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Analog Devices Inc. LTC3110IFE#TRPBF
- Part No.:
- LTC3110IFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3110IFE#TRPBF.pdf
- Description:
- IC BATT CHG SUPERCAP 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,791
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Product details
Overview
LTC3110IFE#TRPBF from Analog Devices is a 2A bidirectional buck-boost DC/DC regulator and supercapacitor/battery charger-balancer. It operates across 0.1V–5.5V VCAP and 1.8V–5.25V VSYS ranges, features ±1% backup voltage accuracy, 1.2MHz fixed switching frequency, and autonomous charge-to-backup switchover-enabling reliable power backup in RAID systems and RF infrastructure.
For engineers reviewing the LTC3110IFE#TRPBF datasheet, LTC3110IFE#TRPBF pinout, LTC3110IFE#TRPBF application, or LTC3110IFE#TRPBF equivalent, key selection criteria include bidirectional current capability (2A), programmable ±2% charge current limit (125mA–2A), integrated VMID balancing buffer, Burst Mode quiescent current (40µA), and TSSOP-24 thermal performance (θJA = 33°C/W).
Technical Context
The LTC3110IFE#TRPBF implements a proprietary four-switch buck-boost topology with independent control of SW1 (switches A/B) and SW2 (switches C/D), enabling seamless voltage regulation when VCAP is above, below, or equal to VSYS without inductor current discontinuity. Its direction logic is governed by DIR pin hysteresis (1.045V/1.095V thresholds), while MODE pin selects between fixed-frequency PWM (low-noise, high-current) and Burst Mode (ultra-low IQ).
Charge termination uses FBVCAP feedback with rising/falling thresholds (1.095V/1.061V) and overcharge detection (1.125V–1.175V); VMID actively balances series supercapacitors by regulating mid-voltage to 50% of VCAP with ±300mA balancing current capability. Shutdown current is 0.05–1µA with RUN pin control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Current | 2A continuous bidirectional current supports high-power backup and fast charging of 10F supercaps. |
| VCAP Range | 0.1V to 5.5V enables single-cell Li-ion, multi-cell supercaps, or low-voltage battery backup. |
| VSYS Range | 1.8V to 5.25V matches standard logic rails (1.8V, 2.5V, 3.3V, 5V) for seamless system integration. |
| Backup Voltage Accuracy | ±1% ensures stable system rail during brownouts without external calibration. |
| Switching Frequency | Fixed 1.2MHz (typ) enables compact magnetics and predictable EMI filtering. |
| Burst Mode IQ | 40µA quiescent current extends hold-up time in low-power backup standby. |
| Shutdown Current | 0.05–1µA minimizes leakage drain on backup capacitors during long-term storage. |
Pinout & Package
Package: 24-lead plastic TSSOP (FE), thermally enhanced with exposed PGND pad (Pin 25). θJA = 33°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CAPOK (1) | VCAP OK indicator | Open-drain output pulled low when FBVCAP < 1.061V; signals valid capacitor voltage for system readiness. |
| CMPOUT (2) | Comparator output | Open-drain signal tied to µC interrupt; asserts low when CMPIN > 0.65V for custom supervision. |
| MODE (3) | Operation mode select | High = fixed-frequency PWM (low noise); Low = Burst Mode (40µA IQ); no effect in charge mode. |
| CMPIN (4) | Comparator input | Hysteresis (0.59V/0.65V) enables robust voltage monitoring with optional RC filter for noise immunity. |
| FBVCAP (5) | End-of-charge feedback | Programs 1.1V–5.5V charge threshold with hysteresis; triggers foldback at 95% threshold. |
| DIR (7) | Direction control | Hysteresis (1.045V/1.095V) prevents chatter during power-fail transitions; enables µC or resistor-divider control. |
| PROG (10) | Charge current set | Resistor to SGND programs ICHRG from 125mA to 2A with ±2% accuracy (RPROG = 1.5kΩ–24.3kΩ). |
| VMID (24) | Capacitor balancing output | Active linear buffer regulates mid-point of series supercaps to 50% VCAP; ±300mA drive capability. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous charge-to-backup switchover | Enables zero-intervention failover in server/RAID systems during AC loss without µC intervention. |
| Integrated VMID balancing buffer | Eliminates need for external balancing resistors or ICs in 2× supercap stacks, reducing BOM count and leakage. |
| Programmable ±2% charge current limit | Allows precise thermal and efficiency optimization across varying input sources (12V bus, PoE, USB-C PD). |
| ±1% backup voltage accuracy | Meets tight regulation requirements for FPGA configuration rails and memory retention without post-regulation LDOs. |
| 1.2MHz fixed switching frequency | Supports use of small 2.2µH inductors and ceramic output caps, minimizing solution footprint in space-constrained modules. |
Applications
| Server Backup Power | RAID Controller Hold-Up |
|---|---|
Use Scenario: Maintains NVRAM and cache integrity during unexpected AC power loss in dual-socket servers. IC Role / Device Role / Timing Role: Bidirectional buck-boost regulator charges 10F supercap stack from 12V bus and delivers regulated 3.3V to memory subsystem during outage. Use Value: Achieves >10s hold-up time at 2A load with ±1% VSYS accuracy, eliminating data corruption risk during graceful shutdown. | Use Scenario: Powers RAID controller ASIC and flash cache during disk spin-down after host-initiated shutdown. IC Role / Device Role / Timing Role: Charger-balancer manages two 5F supercaps in series; VMID pin actively equalizes voltages to prevent overvoltage failure. Use Value: Enables 100% duty-cycle balancing without external components, extending supercap lifetime beyond 10 years per JEDEC JESD22-A108. |
| RF Transceiver Battery Backup | Industrial PLC Real-Time Clock |
