My Inquiry
My Account
Analog Devices Inc. LTC4001EUF#TRPBF
- Part No.:
- LTC4001EUF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LTC4001EUF#TRPBF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,582
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC4001EUF#TRPBF from Analog Devices (formerly Linear Technology) is a 2A synchronous buck Li-ion battery charger IC for single-cell 4.2V systems, featuring integrated MOSFETs, ±0.5% float voltage accuracy, remote battery sensing, and thermistor-based temperature qualification. It operates from 4V–5.5V input and targets handheld computing and mobile charging docks.
For engineers reviewing the LTC4001EUF#TRPBF datasheet, LTC4001EUF#TRPBF pinout, LTC4001EUF#TRPBF application, or LTC4001EUF#TRPBF equivalent, key selection considerations include programmable 2A charge current via PROG resistor, IDET-based end-of-charge detection, automatic recharge at 4.1V, NTC thermistor interface for 0°C–50°C qualified charging, and 16-lead 4mm × 4mm QFN package with exposed thermal pad.
Technical Context
The LTC4001EUF#TRPBF implements a constant-current/constant-voltage charging algorithm using a 1.5MHz synchronous buck converter with internal P- and N-channel MOSFETs (RDS(ON) = 127mΩ / 121mΩ). It integrates Kelvin-sense inputs (BATSENS/GNDSENS) for accurate battery voltage regulation and supports trickle-charge mode below 3.1V.
Charge termination is configurable via external TIMER capacitor (0.0733µF/hr), IDET threshold resistor, or EN pin control. Temperature qualification uses dual comparators on the NTC pin with 3°C hysteresis per trip point, and fault signaling is provided through open-drain CHRG and FAULT pins with defined blink patterns for thermal events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Current | Programmable up to 2A via RPROG; enables full-rate charging of 2000mAh cells in under 1.5 hours. |
| Float Voltage | 4.2V ±0.5% (4.158V–4.242V); ensures safe, compliant Li-ion cell termination without overvoltage stress. |
| Oscillator Frequency | 1.5MHz typical; allows compact 1.5µH inductor and low-profile ceramic input/output capacitors. |
| Input Voltage Range | 4V to 5.5V; compatible with standard USB-powered wall adapters and 5V supply rails. |
| Thermal Protection | Junction shutdown at ~160°C; resumes operation at ~150°C; prevents permanent damage during sustained overload. |
| Package | 16-lead 4mm × 4mm QFN with exposed thermal pad (Pin 17 = GND); achieves θJA = 37°C/W for high-power dissipation. |
| Trickle Charge Threshold | 3.1V (rising), 3.0V (falling); initiates 50mA linear pre-charge for deeply discharged batteries. |
Pinout & Package
16-lead (4mm × 4mm) plastic QFN package with exposed thermal pad (Pin 17 = PGND). Requires soldering of exposed pad to PCB ground plane for thermal performance and electrical reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT (1) | Battery output terminal | Kelvin-connected to battery anode; requires 10µF ceramic capacitor to PGND for ripple suppression. |
| SENSE (2) | Internal sense node | Connects to external inductor; carries high di/dt switching current; must be routed with minimal loop area. |
| PGND (3) | Power ground return | High-current return path for buck switch and battery discharge; separate from signal ground. |
| GNDSENS (4) | Ground sense reference | Kelvin connection to battery cathode; establishes precision voltage reference for BATSENS regulation. |
| SW (5) | Switch node | Drain connection of internal P- and N-MOSFETs; connects to inductor; high dv/dt node requiring tight layout. |
| EN (6) | Enable control input | Pull low for normal operation; pull high to reduce IIN to <50µA and BAT leakage to <3µA. |
| CHRG (7) | Charge status indicator | Open-drain output: low during charge, weak 30µA pull-down near EOC, high-Z after timeout or fault. |
| PVIN (8) | Main power input | Connects to 4V–5.5V source; decouple with ≥10µF ceramic capacitor close to pin. |
| VINSENSE (9) | Input voltage sense | Reference for UVLO and sleep mode; tie directly to PVIN capacitor; enables automatic shutdown when VIN − VBAT < 250mV. |
| FAULT (10) | Fault status output | Logic-high indicates shorted cell, thermal fault (NTC out-of-range), or overtemperature event. |
