My Inquiry
My Account
Analog Devices Inc. LTC3119MPFE#TRPBF
- Part No.:
- LTC3119MPFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3119MPFE#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 5A 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,062
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3119MPFE#TRPBF from Analog Devices is a high-efficiency, monolithic 4-switch synchronous buck-boost DC/DC converter delivering up to 5A output current with 2.5V–18V input and 0.8V–18V output voltage ranges. It features programmable 400kHz–2MHz switching frequency, Burst Mode® operation (35µA no-load IQ), and maximum power point control (MPPC) for photovoltaic or supercapacitor backup systems. Used in RF power supplies and wide-input battery-powered equipment.
For engineers reviewing the LTC3119MPFE#TRPBF datasheet, LTC3119MPFE#TRPBF pinout, LTC3119MPFE#TRPBF application, or LTC3119MPFE#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature rating, 28-lead TSSOP package with exposed PGND pad, seamless buck-boost mode transition, and MPPC capability for energy-harvesting inputs.
Technical Context
The LTC3119MPFE#TRPBF implements a proprietary 4-switch PWM architecture enabling continuous regulation across VIN < VOUT, VIN = VOUT, and VIN > VOUT without mode-switching transients. Its current-mode control loop uses an internal 795mV feedback reference and error amplifier with 120µS transconductance for stable compensation.
It integrates dual bootstrap drivers (BST1/BST2), a 3.7V internal VCC LDO (180mA limit), and a precision RUN comparator (1.205V threshold, 90mV hysteresis) for accurate input UVLO. The MPPC pin accepts a resistive divider to regulate input voltage at 798mV, supporting solar charger and capacitor backup applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 18V; supports unregulated sources including 1–4-cell Li-ion stacks and backup capacitors. |
| Output Voltage Range | 0.8V to 18V; adjustable via external resistor divider on FB pin with 795mV nominal reference. |
| Max Output Current | 5A in buck mode (VIN > 6V); 3A at VIN = 3.6V/VOUT = 5V; limited by thermal design and 8A internal switch current limit. |
| Switching Frequency | 400kHz to 2MHz; set by RT pin resistor or synchronized externally via PWM/SYNC pin. |
| No-Load Quiescent Current | 35µA in Burst Mode; enables ultra-low power standby in battery-critical systems. |
| Operating Temperature | –55°C to +150°C junction; fully tested and guaranteed for aerospace, military, and downhole industrial use. |
| Power Switch RDS(ON) | 30mΩ per N-channel switch (PVIN→SW1, SW1→PGND, SW2→PGND, SW2→PVOUT); minimizes conduction loss. |
Pinout & Package
The LTC3119MPFE#TRPBF is housed in a thermally enhanced 28-lead Plastic Enhanced TSSOP package with exposed PGND pad (Pin 29) requiring soldering to PCB ground plane for thermal performance (θJA = 21°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pins 4, 9, 20, 25, Exposed Pad 29) | Power Ground Reference | Mandatory low-impedance connection to PCB ground plane; exposed pad must be soldered for thermal derating compliance. |
| VIN (Pin 19) | VCC Regulator Input | Supplies internal 3.7V LDO; requires local 4.7µF ceramic capacitor to PGND. |
| VCC (Pin 16) | Internal Control Rail Output | Provides regulated 3.7V supply for internal circuitry and up to 10mA external load. |
| FB (Pin 12) | Feedback Voltage Input | Sets output voltage via resistor divider; 795mV nominal reference enables precise regulation. |
| RT (Pin 17) | Oscillator Frequency Programming | Resistor to PGND sets switching frequency from 400kHz to 2MHz (e.g., 76.8kΩ = 1MHz). |
| RUN (Pin 18) | Enable & UVLO Threshold Input | Enables IC when >1.205V; hysteresis ensures clean start-up; supports custom input undervoltage lockout. |
| MPPC (Pin 15) | Maximum Power Point Control Setpoint | Connects to VIN/GND divider to regulate input voltage at 798mV; disables MPPC when tied to VCC. |
| PWM/SYNC (Pin 28) | Mode Control & Clock Sync Input | High = forced PWM; low = Burst Mode; external clock sync up to 2MHz with ≥100ns pulse width. |
| BST1 (Pin 26) | SW1 Gate Driver Bootstrap | Must connect 0.1µF capacitor between BST1 and SW1 to generate high-side gate drive rail. |
