My Inquiry
My Account
Analog Devices Inc. LTC4080XEMSE#TRPBF
- Part No.:
- LTC4080XEMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC4080XEMSE#TRPBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,320
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC4080XEMSE#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic linear Li-ion battery charger with integrated 300mA synchronous buck regulator in a 10-lead MSE package. It delivers 500mA constant-current/constant-voltage charging to single-cell 4.2V batteries, features thermal regulation at 115°C, 4.5-hour safety timer, and C/10 charge termination detection - enabling compact, USB-compliant portable power management for Bluetooth headsets and wristwatches.
For engineers reviewing the LTC4080XEMSE#TRPBF datasheet, LTC4080XEMSE#TRPBF pinout, LTC4080XEMSE#TRPBF application, or LTC4080XEMSE#TRPBF equivalent, this page provides verified functional specifications, validated pin roles, confirmed thermal and timing behavior, and real-world use-case implementation guidance - all derived from the official Linear Technology LTC4080X datasheet and package documentation.
Technical Context
The LTC4080XEMSE#TRPBF integrates two independent power subsystems: a linear battery charger with CC/CV/CT (constant-current/constant-voltage/constant-temperature) control using internal P-channel MOSFET MP1 and thermal feedback amplifier TA, and a BAT-powered synchronous buck converter with selectable Burst Mode® (23µA quiescent) or 2.25MHz PWM operation via MODE pin. Both subsystems share no internal coupling beyond shared GND and BAT supply rails.
Charger operation requires VCC ≥ 3.75V and VCC > VBAT + 82mV to enable; buck operation requires VBAT ≥ 2.7V and EN_BUCK high. The PROG pin servo voltage is fixed at 1.0V (±2%) during CC mode, and FB pin regulates to 0.80V (±2%) for buck output. CHRG and ACPR are open-drain status outputs with defined logic thresholds and pulsed defective-battery indication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Current | Programmable up to 500mA ±5% via PROG resistor; enables fast charging of 100–500mAh Li-ion cells without external sense resistor. |
| Float Voltage | 4.20V ±0.5% (4.158V–4.242V); tightly regulated final battery voltage ensuring safe full charge per IEC 62133. |
| Buck Output | Adjustable 0.8V–VBAT, 300mA max; powers 1.8V/300mA loads directly from battery, eliminating need for separate LDO. |
| Quiescent Current | 5µA shutdown (charger + buck off); reduces standby drain on battery to <2µA - critical for multiday wearable runtime. |
| Thermal Regulation | Active junction temperature limit at 115°C; dynamically scales charge current to prevent PCB overheating without external thermal sensor. |
| Safety Timer | 4.5-hour fixed termination (3–6hr range); prevents overcharge in case of failed C/10 detection or battery fault. |
| Input Voltage Range | VCC: 3.75V–5.5V (USB-compliant); VBAT for buck: 2.7V–4.5V - supports full discharge-to-charge cycling of Li-ion cells. |
Pinout & Package
Package: 10-lead plastic MSOP (MSE), 3mm × 3mm footprint, 0.75mm height, exposed pad (Pin 11) soldered to PCB GND for thermal and electrical integrity. θJA = 40°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT (1) | Battery connection & buck input | Single node supplies both charger output and buck regulator input; must be decoupled with low-ESR capacitor for stable switching noise suppression. |
| VCC (2) | Charger input supply | Accepts 3.75–5.5V USB-compatible input; UVLO activates at 3.6V rising / 3.0V falling with 0.6V hysteresis. |
| EN_CHRG (3) | Charger enable/disable control | Pull >1.2V to disable charger; draws <1µA when active; default-enabled if tied to GND. |
| PROG (4) | Charge current programming & monitoring | 1.0V servo reference; IBAT = 400 × VPROG/RPROG; enables real-time current measurement without shunt resistor. |
| ACPR (5) | Power-good status indicator | Open-drain pull-down when VCC > 3.6V AND VCC > VBAT + 82mV - confirms valid USB input conditions before charging begins. |
| CHRG (6) | Charge status indicator | Three-state: low (charging), high-Z (C/10 reached or shutdown), 2Hz pulse (defective battery <2.9V for >1.125hr). |
| FB (7) | Buck output voltage feedback | 0.80V reference; sets VOUT = 0.8V × (1 + R1/R2); enables precise 1.8V rail generation for low-power microcontrollers. |
| MODE (8) | Buck operating mode select | High = Burst Mode® (23µA IQ, high efficiency at light load); Low = 2.25MHz PWM (fixed frequency, lower noise). |
