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Analog Devices Inc. LTC4099EUDC#PBF
- Part No.:
- LTC4099EUDC#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC4099EUDC#PBF.pdf
- Description:
- IC BATT MFUNC LI-ION 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:272
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Product details
Overview
LTC4099EUDC#PBF from Analog Devices (formerly Linear Technology) is an I²C-controlled PowerPath™ controller and full-featured Li-ion/polymer battery charger with integrated ideal diode, Bat-Track™ adaptive output control, and input overvoltage protection. It delivers up to 1.5A charge current, supports USB-compliant 100mA/500mA/620mA/790mA/1A/1.2A input limits, operates from –40°C to +85°C, and manages power seamlessly across USB, wall adapter, and battery sources in portable medical instruments and industrial handhelds.
For engineers reviewing the LTC4099EUDC#PBF datasheet, LTC4099EUDC#PBF pinout, LTC4099EUDC#PBF application, or LTC4099EUDC#PBF equivalent, key selection considerations include I²C-programmable float voltage (4.100V or 4.200V), Bat-Track control for external high-voltage switching regulators, thermal regulation at 85°C or 105°C, NTC-based battery temperature monitoring, and 20-lead 3mm × 4mm QFN package with exposed thermal pad.
Technical Context
The LTC4099EUDC#PBF implements a dual-path power management architecture: a monolithic synchronous step-down regulator for USB/wall inputs (VBUS/WALL) and a constant-current/constant-voltage battery charger with programmable termination timer (1–8 hours). Its Bat-Track control loop dynamically adjusts VOUT to maintain optimal ΔV = VOUT − BAT ≈ 0.3V, maximizing charging efficiency while minimizing heat in high-power-density applications.
I²C interface (7-bit address 0x49, 400kHz max) enables real-time configuration of input current limit (6 modes), charge current (500–1200mA in 100mA steps), float voltage (4.100V or 4.200V), thermal regulation threshold (85°C or 105°C), and overtemperature battery discharge enablement. Critical safety functions include input overvoltage cutoff at 6.35V (ROVSENS = 6.2kΩ), undervoltage lockout (VBUS rising threshold 4.30V), and NTC-based cold/hot/critical temperature fault detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | VBUS: 4.35V to 5.5V (USB-compliant); WALL: 4.15V to 4.45V rising threshold - ensures compatibility with standard 5V sources and automotive auxiliary inputs. |
| Max Charge Current | 1.2A with thermal limiting - supports fast charging of single-cell Li-ion batteries while preventing junction overheating beyond 125°C. |
| Switching Frequency | 2.25MHz typical - enables use of small 3.3µH inductors and reduces EMI through slew-controlled gate drive. |
| I²C Address | 0x49 (7-bit, R/W = 0001001b) - allows direct integration into multi-peripheral embedded systems without address conflict. |
| VOUT Regulation | 4.5V ±0.1V (USB suspend mode); 4.3–4.7V (switching mode, BAT = 4.2V) - maintains stable system rail during battery charging and discharging transitions. |
| Package | 20-lead 3mm × 4mm × 0.75mm QFN with exposed thermal pad (Pin 21 = GND) - provides low θJA = 38°C/W for thermal reliability in compact portable designs. |
| Operating Temp | –40°C to +85°C - qualified for industrial handhelds, portable medical instruments, and automotive accessory applications. |
Pinout & Package
20-lead plastic QFN (3mm × 4mm × 0.75mm) with exposed thermal pad (Pin 21 = GND), RoHS-compliant, lead-free finish. Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OVGATE (1) | Overvoltage protection gate driver | Drives external N-channel MOSFET gate; pulled to GND during overvoltage (>6.35V) to disconnect input and protect internal circuitry. |
| NTC (2) | Negative temperature coefficient thermistor input | Monitors battery temperature via external NTC; triggers charge pause if voltage falls outside 21.9–75.3% of NTCBIAS reference. |
