My Inquiry
My Account
Analog Devices Inc. LTC4071IDDB#TRPBF
- Part No.:
- LTC4071IDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4071IDDB#TRPBF.pdf
- Description:
- IC BATT CHG LI-ION 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,263
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC4071IDDB#TRPBF from Analog Devices is a Li-ion/polymer shunt battery charger IC with integrated low-battery disconnect, thermal qualification via NTC, and programmable 4.0V/4.1V/4.2V float voltage. It operates from 550nA quiescent current, supports up to 50mA internal shunt current, and delivers near-zero leakage (<0.1nA) battery disconnect at 2.7V or 3.2V thresholds-enabling energy harvesting, thin-film battery backup, and solar-powered memory retention systems.
For engineers reviewing the LTC4071IDDB#TRPBF datasheet, LTC4071IDDB#TRPBF pinout, LTC4071IDDB#TRPBF application, or LTC4071IDDB#TRPBF equivalent, key selection criteria include its ultra-low ICCQ (550nA), ±1% VFLOAT accuracy over temperature, pin-selectable LBSEL thresholds, NTC-based thermal float voltage reduction, and DFN-8 (2mm × 3mm, 0.75mm height) package with exposed thermal pad.
Technical Context
The LTC4071IDDB#TRPBF implements a shunt-based charging architecture requiring only one external resistor (RIN) to set charge/shunt current. Its internal PFET (MP1) enables automatic battery reconnection when VCC rises above VLBC_VCC (3.6V or 4.19V), while HBO provides CMOS-compatible high-battery status with 40mV threshold and 100mV hysteresis.
NTC qualification uses pulsed 30–200µs NTCBIAS biasing at ~0.003% duty cycle to compare NTC voltage against four internal reference taps (NTCTH1–NTCTH4), enabling stepwise ∆VFLOAT(NTC) reduction of 50/75/100mV per 10°C above 40°C depending on ADJ state-ensuring battery safety without continuous power draw.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Current (ICCQ) | 550nA typical - enables multi-year operation from microampere-scale energy harvesters |
| Float Voltage Accuracy | ±1% over –40°C to 125°C - ensures reliable Li-ion cell voltage regulation across industrial environments |
| Max Shunt Current | 50mA - limits RIN power dissipation and sets maximum charge rate in single-resistor configurations |
| Low Battery Disconnect Leakage | <0.1nA - prevents deep discharge damage even in sub-µAh batteries over extended storage |
| NTC Float Adjustment Steps | 50mV/75mV/100mV per 10°C above 40°C - configurable via ADJ pin to match Vishay B25/85=3490 thermistor profiles |
| HBO Threshold Hysteresis | 100mV - prevents chatter during battery voltage transitions near full charge |
| Package Thermal Resistance (θJA) | 76°C/W - requires PCB thermal pad connection for safe 50mA shunt operation at elevated ambient |
Pinout & Package
Package: 8-lead plastic DFN (2mm × 3mm, 0.75mm height) with exposed thermal pad (Pin 9), rated for –40°C to 125°C junction temperature. Exposed pad must be soldered to PCB ground for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NTCBIAS (1) | NTC bias reference source | Pulsed low-duty-cycle (~0.003%) VCC output for thermistor ratio measurement; minimizes self-heating and power loss |
| NTC (2) | Thermistor voltage input | Compares against internal divider taps (NTCTH1–NTCTH4) to trigger ∆VFLOAT(NTC) steps at 40/50/60/70°C |
| ADJ (3) | Float voltage programming input | GND = 4.0V, floating = 4.1V, VCC = 4.2V; sampled every 1.2s (HBO high) or 3.6s (HBO low) |
| HBO (4) | High battery status output | CMOS output active-high when VCC ≥ VFLOAT_EFF – 40mV; sinks 1mA low, sources 0.5mA high |
| LBSEL (5) | Low battery disconnect level select | GND = 3.2V disconnect, VCC = 2.7V disconnect; determines trade-off between runtime and shelf life |
| GND (6, 9) | Power and signal reference | Pin 6 = signal GND; Pin 9 = exposed thermal pad - electrically isolated but must connect to PCB GND for θJA = 76°C/W |
| BAT (7) | Battery terminal | Sources VCC when no input supply present; disconnects from VCC below VLBD to prevent over-discharge |
| VCC (8) | System load supply node | Regulated output (4.0/4.1/4.2V); sinks up to 50mA; decoupling capacitor ≥0.1µF required |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor shunt charging | Eliminates need for external MOSFET, sense resistors, or control logic - reduces BOM count and layout area |
| Ultralow-power NTC qualification | 30–200µs pulses at ~1.2s intervals reduce average NTCBIAS current to 30–50pA - preserves battery capacity |
| Programmable low-battery disconnect | 2.7V or 3.2V thresholds selected by LBSEL pin - allows runtime vs. shelf-life optimization without firmware |
| Thermally enhanced DFN package | 0.75mm profile with exposed pad achieves 76°C/W θJA - supports 50mA shunt current in space-constrained designs |
| High-battery status with hysteresis | HBO asserts within 40mV of VFLOAT_EFF and releases only after 140mV drop - prevents false triggers during load transients |
Applications
| Energy Harvesting Systems | Solar-Powered Memory Backup |
|---|---|
|
Use Scenario: Charging ultra-low-capacity thin-film Li-ion batteries from intermittent microwatt-level RF or thermal harvesters. IC Role / Device Role / Timing Role: Shunt charger + battery protector - regulates float voltage, disconnects battery at 2.7V, and draws only 550nA when idle. Use Value: Enables >5-year maintenance-free operation using <1µA average input current, eliminating need for primary cells or supercaps. |
Use Scenario: Maintaining SRAM or real-time clock data during AC mains failure in smart meters or IoT gateways powered by small solar panels. IC Role / Device Role / Timing Role: Dual-function backup manager - charges Li-ion cell to 4.1V, disconnects at 3.2V to preserve shelf life, and signals full charge via HBO. Use Value: Guarantees >10-year data retention with zero firmware intervention and no risk of overcharge or deep discharge. |
