My Inquiry
My Account
Analog Devices Inc. LTC4071IMS8E#PBF
- Part No.:
- LTC4071IMS8E#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC4071IMS8E#PBF.pdf
- Description:
- IC BATT CHG LI-ION 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:132
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC4071IMS8E#PBF from Analog Devices is a Li-ion/polymer shunt battery charger IC with integrated low-battery disconnect, thermal battery qualification via NTC, and pin-selectable float voltage (4.0V/4.1V/4.2V) and disconnect thresholds (2.7V/3.2V). It operates from 550nA quiescent current, supports ≤50mA internal shunt current, and delivers near-zero leakage (<0.01nA) during battery disconnect - enabling energy harvesting, thin-film battery backup, and solar-powered memory retention.
For engineers reviewing the LTC4071IMS8E#PBF datasheet, LTC4071IMS8E#PBF pinout, LTC4071IMS8E#PBF application, or LTC4071IMS8E#PBF equivalent, key selection criteria include its ultra-low ICCQ, programmable thermal float voltage adjustment (ΔVFLOAT(NTC) = 50/75/100mV per 10°C), CMOS HBO status output, and MSOP-8 package compatibility with high-density PCB layouts in space-constrained embedded systems.
Technical Context
The LTC4071IMS8E#PBF implements a shunt-based charging architecture where input current flows through an external resistor (RIN) into the battery via MP1's body diode until VCC reaches VLBC_VCC, then reconnects BAT to VCC via an internal PFET. Its 3-state ADJ pin decoder sets float voltage with ±1% accuracy over temperature, while pulsed NTCBIAS sampling (duty cycle < 0.002%) enables ultralow-power thermal qualification.
Low-battery protection uses dual hysteresis: VLBD (2.7V or 3.2V falling) triggers disconnect with <0.01nA leakage, and VLBC_BAT/VLBC_VCC (2.97V/3.53V or 3.6V/4.19V rising) re-enables connection. The HBO output asserts high when VCC rises within 15–75mV of VFLOAT_EFF and deasserts with 100mV hysteresis, reducing ICCQ to 550nA in low-power mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Float Voltage Options | 4.0V (ADJ = GND), 4.1V (ADJ = floating), 4.2V (ADJ = VCC); ±1% accuracy over –40°C to 125°C |
| Max Shunt Current | 50mA; limits charge rate and regulates VCC without external FET or control loop |
| Quiescent Current (ICCQ) | 550nA typical; enables multi-year operation on microampere-scale energy harvesters |
| Low-Battery Disconnect Leakage | <0.01nA at 2.65V; prevents irreversible deep discharge of sub-10mAh Li-ion or thin-film batteries |
| NTC Float Adjustment | ΔVFLOAT(NTC) = 50mV/75mV/100mV per 10°C above 40°C; extends battery lifetime by reducing stress at elevated temperatures |
| HBO Output Threshold | VHBTH = 15–75mV above VFLOAT_EFF; provides precise full-charge indication with 100mV hysteresis for noise immunity |
| Package Thermal Resistance | θJA = 40°C/W (MSOP-8); enables 50mA shunt operation with ≤8°C junction rise at TA = 85°C |
Pinout & Package
Package: 8-lead plastic MSOP (3mm × 3mm, 0.75mm height), thermally enhanced with exposed pad (Pin 9) requiring soldering to PCB ground for optimal θJA = 40°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NTCBIAS (Pin 1) | NTC bias reference | Pulsed 30–50pA sink; enables ultralow-power thermistor excitation without continuous current drain |
| NTC (Pin 2) | Thermistor input | Compares against internal divider taps (NTCTH1–NTCTH4) to trigger ΔVFLOAT(NTC) steps at 40/50/60/70°C |
| ADJ (Pin 3) | Float voltage select | 3-state logic: GND = 4.0V, floating = 4.1V, VCC = 4.2V; sampled every 1.2–3.6s to prevent leakage corruption |
| HBO (Pin 4) | High-battery status output | CMOS push-pull output; active-high when VCC ≥ VFLOAT_EFF – VHBTH; sinks 1mA / sources 0.5mA |
| LBSEL (Pin 5) | Low-battery threshold select | GND = 3.2V disconnect, VCC = 2.7V disconnect; must be hard-wired, not floated |
| GND (Pin 6 + Exposed Pad 9) | Power and signal ground | Exposed pad is electrically isolated but thermally critical; must be soldered to PCB ground plane |
