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Analog Devices Inc. LT1510-5IGN#PBF
- Part No.:
- LT1510-5IGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT1510-5IGN#PBF.pdf
- Description:
- IC BATT CHG MULTI-CHEM 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:120
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Product details
Overview
LT1510-5IGN#PBF from Analog Devices (formerly Linear Technology) is a constant-voltage/constant-current switching battery charger IC optimized for lithium-ion, NiMH, and NiCd batteries. It integrates a 1.5A DC / 2A peak internal NPN switch, 0.1Ω onboard current sense resistor, and precision 0.5% voltage reference. With 500kHz switching frequency, it enables compact, high-efficiency (>87% at 1.3A) charging solutions for portable electronics such as smartphones and medical handhelds.
For engineers reviewing the LT1510-5IGN#PBF datasheet, LT1510-5IGN#PBF pinout, LT1510-5IGN#PBF application, or LT1510-5IGN#PBF equivalent, key selection considerations include its 500kHz operation for small inductor size, ground-referenced current sensing capability, 3µA sleep-mode quiescent current, and thermal-limited charging current curves across input voltage and ambient temperature.
Technical Context
The LT1510-5IGN#PBF implements current-mode PWM control in a step-down (buck) topology with internal NPN switch and bootstrap-driven BOOST pin. Its dual-loop architecture uses CA1 for current sensing (via SENSE–BAT differential pair) and VA for voltage regulation (OVP pin referenced to 2.465V), enabling seamless transition from constant-current to constant-voltage charge phases.
It features programmable charging current via PROG pin (2000× scaling factor), soft-start via VC pin capacitor, undervoltage lockout at 7V on VCC, and shutdown control through VC pin pull-down. The device operates over –40°C to 85°C (Industrial grade) with junction temperature limited to 125°C and θJA = 80°C/W in GN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 500 kHz - enables use of sub-10µH inductors and reduces EMI filtering burden |
| Max Charging Current | 1.5 A DC - thermally limited; actual max depends on VIN, VBAT, and ambient temperature per derating curves |
| Voltage Reference Accuracy | ±0.5% at 25°C - ensures Li-ion float voltage accuracy within ±21 mV of 4.2V target |
| Sleep Current | 3 µA - minimizes reverse battery drain when wall adapter is disconnected |
| Current Sense Resistor | 0.1 Ω integrated - eliminates external sense resistor and simplifies layout |
| Operating Temp Range | –40°C to +85°C - Industrial grade rating suitable for embedded and portable industrial equipment |
| Package Thermal Resistance | θJA = 80°C/W - GN (SSOP-16) package requires careful PCB copper pour for thermal management |
Pinout & Package
LT1510-5IGN#PBF is housed in a 16-lead plastic SSOP (GN) package with fused corner pins connected to the die attach paddle for enhanced thermal dissipation. PCB land pattern must expand these four corner pads to maximize heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4, 15, 16) | Power and signal ground reference | Fused corner pins require direct connection to large copper plane for thermal and noise performance |
| SW (Pin 2) | Switch output node | Drives external Schottky catch diode; short trace to GND critical for EMI and efficiency |
| BOOST (Pin 3) | Bootstrap drive for internal NPN switch | VBOOST ≈ VCC + VBAT; max 55V - dictates external capacitor voltage rating |
| SENSE (Pin 5) | Current amplifier input (low-side) | Connected across internal 0.08Ω sense resistor; supports ground-referenced battery sensing |
| OVP (Pin 6) | Voltage amplifier input for CV regulation | Compares battery voltage against 2.465V reference; sets float voltage via R3/R4 divider |
| PROG (Pin 11) | Charging current programming node | Accepts resistor or DAC sink current; IPROG × 2000 = IBAT; 2.465V bias maintained internally |
| VC (Pin 12) | Inner-loop control voltage | Soft-start ramp (0.7V threshold); external 0.1µF sets ~3ms full-current ramp time |
| BAT (Pin 14) | Current amplifier input (high-side) | Completes sense path with SENSE; allows high-side or low-side current measurement |
