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Analog Devices Inc. LT1510-5IGN#TRPBF
- Part No.:
- LT1510-5IGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT1510-5IGN#TRPBF.pdf
- Description:
- IC BATT CHG MULTI-CHEM 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,248
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Product details
Overview
LT1510-5IGN#TRPBF 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. Operating at 500kHz switching frequency, it enables compact, high-efficiency (>87% at 1.3A) Li-ion charging in space-constrained portable electronics.
For engineers reviewing the LT1510-5IGN#TRPBF datasheet, LT1510-5IGN#TRPBF pinout, LT1510-5IGN#TRPBF application, or LT1510-5IGN#TRPBF equivalent, key selection criteria include its 500kHz operation enabling small inductors, ground-referenced current sensing, 3µA sleep-mode quiescent current, and ±1% OVP accuracy over temperature - all critical for reliable single-cell to multi-cell battery management in consumer and industrial chargers.
Technical Context
The LT1510-5IGN#TRPBF implements current-mode PWM control with an internal NPN power switch driven via BOOST pin bootstrapping. Its dual-loop architecture uses CA1 for precise current sensing (500µA/A transconductance) and VA for voltage regulation, with PROG pin programming enabling accurate 1.5A charging current set via a single resistor.
It features undervoltage lockout (7V), soft-start via VC pin capacitor, external shutdown via VC pin pull-down, and reverse-battery drain protection (3µA). The 500kHz version reduces inductor size versus the 200kHz LT1510 while maintaining identical functional architecture and pin compatibility within the GN package family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 500kHz typical - enables use of sub-10µH inductors and reduces EMI filter size. |
| Max Charging Current | 1.5A DC (2A peak) - supports fast-charging of single- to 4-cell Li-ion or NiMH packs. |
| Voltage Reference Accuracy | ±0.5% at 25°C, ±1% over –40°C to 85°C - ensures tight 4.2V float voltage compliance for Li-ion cells. |
| Sleep-Mode Current | 3µA typical - eliminates battery drain when wall adapter is disconnected. |
| Input Voltage Range | 8V to 28V - accommodates common 9–24V wall adapters and automotive-derived supplies. |
| Battery Voltage Range | 2V to 20V - supports single-cell Li-ion (4.2V) up to 5-cell NiMH (6V/cell) or custom configurations. |
| Thermal Resistance (θJA) | 80°C/W - specified for 16-pin GN (SSOP) package with fused corner pins for thermal pad attachment. |
Pinout & Package
The LT1510-5IGN#TRPBF is housed in a 16-lead plastic SSOP (GN) package with four fused corner pins connected internally to the die attach paddle for enhanced thermal dissipation. PCB land pattern must expand these corner pads for effective heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference for all analog and power circuits | Multiple GND pins (pins 1, 4, 8, 15) provide low-impedance return paths and reduce noise coupling. |
| 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; VBOOST = VCC + VBAT during switch ON; max 55V rating. |
| SENSE | Current-sense amplifier input (low-side) | Connected to one end of internal 0.1Ω sense resistor; enables ground-referenced current monitoring. |
| BAT | Current-sense amplifier input (high-side) | Connected to other end of internal sense resistor; allows sensing at either battery terminal. |
| VCC | Primary supply input | Accepts 8–28V; includes 7V UVLO; requires ≥10µF low-ESR bypass capacitor near pin. |
| PROG | Charging current programming node | Accepts resistor or DAC sink current; 2.465V reference enables 1.5A set with ~3.28kΩ. |
| VC | Inner-loop control voltage | 0.7–1.1V range controls soft-start ramp; pulled low to shut down switching. |
| OVP | Voltage regulation feedback input | Compares against 2.465V reference; used for CV mode or overvoltage protection. |
| NC | No-connect | Pins 6 and 13 are unconnected; must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| 500kHz fixed-frequency PWM | Reduces inductor volume by >50% vs 200kHz variant, enabling ultra-compact charger designs. |
| Integrated 0.1Ω current-sense resistor | Eliminates external sense resistor and associated layout sensitivity; improves accuracy and saves board space. |
| Ground-referenced current sensing | Allows direct connection of battery negative to system ground - simplifies PCB routing and isolation. |
| 3µA sleep-mode current | Prevents parasitic battery discharge when input is removed - critical for long-term storage reliability. |
| 0.5% voltage reference tolerance | Meets stringent Li-ion float voltage requirements (±21mV at 4.2V) without external trimming. |
| External shutdown via VC pin | Enables microcontroller-controlled enable/disable with <0.8V threshold - supports system-level power sequencing. |
Applications
| Smartphone Fast Charger | Industrial Handheld Battery Pack |
|---|---|
|
Use Scenario: Compact 1.3A Li-ion charger for single-cell 3.7V/4.2V batteries in smartphones with limited PCB area. IC Role / Device Role / Timing Role: Constant-current/constant-voltage charger IC managing full charge cycle without external termination circuitry. Use Value: 500kHz operation allows 10µH ceramic inductor (2.2mm height), reducing solution footprint by 40% vs lower-frequency alternatives. |
Use Scenario: Ruggedized 2–4 cell NiMH battery charger for handheld test equipment operating across –20°C to 60°C ambient. IC Role / Device Role / Timing Role: High-efficiency buck-mode charger with programmable current and OVP protection for field-deployable tools. Use Value: ±1% OVP accuracy over temperature and 3µA sleep current ensure battery longevity and safety in unattended operation. |
| Medical Portable Monitor | Wireless Headset Charging Dock |
|