| Embedded Automotive Sensors | Low-Power Industrial Telemetry |
|
Use Scenario: Powering tire pressure monitoring systems (TPMS) or cabin sensors using miniature Li-poly cells charged via vehicle vibration energy harvesters. IC Role / Device Role / Timing Role: Temperature-aware battery manager - reduces float voltage by 100mV/10°C above 40°C to extend cell lifetime in under-hood environments. Use Value: Prevents thermal runaway and extends battery service life by 3× compared to fixed-voltage chargers in 85°C ambient. |
Use Scenario: Remote environmental monitors deployed in unpowered field locations, recharged seasonally via mini-solar arrays. IC Role / Device Role / Timing Role: Intermittent-source regulator - accepts discontinuous input, maintains VCC regulation, and disconnects battery before irreversible Li-ion degradation occurs. Use Value: Eliminates manual battery replacement across 100+ sensor nodes; supports 15-year deployments with <0.5% annual capacity loss. |
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; 35µA quiescent current | Requires external thermistor circuit for thermal protection; unsuitable for sub-µA energy harvesting inputs | Select MAX1555 only for higher-current wall-adapter applications where NTC safety is handled externally |
| BQ29700 | Li-ion protector IC only (no charging function); 1.5µA IQ; 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 an existing charger design with independent VFLOAT control |
Compared with MAX1555 and BQ29700, the LTC4071IDDB#TRPBF uniquely integrates shunt charging, NTC-based thermal float adjustment, and ultralow 550nA quiescent current in a single DFN-8 package-making it the only solution capable of direct energy harvesting integration without auxiliary components.
Availability
LTC4071IDDB#TRPBF is available at Aetrix Electronics and suitable for energy harvesting systems, solar-powered memory backup, embedded automotive sensors, low-power industrial telemetry, and thin-film battery applications requiring stable component supply and long-term lifecycle support.
Supply support for LTC4071IDDB#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power management and sensing solutions.
The LTC4071IDDB#TRPBF belongs to Analog Devices' Linear Technology battery management product line, designed specifically for ultra-low-power, single-component Li-ion charging and protection in energy-constrained systems such as IoT edge nodes and wearable electronics.
FAQ
What is the minimum input current required to operate the LTC4071IDDB#TRPBF?
The LTC4071IDDB#TRPBF operates with input currents as low as 550nA - its quiescent current - making it compatible with micropower energy harvesters. When charging, it can regulate battery voltage using input currents from 550nA up to 50mA, determined by the external RIN resistor value and input voltage headroom.
How does the LTC4071IDDB#TRPBF implement thermal protection without continuous power draw?
The LTC4071IDDB#TRPBF uses pulsed NTCBIAS biasing (30–200µs duration, ~0.003% duty cycle) to sample the NTC thermistor voltage intermittently. This reduces average NTCBIAS current to just 30–50pA while still enabling precise temperature-triggered float voltage reduction steps at 40°C, 50°C, 60°C, and 70°C.
Can the LTC4071IDDB#TRPBF be used with batteries other than Li-ion or Li-polymer?
No - the LTC4071IDDB#TRPBF is specifically designed for single-cell Li-ion and Li-polymer batteries. Its float voltage range (4.0V–4.2V), low-battery disconnect thresholds (2.7V/3.2V), and NTC qualification algorithm are calibrated for Li-based chemistries. Using it with NiMH, lead-acid, or LiFePO₄ would result in improper charging or protection.
What is the role of the exposed thermal pad (Pin 9) on the LTC4071IDDB#TRPBF DFN package?
The exposed thermal pad (Pin 9) on the LTC4071IDDB#TRPBF has no internal electrical connection but must be soldered to a PCB ground plane to achieve the specified θJA of 76°C/W. Without this connection, thermal resistance increases significantly, risking junction temperature exceedance during 50mA shunt operation.
How does the LBSEL pin affect system behavior beyond battery disconnect voltage?
The LBSEL pin directly sets both the low-battery disconnect (VLBD) and reconnect (VLBC_BAT/VLBC_VCC) thresholds. When LBSEL = GND (3.2V mode), VLBC_VCC = 4.19V; when LBSEL = VCC (2.7V mode), VLBC_VCC = 3.6V. This means the system load may experience longer brown-out periods before battery reconnection in 2.7V mode, impacting recovery time after input dropout.
LTC4071IDDB#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-DFN (3x2)
LTC4071IDDB#TRPBF FAQ
1.How can I place an order for LTC4071IDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4071IDDB#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 LTC4071IDDB#TRPBF reliable?
The price and inventory of LTC4071IDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4071IDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4071IDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4071IDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4071IDDB#TRPBF?
LTC4071IDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4071IDDB#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 LTC4071IDDB#TRPBF?
For technical support, including LTC4071IDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4071IDDB#TRPBF requirements.
6.How does Aetrix verify that LTC4071IDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4071IDDB#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 LTC4071IDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4071IDDB#TRPBF?
All LTC4071IDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4071IDDB#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 LTC4071IDDB#TRPBF part is unused and in its original packaging.
Return procedure for LTC4071IDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC4071IDDB#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…
