LT1511CS8#PBF - 3A Multi-Chemistry Battery Charger | Analog Devices
MPN: LT1511CS8#PBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $4.85 | $485.00 |
| 500 | $4.12 | $2,060.00 |
| 1,000 | $3.67 | $3,670.00 |
Drop-in alternatives for LT1511CS8#PBF β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
LT1510CS8#PBF
β Drop-Inπ Reference alternative (not in catalog)
LT1511CS8#PBF Maximum Ratings & Electrical Characteristics
| Battery Type | Li-Ion, NiCd, NiMH, Lead-Acid |
| Input Voltage (Max) | 25 V (28 V abs max per Newark) |
| Battery Charge Voltage (Max) | 20 V |
| Charge Current (Max) | 3 A |
| Number of Series Cells | 3 |
| Charging Algorithm | Constant-Current / Constant-Voltage (CC/CV) |
| Input Current Limiting | Yes |
| Package | 8-SOIC (CS8) |
| Operating Temperature Range | 0Β°C to 70Β°C |
| Mounting Type | Surface Mount |
| Switching Frequency | [DATA_NEEDED: Switching frequency] |
| Quiescent Current | [DATA_NEEDED: Quiescent current] |
| RoHS Status | Compliant (#PBF suffix) |
| Lead-Free | Yes (#PBF suffix) |
| MSL Level | [DATA_NEEDED: MSL level] |
LT1511CS8#PBF Pin Configuration
| Pin 1 | VIN β Input supply voltage |
| Pin 2 | BAT β Battery connection |
| Pin 3 | SENSE β Current sense input |
| Pin 4 | GND β Ground |
| Pin 5 | PROG β Charge current programming |
| Pin 6 | SHDN β Shutdown control |
| Pin 7 | VCC β Internal supply |
| Pin 8 | SW β Switch node |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LT1511CS8#PBF is suitable for 6 applications: Portable Electronics Charging, Power Tools Battery Chargers, Medical Devices, Industrial Battery Backup Systems, Solar-Powered Chargers, Automotive Accessory Chargers.
Portable Electronics Charging
The LT1511CS8#PBF is ideal for charging Li-Ion batteries in portable devices such as smartphones, tablets, and power banks. Its 3A charge current enables fast charging, while the CC/CV algorithm ensures safe and efficient charging. The input current limiting allows it to draw power from USB ports without overloading them. The compact 8-SOIC package fits space-constrained designs, and the wide input voltage range accommodates various wall adapters. With proper thermal management, the device can deliver high charge currents while maintaining reliability.
Recommended
Power Tools Battery Chargers
In power tools, the LT1511CS8#PBF can charge NiCd, NiMH, or Li-Ion battery packs. Its 3A charge current is suitable for high-capacity packs, and the input current limiting prevents overloading the charger's power supply. The device's robust input voltage range (up to 25V) allows it to operate from a variety of AC adapters. The CC/CV charging profile is essential for Li-Ion packs, while NiCd and NiMH can be charged with appropriate termination. The compact package enables integration into tool chargers with limited PCB space.
Recommended
Medical Devices
Medical devices such as portable monitors and infusion pumps require reliable battery charging. The LT1511CS8#PBF's constant-current/constant-voltage charging ensures safe and predictable charging of Li-Ion batteries, which is critical for patient safety. The input current limiting protects the device's power supply, and the wide input voltage range allows operation from various medical-grade adapters. The device's commercial temperature range (0Β°C to 70Β°C) is suitable for most medical environments. Its small footprint is advantageous for compact medical devices.
Recommended
Industrial Battery Backup Systems
The LT1511CS8#PBF can be used in industrial battery backup systems to charge lead-acid or Li-Ion batteries. Its ability to handle input voltages up to 25V makes it suitable for 24V industrial supplies. The input current limiting prevents overloading the supply, and the CC/CV charging profile is appropriate for lead-acid batteries with proper voltage settings. The device's robust design and wide operating range make it reliable in industrial environments. The 8-SOIC package is easy to integrate into existing control boards.
Recommended
Solar-Powered Chargers
In solar-powered charging systems, the LT1511CS8#PBF's input current limiting is crucial to prevent overloading the solar panel. The device can charge batteries from a solar panel with varying output voltage, thanks to its wide input range. The CC/CV charging algorithm ensures efficient charging of Li-Ion or lead-acid batteries. The low quiescent current (if specified) helps maximize energy harvest. The compact package is suitable for portable solar chargers. Designers should ensure the solar panel's maximum power point is within the input voltage range.
Recommended
Automotive Accessory Chargers
The LT1511CS8#PBF can be used in automotive accessory chargers for charging devices like jump starters or portable power packs. Its input voltage range up to 25V allows it to operate from a 12V or 24V vehicle electrical system. The input current limiting prevents overloading the vehicle's power outlet. The device's CC/CV charging is suitable for Li-Ion batteries used in these accessories. However, the commercial temperature range (0Β°C to 70Β°C) may not be sufficient for under-hood applications, so it is best suited for cabin-mounted chargers.
Recommended
Recommended Products Summary
Engineering reference data for LT1511CS8#PBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LT1510CS8#PBF | LT1511CSW#PBF | BQ24133RGYR |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 24-SOIC | 24-VQFN |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Max Charge Current | 3A | 1.5A | 3A | 3A |
| Input Voltage (Max) | 25V | 25V | 25V | 17V |
| Battery Charge Voltage (Max) | 20V | 20V | 20V | 15V |
| Battery Chemistry | Li-Ion, NiCd, NiMH, Lead-Acid | Li-Ion, NiCd, NiMH | Li-Ion, NiCd, NiMH, Lead-Acid | Li-Ion, Li-Pol |
| Operating Temperature Range | 0Β°C to 70Β°C | 0Β°C to 70Β°C | 0Β°C to 70Β°C | -40Β°C to 85Β°C |
| Input Current Limiting | Yes | Yes | Yes | Yes |
Key Differentiators
- Higher charge current (3A) compared to LT1510CS8#PBF (1.5A) (vs LT1510CS8#PBF)
- Supports lead-acid batteries in addition to Li-Ion, NiCd, NiMH (vs BQ24133RGYR)
- Higher input voltage range (25V) compared to BQ24133RGYR (17V) (vs BQ24133RGYR)
Design Notes
The LT1511CS8#PBF can dissipate significant power when charging at 3A, especially if the input voltage is much higher than the battery voltage. For example, with VIN=20V and battery voltage=12V, the power dissipation is approximately (20-12)*3 = 24W, which is excessive for an 8-SOIC package. Ensure adequate PCB copper area and consider using a lower charge current or a higher-efficiency topology if thermal issues arise.
Place the sense resistor and input/output capacitors close to the IC to minimize parasitic inductance and ensure accurate current sensing. Use a low-ESR ceramic capacitor on the input and output. The switch node (SW) should have a short, wide trace to reduce EMI. Follow the layout guidelines in the datasheet for optimal performance.
Do not exceed the absolute maximum input voltage of 28V. Ensure the battery voltage does not exceed the maximum charge voltage. The PROG pin sets the charge current; use a precision resistor to avoid overcharging. Also, the SHDN pin must be properly driven to enable charging; leaving it floating may cause unpredictable behavior.
Compliance Information
RoHS compliant and lead-free as indicated by #PBF suffix. Not AEC-Q100 qualified. REACH and conflict minerals status not specified in provided data.
