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Analog Devices Inc. LTC4007EGN#PBF
- Part No.:
- LTC4007EGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC4007EGN#PBF.pdf
- Description:
- IC BATT CHG LI-ION 3-4CEL 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,852
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Product details
Overview
LTC4007EGN#PBF from Analog Devices is a standalone synchronous buck-mode Li-ion battery charger controller for 3- or 4-cell packs, delivering up to 4A charge current with ±0.8% voltage accuracy, ±4% current programming accuracy, and 96% peak efficiency. It integrates thermistor-based temperature qualification, programmable termination timer, and C/10 charge completion detection - used in notebook computers and portable instrumentation.
For engineers reviewing the LTC4007EGN#PBF datasheet, LTC4007EGN#PBF pinout, LTC4007EGN#PBF application, or LTC4007EGN#PBF equivalent, key selection criteria include its 24-pin SSOP package, 6V–28V input range, 12.6V/16.8V float voltage support, thermistor input (NTC), and dual-gate drive outputs (TGATE/BGATE) for external MOSFETs.
Technical Context
The LTC4007EGN#PBF implements a constant-off-time, current-mode PWM architecture with synchronous rectification, enabling quasi-constant switching frequency (255–345 kHz) across wide VIN/VOUT ratios and eliminating audible noise with ceramic capacitors. Its inner-loop control uses ITH voltage to regulate peak inductor current via CSP–BAT sensing and PROG-resistor programming.
It features integrated protection functions: overvoltage shutdown (102–110% of programmed float), reverse-current blocking via INFET driver, thermal suspension via NTC sampling, and low-battery preconditioning (2.5V/cell threshold). The FAULT, FLAG, CHG, and LOBAT pins provide discrete status signaling without requiring microcontroller intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 28V - supports universal AC adapters and industrial DC supplies without external regulation |
| Charge Voltage Accuracy | ±0.8% - ensures cell-level voltage compliance for 4.2V/cell (12.6V/16.8V) and 4.1V/cell (12.3V/16.4V) chemistries |
| Charge Current Accuracy | ±4% - achieved via PROG-resistor programming and CSP–BAT current sense amplifier with 11.67µA bias compensation |
| Max Output Current | Exceeds 4A - enabled by high-efficiency synchronous buck topology and 98% max duty cycle |
| Operating Temp Range | –40°C to +85°C - qualified for industrial and portable equipment environments |
| Switching Frequency | 255–345 kHz - avoids AM radio band and enables compact magnetics and ceramic output filtering |
| Package | 24-Lead Narrow SSOP - surface-mount compatible with standard reflow profiles and 0.635mm pitch |
Pinout & Package
Package: 24-Lead Plastic SSOP (GN), 0.635mm lead pitch, θJA = 88°C/W, rated for –40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DCIN (1) | Primary power input | Accepts 6–28V supply; UVLO triggers at 4.2–5.5V rising edge; drives INFET gate and CLN reference |
| CHG (2) | Charge status indicator | Open-drain active-low output pulled low during charging; can defeat timer when forced <1V |
| ACP (3) | AC adapter presence flag | Open-drain output pulled low if DCIN < BAT; indicates valid input source for system power management |
| RT (4) | Charge termination timer set | Resistor-to-GND sets tTIMER = 1 hour × RRT/154kΩ; mandatory for functional operation |
| FAULT (5) | Fault condition indicator | Active-low open-drain signal asserted on thermistor violation, low-battery timeout (>T/4), or OV fault |
| GND (6) | Analog/digital ground reference | Low-power circuit return; separate from PGND to minimize noise coupling into sensing paths |
| 3C4C (7) | Cell count select | Pull to GND for 3-cell (12.3V/12.6V), leave open for 4-cell (16.4V/16.8V); internal 14µA pull-up |
| LOBAT (8) | Low-battery detection | Active-low output asserted when VBAT < 2.5V/cell (or 2.44V/cell for 4.1V chemistry) |
| NTC (9) | Thermistor interface | Sampled periodically to suspend charging outside safe temperature range; disable with 300–500kΩ to DCIN |
| ITH (10) | Inner-loop current control | Voltage-controlled node setting peak inductor current; compensated with 6kΩ + ≥0.1µF to GND |
| PROG (11) | Current programming/monitoring | Resistor-to-GND programs full-scale current (1.19V = ICHARGE × RSENSE); voltage linearly tracks actual current |
| NC (12) | No connect | Unbonded pad; must remain floating |
| ICL (13) | Input current limit indicator | Active-low signal asserted when CLP–CLN > 100mV, indicating AC adapter current limiting is active |
| CSP (14) | Current sense positive input | High-side input to CA1 amplifier; measures voltage across external RSENSE between CSP and BAT |
| BAT (15) | Battery voltage sense | Negative reference for RSENSE; internal divider sets float voltage; disconnected during shutdown |
