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Analog Devices Inc. LTC3119HFE#TRPBF
- Part No.:
- LTC3119HFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3119HFE#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 5A 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,908
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Product details
Overview
LTC3119HFE#TRPBF from Analog Devices is a high-efficiency, 18V monolithic synchronous buck-boost DC/DC converter delivering up to 5A output current in buck mode (VIN > 6V), supporting 2.5V–18V input and 0.8V–18V output ranges, with programmable 400kHz–2MHz switching frequency and integrated maximum power point control (MPPC) for solar/battery backup applications.
For engineers reviewing the LTC3119HFE#TRPBF datasheet, LTC3119HFE#TRPBF pinout, LTC3119HFE#TRPBF application, or LTC3119HFE#TRPBF equivalent, key selection criteria include its –40°C to 150°C operating junction temperature, 28-lead enhanced TSSOP package with exposed PGND pad, seamless buck-boost transition, Burst Mode® operation (35µA no-load IQ), and MPPC functionality for photovoltaic or supercapacitor energy harvesting systems.
Technical Context
The LTC3119HFE#TRPBF implements a proprietary 4-switch PWM architecture enabling continuous regulation across VIN < VOUT, VIN = VOUT, and VIN > VOUT without mode-transition transients or subharmonics. Its current-mode control loop uses an internal error amplifier (795mV FB reference, 120µS transconductance) and soft-start (6ms duration) to ensure stable startup under wide input/output conditions.
It integrates dual bootstrap drivers (BST1/BST2), internal VCC LDO (3.7V ±150mV, 180mA limit), and precision RUN comparator (1.205V threshold, 90mV hysteresis) for accurate undervoltage lockout. The MPPC pin (798mV threshold) enables input voltage regulation from current-limited sources such as solar cells or backup capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 18V; supports unregulated battery stacks and supercapacitors; operates down to 250mV after startup when VCC is bootstrapped. |
| Output Voltage Range | 0.8V to 18V; set via external resistor divider on FB pin; 795mV ±18mV reference ensures tight regulation. |
| Continuous Output Current | 5A in buck mode (VIN > 6V); 3A at VIN = 3.6V/VOUT = 5V; limited by thermal design and 8A internal current sense threshold. |
| Switching Frequency | 400kHz to 2MHz; programmed via RT pin resistor or synchronized externally via PWM/SYNC pin up to 2MHz. |
| Quiescent Current | 35µA in Burst Mode® no-load operation; 3µA shutdown current; enables ultra-low-power standby in battery-powered systems. |
| Operating Junction Temp | –40°C to +150°C; validated for high-reliability industrial and automotive under-hood applications. |
| Power Switch RDS(ON) | 30mΩ per switch (PVIN→SW1, SW1→PGND, SW2→PGND, SW2→PVOUT); minimizes conduction loss and thermal rise at full load. |
Pinout & Package
The LTC3119HFE#TRPBF is housed in a 28-lead plastic enhanced TSSOP package (JEDEC MO-153) with exposed PGND pad (Pin 29) requiring soldering to PCB ground plane for thermal performance (θJA = 21°C/W). Pin numbering follows standard TSSOP top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pins 4,9,20,25,29) | Power Ground Reference | Low-impedance return path for all power switches; exposed pad must be soldered to PCB ground plane for thermal management and noise control. |
| VIN (Pin 19) | VCC Regulator Input | Supplies internal 3.7V LDO; requires local 4.7µF capacitor to GND; decouples control circuitry from input rail noise. |
| PVIN (Pins 22,23) | Main Input Power Rail | Connects to high-side switch A; requires ≥10µF low-ESR capacitor to PGND for transient current handling. |
| PVOUT (Pins 6,7) | Main Output Power Rail | Connects to low-side switch D; requires ≥10µF low-ESR capacitor to PGND for output ripple suppression. |
| SW1 (Pins 21,24) | Buck-Boost Inductor Node A | Connects to one end of power inductor; drives buck path (PVIN→SW1→PGND) and boost path (PVIN→SW1→SW2→PVOUT). |
| SW2 (Pins 5,8) | Buck-Boost Inductor Node B | Connects to other end of power inductor; completes boost path (SW2→PVOUT) and buck path (SW2→PGND). |
| BST1 (Pin 26) | SW1 Gate Drive Bootstrap | Must connect via 0.1µF ceramic capacitor to SW1; generates gate drive voltage above SW1 for N-channel high-side switch A. |
| BST2 (Pin 3) | SW2 Gate Drive Bootstrap | Must connect via 0.1µF ceramic capacitor to SW2; generates gate drive voltage above SW2 for N-channel high-side switch D. |
| FB (Pin 12) | Output Voltage Feedback | Resistor divider from PVOUT sets output; 795mV reference enables precise regulation across temperature and load. |
| MPPC (Pin 15) | Maximum Power Point Control | Resistive divider from PVIN to GND sets input regulation point (798mV threshold); disables MPPC when tied to VCC. |
