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Analog Devices Inc. LTC3113EDHD#TRPBF
- Part No.:
- LTC3113EDHD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3113EDHD#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 3A 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,959
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Product details
Overview
LTC3113EDHD#TRPBF from Analog Devices (formerly Linear Technology) is a wide-input, synchronous buck-boost DC/DC converter IC delivering up to 3A continuous output current with input and output voltage ranges of 1.8V–5.5V. It operates seamlessly across buck, buck-boost, and boost modes using a proprietary four-switch topology, features programmable switching frequency (300kHz–2MHz), and integrates low-RDS(ON) MOSFETs for high efficiency (up to 96%) in RF and precision instrumentation power supplies.
For engineers reviewing the LTC3113EDHD#TRPBF datasheet, LTC3113EDHD#TRPBF pinout, LTC3113EDHD#TRPBF application, or LTC3113EDHD#TRPBF equivalent, key selection criteria include its 3A output capability at VIN > 3.0V/VOUT = 3.8V, <1μA shutdown current, Burst Mode® operation for light-load efficiency, and thermal performance enabled by its exposed-pad 16-lead DFN (4mm × 5mm) package.
Technical Context
The LTC3113EDHD#TRPBF implements a fixed-frequency, voltage-mode controlled four-switch buck-boost architecture with independent gate drivers and anti-cross-conduction logic. Its proprietary switching algorithm enables continuous mode transitions between buck (SWD on), buck-boost (SWA/SWD & SWB/SWC active), and boost (SWA on) without inductor current discontinuity or loop transfer function disruption.
It integrates dual error amplifiers-one for regulation (VC pin), one for current limiting-and features two independent current limit circuits: an average input current limit (7.8A typ.) with feedback injection into FB, and a fast peak current limit (11.1A typ.) for hard short protection. Reverse current limiting (–1.0A typ.) activates on SW2 during fixed-frequency operation when external sources force VOUT above regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, 3.3V/5V rails, and backup battery inputs without pre-regulation. |
| Output Voltage Range | 1.8V to 5.5V - adjustable via resistor divider on FB pin; regulated output remains stable whether VIN is above, below, or equal to VOUT. |
| Continuous Output Current | 3A at VIN > 3.0V, VOUT = 3.8V - full rated load only in PWM mode; Burst Mode reduces max load to ~1.2A depending on VIN/VOUT. |
| Switching Frequency | 300kHz to 2MHz - set by RT-to-SGND resistor; higher frequencies enable smaller magnetics but increase reverse current risk above 1MHz. |
| Efficiency | Up to 96% - achieved with integrated 25mΩ/30mΩ PMOS/NMOS switches and synchronous rectification; optimized for 1.8V–5.5V input/output combinations. |
| Shutdown Current | <1μA - enables ultra-low-power standby in portable instrumentation and wireless modems with true output disconnect. |
| Feedback Reference | 600mV ±2% - precise internal reference enables accurate output programming; FB input bias current ≤50nA minimizes divider error. |
Pinout & Package
Package: 16-lead (4mm × 5mm × 0.75mm) plastic DFN with exposed PGND pad (Pin 17), rated for –40°C to 125°C junction temperature. Thermal resistance θJA = 36.5°C/W; requires soldered exposed pad for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pins 1, 2) | Buck-boost output node | High-current output terminal; requires low-ESR capacitor (≥100μF) placed adjacent to pins with short PGND return path. |
| VIN (Pins 3, 4, 5) | Power input supply | Accepts 1.8V–5.5V input; bypassed with ≥47μF capacitor directly to PGND; multiple pins reduce trace inductance and IR drop. |
| SGND (Pin 6) | Signal ground reference | Reference point for RT, FB, VC compensation network; must be isolated from PGND except at single-point star connection. |
| BURST (Pin 7) | Mode selection control | Logic-high enables Burst Mode® (low IQ); logic-low forces fixed-frequency PWM mode (full 3A output). |
| RT (Pin 8) | Oscillator frequency programming | Resistor to SGND sets switching frequency per RT ≅ 90/fMHz kΩ; tolerance affects accuracy of timing and EMI profile. |
| VC (Pin 9) | Error amplifier output | Compensation node; connects to FB via R-C network; voltage determines duty cycle; sourcing/sinking capability supports loop stability. |
| FB (Pin 10) | Feedback input | Monitors output via resistor divider; 600mV reference enables VOUT = 0.6V × (1 + R2/R1); Thevenin resistance >100kΩ required for current limit function. |
| RUN (Pin 11) | Enable/disable control | Active-high logic input; <0.3V disables IC with output disconnect; >1.2V enables with internal soft-start (2ms typical). |