| BST2 (Pin 3) | SW2 Gate Driver Bootstrap | Must connect 0.1µF capacitor between BST2 and SW2 to generate high-side gate drive rail. |
| PVIN (Pins 22, 23) | Main Input Power Path | Connects to input source; requires ≥10µF low-ESR capacitor to PGND for stability. |
| PVOUT (Pins 6, 7) | Main Output Power Path | Delivers regulated output; requires ≥10µF low-ESR capacitor to PGND for ripple suppression. |
| SW1 (Pins 21, 24) | High-Side Buck Switch Node | Connects to one side of inductor; carries full load current in buck mode. |
| SW2 (Pins 5, 8) | High-Side Boost Switch Node | Connects to same inductor node as SW1; carries full load current in boost mode. |
| PGOOD (Pin 10) | Open-Drain Power-Good Indicator | Pulls low when FB drops >8% below regulation; requires external pull-up for system monitoring. |
| VC (Pin 13) | Error Amplifier Output | Requires external RC compensation network to SGND for loop stability. |
| SGND (Pin 14) | Signal Ground Reference | Separate from PGND; connects only to analog control circuitry ground return path. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless Buck-Boost Transition | Proprietary 4-switch PWM eliminates output transients during VIN/VOUT crossover, critical for noise-sensitive RF loads. |
| Maximum Power Point Control (MPPC) | Regulates input voltage at 798mV using external divider; extracts peak power from PV cells or supercapacitors. |
| Ultralow-Noise PWM Algorithm | Suppresses subharmonics and maintains constant-frequency spectrum in PWM mode, reducing EMI filter burden. |
| Extended Temperature Operation | –55°C to +150°C guaranteed performance enables deployment in harsh environments without derating. |
| Integrated Bootstrap Drivers | Dual BST1/BST2 pins eliminate external charge pumps; reduce BOM count and layout complexity. |
| Accurate RUN Comparator | 1.205V ±35mV threshold with 90mV hysteresis enables precise, repeatable input UVLO for system-level brownout protection. |
Applications
| Solar Battery Chargers | RF Power Supplies |
|---|---|
Use Scenario: Photovoltaic panel feeding a 12V battery bank through MPPT regulation. IC Role / Device Role / Timing Role: Buck-boost controller with MPPC function regulating input voltage at 798mV while delivering 5A at 12V. Use Value: Maximizes energy harvest under partial shading or low-light conditions without external MPPT IC. | Use Scenario: Powering GaN PA stages in 5G base station radios requiring ultra-stable 5V/3A supply. IC Role / Device Role / Timing Role: Low-noise buck-boost regulator operating in fixed-frequency PWM mode at 1.2MHz. Use Value: Delivers <10mVpp ripple and minimal spectral noise, eliminating need for post-regulation LDOs. |
| System Backup Power Supplies | Lead-Acid to 12V Regulator |
Use Scenario: Supercapacitor-based hold-up supply maintaining 5V rail during AC mains failure. IC Role / Device Role / Timing Role: Wide-input buck-boost converter operating down to 250mV after start-up using VCC bootstrapping. Use Value: Extracts >95% of stored energy from 5V supercap bank, extending backup time by 2.3× vs conventional converters. | Use Scenario: Converting 9–15V lead-acid vehicle battery to regulated 12V for infotainment head units. IC Role / Device Role / Timing Role: Input-robust buck-boost maintaining 12V output during cold-crank (4.5V) and load-dump (18V) events. Use Value: Eliminates need for pre-regulator stage; withstands automotive transients without shutdown or reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3115IUFD#TRPBF | 40V max input, 2.5A output, no MPPC, QFN-24 package, –40°C to 125°C rating | Lacks MPPC and extended temperature range; suitable for non-energy-harvesting 12V systems | Select when input voltage exceeds 18V or cost sensitivity outweighs MPPC requirement |
| MAX20406AATJ+ | 16V max input, 4A output, I²C programmable, 20-pin TQFN, –40°C to 125°C rating | Offers digital interface and smaller footprint but no MPPC or extended temp support | Select when firmware-controlled voltage sequencing or compact layout is prioritized over analog MPPC |
Compared with LTC3115IUFD#TRPBF and MAX20406AATJ+, the LTC3119MPFE#TRPBF uniquely combines –55°C to 150°C operation, integrated MPPC, and 5A capability in a single monolithic solution-making it irreplaceable for mission-critical energy-harvesting and extreme-environment applications.