| BAT (Pin 7) | Battery terminal | Sources VCC load current when no input supply present; disconnects at VLBD to protect battery |
| VCC (Pin 8) | System power rail | Regulated output (4.0/4.1/4.2V); sinks up to 50mA; requires ≥0.1µF decoupling capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor shunt charging | Eliminates need for external MOSFET, op-amps, or feedback networks - reduces BOM count and layout area |
| Ultralow 550nA operating current | Enables direct integration with micropower energy harvesters (e.g., solar cells, piezoelectric transducers) |
| Programmable thermal float voltage | Automatically lowers VFLOAT by fixed 50/75/100mV steps above 40°C using standard Vishay NTHS0402N02N1002F thermistor |
| Two-level low-battery disconnect | 2.7V (max runtime) or 3.2V (extended shelf life) cutoff with 0.01nA leakage - preserves capacity in long-term storage |
| CMOS HBO status output | Provides system-level charge-state monitoring without additional level-shifting or conditioning circuitry |
Applications
| Energy Harvesting Systems | Solar-Powered Memory Backup |
|---|---|
|
Use Scenario: Indoor light-harvesting node powers real-time clock and SRAM using a 1.2V amorphous silicon cell and 5mAh thin-film Li-ion battery. IC Role / Device Role / Timing Role: LTC4071IMS8E#PBF acts as shunt regulator and battery protector, managing intermittent µW-level input while preventing over-discharge during dark periods. Use Value: 550nA ICCQ ensures >5 years of maintenance-free operation; 0.01nA disconnect leakage avoids capacity loss during 6-month storage. |
Use Scenario: Off-grid weather station uses small solar panel to maintain backup power for microcontroller EEPROM and RTC during multi-day cloud cover. IC Role / Device Role / Timing Role: LTC4071IMS8E#PBF regulates VCC to 4.1V, disconnects battery at 3.2V to preserve charge, and signals full charge via HBO to enable sleep-mode optimization. Use Value: Pin-selectable 3.2V disconnect extends battery shelf life by 40% vs 2.7V; NTC qualification prevents thermal degradation in desert deployments. |
| Embedded Automotive Telematics | Industrial Sensor Node Backup |
|
Use Scenario: CAN bus telematics module retains GPS position and last-ride data during vehicle ignition-off periods using supercapacitor-assisted Li-ion backup. IC Role / Device Role / Timing Role: LTC4071IMS8E#PBF charges backup battery from 12V rail via RIN, disconnects at 2.7V to maximize runtime, and asserts HBO to wake MCU on charge completion. Use Value: 50mA shunt capability handles peak 30mA charging currents; MSOP-8 footprint fits tight automotive PCB constraints. |
Use Scenario: Wireless vibration sensor in factory machinery uses ambient RF energy to trickle-charge 2.5mAh Li-polymer battery for periodic BLE transmission. IC Role / Device Role / Timing Role: LTC4071IMS8E#PBF serves as ultra-low-power charger and protector, interfacing with RF-to-DC converter and isolating battery during deep-sleep cycles. Use Value: Near-zero disconnect leakage (<0.01nA) prevents self-discharge below 1% per year; 4.0V float setting optimizes battery longevity in 24/7 operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1555 | Linear charger with 100mA max current; no NTC qualification; fixed 4.2V float; 25µA quiescent current | Requires external thermal management; unsuitable for energy harvesting due to 45× higher ICCQ | Select MAX1555 only for high-current, non-thermal-critical applications with stable wall adapters |
| BQ29700 | Li-ion protector IC only (no charging function); 1.5µA ICCQ; fixed 2.5V/3.0V disconnect; no float voltage regulation | Must pair with separate charger; lacks integrated shunt regulation and HBO status output | Choose BQ29700 only when adding standalone protection to existing charger designs |
Compared with MAX1555 and BQ29700, the LTC4071IMS8E#PBF uniquely combines shunt charging, thermal float adjustment, and sub-nanoampere disconnect leakage in a single MSOP-8 package - making it the only viable option for ultra-low-power, thermally aware, single-component battery management in energy-constrained systems.
