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Analog Devices Inc. LT1513IR#TRPBF
- Part No.:
- LT1513IR#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LT1513IR#TRPBF.pdf
- Description:
- IC BAT CHG MULT-CHEM 1CL D2PAK-7
- Quantity:
- Payment:
- Shipping:
Inventory:2,776
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Product details
Overview
LT1513IR#TRPBF from Analog Devices (formerly Linear Technology) is a 500kHz current-mode switching regulator configured as a constant- or programmable-current/constant-voltage battery charger for SEPIC or flyback topologies. It delivers up to 2A charging current for single Li-ion cells, features 1% voltage accuracy, 100mV current sense threshold, and supports input voltages lower than battery voltage - enabling charging from USB, wall adapters, or low-voltage sources in portable medical and industrial battery systems.
For engineers reviewing the LT1513IR#TRPBF datasheet, LT1513IR#TRPBF pinout, LT1513IR#TRPBF application, or LT1513IR#TRPBF equivalent, key selection considerations include its ground-referenced current sensing, 3A internal switch, 40V switch breakdown voltage, thermal design with θJA = 30°C/W (R package), and compatibility with Li-ion, NiMH, and lead-acid chemistries.
Technical Context
The LT1513IR#TRPBF implements dual-loop current-mode control using two inverting error amplifier inputs: one for voltage feedback (FB pin, referenced to 1.245V internal bandgap) and one for current feedback (IFB pin, regulated at –100mV for LT1513 variant). Its 500kHz oscillator drives an adaptive antisaturation logic driver that minimizes switch turn-off time and dissipation.
Operation relies on VC pin voltage (1.0–1.9V range) to directly set peak switch current from 0A to 3.6A. The integrated 2.3V low-dropout regulator powers internal circuitry across 2.7V–25V input range, and the S/S pin provides simultaneous shutdown (12µA quiescent) and synchronization (600–800kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 500kHz typical; minimizes inductor size and enables compact SEPIC designs with ≤10µH magnetics. |
| Max Switch Current | 3.0A minimum guaranteed; supports ≥2A battery charging current with margin for transient loads. |
| FB Reference Voltage | 1.245V ±12mV; enables precise 4.1V or 4.2V Li-ion float voltage setting with <±0.5% error over temperature. |
| IFB Sense Voltage | –100mV ±7mV (LT1513); allows accurate ground-referenced current sensing without battery isolation components. |
| Supply Voltage Range | 2.7V to 25V input; supports wide-range DC sources including automotive, industrial, and adapter-derived supplies. |
| Switch Breakdown Voltage | 40V minimum; permits safe operation with VIN + VBAT ≤ 40V in SEPIC topology (e.g., 12V input + 8.4V battery). |
| Thermal Resistance | θJA = 30°C/W (with 0.5in² copper); requires direct TAB-to-ground-plane soldering for reliable 2A continuous operation. |
Pinout & Package
The LT1513IR#TRPBF uses a 7-lead plastic DD (R) package with exposed ground TAB. Thermal performance depends on low-inductance connection of both Pin 4 (GND) and the metal TAB to the same ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Error amplifier output / current limit control | Voltage sets peak switch current (0–3.6A); used for loop compensation, soft-start, and clamping to 1.9V max. |
| FB (Pin 2) | Voltage feedback input | Inverting input to voltage error amp; senses battery voltage via R1/R2 divider referenced to 1.245V internal reference. |
| IFB (Pin 3) | Current feedback input | Regulates at –100mV during CC mode; accepts filtered signal from ground-referenced sense resistor (e.g., R3 = 0.08Ω). |
| GND (Pin 4) | Power and signal ground | Common return for control circuitry, switch current, and all Kelvin-sensed signals; must be connected near TAB. |
| VSW (Pin 5) | Switch collector node | Carries up to 3A pulsed current; requires short, low-inductance PCB trace to minimize EMI and voltage spikes. |
| S/S (Pin 6) | Shutdown/synchronization input | Logic-compatible pin: low = micropower shutdown (12µA); 600–800kHz AC = frequency sync without shutdown. |