| NTCBIAS (3) | NTC bias reference output | Provides stable bias current for NTC network; requires precision resistor to NTC pin for accurate cold/hot fault detection. |
| VC (4) | Bat-Track control output | Drives VC pin of external LT step-down regulator (e.g., LT3653) to regulate VOUT = BAT + 0.3V, maximizing charging efficiency from high-voltage sources. |
| WALL (5) | Auxiliary input presence sense | Detects >4.15V on auxiliary supply; disables USB path and asserts ACPR low to enable high-voltage charging path. |
| BATSENS (6) | Battery voltage sense | High-impedance input tied directly to BAT node; enables accurate battery voltage measurement for charge termination and safety algorithms. |
| PROG (7) | Charge current program/monitor | Resistor-to-ground sets charge current; voltage reflects actual IBAT via IBAT = VPROG/RPROG × 1030 mA/mA scaling. |
| IRQ (8) | Open-drain interrupt output | Asserts low on configurable events (OVP, thermal fault, charge done, NTC fault); requires external pull-up for system-level status signaling. |
| GND (9,21) | Power and signal ground | Pin 9 and exposed pad (21) must be connected to low-impedance PCB ground plane for thermal dissipation (θJA = 38°C/W) and noise immunity. |
| IDGATE (10) | External ideal diode PMOS gate driver | Controls gate of external P-channel MOSFET to supplement internal 180mΩ ideal diode, reducing forward drop under high load. |
| BAT (11) | Single-cell Li-ion battery connection | Direct connection to battery anode; supports 2.7–4.2V operation with trickle charge (2.7–2.85V), CV, and termination logic. |
| VOUT (12) | System power output | Main power rail for system load; powered by VBUS/WALL (via internal switcher) or BAT (via ideal diode); priority given to load over charging. |
| VBUS (13) | USB/wall adapter input | Accepts 4.35–5.5V input; current limited via CLPROG resistor and I²C-configurable hCLPROG ratio for strict USB compliance. |
| SW (14) | Switching regulator power node | Connects to inductor (3.3µH typical); internal synchronous rectifier delivers high-efficiency buck conversion to VOUT. |
| DVCC (15) | I²C logic reference | Supplies 1.6–5.5V reference for SDA/SCL; requires 0.01µF bypass capacitor for noise immunity on I²C communication lines. |
| SCL (16) | I²C clock input | 400kHz max clock; level-shifted to DVCC - enables robust digital control without external level translators. |
| SDA (17) | I²C data I/O | Open-drain bidirectional line; supports read/write of 16+ registers including charge status, faults, and configuration settings. |
| ACPR (18) | Auxiliary power present (active-low) | Signals valid WALL input; drives external P-MOSFET gate to connect WALL to VOUT when USB is disabled. |
| CLPROG (19) | USB input current limit program | Resistor-to-ground sets max VBUS current; internal servo regulates CLPROG to 1.18V, enforcing precise average input limit per USB spec. |
| OVSENS (20) | Overvoltage sense input | Connected via 6.2kΩ resistor to input; triggers OVGATE shutdown when voltage exceeds 6.35V (±0.25V tolerance). |
Key Features
| Feature | Design Value |
|---|---|
| Bat-Track adaptive output control | Maintains VOUT = BAT + 0.3V during charging, reducing power loss in high-current applications and enabling >1A system loads from 5V USB input. |
| I²C-programmable thermal regulation | Selectable 85°C or 105°C junction temperature limit with automatic charge current reduction - prevents thermal runaway in sealed enclosures. |
| Integrated ideal diode + external PMOS controller | Internal 180mΩ NMOS diode + IDGATE output for external P-MOSFET - ensures <15mV forward drop at 10mA and seamless battery backup during input dropout. |
| NTC-based battery temperature conditioning | Detects cold (<21.9% NTCBIAS), hot (>75.3%), and critical (>33.9%) conditions using external thermistor - pauses charging until safe operating range is restored. |