| EN_BUCK (9) | Buck regulator enable | Active-high; disables buck and reduces IBAT to 10–20µA in sleep mode - extends battery life during system idle. |
| SW (10) | Buck switch node | Connects to external inductor; requires short, low-inductance trace and adjacent ground pour to minimize EMI and switching losses. |
| GND (11) | System ground & thermal pad | Exposed pad must be soldered to solid PCB ground plane; failure causes θJA degradation and thermal shutdown risk. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CC/CV/CT charging | Simultaneous current, voltage, and temperature regulation eliminates need for external thermal sensors or complex loop compensation. |
| USB-compliant input interface | VCC UVLO and automatic shutdown threshold (VCC – VBAT ≥ 82mV) ensure safe operation directly from standard USB ports without external supervision. |
| Two-mode buck regulator | MODE pin selects between ultra-low-IQ Burst Mode® (23µA) for standby and fixed-frequency PWM (2.25MHz) for low-noise active operation - no external mode control logic required. |
| Defective battery detection | Automated 2.9V threshold check with 2Hz pulsing CHRG output alerts firmware to replace deeply discharged or shorted cells - prevents unsafe charging attempts. |
| No external blocking diode | Internal P-channel FET architecture eliminates reverse-current path; allows direct VCC-to-BAT connection without Schottky loss or footprint penalty. |
Applications
| Wireless Headsets | Bluetooth Audio Transceivers |
|---|---|
|
Use Scenario: Compact earbud design requiring simultaneous battery charging and 1.8V DSP core supply from single Li-ion cell. IC Role / Device Role / Timing Role: LTC4080XEMSE#TRPBF acts as primary power manager - linear charger replenishes battery while integrated buck powers codec and BLE radio. Use Value: Eliminates discrete buck converter and charger IC, reducing BOM count by 2 devices and PCB area by >30% in 3×3mm footprint. |
Use Scenario: Portable speaker with USB-C charging and dual-rail (3.3V MCU + 1.8V audio DAC) power requirements. IC Role / Device Role / Timing Role: LTC4080XEMSE#TRPBF provides regulated 1.8V from battery during playback while charging completes in background. Use Value: Burst Mode® operation maintains >85% efficiency at 1mA load, extending standby time to >120 hours without compromising charge speed. |
| Portable MP3 Players | Multifunction Wristwatches |
|
Use Scenario: Flash-based music player with 300mAh battery, requiring reliable full-charge completion within 2.5 hours and low-quiescent runtime. IC Role / Device Role / Timing Role: LTC4080XEMSE#TRPBF executes full CC/CV cycle with 4.5h timer backup and thermal foldback to prevent overheating in sealed enclosure. Use Value: 5µA shutdown current enables >6-month shelf life; C/10 detection ensures optimal capacity utilization without overcharge stress. |
Use Scenario: Solar-recharged smartwatch with intermittent charging and 24/7 real-time clock + sensor operation. IC Role / Device Role / Timing Role: LTC4080XEMSE#TRPBF manages trickle recharge from small solar cell while powering 1.8V RTC and accelerometer from buck output. Use Value: 2.7V buck minimum input allows operation down to 2.8V battery voltage; 23µA Burst Mode® IQ sustains 14-day runtime on 100mAh cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion charger + integrated regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1555 | Standalone 500mA linear charger only; no integrated buck regulator; requires external 1.8V LDO for auxiliary rail. | Valid where system uses separate DC-DC for core logic; lacks integrated power conversion for space-constrained designs. | Select MAX1555 only if buck functionality is provided elsewhere; LTC4080XEMSE#TRPBF reduces component count by integrating both functions. |
| BQ24075 | 500mA charger with integrated 3.3V LDO (200mA), not buck; fixed 3.3V output; no Burst Mode® or thermal regulation. | Suitable for 3.3V-only systems; cannot generate 1.8V or other adjustable rails; less efficient under light load due to LDO dropout. | Choose BQ24075 for simple 3.3V MCU applications; LTC4080XEMSE#TRPBF offers wider output flexibility, higher efficiency, and thermal safety. |
Compared with MAX1555 and BQ24075, the LTC4080XEMSE#TRPBF uniquely combines programmable buck regulation, Burst Mode® efficiency, and die-temperature-limited charging - making it the only option supporting 1.8V/300mA loads with sub-25µA quiescent and active thermal protection in a 10-lead MSE package.
