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Analog Devices Inc. LT1510IGN#PBF
- Part No.:
- LT1510IGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT1510IGN#PBF.pdf
- Description:
- IC BATT CHG MULTI-CHEM 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,712
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Product details
Overview
LT1510IGN#PBF from Analog Devices (formerly Linear Technology) is a constant-voltage/constant-current switching battery charger IC designed for lithium-ion, NiCd, and NiMH batteries. It integrates a 1.5A DC / 2A peak internal NPN switch, 0.1Ω onboard current-sense resistor, and precision 0.5% reference voltage. It operates from 8V–28V input, charges batteries from 2V–20V, and delivers >87% efficiency at 1.3A in Li-ion applications.
For engineers reviewing the LT1510IGN#PBF datasheet, LT1510IGN#PBF pinout, LT1510IGN#PBF application, or LT1510IGN#PBF equivalent, key selection considerations include its 200kHz switching frequency, thermal resistance of 80°C/W in GN package, ±1% OVP accuracy over temperature, soft-start via VC pin capacitor, and shutdown control through VC pin logic level.
Technical Context
The LT1510IGN#PBF implements current-mode PWM buck topology with internal NPN switch and integrated current-sense amplifier (CA1). Its PROG pin accepts either a resistor or DAC-sourced programming current (500µA/A scaling), enabling precise 1.5A charging current set within ±3% typical accuracy. The OVP pin connects to a dedicated voltage amplifier (VA) referenced to the 2.465V internal bandgap, allowing programmable float voltage for Li-ion cells.
It features ground-referenced current sensing (SENSE and BAT pins), reverse-battery drain current of only 3µA when VCC is unpowered, and undervoltage lockout at 7V on VCC. The BOOST pin drives the internal switch into saturation, reducing conduction loss, while the VC pin serves dual roles: inner-loop control voltage (0.7V–1.1V for soft-start ramp) and active-low shutdown input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 200 kHz - enables compact magnetics (e.g., 33 µH inductor) and reduces EMI filtering burden |
| Max Charging Current | 1.5 A DC - supported by internal 0.5 Ω ON-resistance switch and thermal design (θJA = 80°C/W) |
| Reference Voltage Accuracy | ±0.5% at 25°C - ensures Li-ion float voltage stability within ±21 mV of 4.2 V target |
| Current Sense Resistor | 0.1 Ω integrated - eliminates external sense resistor, simplifies layout, and improves accuracy |
| OVP Input Bias Current | 50 nA - allows high-impedance resistor dividers (e.g., 100 kΩ + 240 kΩ) without significant error |
| Shutdown Quiescent Current | 3 µA - enables low-power sleep mode when wall adapter is disconnected |
| Operating Temp Range | –40°C to +85°C - qualified for industrial ambient conditions per LT1510IGN grade |
Pinout & Package
The LT1510IGN#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 (θJA = 80°C/W). PCB land pattern must expand these four corner pads for effective heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4, 15, 16) | Power and signal ground reference | Fused corner pins connect directly to thermal paddle; all must be soldered to large copper pour for thermal management |
| SW (Pin 2) | Switch node output | Drives external Schottky catch diode; requires minimal trace length to GND to minimize ringing and EMI |
| BOOST (Pin 3) | Bootstrap drive for internal NPN switch | Voltage = VCC + VBAT during switch ON; max rating 55 V - dictates external diode/capacitor voltage rating |
| SENSE (Pin 5) | Inverting input of current-sense amplifier CA1 | Connected across internal 0.08 Ω RS1; enables high-side or low-side current sensing configuration |
| VCC (Pins 6, 11, 12) | IC supply input | Must be ≥2 V above VBAT (≤10 V) or ≥2.5 V above VBAT (>10 V); bypassed with ≥10 µF low-ESR capacitor |
| PROG (Pin 7) | Charging current programming input | Sinks 500 µA per amp of IBAT; voltage clamped near 2.465 V - compatible with DAC current output |
| VC (Pin 8) | Current-mode PWM control and shutdown | Ramps 0.7–1.1 V for soft-start; pulled low (<0.8 V) to disable switching; sources/sinks up to 3 mA |
