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Analog Devices Inc. LTC4006EGN-2#PBF
- Part No.:
- LTC4006EGN-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC4006EGN-2#PBF.pdf
- Description:
- IC BATT CHG LI-ION 3CELL 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,688
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Product details
Overview
LTC4006EGN-2#PBF from Analog Devices (formerly Linear Technology) is a standalone synchronous buck-mode Li-ion battery charger controller for 3-cell (12.6V) packs, delivering up to 4A programmable charge current with ±4% accuracy, ±0.8% float voltage accuracy (12.6V), and 96% peak efficiency. It integrates input current limiting, thermistor-based temperature qualification, automatic deep-discharge conditioning, and C/10 termination with restart logic - deployed in portable instruments and battery-backup systems.
For engineers reviewing the LTC4006EGN-2#PBF datasheet, LTC4006EGN-2#PBF pinout, LTC4006EGN-2#PBF application, or LTC4006EGN-2#PBF equivalent, key selection criteria include its 16-pin SSOP package, 6–28V wide input range, 12.6V fixed float voltage, integrated INFET gate driver, and thermistor-sensing capability for safe charging in industrial and portable equipment.
Technical Context
The LTC4006EGN-2#PBF implements a constant-off-time, current-mode synchronous buck architecture with dual MOSFET gate drivers (TGATE/BGATE) and an external P-channel input FET driver (INFET). Its inner-loop control uses ITH voltage to regulate peak inductor current via CSP–BAT sense resistor feedback, while EA error amplifier maintains 12.6V float voltage with 1.19V internal reference and precision resistor divider.
Thermistor monitoring operates via sampled NTC input with programmable high/low thresholds referenced to 4.5V, and charge timing is set by RT pin resistor (tTIMER = 1 hour × RRT/154kΩ). The device supports automatic restart when cell voltage falls below 3.9V/cell and includes overvoltage shutdown (>107% of programmed voltage) and reverse-current protection (<–25mV DCIN–CLN).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage | Fixed 12.6V ±0.8% for 3-cell Li-ion - ensures precise cell balancing without external DAC or trimming. |
| Max Charge Current | Programmable up to 4A via CSP–BAT sense resistor - enables scalable power delivery with ±4% accuracy excluding RSENSE tolerance. |
| Input Voltage Range | 6V to 28V - supports universal AC adapters and wide-range DC sources without external regulators. |
| Efficiency | Up to 96% - minimizes thermal load in enclosed portable enclosures and extends adapter runtime. |
| Operating Temp | –40°C to +85°C ambient - qualified for industrial and automotive-adjacent environments with no derating. |
| Switching Frequency | 255–345 kHz - avoids audible noise with ceramic output capacitors and simplifies EMI filtering. |
| Duty Cycle Max | 98% - sustains regulation down to VOUT/VIN ≈ 0.02, enabling operation near dropout with minimal voltage headroom. |
Pinout & Package
Package: 16-lead narrow-body SSOP (GN), 0.150" width, RoHS-compliant lead-free finish (#PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DCIN (1) | Input power supply rail | Accepts 6–28V; powers CLN and internal circuitry; requires ≥0.01µF bypass. |
| CHG (2) | Open-drain charge status indicator | Pulled low during active charge; 25µA sink at C/10; high-Z on timeout - enables 3-state microcontroller interface. |
| ACP/SHDN (3) | AC present / shutdown control | Open-drain output indicating adapter presence; also accepts <1V logic low to inhibit charging. |
| RT (4) | Timer resistor connection | Sets total charge time (tTIMER = 1 hr × RRT/154kΩ); absence prevents startup. |
| GND (5) | Analog/digital ground reference | Low-noise return for sensing and control loops; separate from PGND. |
| NTC (6) | Thermistor network input | Sampled to detect unsafe battery temperature; suspend/resume charging automatically. |
| ITH (7) | Inner-loop current control voltage | 0–3V analog control of peak inductor current; used for loop compensation and current limiting. |
| IMON (8) | Current monitor output | Linear 0.309V–1.19V output proportional to charge current - enables real-time telemetry without extra op-amps. |
| CSP (9) | Current sense positive input | Connects to high-side of RSENSE; forms differential pair with BAT for accurate current measurement. |
| BAT (10) | Battery sense and current sense negative | Reference for RSENSE; internally divided to set 12.6V float voltage; disconnected in shutdown. |
| CLP (11) | Current limit amplifier positive input | 100mV above CLN sets input current limit threshold - protects adapter under overload. |