| VIN (Pin 7) | Main power supply input | Accepts 2.7–25V; must be bypassed with low-ESR capacitor placed adjacent to IC and ground plane. |
| TAB | Exposed ground pad | Electrically tied to Pin 4 (GND); mandatory low-inductance thermal path to PCB ground plane for thermal reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Ground-referenced current sensing | Enables direct battery grounding and eliminates need for high-side current sense amplifiers or isolated sense paths. |
| Input voltage flexibility | Charges batteries even when VIN < VBAT (e.g., 5V USB → 4.2V Li-ion), critical for universal-input portable chargers. |
| Integrated antisaturation driver | Reduces switch turn-off time and driver losses, improving efficiency and thermal performance at high duty cycles. |
| Low-quiescent shutdown | 12µA shutdown current prevents battery drain in standby, essential for long-term backup and medical devices. |
| Dual-function S/S pin | Eliminates need for separate sync and enable circuitry - simplifies BOM and layout while supporting deterministic timing. |
Applications
| Portable Medical Devices | Industrial Handheld Terminals |
|---|---|
Use Scenario: Rechargeable Li-ion battery pack in a portable ultrasound probe or glucose monitor requiring safe, field-upgradable charging from variable adapters. IC Role / Device Role / Timing Role: Constant-current/constant-voltage charger controller managing full charge cycle with 1% voltage accuracy and ground-referenced current monitoring. Use Value: Enables compliance with IEC 62368-1 safety requirements by eliminating floating sense nodes and supporting input voltages below battery voltage. | Use Scenario: Ruggedized barcode scanner with hot-swappable battery, powered from 12V vehicle supply or 5V USB-C port. IC Role / Device Role / Timing Role: SEPIC topology charger IC delivering stable 1.5A charge current regardless of input source (5V or 12V) and battery state (3.0–4.2V). Use Value: Eliminates need for multiple charger designs - single BOM supports diverse power inputs while maintaining CE/FCC EMI compliance via 500kHz fixed-frequency operation. |
| Lead-Acid Backup Systems | CCFL Backlight Drivers |
Use Scenario: 12V sealed lead-acid battery maintainer in telecom remote cabinet with wide-input 9–36V DC supply. IC Role / Device Role / Timing Role: Precision current-limited power supply regulating bulk charge at 1.5A and float voltage at 13.8V with temperature-compensated termination. Use Value: Achieves >92% efficiency at 12V input/13.8V output while avoiding diode reverse leakage discharge during off-state via SEPIC topology. | Use Scenario: High-efficiency CCFL inverter for industrial HMI display operating from 24V rail with grounded or floating lamp configuration. IC Role / Device Role / Timing Role: Royer converter driver with integrated 3A switch and adaptive antisaturation control for rapid lamp ignition and stable brightness regulation. Use Value: Reduces external component count by 40% vs discrete MOSFET+driver solutions while maintaining 500kHz timing stability under varying lamp load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4000IGN#PBF | Wider input range (2.7–36V), dual N-channel MOSFET gate drivers, no integrated switch; requires external FETs. | Supports higher-power multi-cell Li-ion and LiFePO4 packs; lacks ground-referenced IFB for simple current sensing. | Select LTC4000 when designing >3A chargers or needing programmable charge termination algorithms beyond CC/CV. |
| MAX1771CSA+ | Fixed 300kHz frequency, no integrated switch, 1.25V FB reference, no dedicated IFB pin - uses external op-amp for current loop. | Requires more external components for current sensing; limited to lower-accuracy NiCd/NiMH applications. | Select MAX1771 for cost-sensitive, non-Li-ion applications where 1% voltage accuracy and ground-referenced sensing are not required. |
Compared with LTC4000IGN#PBF and MAX1771CSA+, the LT1513IR#TRPBF offers integrated 3A switching, true ground-referenced current feedback, and seamless SEPIC operation - making it optimal for compact, single-cell Li-ion chargers where board space and sensing simplicity are critical.