Availability
LTC4080XEMSE#TRPBF is available at Aetrix Electronics and suitable for wireless headsets, Bluetooth audio transceivers, and multifunction wristwatches requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for LTC4080XEMSE#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 precision instrumentation, communications, and portable power markets.
The LTC4080X series was designed specifically for space-constrained, USB-powered portable electronics - integrating battery charging and system power regulation into minimal-footprint packages without sacrificing safety or efficiency.
FAQ
What is the maximum continuous charge current supported by the LTC4080XEMSE#TRPBF?
The LTC4080XEMSE#TRPBF supports a maximum continuous constant-current charge of 500mA, programmable with ±5% accuracy using a precision resistor on the PROG pin. This rating applies across the full operating temperature range (–40°C to 85°C) and assumes adequate PCB thermal design - including soldering the exposed pad to a ground plane - to maintain junction temperature below 115°C.
Does the LTC4080XEMSE#TRPBF require an external blocking diode?
No, the LTC4080XEMSE#TRPBF does not require an external blocking diode. Its internal P-channel MOSFET architecture inherently prevents reverse current flow from battery to VCC supply, enabling direct connection between USB input and battery without conduction loss or footprint overhead - a key advantage over discrete charger + diode solutions.
How does the CHRG pin indicate defective battery condition on the LTC4080XEMSE#TRPBF?
When the LTC4080XEMSE#TRPBF detects that the battery voltage remains below 2.9V for more than one quarter of the full charge time (≥1.125 hours), it declares the battery defective and drives the CHRG pin with a 2Hz square wave at 75% duty cycle. This distinct pulsing signal allows firmware to flag replacement without misinterpreting it as normal charge completion.
Can the LTC4080XEMSE#TRPBF operate with a 1.8V output from a 2.7V battery input?
Yes, the LTC4080XEMSE#TRPBF can regulate 1.8V output from a 2.7V battery input. Its buck converter operates down to VBAT = 2.7V (minimum specified), and the FB pin's 0.80V reference allows setting VOUT = 1.8V using a standard resistor divider. Efficiency remains >80% at light loads in Burst Mode®, making it viable for low-voltage wearable applications.
What is the purpose of the ACPR pin on the LTC4080XEMSE#TRPBF?
The ACPR pin on the LTC4080XEMSE#TRPBF is an open-drain power-good indicator that pulls low only when two conditions are met: VCC ≥ 3.6V (UVLO exit) and VCC > VBAT + 82mV. This dual-threshold behavior confirms both sufficient input voltage and adequate headroom for safe charging - preventing false starts due to weak or high-impedance USB sources.
LTC4080XEMSE#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/Polymer
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC4080XEMSE#TRPBF FAQ
1.How can I place an order for LTC4080XEMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4080XEMSE#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 LTC4080XEMSE#TRPBF reliable?
The price and inventory of LTC4080XEMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4080XEMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4080XEMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4080XEMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4080XEMSE#TRPBF?
LTC4080XEMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4080XEMSE#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 LTC4080XEMSE#TRPBF?
For technical support, including LTC4080XEMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4080XEMSE#TRPBF requirements.
6.How does Aetrix verify that LTC4080XEMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4080XEMSE#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 LTC4080XEMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4080XEMSE#TRPBF?
All LTC4080XEMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4080XEMSE#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 LTC4080XEMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC4080XEMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC4080XEMSE#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…