Use Scenario: Provides uninterrupted 2.5V supply to LTE/5G transceiver during primary battery swap or deep discharge. IC Role / Device Role / Timing Role: Operates in backup mode from 3.6V Li-ion cell; switches to charge mode when external 5V USB source is connected. Use Value: Seamless bidirectional transition (<200µs) prevents radio link drop; 40µA Burst Mode IQ extends standby to >6 months. | Use Scenario: Maintains RTC, SRAM, and watchdog timer during main 24VDC supply interruption in factory automation. IC Role / Device Role / Timing Role: Regulates 3.3V from 2.7–5.5V supercap bank; DIR pin driven by PLC supervisor IC for automatic mode switching. Use Value: ±1% voltage accuracy ensures RTC drift <1ppm; 0.05µA shutdown current enables >5-year capacitor hold-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX77827AEWI+T | Single-direction (buck-only) charger + boost backup; no VMID balancer; 1.5A max current. | Requires external balancing circuitry for supercap stacks; limited to lower-current backup loads. | Select when cost sensitivity outweighs balancing requirement and peak load ≤1.5A. |
| BQ24650RGER | Dedicated battery charger IC (no backup regulation); no bidirectional DC/DC; requires external boost converter for backup. | Suitable only for battery-charging-only systems; cannot regulate VSYS from VCAP without added components. | Choose only for pure charging applications where backup functionality is implemented separately. |
Compared with MAX77827AEWI+T and BQ24650RGER, the LTC3110IFE#TRPBF uniquely integrates bidirectional regulation, active capacitor balancing, and autonomous mode switching in one TSSOP-24 package-reducing total solution size by 40% and eliminating six external components versus discrete alternatives.
Availability
LTC3110IFE#TRPBF is available at Aetrix Electronics and suitable for server backup power, RAID controller hold-up, and RF transceiver battery backup requiring stable component supply across extended temperature (-40°C to +125°C) and long-life industrial deployments.
Supply support for LTC3110IFE#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and power management markets.
The LTC3110 product line delivers highly integrated, thermally optimized power management ICs for mission-critical backup applications-designed specifically for supercapacitor and battery-based hold-up in servers, storage, and wireless infrastructure.
FAQ
What is the maximum continuous bidirectional current supported by the LTC3110IFE#TRPBF?
The LTC3110IFE#TRPBF supports 2A continuous bidirectional current in both charge and backup modes. Peak current capability reaches 6A (typ) under transient conditions, verified per datasheet Figure 16 and Absolute Maximum Ratings. This enables full-power operation into 10F supercap banks and 3.3V/2A system rails without derating at 125°C junction temperature.
How does the VMID pin function in supercapacitor balancing for the LTC3110IFE#TRPBF?
The VMID pin on the LTC3110IFE#TRPBF is an active linear balancing buffer that regulates the midpoint voltage of two series-connected supercapacitors to exactly 50% of VCAP. It delivers ±300mA balancing current and suspends charging if VMID deviates beyond ±2.4V–2.62V (hysteresis window) when VCAP > 2.2V-preventing overvoltage failure without external components.
Can the LTC3110IFE#TRPBF operate with VCAP lower than VSYS in backup mode?
Yes, the LTC3110IFE#TRPBF operates seamlessly in backup mode when VCAP is as low as 0.1V-even below VSYS. Its four-switch buck-boost architecture maintains regulation down to 0.1V VCAP while delivering up to 2A at 1.8V–5.25V VSYS, as confirmed in Typical Application TA01a and Electrical Characteristics Table (VCAP No-Load Operating Range).
What is the quiescent current of the LTC3110IFE#TRPBF in Burst Mode operation?
The LTC3110IFE#TRPBF draws 40µA quiescent current in Burst Mode operation, measured as total supply current (IVCAP + IVSYS + ISVSYS) with VMODE = 0V. This value is guaranteed over –40°C to +125°C and enables >6-month standby from a 10F/3.3V supercap bank with minimal self-discharge impact.
Is the LTC3110IFE#TRPBF pin-compatible with other variants in the LTC3110 family?
Yes, the LTC3110IFE#TRPBF shares identical pinout and footprint with all FE-package variants (LTC3110EFE#TRPBF, LTC3110HFE#TRPBF) and is mechanically interchangeable. Electrical specifications differ only in temperature grade (I-grade = –40°C to +125°C), but all FE variants use the same 24-lead TSSOP package with exposed PGND pad and identical pin functions per datasheet Rev C.
LTC3110IFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Supercapacitor
- Number of Cells:
- -
- Current - Charging:
- -
- Programmable Features:
- -
- Fault Protection:
- Over Temperature, Over Voltage
- Charge Current - Max:
- -
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 5.5V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
LTC3110IFE#TRPBF FAQ
1.How can I place an order for LTC3110IFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3110IFE#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 LTC3110IFE#TRPBF reliable?
The price and inventory of LTC3110IFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3110IFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3110IFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3110IFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3110IFE#TRPBF?
LTC3110IFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3110IFE#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 LTC3110IFE#TRPBF?
For technical support, including LTC3110IFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3110IFE#TRPBF requirements.
6.How does Aetrix verify that LTC3110IFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3110IFE#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 LTC3110IFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3110IFE#TRPBF?
All LTC3110IFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3110IFE#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 LTC3110IFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3110IFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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