My Inquiry
My Account
Analog Devices Inc. LTC4080EMSE#TRPBF
- Part No.:
- LTC4080EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC4080EMSE#TRPBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,433
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC4080EMSE#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic 500mA linear Li-ion battery charger with integrated 300mA synchronous buck converter, operating from 3.75V to 5.5V input and delivering regulated output from 0.8V to VBAT. It features thermal regulation at 115°C, 4.5-hour safety timer, C/10 charge termination detection, and Burst Mode® operation for ultra-low quiescent current - designed for USB-powered portable devices including Bluetooth headsets and MP3 players.
For engineers reviewing the LTC4080EMSE#TRPBF datasheet, LTC4080EMSE#TRPBF pinout, LTC4080EMSE#TRPBF application, or LTC4080EMSE#TRPBF equivalent, key selection criteria include integrated buck supply capability, dual-mode (PWM/Burst) regulator control, thermal feedback architecture, and compliance with USB power constraints - all within a compact 10-lead MSOP package with exposed pad.
Technical Context
The LTC4080EMSE#TRPBF integrates two independent power subsystems: a constant-current/constant-voltage linear charger with thermal foldback and a BAT-powered synchronous buck regulator. Its charge algorithm uses three parallel feedback loops (CA, VA, TA) to enforce simultaneous CC/CV/CT operation - enabling safe high-current charging without external thermal sensors.
The buck converter operates from the BAT pin (2.7V–4.5V), supports programmable output voltage via FB divider (0.8V reference), and offers MODE-pin-selectable 2.25MHz PWM or 23µA Burst Mode® operation. Both subsystems share ground and thermal sensing but operate autonomously - allowing concurrent charging and load powering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Current | Up to 500mA with ±5% accuracy; set by single PROG resistor; enables fast charging of 1-cell Li-ion in space-constrained USB devices. |
| Float Voltage | 4.2V ±0.5%; precision internal resistor divider ensures battery longevity and safety per JEITA guidelines. |
| Buck Output | 0.8V to VBAT; adjustable via external FB divider; supports low-voltage logic rails (e.g., 1.8V core supply) directly from battery. |
| Buck Max Current | 300mA continuous; sufficient for RF transceivers, audio codecs, or microcontrollers in portable wearables. |
| Quiescent Current | 5µA shutdown (charger + buck off); 23µA in Burst Mode no-load; extends battery runtime during standby. |
| Thermal Regulation | 115°C junction limit; dynamically reduces charge current to prevent overheating on PCBs with limited copper area. |
| Safety Timer | 4.5-hour fixed duration; terminates charge if C/10 not reached, preventing overcharge in faulty or deeply discharged batteries. |
Pinout & Package
Package: 10-lead plastic MSOP with exposed pad (pin 11 = GND), 3mm × 3mm footprint, 0.75mm profile, θJA = 40°C/W. Exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT (1) | Battery connection & buck input | Supplies charge current to Li-ion cell and powers buck converter; decoupling capacitor required for low-noise switching. |
| VCC (2) | Charger input supply | Accepts 3.75–5.5V USB-compliant input; UVLO at 3.6V prevents charging under insufficient supply conditions. |
| EN_CHRG (3) | Charger enable control | Active-low logic input; pull high (>1.2V) to disable charger and reduce battery drain to <2µA. |
| PROG (4) | Charge current programming | 1V servo node; IBAT = 400 × VPROG/RPROG; enables real-time current monitoring and thermal foldback visibility. |
| ACPR (5) | Power status indicator | Open-drain output pulled low when VCC > 3.6V and VCC > VBAT + 82mV - confirms valid USB power availability. |
| CHRG (6) | Charge status indicator | Open-drain output: low = charging, high-Z = C/10 reached or timer expired, 2Hz pulse = defective battery detection. |
| FB (7) | Buck output voltage feedback | 0.8V reference input; sets VOUT via R1/R2 divider; enables precise low-voltage rail generation (e.g., 1.8V @ ±1%). |
| MODE (8) | Buck operating mode select | High = Burst Mode® (23µA IQ); low = fixed-frequency PWM (2.25MHz); eliminates need for external mode control logic. |
| EN_BUCK (9) | Buck regulator enable | Active-high logic input; independent control allows buck to run while charger is disabled (or vice versa). |
