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Analog Devices Inc. LTC4098EPDC-1#TRPBF
- Part No.:
- LTC4098EPDC-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- 20-UFQFN Exposed Pad
- Datasheet:
-
LTC4098EPDC-1#TRPBF.pdf
- Description:
- IC BATT MFUNC LI-ION 1CL 20UTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,514
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Product details
Overview
LTC4098EPDC-1#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency USB/automotive PowerPath controller and Li-ion battery charger IC. It integrates a 2.25 MHz step-down switching regulator with Bat-Track adaptive output control, 180 mΩ internal ideal diode, overvoltage protection circuitry, and NTC-based thermal monitoring. It delivers up to 700 mA system load current from USB while charging at up to 1.5 A, targeting portable electronics requiring instant-on operation with dead-battery support.
For engineers reviewing the LTC4098EPDC-1#TRPBF datasheet, LTC4098EPDC-1#TRPBF pinout, LTC4098EPDC-1#TRPBF application, or LTC4098EPDC-1#TRPBF equivalent, key selection criteria include its 4.1 V float voltage (LTC4098-1 variant), 20-lead 3 mm × 4 mm QFN package, USB-compliant input current limiting (1x/5x/10x modes), Bat-Track external regulator control (VC/WALL/ACPR), and integrated overvoltage protection with OVGATE/OVSENS interface.
Technical Context
The LTC4098EPDC-1#TRPBF implements a dual-path power management architecture: a monolithic Bat-Track switching regulator for USB/wall inputs (VBUS → VOUT) and an external high-voltage Bat-Track controller (VC/WALL/ACPR) for automotive/Firewire sources. Its average input current limit is precisely servo-controlled via CLPROG (1.188 V threshold) and programmable hCLPROG ratios (230–2210 mA/mA), ensuring strict USB compliance across 1x/5x/10x modes.
It features hierarchical power prioritization: high-voltage WALL input disables USB automatically; VOUT supplies system load first, then allocates residual power to battery charging; and BAT-to-VOUT ideal diode (internal 180 mΩ + external PMOS control via IDGATE) maintains uninterrupted system power during input loss or low-power conditions. The 4.100 V ±0.5% float voltage (LTC4098-1) improves high-temperature battery safety margin versus standard 4.2 V chargers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage | 4.100 V ±0.5% - precise float voltage optimized for extended Li-ion cycle life and thermal safety above 45°C. |
| USB Input Current Limit | Programmable 1x/5x/10x modes (e.g., 100/500/1000 mA typical) - enables strict USB 2.0/3.0 compliance without external current-sense resistors. |
| Switching Frequency | 2.25 MHz typical - allows compact 3.3 µH inductor and ceramic output capacitors, reducing solution footprint and EMI. |
| Internal Ideal Diode RON | 180 mΩ - minimizes dropout and power loss when sourcing VOUT from BAT during USB disconnect or overload. |
| Overvoltage Threshold | 6.35 V typical (ROVSENS = 6.04 kΩ) - protects VBUS/WALL inputs from accidental 12 V/24 V exposure using external N-FET. |
| Operating Temp Range | –40°C to +85°C - qualified for industrial and automotive accessory applications with full parameter guarantees. |
| Junction Temp Limit | 125°C with thermal regulation - activates automatic charge current reduction to prevent silicon damage under sustained high-power operation. |
Pinout & Package
Package: 20-lead, 3 mm × 4 mm × 0.75 mm plastic QFN (UTQFN) with exposed pad (Pin 21) soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OVSENS (1) | Overvoltage sense input | Monitors input voltage via resistor divider; triggers OVGATE shutdown if exceeds 6.35 V threshold. |
| OVGATE (2) | Overvoltage gate driver | Drives gate of external N-channel FET to disconnect VBUS/WALL during overvoltage events. |
| CLPROG (3) | USB current limit programming/monitoring | Sets and measures average input current; 1.188 V servo point enables precise USB compliance without sensing resistor. |
| NTCBIAS (4) | NTC thermistor bias reference | Provides stable current source for battery temperature monitoring circuit (cold/hot fault detection). |
| NTC (5) | Battery temperature sensor input | Connects to NTC thermistor; pauses charging if battery temp falls outside safe range (e.g., <0°C or >45°C). |
| BATSENS (6) | Battery voltage sense | Direct Kelvin connection to BAT node ensures accurate 4.100 V float regulation and prevents trace IR errors. |
| PROG (7) | Charge current programming/monitoring | 1 V servo voltage with 1030× scaling factor (IBAT = VPROG/RPROG × 1030) enables accurate current setting and readback. |
| CHRG (8) | Open-drain charge status indicator | 35 kHz modulated output signals charging/not charging/bad battery/thermal fault to MCU or LED. |
| GND (9,21) | Power and signal ground | Exposed pad (21) must be soldered to PCB ground plane for thermal dissipation and noise immunity. |
