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Analog Devices Inc. LT1510IS8#TRPBF
- Part No.:
- LT1510IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1510IS8#TRPBF.pdf
- Description:
- IC BATT CHG MULTI-CHEM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,447
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Product details
Overview
LT1510IS8#TRPBF from Analog Devices (formerly Linear Technology) is a constant-voltage/constant-current switching battery charger IC for Li-ion, NiCd, and NiMH batteries. It integrates a 1.5A DC/2A peak internal NPN switch, 0.1Ω onboard current-sense resistor, and 0.5% precision 2.465V reference. It operates from 8V to 28V input, charges batteries from 2V to 20V, and delivers >87% efficiency at 1.3A in Li-ion applications.
For engineers reviewing the LT1510IS8#TRPBF datasheet, LT1510IS8#TRPBF pinout, LT1510IS8#TRPBF application, or LT1510IS8#TRPBF equivalent, key selection criteria include its 200kHz fixed-frequency current-mode PWM architecture, ground-referenced current sensing capability, 3µA sleep-mode quiescent current when VCC is disconnected, thermal-limited charging current profile for 8-pin SO packages, and industrial-grade (–40°C to 85°C) operation.
Technical Context
The LT1510IS8#TRPBF implements a step-down (buck) current-mode PWM topology with internal NPN switch and bootstrap-driven BOOST pin. Its dual-loop control uses CA1 for current sensing (via SENSE/BAT pins and 0.1Ω internal sense path) and VA amplifier for voltage regulation via OVP pin referenced to 2.465V.
It supports programmable charging current via single resistor (RPROG) at PROG pin with ±3% typical accuracy, soft-start via 0.1µF capacitor on VC pin, and external shutdown by pulling VC ≤0.6V. Undervoltage lockout activates below 7V on VCC, and reverse battery drain is limited to 3µA in sleep mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charging Current Accuracy | ±3% typical - enables precise CC/CV transition without calibration. |
| Reference Voltage | 2.465V ±0.5% at 25°C - meets Li-ion float voltage tolerance requirements. |
| Switching Frequency | 200kHz ±10% - balances efficiency, inductor size, and EMI performance. |
| Max DC Battery Current | 1.5A - sets upper bound for continuous charge delivery in thermally managed layouts. |
| Sleep-Mode Current | 3µA - minimizes battery discharge when wall adapter is unplugged. |
| Operating Temp Range | –40°C to +85°C - qualified for industrial ambient conditions. |
| Input Voltage Range | 8V to 28V - supports wide-input adapters while requiring ≥2V headroom over VBAT. |
Pinout & Package
LT1510IS8#TRPBF is housed in an 8-pin plastic SOIC (SO-8) package with θJA = 125°C/W, optimized for surface-mount assembly and moderate-power battery charging applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch Output | Drives external Schottky catch diode; requires short trace to GND for low parasitic inductance. |
| BOOST | Bootstrap Driver | Supplies gate drive to internal NPN switch; VBOOST = VCC + VBAT during ON time. |
| GND | Ground Reference | Common return for all analog and power circuits; multiple GND pins share die attach paddle. |
| SENSE | Current Sense Input (+) | Connects to high-side of internal 0.1Ω sense resistor; enables battery-terminal-independent current monitoring. |
| VCC | Supply Input | Power source (8–28V); includes 7V UVLO threshold and internal clamp to VC pin. |
| PROG | Current Programming | Accepts resistor or DAC sink current to set IBAT; nominal 2.465V bias enables RPROG = 2.465V/(IBAT/2000). |
| VC | Control Loop Output | Inner-loop PWM ramp output; 0.1µF capacitor sets soft-start rate; pulled low to shut down switching. |
| BAT | Current Sense Input (–) | Completes current-sense path with SENSE; allows direct grounding of battery negative terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5A Switch + 0.1Ω Sense Resistor | Eliminates external MOSFET and discrete sense resistor, reducing BOM count and layout area. |
| Ground-Referenced Current Sensing | Allows battery negative terminal to tie directly to system GND, simplifying thermal and grounding design. |
| 0.5% Voltage Reference Accuracy | Ensures Li-ion float voltage stays within ±1% of 4.2V target across temperature, meeting cell manufacturer specs. |
| 3µA Sleep-Mode Drain | Prevents measurable battery self-discharge during adapter removal, critical for portable equipment standby life. |
| Programmable Charging Current via Single Resistor | Enables accurate 0.1A–1.5A charge rates using one 1/10W resistor, no DAC or microcontroller required. |
Applications
| Smartphone Li-ion Charger | Industrial Handheld Battery Pack |
|---|---|
Use Scenario: Fast-charging single-cell 3.7V Li-ion battery in compact mobile device with wall adapter input. IC Role / Device Role / Timing Role: Constant-current/constant-voltage charger IC managing full-charge cycle without external termination circuitry. Use Value: Delivers >87% efficiency at 1.3A with integrated switch and sense resistor, minimizing heat and PCB area in space-constrained designs. | Use Scenario: Charging multi-cell (2S–5S) Li-ion or NiMH packs in ruggedized field instruments operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade battery management front-end providing programmable CC/CV profiles and robust UVLO protection. Use Value: Guaranteed –40°C to +85°C operation and 3µA sleep current ensure reliable long-term deployment in unattended remote equipment. |
| Medical Portable Monitor | Emergency Lighting Backup System |