| NTC (11) | Thermistor interface | Accepts voltage divider from NTC to GNDSENS and RNOM to VINSENSE; enables 0°C–50°C qualified charging. |
| PROG (12) | Charge current programming | 1.213V reference; sets IBAT = 1110kΩ / RPROG; 549Ω yields ~2A. |
| IDET (13) | End-of-charge detection | 1.213V reference; sets IDET threshold = 91.5kΩ / RIDET; 549Ω yields ~200mA (C/10 for 2Ah). |
| SS (14) | Soft-start/compensation | 12.8µA ramp current; 0.1µF capacitor gives ~10ms soft-start; also compensates CV and CC loops. |
| TIMER (15) | Charge timeout control | Capacitor-to-GNDSENS sets time: CTIMER = Time(hr) × 0.0733µF; connect to IDET to disable timer. |
| BATSENS (16) | Battery voltage sense | Internal 4.2V reference divider; Kelvin-connected to battery anode; disconnected in sleep/EN=H to minimize drain. |
Key Features
| Feature | Design Value |
|---|---|
| No external MOSFETs or sense resistor | Reduces BOM count by 4 components and eliminates layout sensitivity to current-sense trace routing. |
| Remote sensing at battery terminals | Compensates for PCB trace IR drop, ensuring ±0.5% regulation accuracy at actual cell terminals. |
| Programmable charge termination timer | Enables fixed-time safety cutoff independent of battery health or aging-critical for production line consistency. |
| Automatic recharge at 4.1V | Maintains battery at full capacity without user intervention; triggered only after valid timeout or load-induced voltage sag ≥4ms. |
| Thermistor input with 3°C hysteresis | Prevents thermal oscillation during marginal temperature conditions; supports Vishay R-T Curve 2 or RCOLD/RHOT ≈ 7 thermistors. |
Applications
| Digital Cameras | Smart Phones |
|---|---|
Use Scenario: Compact, high-speed charging of removable Li-ion packs in DSLR and mirrorless cameras with USB-C input. IC Role / Device Role / Timing Role: Primary constant-current/constant-voltage charger managing 2A peak current and 4.2V float regulation. Use Value: Enables <90-minute full charge cycles while maintaining cell longevity via precise voltage regulation and thermal qualification. | Use Scenario: Embedded charging solution in smartphone motherboards where space and thermal constraints limit discrete FET use. IC Role / Device Role / Timing Role: Integrated buck charger providing regulated 4.2V output with automatic recharge and NTC-based temperature monitoring. Use Value: Eliminates need for external power FETs and sense resistors, reducing PCB area by >25% versus discrete solutions. |
| Charging Docks and Cradles | Handheld Computers |
Use Scenario: Multi-device dock supporting simultaneous charging of tablets and peripherals via shared 5V rail. IC Role / Device Role / Timing Role: Dedicated Li-ion charger IC per port, enabling independent current programming and fault isolation. Use Value: Supports robust hot-plug operation with input undervoltage lockout and automatic shutdown when VIN < VBAT. | Use Scenario: Industrial handheld computers requiring reliable battery maintenance across wide ambient temperatures (−40°C to 85°C). IC Role / Device Role / Timing Role: Battery management IC delivering 2A charge current with programmable timer and NTC qualification. Use Value: Ensures safe charging across operating range via ±1% float voltage accuracy and thermal hold mode freezing timer during faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion battery charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24075RGTR | Linear charger (no inductor), max 1.5A, no NTC interface, no remote sensing | Suitable for low-power, cost-sensitive designs where efficiency and thermal density are secondary | Select when board space permits larger thermal footprint and inductor-free design is preferred. |
| MP2617GQZ | Synchronous buck charger, 2.5A max, 4.2V float, but lacks integrated NTC comparator and remote sensing pins | Used in higher-current portable devices where external thermistor conditioning is acceptable | Choose when higher peak current is needed and system-level temperature monitoring can be implemented externally. |
Compared with BQ24075RGTR and MP2617GQZ, the LTC4001EUF#TRPBF uniquely combines 2A synchronous buck efficiency, Kelvin-sense accuracy, and fully integrated NTC qualification in a single 4mm × 4mm QFN-making it optimal for space-constrained, thermally sensitive handheld chargers requiring production-ready reliability.
