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Analog Devices Inc. LT1510IS8#PBF
- Part No.:
- LT1510IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1510IS8#PBF.pdf
- Description:
- IC BATT CHG MULTI-CHEM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
LT1510IS8#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, 0.5% precision voltage reference, 200kHz fixed-frequency current-mode PWM controller, and thermal shutdown protection. It operates from 8V to 28V input and charges batteries from 2V to 20V, supporting high-efficiency fast-charge applications in portable medical devices and industrial handhelds.
For engineers reviewing the LT1510IS8#PBF datasheet, LT1510IS8#PBF pinout, LT1510IS8#PBF application, or LT1510IS8#PBF equivalent, key selection criteria include its 8-pin SOIC package with fused ground pins for thermal management, ±1% OVP accuracy over temperature, 3µA sleep-mode quiescent current, programmable charging current via single resistor (±3% typical accuracy), and compatibility with external shutdown via VC pin.
Technical Context
The LT1510IS8#PBF implements a current-mode PWM buck topology with integrated NPN power switch and bootstrap-driven gate control on the BOOST pin. Its dual-loop architecture uses CA1 amplifier to convert sensed battery current into IPROG (500µA/A), then compares it against PROG-set reference to regulate IBAT; VA amplifier monitors battery voltage via OVP pin to enforce precise constant-voltage termination at 2.465V ±0.5%.
It features undervoltage lockout at 7V on VCC, soft-start controlled by 0.1µF capacitor on VC pin (full current reached in ~3ms), and reverse-battery drain limited to 3µA when VCC is disconnected. The 8-pin SOIC variant (S8 package) has θJA = 125°C/W and supports up to 1.3A thermally limited charging current at TA = 60°C with 16V battery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charging Current Accuracy | ±3% typical - enables single-resistor programming without calibration for production-grade Li-ion chargers. |
| Voltage Reference Accuracy | ±0.5% at 25°C, ±1% over –40°C to 85°C - meets Li-ion float voltage tolerance (±1–2%) without external trimming. |
| Switching Frequency | 200kHz fixed - balances efficiency (>87% at 1.3A) and inductor size (e.g., 33µH CTX33-2 for 0.5A NiMH). |
| Max DC Battery Current | 1.5A - sufficient for fast-charging single-cell Li-ion or multi-cell NiMH packs in space-constrained designs. |
| Sleep Mode Current | 3µA - eliminates battery drain when wall adapter is unplugged, critical for always-connected portable systems. |
| Input Voltage Range | 8V to 28V - supports common off-the-shelf AC/DC adapters (12V, 15V, 24V) without pre-regulation. |
| Operating Temp Range | –40°C to 85°C (Industrial grade) - qualified for extended-temperature industrial and automotive accessory applications. |
Pinout & Package
LT1510IS8#PBF is housed in an 8-pin plastic SOIC (S8) package with fused ground pins (Pins 1, 4, 5, 8) connected internally to the die attach paddle for enhanced thermal dissipation (θJA = 125°C/W). Pin 1 is SW (switch output), Pin 2 is BOOST, Pin 3 is GND, Pin 4 is SENSE, Pin 5 is VCC, Pin 6 is PROG, Pin 7 is VC, and Pin 8 is BAT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch Output | Drives external Schottky catch diode; requires short PCB trace to GND to minimize ringing and EMI. |
| BOOST | Bootstrap Driver | Supplies gate drive to internal NPN switch; VBOOST = VCC + VBAT during ON time; max 55V rating. |
| GND | Ground Reference | Pins 1, 4, 5, 8 are fused to thermal paddle - must connect all four to large copper pour for thermal reliability. |
| SENSE | Current Sense Input | Connects to low-side of 0.1Ω internal sense resistor; enables ground-referenced current sensing. |
| VCC | Supply Input | Accepts 8–28V; requires ≥10µF low-ESR capacitor; UVLO activates below 7V to halt switching. |
| PROG | Current Programming | Set charging current with resistor to GND; VPROG ≈ 2.465V; supports DAC current-sinking interface. |
| VC | Control Loop Input | Soft-start and shutdown control; 0.1µF to GND sets ramp rate; pull ≤0.8V to disable switching. |
| BAT | Battery Sense Input | High-side current sense node; used with SENSE to measure battery current without ground disruption. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5A Switch + 0.1Ω Sense Resistor | Eliminates external MOSFET and sense resistor, reducing BOM count and layout area in compact chargers. |
| 0.5% Precision Voltage Reference | Enables accurate 4.2V Li-ion CV termination without external voltage divider trimming resistors. |
| Current Sensing at Either Battery Terminal | Supports both high-side (BAT–SENSE) and low-side configurations - simplifies PCB routing in grounded-battery systems. |
| 3µA Sleep-Mode Drain | Preserves battery charge during standby - critical for emergency medical devices and remote sensors. |
| External Shutdown via VC Pin | Allows system-level power sequencing and battery removal detection using open-drain logic or microcontroller GPIO. |
Applications
| Portable Medical Monitors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Rechargeable Li-ion pack powers ECG monitor with continuous 24/7 operation and hot-swap capability. IC Role / Device Role / Timing Role: Constant-current/constant-voltage charger IC managing full-charge cycle and maintaining float voltage during standby. Use Value: ±1% OVP accuracy ensures cell voltage stays within 4.2V ±42mV, preventing overcharge degradation and extending battery life beyond 500 cycles. | Use Scenario: Ruggedized barcode scanner uses NiMH pack requiring 0.5A fast charge and automatic termination. IC Role / Device Role / Timing Role: Dual-mode battery charger IC delivering CC mode until ΔV/dt indicates full charge, then reducing to trickle. Use Value: Programmable PROG resistor sets exact 0.5A charge current (±3%), while 200kHz switching minimizes inductor height (<1.8mm) for thin form factor. |
| Emergency Lighting Systems | Wireless Sensor Nodes |