| IDGATE (10) | External ideal diode PMOS gate driver | Controls external P-channel FET to supplement internal 180 mΩ diode, reducing total forward drop under high load. |
| BAT (11) | Single-cell Li-ion battery terminal | Charged to 4.100 V; powers VOUT via ideal diode when input sources are absent or insufficient. |
| VOUT (12) | System power output | Delivers regulated power to application load; tracks BAT + 0.3 V in Bat-Track mode to minimize charger losses. |
| VBUS (13) | USB/wall adapter input | Accepts 4.35–5.5 V; bypassed with 10 µF MLCC; supports suspend modes with ultra-low quiescent current. |
| SW (14) | Switching regulator power switch node | Connects to inductor (3.3 µH); carries high-frequency pulsed current; requires tight layout to minimize EMI. |
| D0–D2 (15–17) | Mode select digital inputs | 3-bit configuration selects USB current limit (1x/5x/10x), suspend mode, and charger enable state. |
| WALL (18) | High-voltage input presence sense | Detects external DC/DC output (e.g., LT3653); disables USB and enables Bat-Track HV control loop. |
| ACPR (19) | Active-low high-voltage present flag | Signals readiness of external HV supply; drives gate of P-FET to route WALL power to VOUT. |
| VC (20) | Bat-Track external regulator control | Drives VC pin of external step-down controller (e.g., LT3653) to regulate VOUT = BAT + 0.3 V for max efficiency. |
Key Features
| Feature | Design Value |
|---|---|
| Bat-Track Adaptive Output Control | Maintains VOUT ≈ BAT + 0.3 V during charging, minimizing power loss in battery charger FET and easing thermal design in compact enclosures. |
| Integrated Overvoltage Protection | Hardware-based OVGATE/OVSENS interface with 6.35 V threshold eliminates need for external protection ICs in USB/automotive designs. |
| Instant-On Operation with Dead Battery | Internal ideal diode and priority-based PowerPath ensure system powers up immediately upon VBUS application, even with 0 V battery. |
| USB Suspend Mode Support | Low-power (0.32 mA) and high-power (2.05 mA) suspend modes meet USB 2.0 specification while maintaining VOUT regulation. |
| Thermal Regulation with Safety Timer | Combines junction temperature limiting (110°C constant-temp mode) and 4-hour safety timer to prevent battery overcharge and thermal runaway. |
Applications
| Smartphones | GPS Navigation Devices |
|---|---|
Use Scenario: Portable smartphone with dual-input (USB + automotive) charging and always-on GPS functionality. IC Role / Device Role / Timing Role: PowerPath controller manages seamless transition between USB and car charger; provides 4.1 V charging for improved battery longevity. Use Value: Enables instant boot from dead battery and extends cycle life by 15–20% vs. 4.2 V chargers under high-temperature operation. | Use Scenario: Automotive-grade handheld GPS unit requiring robust overvoltage protection against 12 V/24 V supply transients. IC Role / Device Role / Timing Role: OVGATE-driven N-FET blocks >6.35 V surges; WALL/ACPR/VC interface controls external LT3653 for efficient 12 V→VOUT conversion. Use Value: Eliminates need for discrete TVS and linear regulators, reducing BOM count by 3 components and PCB area by 25 mm². |
| Portable Media Players | Industrial Handheld Terminals |
Use Scenario: High-resolution media player with fast USB charging and thermal-sensitive OLED display. IC Role / Device Role / Timing Role: Bat-Track regulation minimizes charger heat near display; NTC monitoring halts charging if surface temp exceeds 45°C. Use Value: Prevents display burn-in and battery degradation by enforcing strict thermal limits during rapid charging. | Use Scenario: Ruggedized warehouse terminal operating in wide ambient temperatures (–20°C to 60°C) with intermittent USB charging. IC Role / Device Role / Timing Role: –40°C to +85°C rated operation; trickle-charge enable below 2.85 V; cold-temperature fault detection via NTCBIAS/NTC. Use Value: Guarantees reliable startup and charging in freezing environments where standard chargers fail to initiate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion PowerPath management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24195RGER | 4.2 V fixed float voltage; no Bat-Track; I²C interface; 28-pin VQFN | Lacks adaptive VOUT tracking and external HV control; requires MCU firmware for configuration | Select for cost-sensitive designs needing I²C configurability but not automotive HV input support. |
| MAX14748G17+T | 4.2 V float; integrated 2 A charger; no OVP circuit; 24-pin TQFN | Higher integration (no external FET needed for ideal diode) but no overvoltage protection or WALL interface | Select when board space is critical and input overvoltage risk is mitigated externally. |
Compared with BQ24195RGER and MAX14748G17+T, the LTC4098EPDC-1#TRPBF uniquely combines 4.1 V battery safety optimization, hardware-based OVP, and Bat-Track control for both USB and automotive inputs-enabling simpler, more robust designs in thermally constrained portable equipment.