Key Features
| Feature | Design Value |
|---|---|
| 500kHz switching frequency | Reduces inductor size to ≤10µH and lowers output ripple without increasing switching losses |
| Integrated 0.1Ω current sense | Eliminates external sense resistor, improves accuracy, and removes PCB layout sensitivity |
| Ground-referenced current sensing | Enables battery negative terminal tie directly to system ground - simplifies power domain isolation |
| 3µA sleep-mode current | Prevents measurable battery discharge during adapter disconnection - critical for long-storage devices |
| 0.5% voltage reference tolerance | Meets Li-ion float voltage accuracy requirement (±21 mV at 4.2V) without trimming resistors |
Applications
| Smartphone Battery Charger | Portable Medical Device Charger |
|---|---|
Use Scenario: Fast-charging single-cell Li-ion battery in space-constrained smartphone design with 5V–12V wall adapter input. IC Role / Device Role / Timing Role: Primary CC/CV charging controller managing full 1.3A charge cycle and automatic transition to 4.2V float mode. Use Value: 500kHz operation allows 10µH ceramic inductor (2.2mm height), reducing board area by >40% vs. 200kHz alternatives. | Use Scenario: Rechargeable battery pack in FDA-cleared handheld diagnostic instrument requiring reliable, low-drift charging under variable ambient conditions. IC Role / Device Role / Timing Role: Constant-current pre-charge and precision constant-voltage termination for medical-grade Li-ion cells. Use Value: ±0.5% reference and industrial temperature range ensure float voltage remains within ±25 mV over –40°C to +85°C operating envelope. |
| NiMH Power Tool Pack Charger | Industrial Handheld Terminal Charger |
Use Scenario: Multi-cell NiMH battery pack (9.6V nominal) in cordless power tool with fast-charge and trickle-maintain modes. IC Role / Device Role / Timing Role: High-efficiency buck charger delivering up to 1.5A CC phase, then reducing to 50mA maintenance current. Use Value: Programmable PROG pin and OVP-based voltage clamp enable dual-stage charge profile without microcontroller intervention. | Use Scenario: Ruggedized warehouse terminal with replaceable Li-ion battery, requiring field-safe charging and minimal standby drain. IC Role / Device Role / Timing Role: Standalone charger IC providing safe CC/CV charge, automatic sleep on adapter removal, and external shutdown via host MCU. Use Value: 3µA sleep current prevents >1% monthly battery self-discharge - extends shelf life during infrequent deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4000-5 | Higher integration: includes battery temperature monitoring, SMBus interface, and dual-input power path management | Requires external FETs; supports multi-chemistry with programmable termination algorithms | Choose LTC4000-5 when system-level battery safety certification (e.g., UL 2054) or fuel-gauge integration is required |
| MAX1736EUB+ | Fixed 4.2V float, no OVP resistor divider needed; lower 1.2A max charge current; 1MHz switching | Optimized for ultra-compact single-cell Li-ion only; lacks NiMH/NiCd support and programmable current | Choose MAX1736EUB+ for cost-sensitive, single-chemistry designs where board space is < 50 mm² |
Compared with LTC4000-5 and MAX1736EUB+, the LT1510-5IGN#PBF offers broader chemistry support (Li-ion/NiMH/NiCd), fully programmable current and voltage thresholds, and proven thermal robustness in SSOP-16 - making it ideal for industrial and medical chargers needing flexibility without added complexity.
Availability
LT1510-5IGN#PBF is available at Aetrix Electronics and suitable for smartphone battery charging, portable medical device power management, industrial handheld terminal recharging, and cordless power tool battery packs requiring stable component supply and long-term lifecycle continuity.
Supply support for LT1510-5IGN#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT1510 family was developed by Linear Technology specifically for high-efficiency, integrated switching battery chargers targeting portable and industrial equipment where size, thermal performance, and multi-chemistry flexibility are critical.
