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Analog Devices Inc. LTC3112MPDHD#TRPBF
- Part No.:
- LTC3112MPDHD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3112MPDHD#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 2.5A 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,638
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Product details
Overview
LTC3112MPDHD#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, wide-input-range synchronous buck-boost DC/DC converter with 4-switch single-inductor architecture. It delivers up to 2.5A continuous output current at 5V with input range 2.7V–15V and output range 2.5V–14V, enabling seamless regulation when VIN is above, below, or equal to VOUT - ideal for multi-cell battery, backup capacitor, and dual-rail industrial power systems.
For engineers reviewing the LTC3112MPDHD#TRPBF datasheet, LTC3112MPDHD#TRPBF pinout, LTC3112MPDHD#TRPBF application, or LTC3112MPDHD#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature rating, 750kHz synchronizable switching frequency, internal 40–60mΩ N-channel MOSFETs, output current monitoring via IOUT pin, and integrated overvoltage protection with 0.83V OVP threshold.
Technical Context
The LTC3112MPDHD#TRPBF implements a proprietary voltage-mode control algorithm with dual current-limit protection: average current limit (6A typical) and peak current limit (10A typical), both thermally derated above 125°C. Its 4-switch topology enables continuous conduction mode across buck, buck-boost, and boost transitions without inductor current discontinuity or audible noise.
It integrates a 750kHz PLL-based oscillator with 300kHz–1.5MHz external synchronization capability, selectable PWM or Burst Mode® operation (50µA IQ), and internal soft-start (2ms nominal). The device features active inductor damping during shutdown/Burst Mode and thermal shutdown activation at ~170°C with auto-restart at ~160°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 15V - supports single/dual/triple Li-ion, 12V lead-acid, and supercapacitor backup sources without external pre-regulation. |
| Output Voltage Range | 2.5V to 14V - adjustable via FB resistor divider; regulated output remains stable regardless of VIN relative to VOUT. |
| Continuous Output Current | 2.5A at VIN ≥ 5V, VOUT = 5V, PWM mode - enabled by low RDS(ON) internal switches (40–60mΩ). |
| Switching Frequency | 750kHz typical, synchronizable 300kHz–1.5MHz - allows EMI optimization and inductor size reduction while maintaining efficiency. |
| Operating Junction Temp | –55°C to 150°C - fully tested and guaranteed for aerospace, downhole, and military-grade applications. |
| Shutdown Current | <1µA - enables ultra-low-power standby in battery-backed systems with long shelf life. |
| Feedback Reference Voltage | 0.80V ±2% - sets precise output regulation accuracy; used directly in VOUT = 0.8V × (1 + R1/R2) calculation. |
Pinout & Package
Package: 16-lead (5mm × 4mm × 0.75mm) plastic DFN with exposed thermal pad (Pin 17), rated for –55°C to 150°C junction temperature. Exposed pad must be soldered to PCB ground plane with multiple vias for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 10, 11, Exposed Pad) | Power & signal ground reference | Primary thermal path; exposed pad must be connected to large copper area for ≤4°C/W θJC. |
| VIN (Pins 4, 5) | Main input supply connection | Bypassed with ≥10µF low-ESR ceramic; supports 2.7V–15V input with UVLO at 2.3V (rising). |
| VOUT (Pin 8) | Regulated output node | Requires ≥47µF low-ESR ceramic output capacitor; provides up to 2.5A continuous load current. |
| SW1 (Pins 12, 13) | Switch A/B node | Connects to one end of external inductor; drives buck-stage switches with 40mΩ RDS(ON). |
| SW2 (Pins 9, 10) | Switch C/D node | Connects to other end of external inductor; drives boost-stage switches with 50–60mΩ RDS(ON). |
| FB (Pin 2) | Feedback voltage input | Senses output via resistor divider; regulates VOUT using 0.80V internal reference. |
| IOUT (Pin 7) | Current monitor output | Sources 24µA/A proportional to SW2-to-VOUT current; enables analog current limiting or measurement. |
| RUN (Pin 6) | Enable/shutdown control | Active-high logic; disables converter and reduces IQ to <1µA when pulled below 0.75V. |
