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Analog Devices Inc. LTC3119EFE#TRPBF
- Part No.:
- LTC3119EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3119EFE#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 5A 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,498
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Product details
Overview
LTC3119EFE#TRPBF from Analog Devices is a monolithic 18V, 5A synchronous buck-boost DC/DC converter in a 28-lead enhanced TSSOP package. It delivers up to 5A output current in buck mode (VIN > 6V), supports 2.5V–18V input and 0.8V–18V output ranges, operates down to 250mV after startup, and features proprietary 4-switch PWM architecture for seamless VIN-to-VOUT transitions - ideal for battery-powered RF power supplies and solar backup systems.
For engineers reviewing the LTC3119EFE#TRPBF datasheet, LTC3119EFE#TRPBF pinout, LTC3119EFE#TRPBF application, or LTC3119EFE#TRPBF equivalent, key selection criteria include its 400kHz–2MHz programmable switching frequency, Burst Mode® operation (35µA no-load IQ), maximum power point control (MPPC), integrated 30mΩ N-channel switches, and thermal performance with θJA = 21°C/W in the FE package.
Technical Context
The LTC3119EFE#TRPBF implements a current-mode controlled 4-switch buck-boost topology with independent high-side and low-side gate drivers (BST1/BST2), enabling continuous regulation across VIN < VOUT, VIN = VOUT, and VIN > VOUT without mode transition artifacts. Its internal VCC LDO (3.7V ±150mV) powers control circuitry and supports up to 10mA external load.
Operation includes dual-mode control: fixed-frequency PWM (enabled via PWM/SYNC high or heavy load) and Burst Mode® (enabled via PWM/SYNC low at light loads), with automatic seamless transition. The RUN pin provides accurate undervoltage lockout (1.205V threshold, 90mV hysteresis), while MPPC enables input voltage regulation for photovoltaic or supercapacitor sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 18V continuous; operates down to 250mV after startup when VCC is bootstrapped - enables full energy extraction from depleted batteries or supercapacitors. |
| Output Voltage Range | 0.8V to 18V programmable via FB resistor divider - supports wide-range system rail generation including 3.3V, 5V, and 12V outputs. |
| Max Output Current | 5A in buck mode (VIN > 6V); 3A at VIN = 3.6V/VOUT = 5V - defined by internal 8A current limit and thermal limits in FE package. |
| Switching Frequency | 400kHz to 2MHz, set by RT resistor or synchronized externally via PWM/SYNC pin - balances PCB area (higher fSW) vs. efficiency (lower fSW). |
| Quiescent Current | 35µA in Burst Mode® no-load operation; 3µA shutdown current - extends battery life in always-on portable devices. |
| Power Switch RDS(ON) | 30mΩ per switch (PVIN→SW1, SW1→PGND, SW2→PGND, SW2→PVOUT) - minimizes conduction loss and thermal rise at 5A load. |
| MPPC Function | Configurable input voltage regulation via MPPC pin (774–822mV threshold) - maintains peak power transfer from PV arrays or current-limited sources. |
Pinout & Package
The LTC3119EFE#TRPBF is housed in a 28-lead plastic enhanced TSSOP package (JEDEC MO-153) with exposed thermal pad (Pin 29 = PGND). Thermal resistance θJA = 21°C/W enables reliable 5A operation with standard 2-layer PCB layout and proper ground plane connection to the exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pins 4, 9, 20, 25, Exposed Pad 29) | Power Ground Reference | Low-impedance return path for all high-current switches; exposed pad must be soldered to PCB ground plane for thermal and electrical performance. |
| SW1 (Pins 21, 24) | Buck-Boost Power Switch Node A | Connects to one end of inductor; drives current from PVIN to PGND in buck mode or from PVOUT to PGND in boost mode. |
| SW2 (Pins 5, 8) | Buck-Boost Power Switch Node D | Connects to other end of inductor; drives current from SW1 to PVOUT in boost mode or from PVIN to SW1 in buck mode. |
| PVIN (Pins 22, 23) | Main Input Power Supply | High-current input connection to switch A; requires ≥10µF low-ESR ceramic capacitor directly to PGND. |
| PVOUT (Pins 6, 7) | Main Output Power Supply | High-current output connection to switch D; requires ≥10µF low-ESR ceramic capacitor directly to PGND. |
| FB (Pin 12) | Output Voltage Feedback Input | Senses regulated output via resistive divider; 795mV nominal reference enables precise VOUT programming (e.g., 5V = 795mV × (1 + R1/R2)). |
| RT (Pin 17) | Oscillator Frequency Programming | Resistor to GND sets switching frequency: 76.8kΩ = 1MHz; supports 400kHz–2MHz range for layout and EMI optimization. |