| CLN (12) | Current limit reference and IC supply | Power rail for internal circuitry; requires 10–22µF local bypass; sets CLP threshold reference. |
| TGATE (13) | Top P-channel MOSFET gate driver | Drives external high-side PFET in buck stage; 50mV low-level drive ensures strong turn-on. |
| PGND (14) | High-current power ground | Return path for BGATE driver and inductor current - must be routed separately from signal GND. |
| BGATE (15) | Bottom N-channel MOSFET gate driver | Drives external low-side NFET; 4.5–10V swing ensures full enhancement and fast switching. |
| INFET (16) | Input P-channel FET gate driver | Controls external PFET for reverse-current blocking and AC-present detection - eliminates need for discrete OR-ing diode. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated INFET driver | Enables reverse-current blocking and AC-present indication using single external PFET - reduces BOM count and PCB area vs discrete solutions. |
| Automatic deep-discharge conditioning | Trickle-charges cells below 2.5V/cell at 10% of programmed current - recovers deeply depleted batteries without manual intervention. |
| Thermistor-based safety monitoring | Periodically samples NTC network to suspend/resume charging based on user-defined temperature thresholds - meets IEC 62133 thermal safety requirements. |
| C/10 termination with restart logic | Terminates charge at 10% of programmed current and auto-restarts if cell voltage drops below 3.9V/cell - prevents over-discharge in standby applications. |
| Wide-input synchronous buck controller | Operates from 6–28V input with 96% efficiency and 98% max duty cycle - supports high-voltage adapters while maintaining regulation into dropout. |
Applications
| Portable Medical Instruments | Notebook Computers |
|---|---|
Use Scenario: Rechargeable Li-ion powered handheld ultrasound or glucose meters requiring reliable, temperature-qualified charging in field-deployed units. IC Role / Device Role / Timing Role: Standalone 3-cell charger controller managing constant-current/constant-voltage profile, thermistor-based thermal cutoff, and C/10 termination. Use Value: Eliminates need for host MCU involvement in charging state machine - reduces firmware complexity and improves safety certification path. | Use Scenario: Embedded battery charging subsystem in thin-and-light notebooks where space, thermal performance, and adapter flexibility are critical. IC Role / Device Role / Timing Role: Primary buck-mode charger IC regulating 12.6V float voltage, limiting input current to match OEM adapter specs, and driving external power FETs. Use Value: 96% efficiency and 255–345kHz switching minimize heatsink size and audible noise - essential for fanless notebook designs. |
| Battery-Backup Systems | Standalone Li-ion Chargers |
Use Scenario: Uninterruptible power supplies (UPS) and telecom backup units needing autonomous charging with deep-discharge recovery and input current limiting. IC Role / Device Role / Timing Role: Core charger controller executing full CC/CV cycle, timer-based termination, and automatic restart after brownout events. Use Value: Built-in 25% timer reset on C/10 detection extends battery life by preventing premature termination during high-impedance aging. | Use Scenario: Industrial dock chargers or test equipment jigs requiring plug-and-play charging of 3-cell Li-ion packs without host system integration. IC Role / Device Role / Timing Role: Self-contained charger IC with open-drain CHG/ACP indicators, IMON current telemetry, and RT-programmable charge duration. Use Value: Simplified bring-up with no firmware dependency - enables rapid validation and production line deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion battery charger controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4006EGN-4#PBF | Fixed 16.8V float voltage for 4-cell packs; identical pinout, timing, and feature set. | Targets 4-cell (14.4V nominal) battery systems instead of 3-cell (12.6V nominal) configurations. | Select when battery pack voltage is 14.4V nominal and float requirement is 16.8V - no layout change required. |
| LTC4006EGN-6#PBF | Fixed 8.4V float voltage for 2-cell packs; same SSOP-16 package and functional architecture. | Designed for compact 2-cell (7.4V nominal) devices such as wearables or Bluetooth speakers. | Choose for space-constrained 2-cell applications where 8.4V float and lower current capability align with system needs. |
Compared with LTC4006EGN-4#PBF and LTC4006EGN-6#PBF, the LTC4006EGN-2#PBF provides optimal voltage matching for standard 3-cell Li-ion packs (12.6V), avoiding external voltage scaling or regulator overhead while retaining identical thermal, timing, and safety features across the family.
