My Inquiry
My Account
Analog Devices Inc. LT1513-2CR#TRPBF
- Part No.:
- LT1513-2CR#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LT1513-2CR#TRPBF.pdf
- Description:
- IC BAT CHG MULT-CHEM 1CL D2PAK-7
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1513-2CR#TRPBF from Analog Devices (formerly Linear Technology) is a 500kHz current-mode SEPIC battery charger IC optimized for constant-current/constant-voltage charging of Li-ion, NiCd, NiMH, and lead-acid batteries. It features ground-referenced 0mV current sense (LT1513-2 variant), 1% voltage regulation accuracy, 3A internal switch, and operation with input voltage below, equal to, or above battery voltage - enabling single-cell to 5-cell Li-ion (≤20V) charging in portable medical, industrial backup, and ruggedized power tools.
For engineers reviewing the LT1513-2CR#TRPBF datasheet, LT1513-2CR#TRPBF pinout, LT1513-2CR#TRPBF application, or LT1513-2CR#TRPBF equivalent, key selection criteria include its 0mV IFB reference for external current programming, 40V switch breakdown rating, thermal-limited 3A switch current, 500kHz fixed-frequency operation, and R-package 7-lead DD layout compatibility with high-power dissipation requirements.
Technical Context
The LT1513-2CR#TRPBF implements dual-loop current-mode control: the FB pin regulates output voltage via a 1.245V internal reference, while the IFB pin serves as a virtual ground (0mV regulated) for precise external current programming via resistor networks or PWM-derived DC signals. Its architecture separates current sensing from battery grounding, eliminating floating-sense complications.
Internally, it integrates a 500kHz oscillator, adaptive antisaturation driver, low-dropout 2.3V bias regulator, and transconductance error amplifier (1500 µmho typ). The VC pin provides direct access to the error amplifier output for loop compensation, soft-start, and current limiting - with peak switch current scaling linearly from 0A to 3.6A as VC rises from 1V to 1.9V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 500 kHz ±10% - enables compact magnetics (e.g., 10 µH coupled inductor) and reduces EMI filtering burden. |
| FB Reference Voltage | 1.245 V ±12 mV - sets precise float voltage for Li-ion (e.g., 4.2V/cell) via external resistor divider; 1% accuracy ensures safe full-charge termination. |
| IFB Regulation Voltage | 0 mV (LT1513-2 only) - allows direct Kelvin connection of external current-sense resistor; eliminates offset errors in programmable-CC mode. |
| Max Switch Current | 3.8 A (typ) - supports up to 2 A continuous battery charge current with margin for transient peaks and thermal derating. |
| Switch Breakdown Voltage | 40 V - permits SEPIC operation with VIN + VBAT ≤ 40 V (e.g., 12 V input + 8.4 V battery = 20.4 V stress). |
| Supply Current | 5.5 mA (typ) - low quiescent draw enables efficient light-load operation without compromising regulation fidelity. |
| Shutdown Current | 30 µA (typ) - minimizes battery drain during standby; compatible with host-controlled power gating. |
Pinout & Package
LT1513-2CR#TRPBF is housed in a thermally enhanced 7-lead plastic DD (R) package with exposed ground tab. The TAB is electrically connected to Pin 4 (GND) and must be soldered to ≥0.5 in² copper area for θJA = 30°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Error amplifier output / compensation node | Direct access to EA output; used for frequency compensation (RC to GND), soft-start (capacitor ramp), and current limit setting (voltage-to-current mapping). |
| FB (Pin 2) | Voltage feedback input | Inverting input of voltage error amplifier; referenced to 1.245 V internal bandgap; requires 100 µA divider current to swamp 300 nA input bias. |
| IFB (Pin 3) | Current feedback input (0 mV regulated) | Virtual ground for external current programming; accepts DC or filtered PWM signal; enables precise CC setpoint via R4/R5 ratio per Figure 5. |
| GND (Pin 4) | Power and signal ground reference | Common return for control circuitry, switch emitter, and TAB; all Kelvin connections (VC, FB, S/S) must tie directly here. |
| VSW (Pin 5) | Internal switch collector | Carries up to 3.8 A pulsed current; requires shortest possible PCB trace to minimize ringing and EMI; connects to coupled inductor L1B and catch diode anode. |
| S/S (Pin 6) | Shutdown/synchronization input | Logic-compatible dual-function pin: <0.6 V = shutdown (30 µA IQ); 600–800 kHz AC = synchronization (avoids duty-cycle jitter). |
| VIN (Pin 7) | Main supply input | Accepts 2.7–30 V; requires local low-ESR capacitor (e.g., 22 µF tantalum) tied directly to GND pin and TAB for stable biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Ground-referenced current sense | IFB pin regulated at 0 mV (LT1513-2) enables direct Kelvin connection of Rsense, eliminating floating-sense amplifiers and common-mode rejection issues. |
