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Analog Devices Inc. LT1510CS#TRPBF
- Part No.:
- LT1510CS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1510CS#TRPBF.pdf
- Description:
- IC BATT CHG MULTI-CHEM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,672
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Product details
Overview
LT1510CS#TRPBF from Analog Devices (formerly Linear Technology) is a constant-voltage/constant-current step-down battery charger IC designed for Li-ion, NiMH, and NiCd batteries. It integrates a 1.5A DC / 2A peak internal NPN switch, 0.1Ω onboard current-sense resistor, and a precision 0.5% voltage 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 LT1510CS#TRPBF datasheet, LT1510CS#TRPBF pinout, LT1510CS#TRPBF application, or LT1510CS#TRPBF equivalent, key selection criteria include its 200kHz switching frequency, thermal resistance of 50°C/W in the 16-pin SO package, ±1% OVP accuracy over temperature, soft-start via VC pin capacitor, and shutdown control via VC pin voltage ≤0.6V.
Technical Context
The LT1510CS#TRPBF implements current-mode PWM control with dual amplifiers: CA1 converts battery current through an internal 0.1Ω sense path into a proportional IPROG current (500µA/A), while CA2 compares IPROG against the PROG pin's reference-derived programming current. The 2.465V bandgap reference feeds both the OVP comparator and PROG loop, enabling precise CV charging for Li-ion cells.
Its architecture supports ground-referenced current sensing - no high-side sense required - and eliminates external blocking diodes by entering 3µA sleep mode when VCC drops below battery voltage. The BOOST pin drives the internal NPN switch into saturation, achieving low on-resistance (0.3–0.5Ω) and minimizing conduction loss at full load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 200 kHz - enables compact magnetics (e.g., 10 µH ceramic inductors) and reduces EMI filtering burden. |
| Max DC Charging Current | 1.5 A - supported continuously in 16-pin SO package with θJA = 50°C/W at TA ≤ 60°C. |
| Voltage Reference Accuracy | ±0.5% at 25°C, ±1% over –40°C to 125°C - meets Li-ion float voltage tolerance requirements without external trimming. |
| Current Sense Resistor | 0.1 Ω integrated - eliminates external sense resistor, simplifies layout, and ensures 3% typical charging current accuracy. |
| Reverse Battery Drain | 3 µA typical - prevents significant self-discharge during adapter removal or standby. |
| Undervoltage Lockout | 7 V - disables switching until input stabilizes above minimum operating threshold, preventing erratic startup. |
| Thermal Resistance | 50°C/W (θJA) - requires PCB copper pour under fused corner pins for reliable 1.5A operation at 60°C ambient. |
Pinout & Package
The LT1510CS#TRPBF is housed in a 16-lead plastic SO (S package) with four corner pins fused to the die attach paddle for thermal dissipation. These pins must be connected to expanded PCB copper lands for proper heat sinking. Package thermal resistance is θJA = 50°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Power and signal ground reference | Common return for all internal circuits; four corner GND pins are thermally fused to die paddle. |
| SW | Switch output node | Drives external Schottky catch diode; requires minimal trace length to GND to minimize ringing and EMI. |
| BOOST | Bootstrap drive for internal NPN switch | Supplies gate drive above VCC to saturate internal transistor; max VBOOST = 55V relative to GND. |
| SENSE | Current amplifier CA1 inverting input | Connected to one end of internal 0.1Ω sense resistor; allows current sensing at either battery terminal. |
| VCC | Primary supply input | Accepts 8V–28V; includes 7V UVLO; requires ≥10µF low-ESR capacitor placed near pin. |
| PROG | Charging current programming node | Sinks 500µA per amp of battery current; voltage clamped near 2.465V; accepts DAC or resistor programming. |
| VC | Inner-loop PWM control voltage | 0.7V threshold initiates switching; 0–1.1V range controls soft-start ramp; <0.6V forces shutdown. |
| BAT | Current amplifier CA1 non-inverting input | Connected to other end of internal sense resistor; completes current measurement path across battery. |
| OVP | Voltage amplifier VA input | Compares battery voltage against 2.465V reference; used for CV regulation or overvoltage protection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5A switch + 0.1Ω sense resistor | Eliminates 2–3 external components, reduces BOM cost, and guarantees current accuracy within 3% without calibration. |
| 0.5% voltage reference with ±1% temp drift | Enables direct Li-ion float voltage setting (e.g., 4.2V ±42mV) using only two 0.25% resistors in divider network. |
| Ground-referenced current sensing | Allows battery negative to tie directly to system ground - no level-shifting circuitry or isolated sense amps needed. |
| 3µA sleep-mode quiescent current | Prevents measurable battery discharge when wall adapter is unplugged, critical for portable equipment storage. |
| Soft-start via VC pin capacitor | 0.1µF capacitor yields ~3ms controlled current ramp - avoids inrush stress on input capacitors and battery terminals. |
Applications
| Smartphone Li-ion Charger | Industrial Handheld Battery Pack |
|---|---|
Use Scenario: Fast-charging single-cell 3.7V Li-ion battery in compact smartphone design with limited PCB area and thermal budget. IC Role / Device Role / Timing Role: Primary constant-current/constant-voltage charger controller managing full 1.3A charge cycle and automatic transition to 4.2V float mode. Use Value: Achieves >87% efficiency at 1.3A using 10µH ceramic inductor and eliminates external sense resistor - reducing solution size by 35% vs discrete alternatives. | Use Scenario: Rechargeable 7.2V NiMH battery pack (6×AA) in ruggedized industrial handheld scanner requiring reliable termination-free charging. IC Role / Device Role / Timing Role: Constant-current charger with programmable 0.5A/50mA dual-level output, leveraging OVP pin for overvoltage guardbanding. Use Value: Delivers ≈90% efficiency at 0.5A while supporting battery voltage range up to 12V - enabling single-charger compatibility across multiple pack configurations. |
| Medical Portable Monitor | Lithium Iron Phosphate (LiFePO₄) Backup System |
