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Analog Devices Inc. LTC4060EDHC#PBF
- Part No.:
- LTC4060EDHC#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC4060EDHC#PBF.pdf
- Description:
- IC BAT CHG MULT-CHEM 1-4CL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:114
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Product details
Overview
LTC4060EDHC#PBF from Analog Devices (formerly Linear Technology) is a standalone linear fast charger IC for 2-cell NiMH/NiCd batteries, featuring –∆V termination, programmable 2A fast charge current (±5% accuracy), automatic precharge, and thermistor-based temperature qualification. It operates from 4.5V to 10V input, requires no microcontroller or sense resistor, and drives an external PNP pass transistor for battery charging in portable medical devices and consumer docks.
For engineers reviewing the LTC4060EDHC#PBF datasheet, LTC4060EDHC#PBF pinout, LTC4060EDHC#PBF application, or LTC4060EDHC#PBF equivalent, this page delivers verified technical context, exact pin functions, real-world NiMH/NiCd charging profiles, thermal qualification thresholds, and validated alternative parts - all grounded in the official Linear Technology LTC4060 datasheet Rev. F.
Technical Context
The LTC4060EDHC#PBF implements a fully autonomous linear charging architecture with integrated state machine control: it sequences through sleep → shutdown → charge qualification → precharge (C/5) → fast charge → termination → autorecharge. Its core sensing relies on high-resolution A/D conversion of cell voltage (1.5mV LSB) and NTC thermistor voltage, with per-cell thresholds (e.g., VFCQ = 900mV, VMDV = 8mV for NiMH) enabling precise chemistry-specific termination.
Charge regulation uses a precision internal current-sense resistor (0.03Ω) and feedback-controlled DRIVE pin sink current (40–120mA typical) to bias an external PNP transistor; fast charge current is set via PROG pin (1.5V reference) and RPROG, delivering 2A at ±5% accuracy across temperature and supply voltage. Undervoltage lockout (UVLO) has three selectable thresholds (4.36V / 6.81V / 8.47V) determined by SEL0/SEL1 configuration for 1–4 cell stacks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fast Charge Current | 2A ±5% at 25°C; set by 698Ω PROG resistor; enables full-rate charging of 2-cell NiMH packs without external sense resistor. |
| Termination Method | –∆V detection (8mV for NiMH, 16mV for NiCd); backed by programmable timer and 1.95V/cell overvoltage cutoff. |
| Input Voltage Range | 4.5V to 10V; UVLO exit threshold configurable to 4.36V (2-cell), 6.81V (3-cell), or 8.47V (4-cell) via SEL0/SEL1 pins. |
| Battery Leakage in Sleep | <1µA; achieved by disconnecting internal bias networks when VCC = 0V, preserving battery shelf life in docked devices. |
| Precharge Threshold | 900mV/cell; initiates C/5 trickle charge for deeply discharged cells before transitioning to full-rate fast charge. |
| NTC Temperature Range | 5°C to 45°C qualification window; enforced via VCLD = 0.86V and VHTI = 0.5V thresholds referenced to VCC/3. |
| Package Thermal Resistance | θJA = 37°C/W (DFN-16); requires soldering exposed pad (Pin 17) to PCB ground plane for rated performance. |
Pinout & Package
Package: 16-lead (5mm × 3mm) DFN with 0.75mm height and exposed GND pad (Pin 17). Requires thermal anchoring to PCB for θJA = 37°C/W; unsoldered pad degrades thermal resistance to 140°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DRIVE (1) | PNP Base Drive Output | Sink driver (40–120mA) controlling external PNP transistor base; includes current-limit protection to prevent IC damage during saturation. |
| BAT (2) | Battery Voltage Sense Input | Monitors total pack voltage; internal divider disconnected in shutdown to eliminate leakage path to battery. |
| SENSE (3) | Current Sense Node | Connects to PNP emitter; carries full charge current through internal 0.03Ω resistor for accurate regulation without external sense element. |
| TIMER (4) | Charge Timer Capacitor Input | External capacitor (e.g., 1.5nF) sets max charge time; timing accuracy ±15% over temperature and supply range. |
| SHDN (5) | Active-Low Shutdown Input | Pulling low disables charging, resets timer, and reduces VCC supply current to 250–325µA; battery drain remains <1µA. |
| PAUSE (6) | Charge Pause Control | High level halts charge current, stops timer, and suspends termination logic; resumes automatically on low transition. |
| PROG (7) | Charge Current Programming | 1.5V virtual reference; 698Ω to GND programs 2A fast charge (930× IPROG); supports >2A with external sense resistor. |
| ARCT (8) | Autorecharge Threshold Input | Programs recharge trigger voltage (e.g., 1.1V = 1.1V/cell); default 1.3V when tied to VCC; disabled when grounded. |
| SEL0/SEL1 (9,10) | Cell Count Selection | Binary-coded inputs selecting 1–4 series cells; determines UVLO thresholds and voltage scaling for all per-cell comparators. |
| NTC (11) | Thermistor Interface Input | Accepts voltage divider from NTC; qualifies charging only if sensed voltage falls between 0.5V (hot init) and 0.86V (cold limit). |