| SW (10) | Buck switch node | Connects to external inductor; requires short trace routing and proximity to minimize EMI and switching losses. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-power system | Single-chip solution replaces discrete charger + DC/DC, reducing BOM count by ≥7 components and saving >15mm² PCB area. |
| Thermal regulation with current foldback | Automatically throttles charge current above 115°C junction temperature - eliminates need for external thermal sensors or derating tables. |
| C/10 charge termination detection | CHRG pin transitions to high-impedance state at 10% of programmed current - enables LED or MCU-driven end-of-charge signaling without analog comparator. |
| Burst Mode® operation | Reduces no-load buck input current to 23µA - extends battery life in always-on applications like smartwatches or wireless sensors. |
| USB-compliant input interface | VCC UVLO (3.6V) and automatic shutdown when VCC < VBAT + 32mV ensure safe operation from standard USB ports without external protection circuitry. |
Applications
| Wireless Headsets | Bluetooth Audio Modules |
|---|---|
Use Scenario: Compact rechargeable headset with integrated microphone and stereo DAC requiring simultaneous battery charging and low-noise 1.8V audio supply. IC Role / Device Role / Timing Role: LTC4080EMSE#TRPBF acts as primary power management IC - managing Li-ion charge profile while generating clean 1.8V rail for codec and Bluetooth radio from same battery. Use Value: Eliminates separate LDO or buck converter; Burst Mode® maintains >100hr standby time; thermal regulation prevents overheating during rapid charging in sealed enclosure. | Use Scenario: Small-form-factor Bluetooth speaker with USB-C charging and Class-D amplifier needing stable 3.3V logic and 5V analog supply. IC Role / Device Role / Timing Role: LTC4080EMSE#TRPBF provides constant-current charging and powers auxiliary 3.3V rail via buck; VCC input accepts USB 5V directly. Use Value: Integrated ACPR pin confirms USB power presence before enabling charge; C/10 detection synchronizes firmware sleep entry with full charge completion. |
| Portable MP3 Players | Multifunction Wristwatches |
Use Scenario: Battery-powered music player with OLED display, SD card interface, and audio playback requiring efficient power conversion and long runtime. IC Role / Device Role / Timing Role: LTC4080EMSE#TRPBF delivers 500mA charge current and supplies 1.2V core voltage to ARM Cortex-M0+ MCU while maintaining battery health. Use Value: 4.5-hour safety timer prevents overcharge damage; trickle charge below 2.9V safely recovers deeply discharged cells; soft-start limits inrush into 4.7µF input cap. | Use Scenario: Smartwatch with heart-rate sensor, accelerometer, and BLE radio operating from coin-cell-sized Li-ion battery. IC Role / Device Role / Timing Role: LTC4080EMSE#TRPBF serves as complete power subsystem - charging battery from magnetic USB dock while powering 1.8V sensor hub and 3.3V radio from buck output. Use Value: 5µA shutdown current preserves battery during multi-week storage; exposed-pad MSOP package fits tight wristband form factor; MODE pin enables firmware-controlled efficiency optimization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion charger + integrated buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24075RGER | 500mA linear charger only; no integrated buck converter; requires external DC/DC for system rail generation. | Suitable where system voltage matches battery or external regulator is already present; lacks on-chip power conversion. | Select when cost sensitivity outweighs integration benefit and board space permits external buck. |
| MAX1555ESA+ | Charger-only IC with USB enumeration support; no buck regulator; includes D+/D− detection for host negotiation. | Preferred for USB-host-aware designs requiring automatic current limit selection (100mA/500mA); no system power rail capability. | Choose when USB compliance (BC1.2, enumeration) is mandatory and secondary power rail is generated elsewhere. |
Compared with BQ24075RGER and MAX1555ESA+, the LTC4080EMSE#TRPBF uniquely combines full-featured charging with an efficient, MODE-selectable buck regulator - reducing component count, PCB area, and design complexity for self-contained portable systems requiring both battery management and regulated system voltage.