| CHEM (16) | Chemistry select | Pull to GND for 4.1V/cell (12.3V/16.4V), open for 4.2V/cell (12.6V/16.8V); internal 14µA pull-up |
| FLAG (17) | C/10 charge completion | Active-low latch indicating charging current has dropped to ≤10% of programmed value |
| CLP (18) | Input current limit positive | Positive input to CL1 amplifier; threshold = CLN + 100mV; requires RC filter for noise immunity |
| CLN (19) | Input current limit reference | Negative reference for CL1; also serves as IC power rail; bypass with 10–22µF capacitor |
| TGATE (20) | Top P-MOSFET gate driver | Drives external high-side P-channel FET; logic-high = off, logic-low = on; 50mV drop at –1mA |
| PGND (21) | Power ground return | High-current return path for BGATE driver and inductor; separate from signal GND |
| BGATE (22) | Bottom N-MOSFET gate driver | Drives external low-side N-channel FET; 4.5–10V swing into 3000pF load; 40–90ns transition times |
| INFET (23) | Input PFET gate driver | Controls external input P-FET for reverse-current blocking and AC-present indication |
| SHDN (24) | Shutdown control | Active-high input; forces full shutdown and timer reset; internal 10µA pull-up to 3.5V |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck controller with TGATE/BGATE drivers | Enables >96% efficiency and eliminates external diode losses in high-current Li-ion charging |
| Programmable 3-/4-cell float voltage with CHEM/3C4C pins | Supports both 4.1V and 4.2V/cell chemistries across 12.3V–16.8V range without external resistors |
| Integrated thermistor interface with automatic suspension | Eliminates need for external ADC or microcontroller polling; samples NTC at intervals set by RT resistor |
| C/10 charge termination with latched FLAG output | Provides unambiguous end-of-charge signal independent of timer, enabling precise state-machine control |
| Input current limiting with CLP/CLN differential amplifier | Allows dynamic adaptation to weak AC adapters while maintaining system load priority and preventing brownouts |
| Low-battery preconditioning and fault timeout | Initiates safe trickle charge below 2.5V/cell and terminates after 25% of total charge time if no recovery occurs |
Applications
| Notebook Computers | Portable Instruments |
|---|---|
Use Scenario: Embedded battery charging subsystem in clamshell laptops with dual-cell or quad-cell Li-ion packs. IC Role / Device Role / Timing Role: Standalone charger controller managing constant-current/constant-voltage profile, thermistor monitoring, and AC adapter handoff. Use Value: Enables compact, fanless design with 96% efficiency and no audible noise - critical for user experience and thermal envelope. |
Use Scenario: Handheld multimeters and portable oscilloscopes requiring long runtime and reliable battery maintenance. IC Role / Device Role / Timing Role: Primary charge management IC handling 3-cell pack conditioning, low-leakage sleep mode (<15µA), and C/10 termination. Use Value: Extends battery standby time and prevents overcharge degradation through ±0.8% voltage accuracy and automatic restart at 3.9V/cell. |
| Battery-Backup Systems | Standalone Li-Ion Chargers |
Use Scenario: Rack-mounted UPS modules with hot-swappable 4-cell Li-ion battery cartridges. IC Role / Device Role / Timing Role: High-reliability charger supervising voltage, temperature, and current limits with FAULT/FLAG status reporting. Use Value: Ensures fail-safe operation via thermistor suspension, OV shutdown (102–110%), and reverse-current blocking through INFET driver. |
Use Scenario: Benchtop lab chargers supporting multiple Li-ion configurations via front-panel DIP switches. IC Role / Device Role / Timing Role: Core controller implementing programmable charge current (via PROG), cell count (3C4C), and chemistry (CHEM) selection. Use Value: Simplifies multi-chemistry support with pin-strapped configuration - no firmware required for 4.1V vs 4.2V/cell or 3- vs 4-cell operation. |
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 |
|---|---|---|---|
| BQ24725ARHBT | 3.5A max current; SMBus interface; no integrated thermistor sampling; requires external MCU for configuration | Designed for server/enterprise battery systems with host communication; lacks autonomous NTC handling | Choose when SMBus telemetry and host-controlled charge profiles are required over autonomous operation |
| MAX1747EVKIT+ | 4.5A capability; 5V–24V input; no pin-selectable 3C4C/CHEM; fixed 4.2V/cell only; evaluation board format | Targeted at rapid prototyping; lacks production-ready pin-strapped flexibility for multi-chemistry support | Choose for quick validation of buck-charger topology where 4.2V/cell and 4-cell-only operation suffice |
Compared with BQ24725ARHBT and MAX1747EVKIT+, the LTC4007EGN#PBF provides fully autonomous, pin-configurable 3-/4-cell and 4.1-/4.2V/cell operation with integrated thermistor management - reducing BOM count and eliminating MCU dependency in cost-sensitive portable designs.