Availability
LTC4071IMS8E#PBF is available at Aetrix Electronics and suitable for energy harvesting systems, solar-powered memory backup, and embedded automotive telematics requiring stable component supply across extended temperature ranges (–40°C to 125°C).
Supply support for LTC4071IMS8E#PBF 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 (now part of Analog Devices, Inc., a wholly owned subsidiary of Analog Devices, Inc.) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC4071IMS8E#PBF belongs to Analog Devices' precision battery management IC product line, designed specifically for ultra-low-power, thermally robust charging and protection of Li-ion/polymer cells in energy-constrained and harsh-environment applications.
FAQ
What is the maximum shunt current capability of the LTC4071IMS8E#PBF?
The LTC4071IMS8E#PBF supports up to 50mA of internal shunt current. This value is specified under conditions where VCC exceeds the programmed float voltage and represents the maximum current the device can divert away from the battery to maintain regulation. It is independent of external resistor value but determines the upper bound of charge current in RIN-limited configurations. Exceeding this limit risks thermal overload or regulation failure.
How does the NTC qualification affect the float voltage in the LTC4071IMS8E#PBF?
The LTC4071IMS8E#PBF reduces the effective float voltage (VFLOAT_EFF) in discrete 50mV, 75mV, or 100mV steps per 10°C rise above 40°C, depending on the ADJ pin state (GND/floating/VCC). For example, with ADJ = VCC and battery temperature rising from 40°C to 65°C, VFLOAT_EFF drops from 4.200V to 4.000V. This behavior is calibrated for Vishay NTHS0402N02N1002F thermistors and directly extends battery cycle life under thermal stress.
Can the LTC4071IMS8E#PBF be used with batteries other than Li-ion or Li-polymer?
No - the LTC4071IMS8E#PBF is specifically designed and characterized for single-cell Li-ion and Li-polymer batteries. Its float voltage range (4.0–4.2V), low-battery thresholds (2.7V/3.2V), and NTC qualification algorithm assume the voltage-temperature profile of these chemistries. Using it with NiMH, LiFePO₄, or lead-acid batteries would result in incorrect charging, premature disconnect, or thermal mismanagement.
What is the purpose of the HBO pin on the LTC4071IMS8E#PBF?
The HBO (High Battery Output) pin on the LTC4071IMS8E#PBF is a CMOS-compatible status indicator that goes high when VCC rises to within 15–75mV of the effective float voltage (VFLOAT_EFF), signaling near-full charge. It asserts with 100mV hysteresis to reject noise and transitions low when VCC falls more than VHBTH + VHBHY below VFLOAT_EFF. This enables host systems to optimize power states or log charge events without polling.
Does the LTC4071IMS8E#PBF require external components beyond RIN?
Yes - while only one external resistor (RIN) is required for basic shunt charging, the LTC4071IMS8E#PBF needs a minimum 0.1µF decoupling capacitor on VCC, plus optional components for NTC sensing (10kΩ bias resistor + thermistor) and LBSEL/ADJ pull-up/down. For solar applications, a series diode may be added to prevent reverse current. No external FET, op-amp, or voltage reference is needed due to its fully integrated architecture.
LTC4071IMS8E#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- -
- Current - Charging:
- -
- Programmable Features:
- -
- Fault Protection:
- -
- Charge Current - Max:
- -
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- -
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
LTC4071IMS8E#PBF FAQ
1.How can I place an order for LTC4071IMS8E#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4071IMS8E#PBF 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 LTC4071IMS8E#PBF reliable?
The price and inventory of LTC4071IMS8E#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4071IMS8E#PBF is usually 5 days.
3.What payment methods are accepted for LTC4071IMS8E#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4071IMS8E#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4071IMS8E#PBF?
LTC4071IMS8E#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4071IMS8E#PBF 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 LTC4071IMS8E#PBF?
For technical support, including LTC4071IMS8E#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4071IMS8E#PBF requirements.
6.How does Aetrix verify that LTC4071IMS8E#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4071IMS8E#PBF 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 LTC4071IMS8E#PBF meets industry standards.
7.What is the process for return or replacement of LTC4071IMS8E#PBF?
All LTC4071IMS8E#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4071IMS8E#PBF, 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 LTC4071IMS8E#PBF part is unused and in its original packaging.
Return procedure for LTC4071IMS8E#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC4071IMS8E#PBF 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…