| SEPIC topology support | Allows charging when input voltage is lower than battery voltage (e.g., 5 V USB to 8.4 V 2S Li-ion), with no reverse discharge path and inherent isolation between input and battery grounds. |
| Programmable constant-current | Charging current set by external resistor network (R4/R5) or PWM-derived DC voltage; linearity maintained across 0–100% range with <±62 mA error at 1 A full scale. |
| Integrated 2.3 V bias regulator | Enables operation down to 2.7 V input; powers all internal circuitry including oscillator, comparators, and drivers without external LDO dependency. |
| Adaptive antisaturation driver | Dynamically adjusts gate drive to minimize switch saturation time and conduction loss; improves efficiency and reduces thermal stress on internal NPN transistor. |
Applications
| Portable Medical Defibrillator Backup | Industrial 24 VDC UPS Module |
|---|---|
Use Scenario: Maintaining sealed lead-acid (SLA) backup battery at full charge during AC mains operation, then delivering regulated 2.3 A discharge current during outage. IC Role / Device Role / Timing Role: Constant-voltage/constant-current charger managing SLA absorption and float stages; uses FB for 27.6 V float regulation and IFB for 2.3 A bulk charge current control. Use Value: Eliminates need for discrete op-amps and MOSFETs in CC/CV stage; 1% voltage accuracy prevents overcharge degradation; 0 mV IFB simplifies current-set resistor calibration. | Use Scenario: Charging dual-series Li-ion (8.4 V) battery from variable 9–18 V vehicle supply in mobile data acquisition systems. IC Role / Device Role / Timing Role: SEPIC charger IC providing input-to-battery isolation, wide VIN support, and seamless transition between CC (1.5 A) and CV (8.4 V) phases. Use Value: Enables charging even when engine-off voltage drops to 9 V; ground-referenced IFB avoids level-shifting circuits; 500 kHz switching allows use of miniature 10 µH coupled inductors. |
| Ruggedized Power Tool Battery Pack | Field-Deployable Test Equipment Charger |
Use Scenario: Fast-charging 3S Li-ion (12.6 V) packs from 15 V wall adapter in cordless drills, with thermal foldback and robust ESD protection. IC Role / Device Role / Timing Role: High-current battery charger IC driving SEPIC power stage; uses VC pin for thermal compensation and S/S pin for microcontroller-initiated shutdown. Use Value: 3.8 A switch rating supports 2 A continuous charge with headroom; R-package TAB enables direct heatsinking; 40 V switch rating tolerates 15 V input + 12.6 V battery = 27.6 V stress. | Use Scenario: Universal bench charger supporting NiMH (1.45 V/cell), Li-ion (4.2 V/cell), and lead-acid (2.3 V/cell) chemistries via front-panel voltage/current selection. IC Role / Device Role / Timing Role: Programmable CC/CV charger IC accepting analog voltage commands for ICHRG and digital I²C for VFLOAT; IFB pin used as precision 0 mV reference for DAC-driven current setpoint. Use Value: Single-IC solution replaces multi-chip discrete designs; 0 mV IFB enables <1% current programming accuracy; FB reference stability ensures <±10 mV voltage setpoint drift over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current/constant-voltage battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4000-1 | External MOSFET controller (no integrated switch); supports higher voltages (up to 32 V battery), but requires external power stage and more complex loop compensation. | Used in high-power (>3 A) or high-voltage (>20 V) applications where thermal management favors discrete FETs. | Select LTC4000-1 when >2 A charge current, >20 V battery, or active thermal monitoring is required - not a drop-in replacement for LT1513-2CR#TRPBF. |
| BQ24610 | Integrated 3.5 A switch; fixed 4.2 V Li-ion float; lacks 0 mV IFB - uses 100 mV current sense threshold and internal current amplifier. | Targeted at cost-sensitive consumer Li-ion chargers; no support for NiMH/lead-acid or programmable CC via external voltage. | Choose BQ24610 only for fixed-voltage, single-chemistry Li-ion applications where 0 mV current sense and multi-chemistry flexibility are not needed. |
Compared with LTC4000-1 and BQ24610, the LT1513-2CR#TRPBF uniquely combines integrated 3.8 A switching, 0 mV ground-referenced current sense for external programming, and seamless SEPIC operation across input voltages below or above battery voltage - making it optimal for rugged, multi-chemistry, and space-constrained industrial battery systems.