| RUN (Pin 18) | Enable & UVLO Control | Logic enable input with 1.205V rising threshold; external resistor divider sets custom input UVLO with 90mV hysteresis. |
| PWM/SYNC (Pin 28) | Mode Control & Clock Sync | High = fixed-frequency PWM; low = Burst Mode®; external clock input synchronizes switching up to 2MHz. |
| PGOOD (Pin 10) | Power Good Indicator | Open-drain output asserts low when FB falls >8% below target; requires external pull-up for system monitoring. |
| VCC (Pin 16) | Internal Regulator Output | 3.7V ±150mV supply for control circuits; can source ≤10mA to external components; requires 4.7µF bypass capacitor. |
| VC (Pin 13) | Error Amplifier Output | Compensation node for feedback loop; connects to SGND via RC network to stabilize control bandwidth and phase margin. |
| RT (Pin 17) | Oscillator Frequency Set | Resistor to GND programs switching frequency from 400kHz to 2MHz; tolerance directly affects frequency accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| 4-Switch Synchronous Buck-Boost Topology | Enables seamless regulation across input-to-output voltage crossover without discontinuities or efficiency dips. |
| Burst Mode® Operation | Reduces no-load input current to 35µA while maintaining regulation-critical for long-duration battery backup systems. |
| Maximum Power Point Control (MPPC) | Regulates input voltage at optimal point for photovoltaic or supercapacitor sources, maximizing energy harvest efficiency. |
| Ultralow-Noise PWM Algorithm | Eliminates subharmonic oscillation and mode-transition spikes, reducing EMI filtering requirements in RF-sensitive designs. |
| Integrated VCC LDO with Bootstrapping Support | 3.7V regulator powers internal circuitry; allows operation down to 250mV VIN when VCC is bootstrapped from VOUT or auxiliary supply. |
| Thermally Enhanced TSSOP Package | 28-lead enhanced TSSOP with exposed PGND pad delivers θJA = 21°C/W-enabling 5A operation without forced air cooling. |
Applications
| Solar Battery Chargers | System Backup Power Supplies |
|---|---|
Use Scenario: Photovoltaic panel charging a 12V Li-ion battery bank in off-grid telemetry units with variable irradiance. IC Role / Device Role / Timing Role: Buck-boost controller with MPPC actively regulates panel voltage at peak power point while delivering regulated 12V output. Use Value: Increases harvested energy by >15% compared to fixed-input converters; supports cold-start from low-light conditions using 250mV VIN capability. | Use Scenario: Seamless switchover from main AC supply to supercapacitor backup during grid outages in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Wide-input buck-boost maintains 5V/3A output as supercapacitor discharges from 15V to 2.5V. Use Value: Eliminates need for separate boost and buck stages; 35µA Burst Mode® IQ extends backup runtime by >30% versus conventional solutions. |
| RF Power Supplies | 1- to 4-Cell Lithium Battery Powered Products |
Use Scenario: Low-noise 3.3V/2A supply for cellular IoT modem in asset tracking device with stringent conducted EMI limits. IC Role / Device Role / Timing Role: Ultralow-noise PWM mode delivers clean 3.3V rail; programmable 2MHz switching avoids sensitive RF bands. Use Value: Meets CISPR-22 Class B emissions without additional shielding; reduces board area vs discrete filter solutions. | Use Scenario: Portable medical monitor powered by 3.6V nominal Li-ion battery, requiring stable 5V/2A output across full discharge curve (4.2V → 2.8V). IC Role / Device Role / Timing Role: Buck-boost maintains 5V output while battery drops below 5V; RUN pin enables precise low-battery cutoff at 2.9V. Use Value: Extends usable battery capacity by 22% versus buck-only solution; 150°C rating supports sealed enclosure thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8390AEMSE#TRPBF | Higher 60V input rating, 4A output, spread-spectrum modulation; no MPPC; larger 16-lead MSOP package. | Targets 24V/48V industrial bus inputs, not low-voltage energy harvesting; lacks dedicated solar MPPT function. | Select when input exceeds 18V or spread-spectrum EMI reduction is mandatory; avoid if MPPC or 5A output is required. |
| TPS63060DSCR | Lower 5.5V max input, 3A output, fixed 2.5MHz switching; no MPPC, no programmable frequency, smaller 10-pin WSON package. | Optimized for compact consumer wearables with single-cell Li-ion; insufficient for 12V solar or 150°C environments. | Select for space-constrained, cost-sensitive single-cell apps; avoid for wide-input, high-temp, or solar applications. |
Compared with LT8390A and TPS63060, the LTC3119HFE#TRPBF uniquely combines 5A output, MPPC, 2.5V–18V input, and 150°C operation in a thermally robust TSSOP-making it the only choice for high-reliability, wide-range energy harvesting and backup power systems.
