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Analog Devices Inc. LTC4064EMSE#TRPBF
- Part No.:
- LTC4064EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC4064EMSE#TRPBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,832
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Product details
Overview
LTC4064EMSE#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic linear Li-ion battery charger IC optimized for backup power applications. It delivers programmable charge current up to 500 mA with ±7% accuracy, regulates float voltage at 4.00 V ±1%, and integrates thermal regulation, NTC temperature monitoring, and automatic recharge-all in a 10-pin MSOP package with exposed ground pad.
For engineers reviewing the LTC4064EMSE#TRPBF datasheet, LTC4064EMSE#TRPBF pinout, LTC4064EMSE#TRPBF application, or LTC4064EMSE#TRPBF equivalent, key selection criteria include 4V float voltage for extended Li-ion lifetime, C/10 charge termination detection, thermistor-based temperature qualification, shutdown current <25 µA, and USB-compatible 4.25–6.5 V input operation.
Technical Context
The LTC4064EMSE#TRPBF implements a constant-current/constant-voltage/constant-temperature (CC/CV/CT) charging algorithm using three independent feedback loops-CA (current), VA (voltage), and TA (temperature)-with diode-OR priority logic to dynamically select the most restrictive mode. Its internal P-channel MOSFET (RON = 375 mΩ) eliminates external sense resistors and blocking diodes.
Charge current is set via a single resistor on the PROG pin (1.5 V reference), while timer duration is configured with an external capacitor on the TIMER pin (3 hr × CTIMER / 0.1 µF). The NTC input supports hot/cold/disable thresholds with hysteresis, and the CHRG/FAULT/ACPR open-drain outputs provide real-time status without pull-up dependencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Float Voltage | 4.00 V ±1% - extends 4.2V Li-ion cell lifetime by reducing stress during long-term standby |
| Max Charge Current | 500 mA (RPROG = 3 kΩ) - programmable via single resistor with ±7% accuracy over –40°C to 85°C |
| Thermal Regulation Threshold | ≈105°C junction - automatically reduces charge current to prevent overheating without external thermal sensors |
| C/10 Termination Detection | Yes - latches CHRG pin to 30 µA weak pull-down when IBAT ≤ 10% of programmed current |
| Shutdown Supply Current | 25 µA max - enables ultra-low battery drain during inactive periods |
| NTC Input Support | Hot/cold/disable thresholds with hysteresis - enables temperature-qualified charging using standard 10 kΩ NTC thermistors |
| Input Voltage Range | 4.25 V to 6.5 V - compatible with USB 5 V and wall adapters; includes 200 mV UVLO hysteresis |
Pinout & Package
Tiny thermally enhanced 10-pin MSOP package (3 mm × 3 mm) with exposed GND pad (Pin 11) requiring PCB soldering for thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHRG (1) | Open-drain charge status output | Pulled low during active charge; transitions to 30 µA weak pull-down at C/10; high-Z after timeout |
| VCC (2) | Positive input supply | Accepts 4.25–6.5 V; enters sleep mode if VCC ≤ VBAT + 35 mV or below UVLO (4.25 V) |
| FAULT (3) | Open-drain fault indicator | Pulled low for defective battery (VBAT < 2.48 V for ¼ timer period) or NTC out-of-range condition |
| TIMER (4) | Timer capacitor connection | CTIMER sets total charge time: Time (hr) = (CTIMER × 3 hr)/0.1 µF; shorted to GND disables timer |
| GND (5, 11) | Ground reference and thermal pad | Pins 5 and 11 are internally connected; exposed pad must be soldered to PCB for thermal integrity |
| NTC (6) | NTC thermistor interface | Detects battery temperature via voltage divider; triggers hold mode if hot (>50°C) or cold (<0°C) |
| PROG (7) | Charge current programming & monitoring | Sets IBAT = (1.5 V / RPROG) × 1000; VPROG proportional to real-time charge current |
| SHDN (8) | Manual shutdown control | Pull to GND to enter shutdown (ICC < 25 µA); threshold is 0.6–1.3 V |
| BAT (9) | Battery charge output | Drives Li-ion cell; internal resistor divider sets 4.00 V float; requires ≥1 µF bypass with 1 Ω series resistor |