Use Scenario: Recharging sealed lead-acid or Li-ion backup battery in battery-powered patient monitor with strict safety and reliability requirements. IC Role / Device Role / Timing Role: Primary charging controller implementing precise voltage regulation and soft-start to prevent inrush stress on battery and system capacitors. Use Value: 0.5% reference accuracy and controlled VC ramp reduce risk of overvoltage damage to sensitive medical battery cells. | Use Scenario: Maintaining charge on 12V SLA or NiCd battery in AC-failed emergency lighting systems with infrequent but critical discharge cycles. IC Role / Device Role / Timing Role: Low-quiescent-current charger maintaining float voltage while drawing minimal power from standby AC supply. Use Value: 3µA sleep-mode current prevents measurable battery drain during extended AC-off periods, extending backup readiness time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4000EMS#PBF | External PMOS switch driver; supports higher input voltage (up to 36V); no integrated switch or sense resistor. | Requires external MOSFET and sense resistor; suited for >2A or multi-chemistry adaptive charging with microcontroller supervision. | Select when flexibility in switch selection, higher current, or programmable termination algorithms are required. |
| TPS65023RSBR | Integrated triple-output PMIC with dedicated Li-ion charger (500mA max); includes buck converters and LDOs. | System PMIC rather than standalone charger; limited to lower-current applications and fixed-feature integration. | Select when co-locating battery charging with power sequencing and rail generation in embedded processors. |
Compared with LTC4002EMS#PBF and TPS65023RSBR, LT1510IS8#TRPBF provides the simplest, lowest-BOM solution for fixed 1.5A CC/CV charging with no external switch or sense components, while maintaining industrial temperature rating and sub-µA sleep drain - ideal for cost-sensitive, thermally constrained, or standalone charger designs.
Availability
LT1510IS8#TRPBF is available at Aetrix Electronics and suitable for smartphone battery chargers, industrial handheld devices, medical portable monitors, and emergency lighting backup systems requiring stable component supply and long-term manufacturability.
Supply support for LT1510IS8#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.
The LT1510 product line was designed specifically for efficient, integrated constant-current/constant-voltage battery charging in portable and industrial equipment - emphasizing simplicity, accuracy, and thermal robustness without external active components.
FAQ
What is the maximum continuous charging current supported by the LT1510IS8#TRPBF?
The LT1510IS8#TRPBF supports up to 1.5A DC battery charging current under thermally managed conditions. Its actual deliverable current depends on input voltage, battery voltage, ambient temperature, and PCB copper area. At 60°C ambient and 16V input charging an 8V battery, the thermally limited maximum is ~1.1A for the 8-pin SO package (θJA = 125°C/W), as shown in Figure G12 of the datasheet. Exceeding this limit risks junction temperature exceeding 125°C.
How does the LT1510IS8#TRPBF achieve constant-voltage regulation for lithium-ion batteries?
The LT1510IS8#TRPBF achieves constant-voltage regulation using its internal 2.465V ±0.5% precision reference and voltage amplifier (VA) connected to the OVP pin. When battery voltage rises, the VA compares it against the reference via an external resistor divider (e.g., R3/R4). Once the divided voltage reaches 2.465V, VA reduces the charging current to maintain float voltage - enabling full Li-ion CC/CV charging without external termination circuitry.
Can the LT1510IS8#TRPBF charge nickel-based batteries like NiCd or NiMH?
Yes, the LT1510IS8#TRPBF can charge NiCd and NiMH batteries, but requires external charge termination circuitry not integrated into the IC. Unlike Li-ion, these chemistries lack inherent voltage-based full-charge detection; the LT1510IS8#TRPBF provides only constant-current delivery. Figures 5 and 6 in the datasheet show example NiMH/NiCd charger designs using external comparators or microcontrollers to detect dV/dt or temperature rise for termination.
What is the purpose of the BOOST pin on the LT1510IS8#TRPBF, and how should it be connected?
The BOOST pin on the LT1510IS8#TRPBF supplies gate drive to the internal NPN switch by bootstrapping from SW to VCC. During switch ON, BOOST voltage equals VCC + VBAT, enabling low saturation voltage and high efficiency. It must be connected through a ceramic capacitor (typically 0.22µF) from BOOST to SW, placed close to the IC. Exceeding 55V on BOOST violates absolute maximum ratings and may cause permanent damage.
Does the LT1510IS8#TRPBF require a blocking diode between the IC and battery?
No, the LT1510IS8#TRPBF does not require an external blocking diode. When the input adapter is disconnected, the IC enters sleep mode and draws only 3µA from the battery. The internal architecture prevents reverse current flow from battery to VCC, eliminating both conduction loss and board space associated with a series diode - a key advantage over linear or non-sleep-mode switching chargers.
LT1510IS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 8-SO
LT1510IS8#TRPBF FAQ
1.How can I place an order for LT1510IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1510IS8#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 LT1510IS8#TRPBF reliable?
The price and inventory of LT1510IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1510IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1510IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1510IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1510IS8#TRPBF?
LT1510IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1510IS8#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 LT1510IS8#TRPBF?
For technical support, including LT1510IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1510IS8#TRPBF requirements.
6.How does Aetrix verify that LT1510IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1510IS8#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 LT1510IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1510IS8#TRPBF?
All LT1510IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1510IS8#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 LT1510IS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1510IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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