Availability
LTC3119MPFE#TRPBF is available at Aetrix Electronics and suitable for solar battery chargers, RF power supplies, system backup power supplies, and lead-acid to 12V regulators requiring stable component supply across extended temperature ranges.
Supply support for LTC3119MPFE#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.
The LTC3119 belongs to Linear's monolithic buck-boost converter product line, designed specifically for wide-input, high-current applications where seamless voltage crossover and energy harvesting intelligence are required.
FAQ
What is the minimum input voltage for continuous operation of the LTC3119MPFE#TRPBF?
The LTC3119MPFE#TRPBF can operate continuously with input voltages as low as 250mV after start-up, provided the VCC rail is maintained-typically achieved by bootstrapping VCC from the output or an auxiliary supply. This capability enables full energy extraction from supercapacitors and depleted batteries, a key differentiator versus standard buck-boost ICs.
Does the LTC3119MPFE#TRPBF support external clock synchronization?
Yes, the LTC3119MPFE#TRPBF supports external clock synchronization via the PWM/SYNC pin, accepting input clocks up to 2MHz with a minimum pulse width of 100ns. The internal PLL locks to the external clock only if it exceeds the RT-programmed frequency, making it ideal for noise-sensitive applications like RF transceivers where switching harmonics must align with system timing domains.
How does the Maximum Power Point Control (MPPC) function work in the LTC3119MPFE#TRPBF?
The MPPC function in the LTC3119MPFE#TRPBF regulates the input voltage at 798mV by adjusting the converter's duty cycle. A resistor divider from VIN to GND connects to the MPPC pin to set the target input voltage; the IC then dynamically controls power transfer to maintain that voltage-enabling optimal power extraction from photovoltaic panels or supercapacitors without external MPPT controllers.
What thermal considerations apply to the LTC3119MPFE#TRPBF in its 28-lead TSSOP package?
The LTC3119MPFE#TRPBF in the 28-lead TSSOP package has a θJA of 21°C/W and requires the exposed PGND pad (Pin 29) to be soldered to a minimum 200mm² copper area on the PCB for rated thermal performance. At 5A output and 12V input/output, junction temperature rise exceeds 60°C without adequate copper; thermal vias under the pad and internal ground planes are strongly recommended for sustained operation above 3A.
Can the LTC3119MPFE#TRPBF operate in both buck and boost modes simultaneously?
No-the LTC3119MPFE#TRPBF operates in either buck or boost mode at any instant, but its 4-switch architecture enables seamless, transient-free transitions between them as input or load conditions change. When VIN crosses VOUT, the control loop automatically adjusts switch timing without discontinuity in inductor current or output voltage, eliminating the need for external mode-selection logic or complex compensation.
LTC3119MPFE#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:
- -55°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
LTC3119MPFE#TRPBF FAQ
1.How can I place an order for LTC3119MPFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3119MPFE#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 LTC3119MPFE#TRPBF reliable?
The price and inventory of LTC3119MPFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3119MPFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3119MPFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3119MPFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3119MPFE#TRPBF?
LTC3119MPFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3119MPFE#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 LTC3119MPFE#TRPBF?
For technical support, including LTC3119MPFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3119MPFE#TRPBF requirements.
6.How does Aetrix verify that LTC3119MPFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3119MPFE#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 LTC3119MPFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3119MPFE#TRPBF?
All LTC3119MPFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3119MPFE#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 LTC3119MPFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3119MPFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3119MPFE#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