| USB-compliant input current limiting | 6 programmable modes (100/500/620/790/1000/1200mA) with ±5% accuracy - eliminates need for external current-sense resistors and simplifies USB-IF certification. |
| Overvoltage protection with fast response | 6.35V cutoff threshold with 2.5ms OVGATE regulation time (COVGATE = 1nF) - protects downstream circuitry from transient surges on VBUS/WALL inputs. |
Applications
| Portable Medical Instruments | Industrial Handhelds |
|---|---|
Use Scenario: Battery-powered ultrasound probe with instant-on capability and USB recharging in field service environments. IC Role / Device Role / Timing Role: PowerPath controller managing simultaneous USB charging and real-time imaging load from single Li-ion cell. Use Value: Bat-Track control enables full 500mA USB input to power both 300mA system load and 200mA battery charge without violating USB specs or overheating. |
Use Scenario: Ruggedized barcode scanner used in warehouse logistics with frequent hot-swap battery replacement and wall adapter backup. IC Role / Device Role / Timing Role: Dual-input power manager prioritizing wall adapter over USB, with ideal diode ensuring uninterrupted operation during battery swaps. Use Value: WALL input detection (Pin 5) disables USB path and enables high-efficiency Bat-Track charging from 12V supply, reducing thermal stress by 40% vs linear solution. |
| Smart Phones | Automotive Accessories |
Use Scenario: Secondary battery pack for smartphone external power bank with USB-C PD input negotiation and precise charge control. IC Role / Device Role / Timing Role: I²C-configurable charger with programmable float voltage (4.100V/4.200V) and 1-hour safety timer for cycle-limited Li-poly cells. Use Value: I²C register access allows host MCU to adapt charge profile based on battery age and temperature, extending cycle life by 20%. |
Use Scenario: In-vehicle dashcam with dual power sources (12V automotive and USB) and thermal-aware charging in parked mode. IC Role / Device Role / Timing Role: High-voltage auxiliary input manager interfacing with external LT3653 buck converter to charge battery from 13.5V source. Use Value: Bat-Track VC control (Pin 4) regulates VOUT to BAT + 0.3V, achieving 85% efficiency at 700mA charge current vs 62% with conventional 5V buck. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB PowerPath controller and Li-ion charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24195RGER | TI device with 4.5V–17V input, no Bat-Track, fixed 4.2V float, no WALL input support, 2.1MHz switching. | Lacks auxiliary high-voltage input management and adaptive VOUT control - unsuitable for automotive or 12V adapter applications. | Select when only USB 5V input is required and cost sensitivity outweighs efficiency optimization from Bat-Track. |
| MAX14748GWE+T | Maxim device with 3.5V–28V input, I²C control, 4.2V/4.35V float, but no integrated ideal diode or NTC interface. | Requires external ideal diode FET and thermistor circuit - increases BOM count and layout complexity vs LTC4099EUDC#PBF's integrated solution. | Choose when wider input voltage range (up to 28V) is mandatory and external component count is acceptable for design flexibility. |
Compared with BQ24195RGER and MAX14748GWE+T, the LTC4099EUDC#PBF uniquely integrates Bat-Track control for high-voltage auxiliary inputs, on-die ideal diode with external PMOS driver, and complete NTC thermistor interface - delivering lower thermal footprint, fewer external components, and higher system-level efficiency in dual-source portable applications.
Availability
LTC4099EUDC#PBF is available at Aetrix Electronics and suitable for portable medical instruments, industrial handhelds, smart phones, and automotive accessories requiring stable component supply, extended temperature operation (–40°C to +85°C), and I²C-configurable power management.
Supply support for LTC4099EUDC#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision instrumentation, power management, and industrial applications.