Availability
LTC4007EGN#PBF is available at Aetrix Electronics and suitable for notebook computers, portable instrumentation, and battery-backup systems requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature performance.
Supply support for LTC4007EGN#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., formerly Linear Technology) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC4007EGN#PBF belongs to the LTC® battery management controller family, designed specifically for high-efficiency, autonomous, multi-cell Li-ion charging in space-constrained portable and industrial systems.
FAQ
What is the maximum supported battery voltage for LTC4007EGN#PBF?
The LTC4007EGN#PBF supports two float voltage ranges: 12.3V/12.6V for 3-cell packs and 16.4V/16.8V for 4-cell packs, selected via the 3C4C and CHEM pins. Its absolute maximum CSP and BAT pin rating is +28V relative to GND, allowing robust operation with margin above nominal float voltages.
Does LTC4007EGN#PBF require an external microcontroller to operate?
No, the LTC4007EGN#PBF is a fully autonomous charger controller. All core functions - including charge termination, thermistor monitoring, C/10 detection, low-battery preconditioning, and input current limiting - are implemented in hardware. No firmware or host processor is needed for basic operation.
How is charge current programmed on LTC4007EGN#PBF?
Charge current is programmed using an external resistor (RPROG) from the PROG pin to GND, in conjunction with an external sense resistor (RSENSE) between CSP and BAT. Full-scale current is calculated as ICHARGE(MAX) = (1.19V / RPROG − 11.67µA) × (3.01kΩ / RSENSE), achieving ±4% accuracy.
Can LTC4007EGN#PBF be used with 4.1V/cell lithium iron phosphate (LiFePO₄) batteries?
No - the CHEM pin selects only between 4.1V/cell and 4.2V/cell lithium-ion chemistries. LiFePO₄ (typically 3.2–3.65V/cell) is not supported. The internal voltage references, error amplifier thresholds, and termination logic are optimized exclusively for Li-ion voltage profiles.
What happens to battery leakage current when LTC4007EGN#PBF is in shutdown mode?
In shutdown mode (SHDN = HIGH), the LTC4007EGN#PBF reduces battery leakage current to ≤35µA (typical 15µA), preserving battery charge during extended storage. This is achieved by disconnecting the internal voltage divider on the BAT pin and disabling all bias currents except essential leakage paths.
LTC4007EGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 3 ~ 4
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- -
- Charge Current - Max:
- -
- Battery Pack Voltage:
- 16.8V
- Voltage - Supply (Max):
- 28V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
LTC4007EGN#PBF FAQ
1.How can I place an order for LTC4007EGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4007EGN#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 LTC4007EGN#PBF reliable?
The price and inventory of LTC4007EGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4007EGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC4007EGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4007EGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4007EGN#PBF?
LTC4007EGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4007EGN#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 LTC4007EGN#PBF?
For technical support, including LTC4007EGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4007EGN#PBF requirements.
6.How does Aetrix verify that LTC4007EGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4007EGN#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 LTC4007EGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC4007EGN#PBF?
All LTC4007EGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4007EGN#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 LTC4007EGN#PBF part is unused and in its original packaging.
Return procedure for LTC4007EGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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