Availability
LT1513-2CR#TRPBF is available at Aetrix Electronics and suitable for portable medical devices, industrial UPS modules, ruggedized power tools, and field-deployable test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LT1513-2CR#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT1513-2CR#TRPBF belongs to ADI's legacy Linear Technology battery management portfolio, designed specifically for high-efficiency, topology-flexible, multi-chemistry battery charging in harsh environments where reliability, precision, and thermal resilience are critical.
FAQ
What is the primary function of the IFB pin on the LT1513-2CR#TRPBF?
The IFB pin on the LT1513-2CR#TRPBF is a ground-referenced current feedback input regulated at 0 mV, enabling precise external programming of constant-charge current using resistor dividers or filtered PWM signals. Unlike the LT1513 (–100 mV IFB), the LT1513-2CR#TRPBF's 0 mV reference eliminates offset-related errors and simplifies Kelvin sensing - a core differentiator for accurate multi-chemistry battery charging.
Can the LT1513-2CR#TRPBF charge batteries with input voltage lower than battery voltage?
Yes, the LT1513-2CR#TRPBF supports SEPIC topology operation, allowing charging when input voltage is lower than, equal to, or higher than battery voltage - e.g., 5 V USB input charging an 8.4 V 2S Li-ion pack. This capability stems from the SEPIC's ability to boost or buck, enabled by the coupled inductor and coupling capacitor, and is explicitly validated in the LT1513-2CR#TRPBF's application circuits and absolute maximum ratings.
What is the maximum battery voltage supported by the LT1513-2CR#TRPBF?
The LT1513-2CR#TRPBF supports battery voltages up to 20 V, as confirmed in its "Charges Any Number of Cells Up to 20V" feature list and typical application schematics targeting 4S Li-ion (16.8 V) and 5S configurations. This limit is enforced by internal error amplifier headroom and external resistor-divider design constraints - exceeding 20 V risks inaccurate CV regulation and potential instability in the voltage loop.
How does the LT1513-2CR#TRPBF handle thermal management in high-current applications?
The LT1513-2CR#TRPBF uses its exposed TAB (connected to Pin 4/GND) for thermal conduction, achieving θJA = 30°C/W when soldered to ≥0.5 in² copper area. Its internal 2.3 V bias regulator and adaptive antisaturation driver reduce die heating, while the VC pin allows integration of thermal foldback circuits. Full 2 A charging is viable with proper PCB layout per Figure 4 - confirming that thermal design is integral to the LT1513-2CR#TRPBF's specification, not an afterthought.
Is the LT1513-2CR#TRPBF pin-compatible with other variants in the LT1513 family?
Yes, the LT1513-2CR#TRPBF shares identical 7-lead R-package pinout and footprint with LT1513CR, LT1513IR, and LT1513-2IR - all variants use the same VC/FB/IFB/GND/VSW/S/S/VIN arrangement. However, functional differences exist: LT1513-2CR#TRPBF has 0 mV IFB regulation and no internal IFB feedback resistors, whereas LT1513CR uses –100 mV IFB and internal gain-setting resistors - requiring schematic changes for interchangeability.
LT1513-2CR#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:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DDPAK-7
LT1513-2CR#TRPBF FAQ
1.How can I place an order for LT1513-2CR#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1513-2CR#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 LT1513-2CR#TRPBF reliable?
The price and inventory of LT1513-2CR#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1513-2CR#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1513-2CR#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1513-2CR#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1513-2CR#TRPBF?
LT1513-2CR#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1513-2CR#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 LT1513-2CR#TRPBF?
For technical support, including LT1513-2CR#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1513-2CR#TRPBF requirements.
6.How does Aetrix verify that LT1513-2CR#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1513-2CR#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 LT1513-2CR#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1513-2CR#TRPBF?
All LT1513-2CR#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1513-2CR#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 LT1513-2CR#TRPBF part is unused and in its original packaging.
Return procedure for LT1513-2CR#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1513-2CR#TRPBF Tags
-
BQ21040DBVR
Texas Instruments
-
MCP73812T-420I/OT
Microchip Technology
-
MCP73831T-2ACI/OT
Microchip Technology
-
MCP73832T-2ACI/OT
Microchip Technology
-
MCP73831T-2DCI/OT
Microchip Technology
-
MCP73832T-2DCI/OT
Microchip Technology
-
MCP73831T-2ATI/OT
Microchip Technology
-
MCP73832T-2ATI/OT
Microchip Technology
-
MCP73831T-5ACI/OT
Microchip Technology
-
MCP73832T-2ACI/MC
Microchip Technology
-
MCP73831T-2ACI/MC
Microchip Technology
-
MCP73831T-2ATI/MC
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