Availability
LTC4080EMSE#TRPBF is available at Aetrix Electronics and suitable for wireless headsets, Bluetooth audio modules, and portable MP3 players requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC4080EMSE#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and consumer markets.
The LTC4080 belongs to Linear's Power Management product line, engineered specifically for space-constrained, battery-powered portable electronics demanding high integration, USB compatibility, and thermal robustness without sacrificing efficiency or safety.
FAQ
What is the maximum charge current supported by the LTC4080EMSE#TRPBF?
The LTC4080EMSE#TRPBF supports a maximum charge current of 500mA with ±5% accuracy, set by a single external resistor connected between the PROG pin and ground. This value is confirmed across the –40°C to 85°C operating temperature range and remains stable under thermal regulation up to 115°C junction temperature. The LTC4080EMSE#TRPBF achieves this using an internal P-channel MOSFET with 750mΩ on-resistance at 350mA and 4V VCC.
How does the LTC4080EMSE#TRPBF handle thermal regulation during charging?
The LTC4080EMSE#TRPBF implements constant-temperature (CT) regulation via an internal transconductance amplifier (TA) that activates at ~115°C junction temperature, progressively reducing charge current to maintain thermal equilibrium. This CT loop operates in parallel with CC and CV loops, and the PROG pin voltage continues to reflect the actual charge current during foldback. The LTC4080EMSE#TRPBF does not require external thermal sensors or PCB copper pour adjustments to meet safety standards.
Can the LTC4080EMSE#TRPBF generate a 1.8V output for a microcontroller core rail?
Yes, the LTC4080EMSE#TRPBF can generate a precise 1.8V output using its integrated synchronous buck converter. With the FB pin reference at 0.8V, a resistor divider (e.g., R1 = 100kΩ, R2 = 80.6kΩ) sets VOUT = 0.8V × (1 + R1/R2) ≈ 1.8V. Performance data shows <±1% output variation over load (1µA–300mA) and temperature (–40°C to 85°C), making it suitable for MCU core supplies. The LTC4080EMSE#TRPBF supports this output while simultaneously charging the battery from VCC.
What is the purpose of the ACPR pin on the LTC4080EMSE#TRPBF?
The ACPR (Adapter Present) pin on the LTC4080EMSE#TRPBF is an open-drain status output that pulls low when two conditions are met: VCC exceeds 3.6V (UVLO threshold) and VCC is at least 82mV above the BAT voltage - confirming valid USB power availability for safe charging. When either condition fails, ACPR goes high-impedance. This signal enables host MCU firmware to validate input source integrity before initiating charge, and the LTC4080EMSE#TRPBF guarantees ACPR leakage <1µA across temperature.
Does the LTC4080EMSE#TRPBF support automatic recharge after battery voltage drops?
Yes, the LTC4080EMSE#TRPBF supports automatic recharge: when the battery voltage falls below VFLOAT – 100mV (typically 4.1V) after full charge, the device restarts the charge cycle without external intervention. This behavior is enabled by default and requires no configuration. The LTC4080EMSE#TRPBF also includes a 2.25-hour recharge timer and 75mV hysteresis to prevent oscillation near the recharge threshold, ensuring reliable operation in cyclic-use applications like portable speakers.
LTC4080EMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- -
- Charge Current - Max:
- 525mA
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 5.5V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC4080EMSE#TRPBF FAQ
1.How can I place an order for LTC4080EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4080EMSE#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 LTC4080EMSE#TRPBF reliable?
The price and inventory of LTC4080EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4080EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4080EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4080EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4080EMSE#TRPBF?
LTC4080EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4080EMSE#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 LTC4080EMSE#TRPBF?
For technical support, including LTC4080EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4080EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC4080EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4080EMSE#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 LTC4080EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4080EMSE#TRPBF?
All LTC4080EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4080EMSE#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 LTC4080EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC4080EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC4080EMSE#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…