Availability
LTC4001EUF#TRPBF is available at Aetrix Electronics and suitable for digital cameras, smart phones, charging docks and cradles, and handheld computers requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for LTC4001EUF#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, serving industrial, automotive, communications, and consumer markets.
The LTC4001EUF#TRPBF belongs to Linear's Power Management product line, designed specifically for high-efficiency, highly integrated battery charging in portable electronics where small size, thermal performance, and functional completeness are critical.
FAQ
What is the maximum recommended charge current for the LTC4001EUF#TRPBF?
The LTC4001EUF#TRPBF supports a maximum programmed charge current of 2A, achieved with a 549Ω resistor from PROG to GNDSENS. Exceeding this value risks violating the device's internal current limits and may trigger overcurrent protection or reduce long-term reliability due to increased junction temperature.
Does the LTC4001EUF#TRPBF require an external blocking diode?
No, the LTC4001EUF#TRPBF does not require an external blocking diode. Its internal architecture includes input short-circuit protection and automatic shutdown when VIN falls below VBAT by more than 250mV, eliminating reverse current flow and associated power loss.
How is battery temperature qualification implemented in the LTC4001EUF#TRPBF?
The LTC4001EUF#TRPBF implements battery temperature qualification via its NTC pin, which monitors a voltage divider formed by an NTC thermistor and a bias resistor. Charging halts if the thermistor voltage exceeds 0.74×VIN (cold fault) or drops below 0.29×VIN (hot fault), with ~3°C hysteresis per comparator to prevent oscillation.
Can the LTC4001EUF#TRPBF operate from a 4.2V input source?
Yes, the LTC4001EUF#TRPBF operates from 4V to 5.5V, so a 4.2V input is within specification. However, at 4.2V input and 4.2V battery voltage, the automatic shutdown condition (VIN − VBAT < 250mV) will activate, disabling charging-thus minimum practical input is ~4.45V for reliable operation near full battery.
What happens to the CHRG pin during a temperature fault on the LTC4001EUF#TRPBF?
During a temperature fault, the CHRG pin on the LTC4001EUF#TRPBF blinks at ~1.5Hz (667ms period) with 20µs-wide serrations, providing both visual LED indication and fast microprocessor interrupt capability. This behavior occurs only while high-rate charging is active and the FAULT pin remains logic-high.
LTC4001EUF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current, Timer
- Fault Protection:
- Over Voltage, Short Circuit
- Charge Current - Max:
- 2A
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 5.5V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
LTC4001EUF#TRPBF FAQ
1.How can I place an order for LTC4001EUF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4001EUF#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 LTC4001EUF#TRPBF reliable?
The price and inventory of LTC4001EUF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4001EUF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4001EUF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4001EUF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4001EUF#TRPBF?
LTC4001EUF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4001EUF#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 LTC4001EUF#TRPBF?
For technical support, including LTC4001EUF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4001EUF#TRPBF requirements.
6.How does Aetrix verify that LTC4001EUF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4001EUF#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 LTC4001EUF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4001EUF#TRPBF?
All LTC4001EUF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4001EUF#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 LTC4001EUF#TRPBF part is unused and in its original packaging.
Return procedure for LTC4001EUF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC4001EUF#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…