| RUN (Pin 18) | Enable & UVLO Control Input | 1.205V rising threshold with 90mV hysteresis; enables custom input undervoltage lockout using external resistor divider from VIN. |
| MPPC (Pin 15) | Maximum Power Point Control Setpoint | 774–822mV threshold; connects to VIN–GND divider to regulate input voltage for solar/battery harvesting applications. |
| PWM/SYNC (Pin 28) | Mode Control & Clock Sync Input | High = forced PWM mode; low = Burst Mode®; external clock > RT-set frequency enables synchronization for noise-sensitive systems. |
Key Features
| Feature | Design Value |
|---|---|
| 4-Switch Synchronous Buck-Boost Topology | Enables seamless regulation across input/output crossover without output glitches or subharmonic oscillation - critical for stable RF and precision analog rails. |
| Burst Mode® Operation | Reduces no-load input current to 35µA while maintaining tight output regulation - extends runtime in battery-backed IoT sensors and wearables. |
| Integrated 30mΩ Power Switches | Eliminates need for external MOSFETs and drivers; reduces BOM count and PCB footprint while delivering >94% peak efficiency at 5A. |
| Maximum Power Point Control (MPPC) | Allows direct input voltage regulation from photovoltaic panels or supercapacitors without external controllers - simplifies energy harvesting designs. |
| Programmable 400kHz–2MHz Switching | Supports compact magnetics (high fSW) or higher efficiency (low fSW); PLL-based sync capability suppresses EMI in mixed-signal systems. |
| Accurate RUN Pin UVLO (1.205V ±35mV) | Enables precise, temperature-stable input voltage supervision with <100mV hysteresis - improves system reliability during brownout conditions. |
Applications
| RF Power Supply | Solar Battery Charger |
|---|---|
Use Scenario: Powering 5V/3A RF transceivers in portable radios where input voltage varies from 3.6V (single Li-ion) to 16.8V (4S Li-ion pack). IC Role / Device Role / Timing Role: Primary buck-boost regulator providing constant 5V output regardless of battery state-of-charge or load transients. Use Value: Seamless VIN-to-VOUT transition prevents RF carrier dropouts during battery discharge; 35µA Burst Mode® extends talk time between charges. |
Use Scenario: Charging 12V lead-acid battery from 18–22V photovoltaic panel under partial shading conditions. IC Role / Device Role / Timing Role: Input-regulated buck-boost converter implementing MPPT via MPPC pin to maximize harvested solar energy. Use Value: Direct MPPC control eliminates need for external microcontroller or ADC; maintains >92% conversion efficiency across 100mA–3A input current range. |
| System Backup Power | Wide-Range Industrial Sensor |
Use Scenario: Providing uninterrupted 3.3V supply to microcontroller and SRAM during AC mains failure, backed by 5.5V supercapacitor bank. IC Role / Device Role / Timing Role: Bidirectional-capable buck-boost managing energy flow from supercapacitor to load, operating down to 250mV input. Use Value: 250mV minimum operating voltage extracts >95% of stored supercapacitor energy; 3µA shutdown current preserves backup charge for months. |
Use Scenario: Powering 3.3V industrial sensor node powered by unregulated 6–15V field bus or 2–4 cell NiMH battery stack. IC Role / Device Role / Timing Role: Primary DC/DC regulator delivering stable 3.3V rail with ±1% line/load regulation over full input range. Use Value: 2.5V–18V input range eliminates need for pre-regulators; integrated soft-start prevents inrush current damage to upstream power sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8390AEMSE#TRPBF | Higher 60V input rating, 4A output, requires external MOSFETs; no integrated MPPC or 250mV start-up capability. | Better suited for 24V/48V industrial buses; lacks ultra-low VIN support for supercapacitor backup. | Select when input exceeds 18V or higher fault tolerance is required; avoid when MPPC or sub-1V operation is needed. |
| TPS63020DSJR | Lower 5.5V max input, 3A output, fixed 2.5MHz fSW, no MPPC or programmable frequency; smaller 10-pin SON package. | Ideal for space-constrained consumer wearables; cannot replace LTC3119EFE#TRPBF in solar or wide-input industrial use cases. | Choose for cost-sensitive, low-power portable designs with VIN ≤ 5.5V; not suitable for 12V+ inputs or energy harvesting. |
Compared with LT8390A and TPS63020, the LTC3119EFE#TRPBF uniquely combines 18V input, 5A output, 250mV dropout operation, integrated MPPC, and 400kHz–2MHz programmability - making it the only single-chip solution for high-current, wide-input, energy-harvesting applications requiring minimal external components.