| ACPR (10) | AC present status output | Pulled low when VCC > UVLO and VCC > VBAT + 35 mV; high-Z otherwise |
Key Features
| Feature | Design Value |
|---|---|
| 4 V float voltage with ±1% accuracy | Reduces Li-ion capacity degradation during long-term backup use, extending usable life by up to 2× vs 4.2 V charging |
| Integrated thermal regulation | Maintains safe die temperature (~105°C) without external components, enabling higher average charge rates in compact layouts |
| No external MOSFET, sense resistor, or blocking diode | Reduces BOM count to just three passive components (RPROG, CTIMER, NTC network) for basic operation |
| Trickle charge with defective battery detection | Activates at VBAT < 2.48 V; terminates with FAULT assertion if low voltage persists for ¼ timer period |
| Automatic recharge at 3.90 V threshold | Resumes charging when battery self-discharges to 3.90 V, maintaining readiness without user intervention |
Applications
| File Servers & RAID Systems | Storage Products |
|---|---|
Use Scenario: Maintaining real-time clock and configuration memory during AC power loss in enterprise storage controllers. IC Role / Device Role / Timing Role: Standalone Li-ion backup charger providing regulated 4 V float and automatic recharge to preserve volatile SRAM and RTC state. Use Value: Prevents data corruption and system reinitialization by sustaining >72-hour backup runtime with minimal capacity fade over 5+ years. | Use Scenario: Powering non-volatile cache and firmware retention in NAS enclosures and SSD modules. IC Role / Device Role / Timing Role: Monolithic linear charger managing single-cell Li-ion battery health under intermittent thermal stress and variable ambient conditions. Use Value: Enables reliable write-caching during unexpected shutdowns while avoiding overcharge-induced swelling in sealed enclosures. |
| Li-Ion Battery Back-Up | Industrial Control Systems |
Use Scenario: Providing fail-safe power to keep PLC real-time clocks and parameter registers alive during brownouts. IC Role / Device Role / Timing Role: Low-quiescent-current charger with NTC qualification, ensuring safe operation across –40°C to 85°C industrial environments. Use Value: Eliminates need for external thermal protection circuitry while meeting IEC 62368-1 battery safety requirements. | Use Scenario: Supporting battery-backed memory in remote RTUs and edge gateways deployed in unconditioned cabinets. IC Role / Device Role / Timing Role: USB-compatible linear charger with programmable timer and C/10 termination, simplifying compliance with UL 1977 battery management rules. Use Value: Reduces design validation effort by integrating safety timers, temperature cutoff, and end-of-charge signaling in one IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standalone Li-ion linear charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24075RGTR | 4.2 V float voltage; no integrated thermal regulation; requires external sense resistor; 1.5 A max charge current | Better suited for high-current portable devices; lacks 4 V lifetime-optimized float and automatic thermal foldback | Select only if 4.2 V charging and higher current are required; verify external thermal management is implemented |
| MAX1555EZK+T | 4.2 V float; fixed 100 mA charge current; no PROG pin or timer programming; no NTC input | Targeted at ultra-low-cost USB-powered accessories; no programmability or temperature qualification | Choose only for cost-sensitive, fixed-current, non-temperature-critical backup applications |
Compared with BQ24075RGTR and MAX1555EZK+T, the LTC4064EMSE#TRPBF uniquely combines 4 V lifetime-optimized float voltage, integrated thermal regulation, and full NTC support-making it the only option qualified for long-duration, temperature-aware backup systems where battery longevity is critical.
Availability
LTC4064EMSE#TRPBF is available at Aetrix Electronics and suitable for file servers, RAID systems, and industrial control systems requiring stable component supply, long-lifecycle support, and guaranteed availability through 2030.
Supply support for LTC4064EMSE#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.
