My Inquiry
My Account
Analog Devices Inc. LTC4097EDDB#TRPBF
- Part No.:
- LTC4097EDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC4097EDDB#TRPBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,218
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC4097EDDB#TRPBF from Analog Devices (formerly Linear Technology) is a standalone linear Li-ion/polymer battery charger IC supporting dual-input (DC wall adapter and USB) power source selection, fixed 4.2V float voltage with ±0.6% accuracy, programmable charge current up to 800mA (DCIN) or 500mA (USBIN), and integrated thermal regulation at 115°C junction temperature. It serves as the primary charging controller in portable consumer electronics requiring automatic input prioritization and NTC-based temperature qualification.
For engineers reviewing the LTC4097EDDB#TRPBF datasheet, LTC4097EDDB#TRPBF pinout, LTC4097EDDB#TRPBF application, or LTC4097EDDB#TRPBF equivalent, key selection criteria include independent DC/USB current programming via IDC/IUSB pins, ITERM-based termination threshold setting, VNTC-powered NTC biasing with 120mA drive capability, and thermal feedback for safe high-current operation in compact DFN packages.
Technical Context
The LTC4097EDDB#TRPBF implements a constant-current/constant-voltage (CC/CV) charging algorithm with automatic input arbitration: DCIN has priority over USBIN when both exceed UVLO thresholds (VDCIN > 4.22V, VUSBIN > 4.0V) and maintain ≥30mV headroom above BAT. Internal P-channel MOSFETs eliminate need for external blocking diodes, while on-resistance is 420mΩ (DCIN→BAT) and 470mΩ (USBIN→BAT).
Thermal regulation operates via die-temperature sensing, reducing charge current when junction temperature approaches 115°C; hard thermal shutdown activates at ~150°C. The ITERM pin uses a filtered comparator (3ms delay) to detect termination, preventing false triggers from transient BAT loads. Trickle charge engages below 2.9V BAT, delivering 1/10th programmed current until threshold is crossed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Float Voltage | 4.2V ±0.6% - ensures precise single-cell Li-ion full-charge termination without overvoltage risk. |
| Max DCIN Charge Current | 800mA (RIDC = 1.24kΩ) - supports fast wall-adapter charging with resistor-programmable precision. |
| Max USBIN Charge Current | 500mA (RIUSB = 2kΩ, HPWR = HIGH) - configurable USB compliance mode with 20%/100% scaling. |
| Charge Termination Threshold | 50mA (RITERM = 2kΩ) - user-defined cutoff point enabling reliable end-of-charge detection. |
| Operating Temp Range | –40°C to +85°C - validated performance across industrial and consumer ambient conditions. |
| Junction Thermal Limit | 115°C constant-temperature regulation - dynamically throttles current to prevent overheating during sustained high-power operation. |
| Shutdown Supply Current | 20µA (DCIN), 10µA (USBIN) - ultra-low quiescent draw preserves system battery life when disabled. |
Pinout & Package
Package: 12-lead (3mm × 2mm) DFN with exposed pad (Pin 13 = GND), 0.75mm profile, thermally enhanced for high-power linear operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DCIN (Pin 1) | Wall adapter input supply | Accepts 4.25–5.5V; powers charger and enables VNTC bias; max 1.2A continuous current. |
| USBIN (Pin 2) | USB input supply | Accepts 4.25–5.5V; second priority power source; max 1.1A continuous current. |
| VNTC (Pin 3) | NTC bias voltage output | Provides regulated 4.25–5.5V bias; sources up to 120mA; indicates valid input power presence. |
| CHRG (Pin 4) | Open-drain charge status | Pulled low during active charge; high-Z at termination/shutdown; sinks ≤10mA for LED indication. |
| SUSP (Pin 5) | Charge enable control | Logic low = enabled; internal 3.4MΩ pulldown defaults to active; logic high = shutdown mode. |
| NTC (Pin 6) | NTC thermistor input | Monitors battery temperature via voltage divider; suspends charge if cold (>0.765×VNTC) or hot (<0.349×VNTC). |
| HPWR (Pin 7) | USB high-power enable | Logic high = 100% RIUSB-programmed current; logic low = 20% current; internal 3.4MΩ pulldown. |
| ITERM (Pin 8) | Termination threshold set | Resistor-to-GND sets ITERMINATE = 100mV/RITERM; filtered comparator triggers termination after 3ms hold. |
| IUSB (Pin 9) | USB charge current program | Servos to 1.0V in CC mode; IBAT_USB = 1000 × VIUSB / RIUSB; enables real-time current monitoring. |