Use Scenario: LED-based exit sign with backup NiCd battery charged from 12V PoE-powered supply. IC Role / Device Role / Timing Role: High-efficiency step-down charger IC converting 12V input to regulated 1.2V/cell NiCd charge profile. Use Value: >90% efficiency at 0.5A reduces thermal stress in sealed enclosures; 3µA sleep current prevents battery depletion during 3-year standby. | Use Scenario: LoRaWAN environmental sensor node powered by Li-ion cell, recharged via solar-harvested 5–12V input. IC Role / Device Role / Timing Role: Wide-input battery charger IC accepting variable solar voltage and enforcing safe CC/CV Li-ion profile. Use Value: 8–28V input range accommodates unregulated solar panel output; UVLO at 7V prevents erratic behavior during low-light conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4000-1 | Requires external MOSFETs; supports higher voltage (up to 32V); includes SMBus interface and telemetry. | Used in server-grade battery management with host communication; not drop-in compatible. | Select LTC4000-1 only when telemetry, programmable safety timers, or >1.5A charge current are required. |
| BQ24610 | Fixed 350kHz frequency; integrated MOSFETs rated for 3A; no internal sense resistor - requires external 0.01Ω. | Targeted at high-current laptop and power tool chargers; lacks fused thermal pad in TSSOP package. | Choose BQ24610 for >1.5A applications where board space allows larger external sense resistor and higher thermal budget. |
Compared with LTC4000-1 and BQ24610, LT1510IS8#PBF offers the lowest component count for sub-1.5A Li-ion/NiMH charging, smallest footprint (8-pin SOIC), and lowest sleep current - making it optimal for cost-sensitive, space-constrained, and ultra-low-power portable designs.
Availability
LT1510IS8#PBF is available at Aetrix Electronics and suitable for portable medical monitors, industrial handheld scanners, emergency lighting systems, and wireless sensor nodes requiring stable component supply across long product lifecycles.
Supply support for LT1510IS8#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 acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for legacy Linear parts including the LT1510 family.
The LT1510 product line was designed specifically for highly integrated, efficient, and reliable battery charging in portable industrial and medical equipment - emphasizing minimal external components, precision voltage regulation, and robust thermal performance in compact packages.
FAQ
What is the maximum charging current supported by LT1510IS8#PBF under standard operating conditions?
The LT1510IS8#PBF supports up to 1.5A DC charging current with proper thermal design. In the 8-pin SOIC package (S8), thermally limited maximum current is 1.3A at TA = 60°C with 16V battery, per Figure G12 in the datasheet. This assumes adequate PCB copper area on fused ground pins and ambient airflow. Exceeding this limit risks junction temperature exceeding 125°C and triggering thermal shutdown.
Can LT1510IS8#PBF be used to charge lithium-ion batteries without external charge termination circuitry?
Yes, LT1510IS8#PBF can fully charge lithium-ion batteries without external termination circuitry. Its internal 2.465V ±0.5% reference and OVP amplifier automatically transition from constant-current to constant-voltage mode and taper current to zero when battery voltage reaches the programmed float level - as demonstrated in Figure 2 of the datasheet for 1.3A Li-ion charging.
How does the PROG pin function in LT1510IS8#PBF, and what resistor value sets 1A charging current?
The PROG pin on LT1510IS8#PBF accepts a resistor to ground to set charging current via IBAT = (2.465V / RPROG) × 2000. For 1A, RPROG = (2.465V × 2000) / 1A = 4.93kΩ. The datasheet confirms ±3% typical accuracy with this configuration, and the 0.1Ω internal sense resistor eliminates need for external current sensing.
What is the purpose of the fused ground pins in the LT1510IS8#PBF SOIC package?
The fused ground pins (1, 4, 5, 8) in LT1510IS8#PBF's 8-pin SOIC package are internally connected to the die attach paddle to provide low-thermal-resistance heat conduction to the PCB. Connecting all four pins to an expanded copper land significantly improves θJA (to 125°C/W), enabling higher sustained charging currents without exceeding 125°C junction temperature - essential for reliable operation in enclosed industrial devices.
Does LT1510IS8#PBF support NiCd and NiMH battery chemistries, and how is charge termination handled?
Yes, LT1510IS8#PBF supports NiCd and NiMH charging, but requires external charge termination circuitry as noted in the datasheet. Unlike Li-ion, NiCd/NiMH lack intrinsic voltage-based full-charge indicators; thus, termination relies on external methods such as –ΔV detection, temperature rise (dT/dt), or timer cutoff. Figure 6 shows a 2-level NiMH charger using external transistor Q1 controlled by system logic.
LT1510IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (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:
- 8-SO
LT1510IS8#PBF FAQ
1.How can I place an order for LT1510IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1510IS8#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 LT1510IS8#PBF reliable?
The price and inventory of LT1510IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1510IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1510IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1510IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1510IS8#PBF?
LT1510IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1510IS8#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 LT1510IS8#PBF?
For technical support, including LT1510IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1510IS8#PBF requirements.
6.How does Aetrix verify that LT1510IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1510IS8#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 LT1510IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1510IS8#PBF?
All LT1510IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1510IS8#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 LT1510IS8#PBF part is unused and in its original packaging.
Return procedure for LT1510IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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