Availability
LTC4098EPDC-1#TRPBF is available at Aetrix Electronics and suitable for smartphones, GPS navigation devices, portable media players, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for LTC4098EPDC-1#TRPBF 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 power management semiconductors.
The LTC4098/LTC4098-1 product line was designed specifically for portable electronics requiring seamless multi-source power management, dead-battery instant-on capability, and thermally optimized Li-ion charging-targeting USB-powered consumer and industrial devices.
FAQ
What is the exact float voltage of the LTC4098EPDC-1#TRPBF and how does it differ from the standard LTC4098?
The LTC4098EPDC-1#TRPBF has a factory-trimmed float voltage of 4.100 V ±0.5%, optimized for enhanced battery safety at elevated temperatures. This differs from the standard LTC4098, which regulates to 4.200 V ±0.5%. The lower voltage reduces stress on Li-ion cells during prolonged high-temperature operation, extending cycle life and improving thermal margin in sealed enclosures. Both variants maintain identical pinout, package, and functional architecture.
How does the LTC4098EPDC-1#TRPBF implement USB current limiting without an external sense resistor?
The LTC4098EPDC-1#TRPBF uses an internal current-sense amplifier and precision servo loop on the CLPROG pin. A single 1% resistor (e.g., 3.01 kΩ) from CLPROG to GND sets the target current; the IC adjusts switching duty cycle until CLPROG reaches 1.188 V, corresponding to a known fraction (hCLPROG) of actual VBUS current. This eliminates the need for a high-power, accuracy-critical shunt resistor while maintaining ±3% current limit accuracy across temperature.
Can the LTC4098EPDC-1#TRPBF operate with only a USB input, or is an external high-voltage regulator required?
The LTC4098EPDC-1#TRPBF operates fully autonomously with only a USB (or wall adapter) input-its integrated 2.25 MHz switching regulator powers VOUT and charges the battery directly. The WALL/ACPR/VC pins are optional and used only when adding an external high-voltage DC/DC (e.g., LT3653) for automotive or Firewire inputs. Leaving WALL open disables HV mode and defaults to USB-only operation with no impact on functionality.
What is the role of the D0, D1, and D2 pins on the LTC4098EPDC-1#TRPBF?
The D0, D1, and D2 pins form a 3-bit digital input that configures multiple operating parameters of the LTC4098EPDC-1#TRPBF: USB current limit mode (1x/5x/10x), suspend mode selection (low/high power), and battery charger enable/disable state. These pins are weakly pulled low internally; connecting them to VBUS or GND selects specific combinations per Table 1 in the datasheet-enabling hardware-only configuration without MCU intervention.
Does the LTC4098EPDC-1#TRPBF support battery temperature monitoring, and how is it implemented?
Yes, the LTC4098EPDC-1#TRPBF supports battery temperature monitoring via dedicated NTCBIAS and NTC pins. NTCBIAS provides a stable bias current to a negative-temperature-coefficient thermistor connected between NTC and GND. The IC compares the resulting voltage to internal thresholds to detect cold (<0°C) and hot (>45°C) faults, pausing charging until the battery returns to a safe temperature range. This hardware-based monitoring requires no MCU firmware and operates independently of system power state.
LTC4098EPDC-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PowerPath™
- Package/Case:
- 20-UFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Multi-Function Controller
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Fault Protection:
- Over Voltage
- Interface:
- USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
LTC4098EPDC-1#TRPBF FAQ
1.How can I place an order for LTC4098EPDC-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4098EPDC-1#TRPBF 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 LTC4098EPDC-1#TRPBF reliable?
The price and inventory of LTC4098EPDC-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4098EPDC-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4098EPDC-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4098EPDC-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4098EPDC-1#TRPBF?
LTC4098EPDC-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4098EPDC-1#TRPBF 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 LTC4098EPDC-1#TRPBF?
For technical support, including LTC4098EPDC-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4098EPDC-1#TRPBF requirements.
6.How does Aetrix verify that LTC4098EPDC-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4098EPDC-1#TRPBF 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 LTC4098EPDC-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4098EPDC-1#TRPBF?
All LTC4098EPDC-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4098EPDC-1#TRPBF, 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 LTC4098EPDC-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC4098EPDC-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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