| IDC (Pin 10) | DC charge current program | Servos to 1.0V in CC mode; IBAT_DC = 1000 × VIDC / RIDC; enables real-time current monitoring. |
| GND (Pin 11) | Analog/digital ground | Reference for all analog circuitry; connects to PCB ground plane and exposed pad. |
| BAT (Pin 12) | Battery output terminal | Delivers regulated CC/CV charge current; floats at 4.2V; connects directly to single-cell Li-ion anode. |
| Exposed Pad (Pin 13) | Thermal & electrical ground | Mandatory solder connection to PCB ground plane for thermal dissipation (θJA = 60°C/W) and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-input automatic source selection | DCIN prioritized over USBIN based on voltage thresholds and BAT headroom; no external logic required. |
| Independent charge current programming | RIDC sets DCIN current (up to 800mA); RIUSB sets USBIN current (up to 500mA); HPWR scales USB current 5:1. |
| Integrated thermal regulation | Reduces charge current before reaching 115°C junction temperature; prevents thermal runaway in sealed enclosures. |
| NTC-based temperature qualified charging | Uses VNTC-biased resistive divider to suspend charge outside safe battery temp range (0°C–40°C typical). |
| Low-quiescent shutdown mode | Draws only 20µA from DCIN or 10µA from USBIN while maintaining <2µA battery drain - ideal for long-storage devices. |
| Trickle and auto-recharge support | Charges deeply discharged cells (<2.9V) at 1/10th rate; restarts charging when BAT drops below 4.1V (~85% SOC). |
Applications
| Smartphone Power Management | Wireless Headphone Charging |
|---|---|
Use Scenario: Integrated battery charging in space-constrained smartphones with dual-input (USB-C and proprietary wall adapter) support. IC Role / Device Role / Timing Role: Primary linear charger IC managing CC/CV profile, input arbitration, and thermal safety for 1S Li-ion pack. Use Value: Eliminates need for external sense resistors or diodes; enables compact layout with 3mm × 2mm DFN footprint and minimal BOM count. |
Use Scenario: Fast, safe charging of compact true-wireless stereo (TWS) earbud cases using USB power and optional higher-current adapter. IC Role / Device Role / Timing Role: Dual-path linear charger with HPWR-controlled USB current scaling and NTC monitoring for small-form-factor battery packs. Use Value: Supports 20% USB current limit for standard ports and 100% for high-power adapters; thermal regulation prevents case overheating during rapid charge. |
| Portable Medical Monitor | Bluetooth Speaker Battery System |
Use Scenario: Rechargeable handheld vital sign monitor requiring reliable, temperature-qualified charging in clinical environments. IC Role / Device Role / Timing Role: Safety-critical battery charger with cold/hot fault detection, trickle recovery, and low-shutdown current for extended standby. Use Value: NTC interface meets IEC 62368-1 thermal safety requirements; 2µA battery drain preserves charge during multi-week deployments. |
Use Scenario: Mid-tier portable Bluetooth speaker with dual-input charging (USB and 5V wall adapter) and LED charge-status indication. IC Role / Device Role / Timing Role: Standalone charger IC driving CHRG output to LED and regulating 4.2V float for 1S Li-ion battery. Use Value: Open-drain CHRG output sinks 10mA - directly drives indicator LED without external transistor; eliminates discrete driver components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-input Li-ion charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24075RGTR | Fixed 4.2V float, 1.5A max DCIN current, no independent USB/DC current programming; uses single ISET pin for both inputs. | Lacks HPWR-scaling and separate IUSB/IDC pins; requires external diode for input isolation; no VNTC power-present output. | Select when higher DCIN current (1.5A) is needed and USB/DC current matching is acceptable; avoid when independent current control or NTC biasing is required. |
| MAX1555ESA+ | Fixed 4.2V float, 500mA max USB current only; no DCIN input; no thermal regulation; no NTC interface. | USB-only solution; no wall adapter support; no temperature qualification; no thermal feedback loop. | Select only for USB-limited, cost-sensitive designs where wall adapter charging and thermal safety are not required. |
Compared with BQ24075RGTR and MAX1555ESA+, the LTC4097EDDB#TRPBF uniquely provides independent DC/USB current programming, integrated VNTC biasing for NTC circuits, and active thermal regulation - making it optimal for compact, thermally demanding dual-input portable systems.