| PWM/SYNC (Pin 16) | Mode selection & frequency sync | <0.5V = Burst Mode; >1.5V = fixed 750kHz PWM; 300–1500kHz square wave = external sync. |
Key Features
| Feature | Design Value |
|---|---|
| 4-Switch Synchronous Buck-Boost Topology | Enables seamless VIN-to-VOUT conversion across buck/boost boundaries without mode-hopping artifacts or output glitches. |
| Integrated N-Channel MOSFETs | Low RDS(ON): Switch A = 40mΩ, Switches B/C = 50mΩ, Switch D = 60mΩ - eliminates external FETs and gate drivers. |
| Output Current Monitor (IOUT) | 24µA/A linear current source referenced to SW2 current - supports programmable current limiting or real-time load monitoring. |
| Overvoltage Protection (OVP) | Adjustable 0.83V threshold with 20mV hysteresis - protects downstream circuitry if VOUT exceeds safe level due to feedback fault. |
| Thermal Shutdown with Hysteresis | Disables all switches at ~170°C; auto-restarts at ~160°C - prevents permanent damage during sustained overload or poor heatsinking. |
| Inductor Damping in Sleep | 250Ω active pull-down on SW1/SW2 during RUN=0 or Burst Mode - suppresses ringing and reduces EMI without external components. |
Applications
| Portable Medical Instrumentation | Industrial Backup Power Systems |
|---|---|
Use Scenario: Handheld ultrasound or glucose meters powered by 2–3 Li-ion cells (6–12.6V) requiring stable 3.3V/5V rails for MCU, ADC, and display. IC Role / Device Role / Timing Role: Primary wide-range buck-boost regulator delivering regulated output independent of battery state-of-charge. Use Value: Eliminates need for separate buck and boost converters; maintains regulation down to 2.7V cell cutoff while supporting 15V input surges. |
Use Scenario: PLC I/O modules with supercapacitor backup that must sustain 12V/1A output during AC mains failure. IC Role / Device Role / Timing Role: Bidirectional energy transfer controller converting stored capacitor energy (0–15V) to regulated 12V system rail. Use Value: Single-chip solution handles variable-capacitor voltage decay without external supervision; 95% peak efficiency extends hold-up time. |
| RF Transmitter Power Supply | Automotive Infotainment Head Units |
Use Scenario: 5G mmWave front-end modules requiring clean, ripple-free 5V supply from 12V vehicle battery with cold-crank tolerance (down to 3.5V). IC Role / Device Role / Timing Role: High-PWM-mode regulator with low-noise operation and fast transient response for PA bias rails. Use Value: 750kHz fixed-frequency operation minimizes interference with RF bands; 2.5A capability supports burst transmit loads. |
Use Scenario: In-vehicle navigation units powered from 9–16V automotive bus, needing isolated 3.3V/5V/12V rails for SoC, touchscreen, and audio amplifiers. IC Role / Device Role / Timing Role: Primary intermediate bus converter generating stable 5V from unregulated input with reverse-current blocking. Use Value: Built-in reverse current limit prevents backfeed into battery during load dump; –55°C rating ensures cold-weather startup reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3115IDHD#TRPBF | Higher 36V max input, 3.5A output, but only rated for –40°C to 125°C; no IOUT pin; uses different compensation scheme. | Better suited for 24V industrial inputs; lacks current monitoring for closed-loop load control. | Select when input exceeds 15V or higher output current is required; avoid when extended temp or analog current sensing is mandatory. |
| MAX20406AATJ+ | 3.5V–36V input, 3A output, 2.2MHz switching, but requires external MOSFETs and has no OVP pin; operates down to –40°C only. | Targets space-constrained designs needing high frequency; lacks integrated protection features like OVP and thermal shutdown. | Choose for compact layouts where board area is critical and external FETs are acceptable; not suitable for harsh-temperature or safety-critical use. |
Compared with LTC3115IDHD#TRPBF and MAX20406AATJ+, the LTC3112MPDHD#TRPBF uniquely combines –55°C operation, integrated current monitoring, and adjustable OVP in a 16-pin DFN - making it optimal for mission-critical, wide-temperature, and current-controlled applications where component count and qualification scope matter.