Use Scenario: Low-noise, low-power Li-ion charger for Class II medical devices requiring IEC 60601-1 compliance and zero standby drain. IC Role / Device Role / Timing Role: Primary battery management IC delivering regulated 4.2V float voltage with automatic CC/CV transition. Use Value: 3µA sleep current and integrated sense resistor eliminate risk of battery over-discharge during extended idle periods. |
Use Scenario: Space-constrained charging dock for true wireless stereo (TWS) earbuds with dual 50mAh Li-ion cells. IC Role / Device Role / Timing Role: Dual-channel capable charger IC (via two instances) providing independent 0.5A charging per earbud. Use Value: Single-resistor current programming and 500kHz switching enable <100mm² total solution size per channel. |
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 MOSFET drivers, thermistor interface, and SMBus/I²C control; 300kHz switching; no internal sense resistor. | Requires external power FETs and sense resistor; suited for programmable, multi-chemistry systems with telemetry needs. | Select LTC4000-5 when digital control, battery temperature monitoring, or flexible chemistry support is required - not for cost-sensitive, fixed-function Li-ion chargers. |
| TPS65023B | PMIC with integrated LDOs, buck converters, and charger; 1.5A max charge current; 500kHz; separate PROG pin; ±0.5% reference. | Designed for OMAP/ARM-based portable systems; includes system power rails - adds complexity if only charging function is needed. | Choose TPS65023B when co-locating system power and battery charging on same die reduces BOM count - avoid if standalone charger simplicity is prioritized. |
Compared with LT1510-5IGN#TRPBF, LTC4000-5 offers digital configurability at higher cost and layout complexity, while TPS65023B trades charger-only optimization for system-level integration - making LT1510-5IGN#TRPBF optimal for dedicated, high-efficiency, analog-programmed Li-ion/NiMH charging where minimal component count and proven thermal performance in GN package are essential.
Availability
LT1510-5IGN#TRPBF is available at Aetrix Electronics and suitable for smartphone fast chargers, industrial handheld battery packs, medical portable monitors, and wireless headset charging docks requiring stable component supply and long-lifecycle support.
Supply support for LT1510-5IGN#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, analog-programmed switching battery chargers targeting portable electronics - emphasizing minimal external components, thermal robustness, and precision CV/CC regulation without microcontroller dependency.
FAQ
What is the maximum battery voltage supported by the LT1510-5IGN#TRPBF?
The LT1510-5IGN#TRPBF supports battery voltages from 2V to 20V, enabling use with single-cell Li-ion (4.2V), multi-cell NiMH (up to 5×1.2V = 6V), or custom configurations such as 3-cell LiFePO₄ (10.8V). The maximum VBAT with switch ON is VCC – 2V, so proper input-to-battery voltage margin must be maintained.
How does the LT1510-5IGN#TRPBF achieve 0.5% voltage reference accuracy?
The LT1510-5IGN#TRPBF achieves ±0.5% reference accuracy at 25°C through laser-trimmed internal resistors and matched transistor pairs in its bandgap reference circuit. This precision is retained over temperature (±1% from –40°C to 85°C) and line (±0.003V from 8V to 28V VCC), directly enabling compliant 4.2V Li-ion float voltage without external calibration.
Can the LT1510-5IGN#TRPBF charge NiMH batteries without external termination circuitry?
No - unlike Li-ion charging, NiMH and NiCd require external charge termination circuitry (e.g., dV/dt detection, temperature monitoring, or timer-based cutoff) because the LT1510-5IGN#TRPBF provides only constant-current/constant-voltage regulation. The datasheet explicitly states that NiCd/NiMH termination is not implemented internally and must be added externally.
What is the purpose of the fused corner pins on the LT1510-5IGN#TRPBF GN package?
The four fused corner pins (pins 1, 4, 8, 15) on the LT1510-5IGN#TRPBF GN package are internally connected to the die attach paddle to serve as thermal vias. They must be soldered to expanded copper lands on the PCB to achieve the specified θJA of 80°C/W and prevent junction temperature exceedance under 1.5A continuous operation.
How is charging current programmed on the LT1510-5IGN#TRPBF?
Charging current on the LT1510-5IGN#TRPBF is programmed by connecting a resistor (e.g., 3.28kΩ for 1.5A) between the PROG pin and ground. The device draws a precise 2.465V reference current through this resistor, generating IPROG = 2.465V / RPROG; IBAT = IPROG × 2000. A DAC can also sink current into PROG with ≤2.5V compliance.
LT1510-5IGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (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:
- 16-SSOP
LT1510-5IGN#TRPBF FAQ
1.How can I place an order for LT1510-5IGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1510-5IGN#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 LT1510-5IGN#TRPBF reliable?
The price and inventory of LT1510-5IGN#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1510-5IGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1510-5IGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1510-5IGN#TRPBF?
LT1510-5IGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1510-5IGN#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 LT1510-5IGN#TRPBF?
For technical support, including LT1510-5IGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1510-5IGN#TRPBF requirements.
6.How does Aetrix verify that LT1510-5IGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1510-5IGN#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 LT1510-5IGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1510-5IGN#TRPBF?
All LT1510-5IGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1510-5IGN#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 LT1510-5IGN#TRPBF part is unused and in its original packaging.
Return procedure for LT1510-5IGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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