| SW1 (Pins 12, 13, 14) | Switch node A/B connection | Connects internal PMOS (A) and NMOS (B) switches; ties to one end of inductor; requires minimized trace length for EMI reduction. |
| SW2 (Pins 15, 16) | Switch node C/D connection | Connects internal NMOS (C) and PMOS (D) switches; ties to other end of inductor; same layout priority as SW1 for noise control. |
| PGND (Exposed Pad Pin 17) | Power ground return | Primary thermal and current return path; must be soldered to large PCB copper area; failure to connect degrades thermal performance and causes instability. |
Key Features
| Feature | Design Value |
|---|---|
| Four-switch synchronous buck-boost topology | Enables seamless VIN/VOUT crossover without mode-hopping artifacts-critical for stable RF bias and sensor excitation rails. |
| Selectably programmable frequency (300kHz–2MHz) | Allows EMI optimization: lower frequencies suit high-current/low-EMI designs; higher frequencies shrink inductor size but require attention to reverse current limits. |
| Burst Mode® operation | Reduces no-load input current to <55μA while maintaining regulation-extends battery life in portable barcode readers and inventory terminals. |
| Integrated soft-start (2ms typical) | Prevents inrush current and output overshoot during power-up; operates independently of BURST pin state, ensuring safe startup in all modes. |
| Comprehensive protection suite | Includes input current limit (7.8A), peak current limit (11.1A), reverse current limit (–1.0A), thermal shutdown (155°C), and UVLO (1.6V). |
| Low-noise fixed-frequency PWM mode | Eliminates variable-frequency artifacts in sensitive analog front-ends; delivers full 3A output with <20mVP-P ripple at 3.8V/3A in typical layouts. |
Applications
| Wireless Modems | Backup Power Systems |
|---|---|
|
Use Scenario: Powering LTE/5G modem baseband and RF sections from a single Li-ion cell (3.0–4.2V) while maintaining stable 3.3V or 3.8V rails. IC Role / Device Role / Timing Role: Primary buck-boost regulator providing regulated VCC and VRF with dynamic load step response and low conducted EMI. Use Value: Eliminates need for separate buck and boost converters; maintains regulation during deep discharge (down to 3.0V) and supports burst transmission peaks up to 3A. |
Use Scenario: Maintaining system operation during main power failure using supercapacitor or backup battery (1.8–3.6V) while powering 3.3V microcontrollers and memory. IC Role / Device Role / Timing Role: Bidirectional-capable regulator that sustains VOUT regardless of VIN sag, with reverse current limiting to prevent backup source depletion. Use Value: Enables seamless switchover without brownout; <1μA shutdown current preserves backup energy for >1 year in storage. |
| Portable Instrumentation | Portable Barcode Readers |
|
Use Scenario: Supplying precision ADC references, op-amp rails, and sensor excitation from a compact 2-cell alkaline or Li-ion source (2.4–5.5V). IC Role / Device Role / Timing Role: Low-noise power source with <20mVP-P ripple in PWM mode, supporting 16-bit+ measurement accuracy. Use Value: Replaces LDO-based solutions with 3× higher efficiency; programmable frequency avoids interference with sampling clocks or RF bands. |
Use Scenario: Powering laser diode drivers, CMOS image sensors, and decode processors in handheld scanners operating from 1.8–3.6V primary cells. IC Role / Device Role / Timing Role: High-efficiency, low-quiescent regulator enabling >8-hour runtime on AA batteries with Burst Mode® during idle periods. Use Value: Delivers 3A pulsed current for laser activation while sustaining 50mA active decode current with <55μA no-load draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2918DJ-LF-Z | 2.5A max output, 2.5–5.5V input, fixed 500kHz frequency, no Burst Mode, 12-lead QFN | Lacks programmable frequency and low-noise Burst Mode; suited for cost-sensitive, fixed-frequency industrial modules. | Choose MP2918DJ-LF-Z when design prioritizes BOM simplicity over light-load efficiency or EMI flexibility. |
| TPS63020DSJR | 2A max output, 1.8–5.5V input, 2.4MHz fixed frequency, integrated compensation, 10-lead WSON | Lower current rating and no RT-programmability; includes automatic mode transition but higher quiescent current (30μA vs <1μA shutdown). | Choose TPS63020DSJR when footprint and ease of use outweigh need for 3A output and ultra-low shutdown IQ. |
Compared with MP2918DJ-LF-Z and TPS63020DSJR, the LTC3113EDHD#TRPBF uniquely delivers 3A continuous output with programmable frequency, <1μA shutdown, and Burst Mode®-making it the only option among the three capable of sustaining high-pulse loads in battery-critical portable instrumentation.