| CHEM (12) | Chemistry Selection | High = NiCd (–∆V = 16mV), low = NiMH (–∆V = 8mV); selects termination algorithm and voltage thresholds. |
| ACP (13) | AC Present Status Output | Open-drain output pulled low when VCC exceeds UVLO threshold; drives LED directly with <0.8V drop at 10mA. |
| VCC (14) | Power Input | 4.5–10V supply; bypassed with 1µF capacitor; powers all internal circuits and provides reference for PROG/NTC/ARCT pins. |
| CHRG (15) | Charge Status Output | Open-drain indicator pulled low during precharge, fast charge, or pause; high-impedance when idle or terminated. |
| GND (16) | Ground Reference | Primary ground for internal references, comparators, and A/D converter; all voltage thresholds referenced to this node. |
| Exposed Pad (17) | Thermal & Electrical Ground | Internally connected to GND; must be soldered to PCB ground plane to achieve specified θJA = 37°C/W and power handling. |
Key Features
| Feature | Design Value |
|---|---|
| No firmware or microcontroller required | Fully autonomous state machine handles precharge, fast charge, –∆V detection, timer backup, and autorecharge without software intervention. |
| Accurate 2A fast charge current | ±5% tolerance at 2A across temperature and supply voltage, enabled by precision 0.03Ω internal sense resistor and 1.5V PROG reference. |
| Three-level UVLO with hysteresis | Configurable entry/exit thresholds (4.36V/6.81V/8.47V) for 1–4 cell stacks, each with 100mV hysteresis to prevent oscillation near dropout. |
| Per-cell voltage monitoring | All critical thresholds (VFCQ, VMDV, VBOV, VBR) defined per cell; eliminates scaling errors when charging multi-cell NiMH/NiCd packs. |
| Negligible battery drain in sleep mode | <1µA leakage when VCC removed, achieved by disconnecting BAT pin divider and disabling all bias currents - critical for long-term dock storage. |
| Thermistor qualification with dual limits | Enforces 5°C–45°C safe charging window using independent hot-init (0.5V) and cold-limit (0.86V) thresholds referenced to VCC/3. |
Applications
| Portable Medical Devices | Charging Docks & Cradles |
|---|---|
|
Use Scenario: Recharging sealed NiMH battery packs in handheld ultrasound probes and glucose meters that remain docked for extended periods. IC Role / Device Role / Timing Role: Standalone charger IC managing full charge cycle including precharge, –∆V termination, and automatic top-off without host processor involvement. Use Value: Eliminates need for system MCU to manage charging logic, reduces BOM count, and ensures safe multi-cell NiMH charging with thermal qualification. |
Use Scenario: Integrated charging in desktop cradles for two-way radios and barcode scanners requiring reliable overnight top-off. IC Role / Device Role / Timing Role: Linear charger controller driving external PNP transistor to deliver regulated 2A into 2-cell NiMH packs while monitoring AC presence and battery status. Use Value: Enables compact, low-noise charging with CHRG and ACP open-drain outputs driving status LEDs directly - no additional drivers needed. |
| Consumer Portable Electronics | Industrial Handheld Terminals |
|
Use Scenario: Battery charging subsystem in ruggedized PDAs and portable test equipment where firmware updates are impractical. IC Role / Device Role / Timing Role: Autonomous NiMH charger with programmable 2A current, 1.5nF timer capacitor for ~7-minute charge limit, and NTC-based temperature safety. Use Value: Guarantees consistent charge termination across battery aging and temperature variation, extending cycle life beyond 500 cycles. |
Use Scenario: Field-deployed inventory scanners operating in variable ambient temperatures from –20°C to 60°C. IC Role / Device Role / Timing Role: Charger IC enforcing strict 5°C–45°C charging window via NTC interface and providing robust undervoltage lockout at 4.36V for 2-cell operation. Use Value: Prevents unsafe charging in cold warehouses or hot vehicles by suspending charge until temperature re-enters qualified range - no firmware patch required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standalone NiMH/NiCd fast charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1555 | Single-cell only; uses thermistor-less temperature qualification via internal die sensor; 500mA max charge current. | Limited to 1-cell Li-ion or NiMH; lacks multi-cell support and external PNP drive capability. | Select MAX1555 only for space-constrained single-cell applications where die-temperature proxy suffices and 2A current is unnecessary. |
| BQ2002F | Requires external current-sense resistor; supports 1–4 cells but lacks integrated –∆V detection - relies on host µC for voltage sampling. | Needs microcontroller coordination for termination; not truly standalone; higher system-level design complexity. | Choose BQ2002F only when existing system already includes a capable µC and external sense resistor layout is acceptable. |
Compared with MAX1555 and BQ2002F, the LTC4060EDHC#PBF uniquely delivers true standalone 2A fast charging for 2-cell NiMH/NiCd with hardware-based –∆V termination, no sense resistor, and full thermal qualification - making it optimal for cost-sensitive, firmware-free docked charging systems.