Availability
LTC4097EDDB#TRPBF is available at Aetrix Electronics and suitable for smartphone power management, wireless headphone charging, and portable medical monitor applications requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for LTC4097EDDB#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 LTC4097EDDB#TRPBF belongs to Linear's legacy battery management IC portfolio, designed specifically for compact, dual-input Li-ion charging in consumer and portable medical devices where thermal safety, input flexibility, and minimal external components are critical.
FAQ
What is the maximum charge current supported by the LTC4097EDDB#TRPBF from a wall adapter input?
The LTC4097EDDB#TRPBF supports up to 800mA from the DCIN input when configured with a 1.24kΩ resistor from IDC to GND. This value is derived from the formula IBAT_DC = 1000 × VIDC / RIDC, where VIDC regulates to 1.0V in constant-current mode. Higher currents require lower resistance values but must remain within the device's 1.2A absolute maximum DCIN pin rating and thermal limits.
How does the LTC4097EDDB#TRPBF handle simultaneous presence of DCIN and USBIN power sources?
The LTC4097EDDB#TRPBF automatically selects DCIN as the primary source when both inputs are present and valid - defined as VDCIN > 4.22V and VDCIN > BAT + 30mV. If DCIN falls below these thresholds, it seamlessly switches to USBIN. This behavior is implemented in hardware with no firmware or external control required, ensuring robust power path management.
Can the LTC4097EDDB#TRPBF be used without an NTC thermistor?
Yes - the NTC function is optional. Leaving the NTC pin unconnected or tying it to GND disables temperature monitoring. The LTC4097EDDB#TRPBF will operate normally with full charging functionality, though thermal regulation (junction-based) remains active. For safety-critical applications, Analog Devices recommends retaining NTC monitoring to comply with battery manufacturer temperature specifications.
What is the purpose of the HPWR pin on the LTC4097EDDB#TRPBF, and how does it affect USB charging?
The HPWR pin on the LTC4097EDDB#TRPBF controls USB charge current scaling: logic HIGH enables 100% of the current set by RIUSB, while logic LOW reduces it to 20%. This allows compliance with USB 2.0 (100mA) or USB Battery Charging v1.2 (500mA/1.5A) specifications. An internal 3.4MΩ pulldown defaults HPWR to LOW, ensuring safe default operation unless explicitly asserted.
Does the LTC4097EDDB#TRPBF support trickle charging for deeply discharged batteries?
Yes - the LTC4097EDDB#TRPBF initiates trickle charge when BAT voltage falls below 2.9V, delivering 1/10th of the full programmed current (e.g., 80mA if RIDC = 1.24kΩ). This gently raises cell voltage to a safe level before transitioning to constant-current mode, protecting Li-ion cells from damage due to excessive current at low SOC states.
LTC4097EDDB#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current
- Fault Protection:
- -
- Charge Current - Max:
- 1.2A
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 5.5V
- Interface:
- USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (3x2)
LTC4097EDDB#TRPBF FAQ
1.How can I place an order for LTC4097EDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4097EDDB#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 LTC4097EDDB#TRPBF reliable?
The price and inventory of LTC4097EDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4097EDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4097EDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4097EDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4097EDDB#TRPBF?
LTC4097EDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4097EDDB#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 LTC4097EDDB#TRPBF?
For technical support, including LTC4097EDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4097EDDB#TRPBF requirements.
6.How does Aetrix verify that LTC4097EDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4097EDDB#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 LTC4097EDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4097EDDB#TRPBF?
All LTC4097EDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4097EDDB#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 LTC4097EDDB#TRPBF part is unused and in its original packaging.
Return procedure for LTC4097EDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC4097EDDB#TRPBF Tags
-
BQ21040DBVR
Texas Instruments
-
MCP73812T-420I/OT
Microchip Technology
-
MCP73831T-2ACI/OT
Microchip Technology
-
MCP73832T-2ACI/OT
Microchip Technology
-
MCP73831T-2DCI/OT
Microchip Technology
-
MCP73832T-2DCI/OT
Microchip Technology
-
MCP73831T-2ATI/OT
Microchip Technology
-
MCP73832T-2ATI/OT
Microchip Technology
-
MCP73831T-5ACI/OT
Microchip Technology
-
MCP73832T-2ACI/MC
Microchip Technology
-
MCP73831T-2ACI/MC
Microchip Technology
-
MCP73831T-2ATI/MC
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