Availability
LTC3112MPDHD#TRPBF is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial backup power systems, RF transmitter power supplies, and automotive infotainment head units requiring stable component supply across extreme temperature environments.
Supply support for LTC3112MPDHD#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, formed through the acquisition of Linear Technology in 2017.
The LTC3112MPDHD#TRPBF belongs to ADI's Power by Linear™ family of high-reliability DC/DC converters, designed specifically for demanding applications requiring wide input/output ranges, extended temperature operation, and robust protection features in aerospace, defense, and industrial systems.
FAQ
What is the maximum continuous output current of the LTC3112MPDHD#TRPBF?
The LTC3112MPDHD#TRPBF delivers up to 2.5A continuous output current at 5V when VIN ≥ 5V and operating in PWM mode. This rating assumes proper thermal design with the exposed pad soldered to a ≥4cm² copper area and ambient temperature ≤40°C. At higher temperatures or lower input voltages, derating applies per the die temperature rise curves in the datasheet.
Does the LTC3112MPDHD#TRPBF support external frequency synchronization?
Yes, the LTC3112MPDHD#TRPBF supports external synchronization via its PWM/SYNC pin. Applying a square wave between 300kHz and 1.5MHz overrides the internal 750kHz oscillator. The signal must maintain minimum high/low times of 100ns, and the pin also serves dual function: DC voltage <0.5V selects Burst Mode®, >1.5V selects fixed-frequency PWM mode.
How does the IOUT pin on the LTC3112MPDHD#TRPBF function?
The IOUT pin on the LTC3112MPDHD#TRPBF sources a current of 24µA per ampere of SW2-to-VOUT output current. This linear relationship enables real-time analog current monitoring or programmable current limiting by feeding IOUT into an op-amp comparator or ADC. Accuracy is specified as ±12µA at 1.5A load, with temperature-dependent drift characterized in the datasheet.
What protection features are integrated into the LTC3112MPDHD#TRPBF?
The LTC3112MPDHD#TRPBF integrates short-circuit protection via dual current limiting (average and peak), overvoltage protection (adjustable 0.83V OVP threshold), thermal shutdown (~170°C with hysteresis), reverse current limiting (–1A typical), and input undervoltage lockout (2.3V rising). All protections are fully functional across its –55°C to 150°C operating range.
Is the LTC3112MPDHD#TRPBF pin-compatible with other variants in the LTC3112 family?
Yes, the LTC3112MPDHD#TRPBF shares identical pinout and footprint with all DFN-package variants (e.g., LTC3112EDHD#TRPBF, LTC3112HDHD#TRPBF), differing only in temperature grade and test screening. The 16-pin DFN layout is mechanically and electrically interchangeable, allowing drop-in replacement in existing designs when upgrading to the –55°C to 150°C qualified version.
LTC3112MPDHD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN 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):
- 2.7V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 14V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 750kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x4)
LTC3112MPDHD#TRPBF FAQ
1.How can I place an order for LTC3112MPDHD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3112MPDHD#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 LTC3112MPDHD#TRPBF reliable?
The price and inventory of LTC3112MPDHD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3112MPDHD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3112MPDHD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3112MPDHD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3112MPDHD#TRPBF?
LTC3112MPDHD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3112MPDHD#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 LTC3112MPDHD#TRPBF?
For technical support, including LTC3112MPDHD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3112MPDHD#TRPBF requirements.
6.How does Aetrix verify that LTC3112MPDHD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3112MPDHD#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 LTC3112MPDHD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3112MPDHD#TRPBF?
All LTC3112MPDHD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3112MPDHD#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 LTC3112MPDHD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3112MPDHD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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