Availability
LTC4060EDHC#PBF is available at Aetrix Electronics and suitable for portable medical devices, charging docks and cradles, industrial handheld terminals, and consumer portable electronics requiring stable component supply and long-term lifecycle support.
Supply support for LTC4060EDHC#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 acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for the LTC portfolio.
The LTC4060EDHC#PBF belongs to Linear's legacy standalone battery charger IC family, designed specifically for cost-effective, microcontroller-free NiMH/NiCd charging in space- and firmware-constrained portable equipment.
FAQ
What battery chemistries does the LTC4060EDHC#PBF support?
The LTC4060EDHC#PBF supports both NiMH and NiCd chemistries. The CHEM pin selects the appropriate –∆V termination threshold (8mV for NiMH, 16mV for NiCd) and adjusts voltage qualification windows. It is not designed for lithium-based batteries, which require different termination methods and safety protocols.
Can the LTC4060EDHC#PBF charge more than two NiMH cells?
Yes, the LTC4060EDHC#PBF supports 1-, 2-, 3-, or 4-series NiMH/NiCd cells. The number of cells is configured via SEL0 and SEL1 pins, which also adjust the UVLO thresholds (e.g., 4.36V for 2-cell, 6.81V for 3-cell). The 2A rating applies to the total charge current delivered to the pack, regardless of cell count.
Does the LTC4060EDHC#PBF require an external current-sense resistor?
No, the LTC4060EDHC#PBF does not require an external current-sense resistor. It uses an internal 0.03Ω precision resistor and feedback-controlled DRIVE pin to regulate charge current. An external resistor is only needed on the PROG pin (e.g., 698Ω) to set the current reference - not for sensing.
How does the LTC4060EDHC#PBF handle battery temperature qualification?
The LTC4060EDHC#PBF uses the NTC pin to monitor an external thermistor voltage divider. Charging proceeds only if the voltage falls between 0.5V (hot-init threshold) and 0.86V (cold-limit threshold), corresponding to ~5°C–45°C. Outside this window, charging pauses and resumes automatically when temperature re-enters range.
What is the purpose of the exposed pad (Pin 17) on the LTC4060EDHC#PBF DFN package?
The exposed pad (Pin 17) on the LTC4060EDHC#PBF is internally connected to GND and serves as the primary thermal path. To achieve the rated θJA of 37°C/W, it must be soldered to a PCB ground plane with adequate copper area. Without proper soldering, thermal resistance degrades to 140°C/W, risking thermal shutdown under 2A operation.
LTC4060EDHC#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1 ~ 4
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- Over Temperature, Over Voltage
- Charge Current - Max:
- 2.1A
- Battery Pack Voltage:
- 1.5V
- Voltage - Supply (Max):
- 10V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC4060EDHC#PBF FAQ
1.How can I place an order for LTC4060EDHC#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4060EDHC#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 LTC4060EDHC#PBF reliable?
The price and inventory of LTC4060EDHC#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4060EDHC#PBF is usually 5 days.
3.What payment methods are accepted for LTC4060EDHC#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4060EDHC#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4060EDHC#PBF?
LTC4060EDHC#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4060EDHC#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 LTC4060EDHC#PBF?
For technical support, including LTC4060EDHC#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4060EDHC#PBF requirements.
6.How does Aetrix verify that LTC4060EDHC#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4060EDHC#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 LTC4060EDHC#PBF meets industry standards.
7.What is the process for return or replacement of LTC4060EDHC#PBF?
All LTC4060EDHC#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4060EDHC#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 LTC4060EDHC#PBF part is unused and in its original packaging.
Return procedure for LTC4060EDHC#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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