Availability
LT1513IR#TRPBF is available at Aetrix Electronics and suitable for portable medical devices, industrial handheld terminals, lead-acid backup systems, and CCFL backlight drivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LT1513IR#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, serving precision instrumentation, industrial automation, and aerospace markets.
The LT1513IR#TRPBF belongs to Linear's legacy battery management IC portfolio, designed specifically for efficient, topology-flexible charging of rechargeable batteries in space-constrained and thermally demanding applications.
FAQ
What is the maximum battery voltage supported by the LT1513IR#TRPBF?
The LT1513IR#TRPBF supports battery voltages up to 20V, as confirmed in the Applications section of the datasheet. This allows charging configurations ranging from single-cell Li-ion (4.2V) to five-series NiMH (6V) or sealed lead-acid (12V), with the SEPIC topology ensuring safe operation even when input voltage is lower than battery voltage. The 40V switch breakdown rating further ensures robustness against transients in VIN + VBAT scenarios.
Can the LT1513IR#TRPBF be used with lithium iron phosphate (LiFePO₄) batteries?
Yes, the LT1513IR#TRPBF can be configured for LiFePO₄ batteries by adjusting the R1/R2 feedback divider to set a 3.6V float voltage per cell. Its 1% FB reference accuracy and programmable current limit (via R3) ensure precise CC/CV charging. However, users must verify thermal performance at higher ambient temperatures, as LiFePO₄ fast-charge currents may push the 3A switch limit closer to its derated boundary in the R package.
How does the LT1513IR#TRPBF handle input voltage dropout or brownout conditions?
The LT1513IR#TRPBF incorporates an internal 2.3V low-dropout regulator that maintains internal biasing down to VIN = 2.7V. Below this threshold, the device ceases switching but retains FB/IFB pin functionality. Its minimum input voltage spec (2.7V) and 500kHz oscillator stability across temperature ensure graceful degradation rather than latch-up - critical for battery-powered systems experiencing voltage sag during high-current draw.
Is the LT1513IR#TRPBF pin-compatible with the LT1513-2IR#TRPBF?
No, the LT1513IR#TRPBF and LT1513-2IR#TRPBF are not pin-compatible in function despite identical pinout. The LT1513-2 variant regulates IFB at 0mV (not –100mV) and removes internal IFB feedback resistors to enable external current programming - altering the current-sense amplifier topology. Swapping them requires redesign of the R3/R4/R5 network and verification of loop stability per Figure 5 in the datasheet.
What thermal derating applies to the LT1513IR#TRPBF at 85°C ambient?
At 85°C ambient, the LT1513IR#TRPBF's junction temperature must remain ≤125°C. With θJA = 30°C/W, maximum allowable power dissipation is (125 – 85)/30 = 1.33W. For a typical 1.2A/8.2V application, total dissipation is ~0.92W (per datasheet thermal calc), leaving ~0.4W margin. Layout improvements (larger copper area, airflow) can extend this margin, but exceeding 1.33W risks thermal shutdown or accelerated aging.
LT1513IR#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- -
- Charge Current - Max:
- 2A
- Battery Pack Voltage:
- 20V (Max)
- Voltage - Supply (Max):
- 25V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DDPAK-7
LT1513IR#TRPBF FAQ
1.How can I place an order for LT1513IR#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1513IR#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 LT1513IR#TRPBF reliable?
The price and inventory of LT1513IR#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1513IR#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1513IR#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1513IR#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1513IR#TRPBF?
LT1513IR#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1513IR#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 LT1513IR#TRPBF?
For technical support, including LT1513IR#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1513IR#TRPBF requirements.
6.How does Aetrix verify that LT1513IR#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1513IR#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 LT1513IR#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1513IR#TRPBF?
All LT1513IR#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1513IR#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 LT1513IR#TRPBF part is unused and in its original packaging.
Return procedure for LT1513IR#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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