Availability
LTC3119HFE#TRPBF is available at Aetrix Electronics and suitable for solar battery chargers, system backup power supplies, RF power supplies, and 1- to 4-cell lithium battery powered products requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3119HFE#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 ICs, serving industrial, automotive, communications, and healthcare markets.
The LTC3119HFE#TRPBF belongs to Linear's high-efficiency monolithic DC/DC converter product line, designed specifically for wide-input, wide-output, high-current applications where seamless buck-boost operation, energy harvesting, and extreme temperature reliability are critical.
FAQ
What is the maximum continuous output current of the LTC3119HFE#TRPBF?
The LTC3119HFE#TRPBF delivers up to 5A continuous output current in buck mode when VIN > 6V and ambient temperature is within specification. At VIN = 3.6V and VOUT = 5V, it sustains 3A. Actual current depends on thermal design, PCB layout, and ambient conditions-its 150°C junction rating enables higher sustained loads than lower-grade variants like LTC3119EFE#TRPBF.
Does the LTC3119HFE#TRPBF support maximum power point tracking (MPPT)?
Yes, the LTC3119HFE#TRPBF implements Maximum Power Point Control (MPPC) via its dedicated MPPC pin (Pin 15), which senses input voltage through an external resistor divider and regulates it at 798mV. This feature is optimized for photovoltaic arrays and supercapacitors-not full digital MPPT algorithms-but provides effective analog-based input voltage regulation to maximize energy transfer.
Can the LTC3119HFE#TRPBF operate with input voltages below 2.5V?
Yes-the LTC3119HFE#TRPBF can operate with input voltages as low as 250mV after startup, provided the VCC regulator is bootstrapped from VOUT or another auxiliary supply. This capability enables full energy extraction from deeply discharged supercapacitors or thin-film batteries where conventional converters fail.
What is the purpose of the BST1 and BST2 pins on the LTC3119HFE#TRPBF?
BST1 (Pin 26) and BST2 (Pin 3) are bootstrap rails for the high-side N-channel MOSFET gate drivers. Each must connect via a 0.1µF ceramic capacitor to its respective switch node (SW1 and SW2) to generate gate drive voltage above the switch source, ensuring full enhancement of the high-side power FETs in both buck and boost phases.
How does the RUN pin function on the LTC3119HFE#TRPBF?
The RUN pin (Pin 18) serves dual functions: logic-level enable/disable and precision undervoltage lockout (UVLO). With a nominal 1.205V rising threshold and 90mV hysteresis, it allows external resistor dividers to set custom input UVLO points-e.g., disabling the LTC3119HFE#TRPBF when battery voltage drops below 2.9V-while also providing clean startup sequencing.
LTC3119HFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 5A
- Frequency - Switching:
- 400kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
LTC3119HFE#TRPBF FAQ
1.How can I place an order for LTC3119HFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3119HFE#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 LTC3119HFE#TRPBF reliable?
The price and inventory of LTC3119HFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3119HFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3119HFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3119HFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3119HFE#TRPBF?
LTC3119HFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3119HFE#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 LTC3119HFE#TRPBF?
For technical support, including LTC3119HFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3119HFE#TRPBF requirements.
6.How does Aetrix verify that LTC3119HFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3119HFE#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 LTC3119HFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3119HFE#TRPBF?
All LTC3119HFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3119HFE#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 LTC3119HFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3119HFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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