Availability
LTC4006EGN-2#PBF is available at Aetrix Electronics and suitable for portable medical instruments, notebook computers, and battery-backup systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LTC4006EGN-2#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC4006 product line delivers highly integrated, standalone Li-ion battery charger controllers optimized for portable and industrial applications demanding precision voltage/current regulation, thermal safety, and minimal external component count.
FAQ
What is the fixed float voltage of the LTC4006EGN-2#PBF?
The LTC4006EGN-2#PBF has a factory-programmed float voltage of 12.6V ±0.8% for 3-cell Li-ion battery packs. This value is trimmed during production and cannot be adjusted externally - it is distinct from the LTC4006EGN-4#PBF (16.8V) and LTC4006EGN-6#PBF (8.4V) variants. The 12.6V setting ensures compliance with standard 3S Li-ion chemistry requirements without external feedback resistors.
Does the LTC4006EGN-2#PBF require external MOSFETs?
Yes, the LTC4006EGN-2#PBF is a controller IC and requires external power MOSFETs: one P-channel FET driven by TGATE for the high-side switch, one N-channel FET driven by BGATE for the low-side switch, and a third P-channel FET driven by INFET for input reverse-current protection. The datasheet provides recommended part numbers (e.g., Si4925DY) and layout guidelines for optimal thermal and switching performance of the LTC4006EGN-2#PBF.
How does the thermistor interface work on the LTC4006EGN-2#PBF?
The LTC4006EGN-2#PBF samples the NTC thermistor via the NTC pin using an internal sample-and-hold circuit synchronized to the RT timer. It compares the sampled voltage against high/low thresholds derived from a 4.5V reference (±0.5% typical), suspending charging if outside limits and resuming automatically when within range. No external ADC or MCU polling is needed - the LTC4006EGN-2#PBF handles full thermal qualification autonomously.
Can the LTC4006EGN-2#PBF operate with input voltage below 6V?
No - the LTC4006EGN-2#PBF has a minimum DCIN operating voltage of 6V per Absolute Maximum Ratings and Electrical Characteristics tables. Below this, UVLO prevents startup. If the input drops below 4.2V (rising threshold), the device shuts down. Operation at 5.5V or lower is not supported, and attempting to bias DCIN below 6V may result in undefined behavior or failure to initiate charging - always verify adapter compliance before deploying the LTC4006EGN-2#PBF.
What is the purpose of the IMON pin on the LTC4006EGN-2#PBF?
IMON provides a buffered, linear voltage output (0.309V at 0A, 1.19V at full-scale current) proportional to instantaneous charge current, enabling real-time current monitoring without additional amplification. It is directly tied to the CSP–BAT sense amplifier output and must be filtered with a capacitor to ground. Loading IMON with <100kΩ impedance degrades LTC4006EGN-2#PBF current accuracy - use high-impedance ADC inputs or op-amp buffers for reliable telemetry.
LTC4006EGN-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 3
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- -
- Charge Current - Max:
- -
- Battery Pack Voltage:
- 12.6V
- Voltage - Supply (Max):
- 28V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LTC4006EGN-2#PBF FAQ
1.How can I place an order for LTC4006EGN-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4006EGN-2#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 LTC4006EGN-2#PBF reliable?
The price and inventory of LTC4006EGN-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4006EGN-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC4006EGN-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4006EGN-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4006EGN-2#PBF?
LTC4006EGN-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4006EGN-2#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 LTC4006EGN-2#PBF?
For technical support, including LTC4006EGN-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4006EGN-2#PBF requirements.
6.How does Aetrix verify that LTC4006EGN-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4006EGN-2#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 LTC4006EGN-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC4006EGN-2#PBF?
All LTC4006EGN-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4006EGN-2#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 LTC4006EGN-2#PBF part is unused and in its original packaging.
Return procedure for LTC4006EGN-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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