Use Scenario: Life-critical backup battery charging in portable ECG monitor where reliability, low standby drain, and predictable charge termination are mandatory. IC Role / Device Role / Timing Role: CV/CV charger with external shutdown via microcontroller-driven VC pin, ensuring fail-safe disable during fault conditions. Use Value: 3µA sleep current prevents battery depletion during months of shelf storage; VC-controlled shutdown adds hardware-enforced safety layer beyond firmware. | Use Scenario: Off-grid solar-powered remote sensor node using 3.2V LiFePO₄ cell (max 3.65V) requiring precise, low-drift voltage regulation. IC Role / Device Role / Timing Role: Adjustable constant-voltage regulator configured via R3/R4 divider to deliver exact 3.65V float voltage. Use Value: ±1% OVP accuracy over –40°C to 85°C ensures cell longevity without external voltage monitoring ICs or trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4000IGN#PBF | Wider input range (4.5V–36V), supports multi-cell Li-ion, requires external MOSFETs and sense resistor. | Used in high-power or multi-cell systems where flexibility outweighs integration; not drop-in compatible. | Select LTC4000IGN#PBF when designing for >12V input or >2S battery stacks; LT1510CS#TRPBF remains optimal for compact single-cell solutions. |
| TPS65023BRSBR | Integrated PMIC with three buck converters + Li-ion charger; 1A max charge current; fixed 4.2V OVP. | Targets OMAP/ARM-based embedded systems needing power sequencing; lacks programmable OVP. | Choose TPS65023BRSBR for SoC-centric designs requiring coordinated rail management; LT1510CS#TRPBF offers superior CV accuracy and standalone simplicity. |
Compared with LTC4000IGN#PBF and TPS65023BRSBR, the LT1510CS#TRPBF provides higher integration (internal switch + sense), tighter voltage reference (±0.5% vs ±1%), and lower solution cost for dedicated single-cell Li-ion/NiMH chargers - but lacks multi-rail or multi-cell support.
Availability
LT1510CS#TRPBF is available at Aetrix Electronics and suitable for smartphone battery charging, industrial handheld power systems, medical portable monitors, and LiFePO₄ backup systems requiring stable component supply and long-term lifecycle support.
Supply support for LT1510CS#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 and maintains full technical and manufacturing continuity for legacy Linear products including the LT1510 family.
The LT1510 product line was designed specifically for high-efficiency, integrated constant-current/constant-voltage battery charging in space-constrained portable electronics - emphasizing simplicity, thermal robustness, and Li-ion compliance without external complexity.
FAQ
What is the maximum continuous charging current supported by the LT1510CS#TRPBF?
The LT1510CS#TRPBF supports up to 1.5A DC charging current continuously in its 16-pin SO package when ambient temperature is ≤60°C and proper PCB thermal landings are implemented. This is validated by thermal derating curves showing 1.5A capability at 25V input and 8V battery voltage with θJA = 50°C/W. Peak switch current is rated at 2A for transient handling.
How does the LT1510CS#TRPBF achieve constant-voltage regulation for lithium-ion batteries?
The LT1510CS#TRPBF uses an internal 2.465V precision reference (±0.5% at 25°C) fed into the OVP pin amplifier (VA). When battery voltage, scaled by an external resistor divider (e.g., R3/R4), reaches the reference threshold, VA reduces charging current via the current-mode PWM loop - automatically transitioning from constant-current to constant-voltage mode without external circuitry.
Can the LT1510CS#TRPBF charge batteries with negative terminals grounded to system ground?
Yes. The LT1510CS#TRPBF supports ground-referenced current sensing: its SENSE and BAT pins connect across the internal 0.1Ω resistor, allowing the battery's negative terminal to tie directly to system ground. This eliminates need for high-side current sense amplifiers or level-shifted feedback paths - simplifying layout and reducing component count.
What happens to the LT1510CS#TRPBF when the input adapter is disconnected?
When VCC drops below battery voltage, the LT1510CS#TRPBF enters sleep mode drawing only 3µA typical current. The internal switch turns off, and reverse current from battery to input is blocked. This prevents battery self-discharge during storage or adapter removal - a critical feature for portable devices left unattended for extended periods.
Is the LT1510CS#TRPBF pin-compatible with the LT1510-5 variant?
No. While both share identical pinouts in the 16-pin SO package, the LT1510CS#TRPBF operates at 200kHz switching frequency, whereas the LT1510-5CS#TRPBF runs at 500kHz. This difference affects inductor selection, compensation, and EMI behavior - requiring separate layout optimization. They are functionally similar but not interchangeable without circuit review.
LT1510CS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1510CS#TRPBF FAQ
1.How can I place an order for LT1510CS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1510CS#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 LT1510CS#TRPBF reliable?
The price and inventory of LT1510CS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1510CS#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1510CS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1510CS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1510CS#TRPBF?
LT1510CS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1510CS#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 LT1510CS#TRPBF?
For technical support, including LT1510CS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1510CS#TRPBF requirements.
6.How does Aetrix verify that LT1510CS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1510CS#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 LT1510CS#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1510CS#TRPBF?
All LT1510CS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1510CS#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 LT1510CS#TRPBF part is unused and in its original packaging.
Return procedure for LT1510CS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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