| BAT (Pin 9) | Non-inverting input of CA1 | Completes current-sense path with SENSE; also used as battery voltage reference point for OVP divider |
| OVP (Pin 10) | Voltage feedback input for constant-voltage regulation | Compares divided battery voltage against 2.465 V reference; bias current ≤150 nA enables high-Z dividers |
| NC (Pins 13, 14) | No-connect | Not internally bonded - must remain unconnected and un-routed on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5A switch with 0.5Ω RON | Eliminates external MOSFET and gate driver, reducing BOM count and board area in portable chargers |
| 0.1Ω onboard current-sense resistor | Removes need for precision external shunt, avoids layout sensitivity, and improves production yield |
| 0.5% reference voltage accuracy | Meets stringent Li-ion float voltage tolerance (±21 mV @ 4.2 V), reducing risk of overcharge and cell degradation |
| 3µA sleep-mode current | Prevents battery discharge when AC adapter is unplugged - critical for long-term storage in backup systems |
| Programmable soft-start via VC pin | 0.1 µF capacitor sets ~3 ms ramp time to full charge current, preventing inrush stress on input capacitors and battery |
| Ground-referenced current sensing | Allows direct connection of battery negative to system ground - simplifies thermal and safety isolation in multi-cell packs |
Applications
| Lithium-Ion Cell Phone Charger | Industrial Portable Equipment Charger |
|---|---|
Use Scenario: Compact 500kHz Li-ion charger for single-cell smartphones using ceramic inductors and minimal footprint. IC Role / Device Role / Timing Role: Constant-current/constant-voltage buck controller with integrated switch and precision OVP loop. Use Value: Achieves >87% efficiency at 1.3A with 10 µH inductor height <2.2 mm, enabling ultra-thin form factor without external sense resistor or compensation components. | Use Scenario: Ruggedized battery charger for handheld test instruments operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Industrial-grade battery management IC providing programmable CC/CV charge profile and thermal-aware current limiting. Use Value: GN package's fused thermal pads and extended temperature qualification ensure reliable operation under sustained load in sealed enclosures with limited airflow. |
| NiMH/NiCd Power Tool Charger | Medical Portable Device Charger |
Use Scenario: Dual-level fast/trickle charger for cordless power tools with automatic transition based on battery voltage. IC Role / Device Role / Timing Role: Programmable current-mode PWM regulator with external OVP and VC-controlled shutdown for staged charging. Use Value: Enables 0.5A fast charge and 50mA maintenance charge using single IC and resistor-programmed PROG pin, eliminating discrete comparator circuits. | Use Scenario: Low-noise, low-leakage charger for implanted or wearable medical devices requiring zero reverse battery drain. IC Role / Device Role / Timing Role: Precision battery charger with 3µA sleep current and <0.4V VC shutdown threshold to prevent parasitic battery loading. Use Value: Prevents unintended battery discharge during standby - critical for life-critical devices where battery longevity directly impacts patient safety. |
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), higher accuracy (0.25% ref), but requires external MOSFETs and sense resistor | Supports multi-cell Li-ion and lead-acid; not drop-in - needs redesign of power stage and feedback network | Choose LTC4000IGN#PBF when designing for >20V input or needing tighter voltage regulation than LT1510IGN#PBF provides |
| MAX1555EUT+T | USB-powered (5V only), fixed 500mA charge current, no PROG pin flexibility, smaller 6-pin SOT23 package | Targeted exclusively at USB-charged single-cell Li-ion; lacks adjustable OVP and industrial temp range | Choose MAX1555EUT+T only for cost-sensitive, USB-only consumer devices where programmability and temperature range are secondary |
Compared with LTC4000IGN#PBF and MAX1555EUT+T, the LT1510IGN#PBF uniquely balances integration (internal switch + sense resistor), precision (0.5% ref), and industrial qualification in a thermally optimized SSOP package - making it optimal for standalone AC/DC adapter-based chargers requiring reliability and moderate design flexibility.