The LTC4064EMSE#TRPBF belongs to Linear's legacy precision battery management product line, designed specifically for mission-critical backup power applications where Li-ion lifetime, thermal safety, and autonomous operation are paramount.
FAQ
What is the exact float voltage accuracy of the LTC4064EMSE#TRPBF, and why is it specified at 4 V instead of 4.2 V?
The LTC4064EMSE#TRPBF regulates float voltage at 4.00 V with ±1% accuracy (3.96 V to 4.04 V) over –40°C to 85°C. This value is intentionally lower than the standard 4.2 V to decelerate Li-ion aging during long-term standby-reducing capacity loss by up to 50% after 2 years compared to conventional charging. The LTC4064EMSE#TRPBF achieves this via a precision internal resistor divider referenced to a 2.485 V bandgap.
Can the LTC4064EMSE#TRPBF be used with USB 5 V power, and what are the current limitations?
Yes, the LTC4064EMSE#TRPBF accepts 4.25 V to 6.5 V input, making it fully compatible with standard USB 5 V ports. Its maximum charge current is limited by power dissipation and thermal regulation: with RPROG = 3 kΩ, it delivers 500 mA at room temperature, but current folds back above ~105°C junction temperature. The LTC4064EMSE#TRPBF draws only 1–2 mA supply current during charging, minimizing USB port loading.
How does the NTC temperature monitoring work on the LTC4064EMSE#TRPBF, and what thermistor values are supported?
The LTC4064EMSE#TRPBF uses the NTC pin to monitor battery temperature via a voltage divider formed by a 10 kΩ NTC thermistor to ground and a 1% RHOT resistor (e.g., 4.1 kΩ at 50°C) to VCC. It triggers hold mode when NTC voltage falls below 0.5×VCC (hot) or rises above 0.875×VCC (cold), with ~2°C hysteresis. The LTC4064EMSE#TRPBF supports any NTC with RCOLD/RHOT ≈ 7.0, including Vishay NTHS0603N02N1002J.
What happens when the LTC4064EMSE#TRPBF detects a defective battery, and how is the fault cleared?
If VBAT remains below 2.48 V for one-quarter of the programmed timer period, the LTC4064EMSE#TRPBF asserts FAULT low and halts charging-indicating possible cell failure. The fault is cleared by toggling VCC (power cycle), momentarily grounding SHDN, or pulling BAT above 2.48 V. The LTC4064EMSE#TRPBF does not auto-recover from this condition without intervention to prevent unsafe charging of degraded cells.
Does the LTC4064EMSE#TRPBF require external components for basic operation, and what are the minimum required parts?
Yes-the LTC4064EMSE#TRPBF requires three external components for functional operation: (1) RPROG (e.g., 3 kΩ for 500 mA) from PROG to GND, (2) CTIMER (e.g., 0.1 µF for 3-hour timer) from TIMER to GND, and (3) NTC network (10 kΩ thermistor + 1% RHOT resistor) on NTC pin. Bypass capacitors (≥4.7 µF on VCC, ≥1 µF on BAT) are strongly recommended for stability. The LTC4064EMSE#TRPBF integrates all active circuitry-including the power MOSFET-eliminating sense resistors and blocking diodes.
LTC4064EMSE#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:
- Timer
- Fault Protection:
- -
- Charge Current - Max:
- 1A
- Battery Pack Voltage:
- 4V
- Voltage - Supply (Max):
- 6.5V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC4064EMSE#TRPBF FAQ
1.How can I place an order for LTC4064EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4064EMSE#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 LTC4064EMSE#TRPBF reliable?
The price and inventory of LTC4064EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4064EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4064EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4064EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4064EMSE#TRPBF?
LTC4064EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4064EMSE#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 LTC4064EMSE#TRPBF?
For technical support, including LTC4064EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4064EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC4064EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4064EMSE#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 LTC4064EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4064EMSE#TRPBF?
All LTC4064EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4064EMSE#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 LTC4064EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC4064EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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