Availability
LTC3119EFE#TRPBF is available at Aetrix Electronics and suitable for RF power supplies, solar battery chargers, and system backup power applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and aerospace programs.
Supply support for LTC3119EFE#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 medical markets.
The LTC3119EFE#TRPBF belongs to Linear's high-efficiency monolithic DC/DC converter product line, designed specifically for wide-input, high-current applications where seamless buck-boost operation, ultra-low quiescent current, and energy harvesting capability are essential.
FAQ
What is the minimum input voltage for continuous operation of the LTC3119EFE#TRPBF?
The LTC3119EFE#TRPBF operates continuously down to 250mV after startup when the VCC rail is externally bootstrapped (e.g., from VOUT or auxiliary supply). This enables full energy recovery from deeply discharged batteries or supercapacitors. Without bootstrapping, the minimum operating input is 2.5V due to VCC UVLO.
Does the LTC3119EFE#TRPBF support synchronization to an external clock?
Yes, the LTC3119EFE#TRPBF supports external clock synchronization via the PWM/SYNC pin. When an external clock signal above the RT-programmed frequency is applied, the internal PLL locks to it - enabling deterministic switching in noise-sensitive systems like RF transceivers or precision data acquisition circuits.
How does Maximum Power Point Control (MPPC) work on the LTC3119EFE#TRPBF?
The LTC3119EFE#TRPBF implements MPPC by regulating the input voltage to maintain a fixed voltage at the MPPC pin (774–822mV). A resistor divider from VIN to GND sets this point, allowing the converter to draw optimal current from photovoltaic panels or other current-limited sources without external MPPT controllers.
What is the thermal performance difference between the QFN and TSSOP packages for the LTC3119EFE#TRPBF?
The LTC3119EFE#TRPBF in the 28-lead enhanced TSSOP package has θJA = 21°C/W, slightly better than the QFN's 22°C/W due to optimized internal thermal path and larger exposed pad area. Both packages support 5A output with appropriate PCB copper area, but the TSSOP offers easier rework and inspection in high-reliability manufacturing.
Can the LTC3119EFE#TRPBF operate in Burst Mode® and PWM mode simultaneously?
No - the LTC3119EFE#TRPBF operates exclusively in either Burst Mode® (at light loads, <~400mA) or fixed-frequency PWM mode (at heavier loads), with automatic seamless transition. Forcing PWM/SYNC high disables Burst Mode® entirely, locking the device into PWM operation regardless of load current.
LTC3119EFE#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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
LTC3119EFE#TRPBF FAQ
1.How can I place an order for LTC3119EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3119EFE#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 LTC3119EFE#TRPBF reliable?
The price and inventory of LTC3119EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3119EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3119EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3119EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3119EFE#TRPBF?
LTC3119EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3119EFE#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 LTC3119EFE#TRPBF?
For technical support, including LTC3119EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3119EFE#TRPBF requirements.
6.How does Aetrix verify that LTC3119EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3119EFE#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 LTC3119EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3119EFE#TRPBF?
All LTC3119EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3119EFE#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 LTC3119EFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3119EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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