Availability
LT1510IGN#PBF is available at Aetrix Electronics and suitable for industrial portable equipment, medical battery backup systems, and professional power tool chargers requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature performance.
Supply support for LT1510IGN#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 LT1510IGN#PBF belongs to ADI's legacy Linear Technology battery management product line, engineered specifically for highly integrated, efficient, and thermally robust constant-current/constant-voltage charging of rechargeable chemistries in space-constrained industrial and portable applications.
FAQ
What is the maximum battery voltage supported by the LT1510IGN#PBF?
The LT1510IGN#PBF supports battery voltages from 2V to 20V. Its internal architecture allows the BAT pin to tolerate up to VCC – 2V when the switch is ON, and the OVP amplifier is designed to accurately regulate up to 20V battery systems using appropriate resistor dividers. This makes the LT1510IGN#PBF suitable for single- to five-cell Li-ion, multi-cell NiMH, and other medium-voltage rechargeable configurations.
How does the LT1510IGN#PBF achieve constant-voltage regulation for lithium-ion batteries?
The LT1510IGN#PBF achieves constant-voltage regulation using its internal 2.465V precision reference and dedicated OVP pin. A resistor divider from the battery to ground feeds a scaled-down version of VBAT into the OVP pin. When this voltage reaches 2.465V, the internal voltage amplifier (VA) reduces the charging current by modulating the PWM duty cycle - transitioning smoothly from constant-current to constant-voltage mode without external circuitry. This behavior is intrinsic to the LT1510IGN#PBF's analog control architecture.
Can the LT1510IGN#PBF be used without an external Schottky diode?
No - the LT1510IGN#PBF requires an external Schottky catch diode connected between the SW pin and GND. Although the IC enters sleep mode and draws only 3µA when VCC is removed, it does not integrate a synchronous rectifier or body-diode replacement. The datasheet explicitly specifies placement of "Schottky catch diode with very short lead length in close proximity to SW pin and GND" to minimize losses and ringing. Omitting the diode will cause catastrophic failure during switch OFF transitions.
What is the purpose of the BOOST pin on the LT1510IGN#PBF, and what voltage can it handle?
The BOOST pin on the LT1510IGN#PBF supplies gate drive voltage to the internal NPN switch, forcing it into deep saturation to minimize conduction loss. During switch ON, BOOST voltage equals VCC + VBAT, so its absolute maximum rating is 55V. Designers must select an external BOOST capacitor and diode rated for this combined voltage - for example, with VCC = 24V and VBAT = 12V, BOOST must withstand ≥36V. Exceeding 55V risks permanent damage to the LT1510IGN#PBF's internal driver stage.
Does the LT1510IGN#PBF require external compensation components?
The LT1510IGN#PBF integrates internal compensation for its current-mode PWM loop, requiring only a 0.1µF capacitor on the VC pin for soft-start timing - no external Type II or III compensation network is needed. However, the PROG pin does require a 0.47µF capacitor (CPROG) to average the AC-coupled current signal from the CA1 amplifier, as specified in the block diagram and test circuits. This CPROG capacitor is mandatory for stable current regulation and is part of the LT1510IGN#PBF's defined application circuit.
LT1510IGN#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
LT1510IGN#PBF FAQ
1.How can I place an order for LT1510IGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1510IGN#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 LT1510IGN#PBF reliable?
The price and inventory of LT1510IGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1510IGN#PBF is usually 5 days.
3.What payment methods are accepted for LT1510IGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1510IGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1510IGN#PBF?
LT1510IGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1510IGN#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 LT1510IGN#PBF?
For technical support, including LT1510IGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1510IGN#PBF requirements.
6.How does Aetrix verify that LT1510IGN#PBF is sourced from the original manufacturer or authorized distributors?
All LT1510IGN#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 LT1510IGN#PBF meets industry standards.
7.What is the process for return or replacement of LT1510IGN#PBF?
All LT1510IGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1510IGN#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 LT1510IGN#PBF part is unused and in its original packaging.
Return procedure for LT1510IGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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