The LTC4099EUDC#PBF belongs to Linear Technology's PowerPath family, designed specifically for portable electronics requiring seamless dual-input power arbitration, high-efficiency battery charging, and robust thermal/safety management in space-constrained environments.
FAQ
What is the primary function of the LTC4099EUDC#PBF in a portable system?
The LTC4099EUDC#PBF serves as an I²C-controlled PowerPath manager and full-featured Li-ion charger that arbitrates power between USB, wall adapter, and battery sources. It delivers up to 1.2A charge current, implements Bat-Track adaptive output control to maximize efficiency, and integrates ideal diode functionality to ensure uninterrupted system operation - all within a compact 3mm × 4mm QFN package. The LTC4099EUDC#PBF enables instant-on behavior even with deeply discharged batteries.
How does the Bat-Track feature of the LTC4099EUDC#PBF improve charging efficiency?
The Bat-Track feature in the LTC4099EUDC#PBF dynamically regulates VOUT to maintain VOUT = BAT + 0.3V during charging, minimizing power dissipation in the switching regulator. This adaptive control reduces heat generation by up to 40% compared to fixed-output buck converters, especially critical in high-power-density applications like portable medical instruments. The LTC4099EUDC#PBF achieves this via its VC pin, which drives external step-down regulators such as the LT3653.
Can the LTC4099EUDC#PBF support both USB and automotive 12V inputs simultaneously?
Yes, the LTC4099EUDC#PBF supports dual-input operation: USB 5V via VBUS and automotive/high-voltage sources via the WALL pin. When WALL voltage exceeds 4.15V, the LTC4099EUDC#PBF automatically disables the USB path and enables Bat-Track control of an external switching regulator. This prioritization ensures optimal efficiency and thermal performance - the LTC4099EUDC#PBF is explicitly designed for such hybrid-source applications.
What safety protections are integrated into the LTC4099EUDC#PBF?
The LTC4099EUDC#PBF integrates multiple hardware-based safety features: input overvoltage protection (6.35V cutoff), VBUS undervoltage lockout (4.30V rising threshold), NTC-based battery temperature monitoring (cold/hot/critical fault detection), thermal regulation (selectable 85°C or 105°C), and ideal diode reverse-current blocking. These protections operate independently of firmware, ensuring fail-safe operation - a critical requirement for the LTC4099EUDC#PBF in portable medical and industrial applications.
Is the LTC4099EUDC#PBF compatible with standard USB specifications?
Yes, the LTC4099EUDC#PBF is fully USB-compliant, supporting programmable input current limits of 100mA, 500mA, 620mA, 790mA, 1A, and 1.2A via I²C and CLPROG resistor programming. Its precision average current limiting (±5% accuracy) and integrated overvoltage protection meet USB-IF requirements for host-powered peripherals. The LTC4099EUDC#PBF also provides USB suspend mode operation with ultra-low quiescent current (0.037mA).
LTC4099EUDC#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PowerPath™
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Multi-Function Controller
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- -
- Fault Protection:
- Over Voltage
- Interface:
- I2C, USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
LTC4099EUDC#PBF FAQ
1.How can I place an order for LTC4099EUDC#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4099EUDC#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 LTC4099EUDC#PBF reliable?
The price and inventory of LTC4099EUDC#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4099EUDC#PBF is usually 5 days.
3.What payment methods are accepted for LTC4099EUDC#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4099EUDC#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4099EUDC#PBF?
LTC4099EUDC#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4099EUDC#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 LTC4099EUDC#PBF?
For technical support, including LTC4099EUDC#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4099EUDC#PBF requirements.
6.How does Aetrix verify that LTC4099EUDC#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4099EUDC#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 LTC4099EUDC#PBF meets industry standards.
7.What is the process for return or replacement of LTC4099EUDC#PBF?
All LTC4099EUDC#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4099EUDC#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 LTC4099EUDC#PBF part is unused and in its original packaging.
Return procedure for LTC4099EUDC#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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