FAQ
What is the maximum input voltage supported by the LT1510-5IGN#PBF?
The LT1510-5IGN#PBF supports a maximum input supply voltage (VCC) of 30V. Absolute maximum ratings specify VCC ≤ 30V, with recommended operating range up to 28V. Exceeding 30V risks permanent damage to internal circuitry, including the BOOST and SW pins. For reliable operation with margin, designs should limit VCC to ≤25V when using standard 25V-rated input capacitors.
How does the LT1510-5IGN#PBF achieve constant-voltage regulation for lithium-ion batteries?
The LT1510-5IGN#PBF achieves constant-voltage regulation using its internal 2.465V precision reference and voltage amplifier (VA) connected to the OVP pin. A resistor divider (R3/R4) scales battery voltage to match this reference; when scaled voltage equals 2.465V, VA reduces charging current to maintain exact float voltage. This closed-loop method ensures ±0.5% accuracy at 25°C and ±1% over full temperature range - meeting Li-ion specification requirements without external op-amps.
Can the LT1510-5IGN#PBF charge batteries with the negative terminal grounded?
Yes, the LT1510-5IGN#PBF supports ground-referenced battery configurations. Its current sense architecture (SENSE and BAT pins) allows direct connection of the battery's negative terminal to system ground. This eliminates the need for high-side current sensing or level-shifting circuitry, simplifying PCB layout and reducing component count - especially valuable in cost-sensitive and space-constrained applications like consumer electronics.
What is the purpose of the BOOST pin on the LT1510-5IGN#PBF?
The BOOST pin on the LT1510-5IGN#PBF drives the base of the internal NPN power switch via a bootstrap capacitor, ensuring deep saturation and minimizing on-resistance (typ. 0.3Ω). During switch conduction, VBOOST ≈ VCC + VBAT, enabling efficient low-VCE(sat) operation. The pin tolerates up to 55V, so the bootstrap capacitor must be rated ≥50V. Incorrect BOOST capacitor value or placement causes poor efficiency and thermal stress - typical design uses 10nF X7R ceramic placed near the BOOST and SW pins.
Does the LT1510-5IGN#PBF require external components for basic lithium-ion charging functionality?
Yes, the LT1510-5IGN#PBF requires external components for full lithium-ion charging: an inductor (e.g., 10µH for 500kHz), Schottky catch diode (e.g., MBRM120T3), input/output capacitors (≥10µF CIN, ≥22µF COUT), and resistor divider (R3/R4) for OVP setting. However, it integrates the current sense resistor (0.1Ω), reference, and switch driver - reducing BOM count by ~7 parts versus discrete-controller solutions. No external current-sense amp or voltage reference is needed.
LT1510-5IGN#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:
- Multi-Chemistry
- Number of Cells:
- -
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- Over Voltage
- Charge Current - Max:
- 1.5A
- Battery Pack Voltage:
- 20V (Max)
- Voltage - Supply (Max):
- 28V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LT1510-5IGN#PBF FAQ
1.How can I place an order for LT1510-5IGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1510-5IGN#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 LT1510-5IGN#PBF reliable?
The price and inventory of LT1510-5IGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1510-5IGN#PBF is usually 5 days.
3.What payment methods are accepted for LT1510-5IGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1510-5IGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1510-5IGN#PBF?
LT1510-5IGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1510-5IGN#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 LT1510-5IGN#PBF?
For technical support, including LT1510-5IGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1510-5IGN#PBF requirements.
6.How does Aetrix verify that LT1510-5IGN#PBF is sourced from the original manufacturer or authorized distributors?
All LT1510-5IGN#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 LT1510-5IGN#PBF meets industry standards.
7.What is the process for return or replacement of LT1510-5IGN#PBF?
All LT1510-5IGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1510-5IGN#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 LT1510-5IGN#PBF part is unused and in its original packaging.
Return procedure for LT1510-5IGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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