PBF in its 77-lead LGA package?
The LTM8062IV#PBF features θJCbottom = 6.1°C/W and θJB = 11.2°C/W. With a 4-layer PCB having 2oz copper and 400mm² thermal pad area, it sustains 2A continuous charge current at 25°C ambient. Junction temperature must stay ≤125°C; derating begins above 85°C ambient or with insufficient copper area.
LTM8062IV#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 77-BLGA
- Packaging:
- Tray
- Product Status:
- Active
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1
- Current - Charging:
- Constant
- Programmable Features:
- Timer
- Fault Protection:
- -
- Charge Current - Max:
- 2.1A
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 32V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 77-LGA (15x9)
LTM8062IV#PBF FAQ
1.How can I place an order for LTM8062IV#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM8062IV#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 LTM8062IV#PBF reliable?
The price and inventory of LTM8062IV#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM8062IV#PBF is usually 5 days.
3.What payment methods are accepted for LTM8062IV#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM8062IV#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM8062IV#PBF?
LTM8062IV#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM8062IV#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 LTM8062IV#PBF?
For technical support, including LTM8062IV#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM8062IV#PBF requirements.
6.How does Aetrix verify that LTM8062IV#PBF is sourced from the original manufacturer or authorized distributors?
All LTM8062IV#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 LTM8062IV#PBF meets industry standards.
7.What is the process for return or replacement of LTM8062IV#PBF?
All LTM8062IV#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM8062IV#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 LTM8062IV#PBF part is unused and in its original packaging.
Return procedure for LTM8062IV#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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