Availability
LTC3113EDHD#TRPBF is available at Aetrix Electronics and suitable for wireless modems, backup power systems, and portable instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for LTC3113EDHD#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. (including legacy Linear Technology products) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision, industrial, automotive, and communications markets.
The LTC3113 product line delivers high-efficiency, low-noise buck-boost conversion for applications where input voltage may vary above or below the required output-designed specifically for portable, battery-powered, and RF-sensitive systems demanding reliability and minimal EMI.
FAQ
What is the maximum continuous output current of the LTC3113EDHD#TRPBF?
The LTC3113EDHD#TRPBF delivers up to 3A continuous output current when VIN > 3.0V and VOUT = 3.8V in PWM mode. At lower input voltages (e.g., VIN ≥ 1.8V, VOUT = 3.3V), the rated continuous output drops to 1.5A. Burst Mode® operation further reduces maximum sustainable load to approximately 1.2A depending on VIN/VOUT and efficiency-full 3A capability is exclusive to fixed-frequency PWM mode.
Does the LTC3113EDHD#TRPBF support output voltages below 1.8V?
No, the LTC3113EDHD#TRPBF does not support output voltages below 1.8V. Its specified output voltage adjust range is strictly 1.8V to 5.5V, as defined by the internal 600mV feedback reference and absolute maximum ratings. Attempting to program VOUT < 1.8V violates the device's electrical specifications and may result in regulation failure or undefined behavior. For sub-1.8V outputs, a different converter such as the LTC3536 should be evaluated.
How is switching frequency programmed on the LTC3113EDHD#TRPBF?
Switching frequency on the LTC3113EDHD#TRPBF is programmed using an external resistor (RT) connected from Pin 8 (RT) to SGND. The relationship is given by RT ≅ 90 / fMHz kΩ-for example, a 90.9kΩ resistor sets f ≈ 1MHz. Frequency range is 300kHz to 2MHz; values outside this range cause out-of-spec operation. The RT pin voltage must remain below 1V, and resistor tolerance directly impacts frequency accuracy (±20% typical).
What thermal considerations apply to the LTC3113EDHD#TRPBF DFN package?
The LTC3113EDHD#TRPBF uses a 16-lead DFN with an exposed PGND pad (Pin 17) that serves as the primary thermal path. To maintain junction temperature ≤125°C, the pad must be fully soldered to a minimum 200mm² copper area with ≥4 thermal vias (0.3mm diameter) connecting to inner/ground planes. θJA = 36.5°C/W assumes this layout; omitting vias or undersized copper raises thermal resistance by >50%, risking thermal shutdown under 2A+ loads.
Can the LTC3113EDHD#TRPBF operate with input voltage below 1.8V?
No, the LTC3113EDHD#TRPBF has a minimum input voltage of 1.8V per its Absolute Maximum Ratings and Electrical Characteristics. Operation below 1.8V triggers undervoltage lockout (UVLO), disabling the device. The typical UVLO turn-on threshold is 1.7V, and hysteresis ensures clean restart-but sustained operation below 1.8V is not supported. For sub-1.8V inputs, consider the LTC3115 or similar ultralow-VIN boost converters.
LTC3113EDHD#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):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 300kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x4)
LTC3113EDHD#TRPBF FAQ
1.How can I place an order for LTC3113EDHD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3113EDHD#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 LTC3113EDHD#TRPBF reliable?
The price and inventory of LTC3113EDHD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3113EDHD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3113EDHD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3113EDHD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3113EDHD#TRPBF?
LTC3113EDHD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3113EDHD#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 LTC3113EDHD#TRPBF?
For technical support, including LTC3113EDHD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3113EDHD#TRPBF requirements.
6.How does Aetrix verify that LTC3113EDHD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3113EDHD#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 LTC3113EDHD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3113EDHD#TRPBF?
All LTC3113EDHD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3113EDHD#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 LTC3113EDHD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3113EDHD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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