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Analog Devices Inc. LTC3113EDHD#PBF
- Part No.:
- LTC3113EDHD#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3113EDHD#PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 3A 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,661
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Product details
Overview
LTC3113EDHD#PBF 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/output voltage range of 1.8V–5.5V, fixed-frequency PWM or selectable Burst Mode operation, and low-noise architecture optimized for RF and precision instrumentation. It integrates dual N-channel and dual P-channel MOSFETs in a thermally enhanced 16-lead DFN package.
For engineers reviewing the LTC3113EDHD#PBF datasheet, LTC3113EDHD#PBF pinout, LTC3113EDHD#PBF application, or LTC3113EDHD#PBF equivalent, key selection criteria include its 3A output capability at VIN > 3.0V/VOUT = 3.8V, programmable 300kHz–2MHz switching frequency, <1μA shutdown current, integrated soft-start, and support for seamless buck/buck-boost/boost mode transitions without inductor current discontinuity.
Technical Context
The LTC3113EDHD#PBF implements a proprietary four-switch synchronous buck-boost topology with voltage-mode control, enabling regulation when VIN is above, below, or equal to VOUT. Its error amplifier drives VC to modulate duty cycles across SW1 and SW2 terminals, while internal gate drivers prevent shoot-through via anticross-conduction logic.
It features dual current limiting: an average input current limit (7.8A typ.) enforced via FB pin injection, and a fast peak current limit (11.1A typ.) for hard short protection. Reverse current limiting (–1.0A typ.) activates on switch D 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, USB, and multi-rail systems without pre-regulation |
| Output Current (Continuous) | 3A at VIN > 3.0V, VOUT = 3.8V - sufficient for high-power portable instrumentation loads |
| Switching Frequency | Programmable 300kHz–2MHz via RT resistor - enables optimization of size vs. EMI vs. efficiency |
| Feedback Reference Voltage | 600mV ±2% - sets output via resistor divider; allows 1.8V–5.5V adjustable VOUT |
| Shutdown Current | <1μA - preserves battery life in always-on backup power and wireless modem standby |
| Efficiency | Up to 96% - minimizes thermal stress and extends runtime in space-constrained portable designs |
| Operating Junction Temp | –40°C to 125°C - qualified for industrial and automotive-adjacent embedded applications |
Pinout & Package
Package: 16-lead (5mm × 4mm × 0.75mm) plastic DFN with exposed PGND pad (Pin 17), thermally enhanced for high-current operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pins 1, 2) | Buck-boost output node | Connects to output capacitor bank; must use low-ESR ceramic capacitors placed adjacent to pins |
| VIN (Pins 3, 4, 5) | Power input supply | Accepts 1.8V–5.5V; requires ≥47μF bulk bypass directly to PGND with minimal loop area |
| SGND (Pin 6) | Signal ground reference | Reference point for RT, FB, VC compensation network; isolated from PGND to reduce noise coupling |
| BURST (Pin 7) | Mode selection control | Low = fixed-frequency PWM (full 3A); high = Burst Mode (low-noise, reduced max load) |
| RT (Pin 8) | Oscillator frequency programming | Resistor-to-SGND sets fSW: RT ≈ 90/fMHz kΩ (e.g., 90.9kΩ = 1MHz) |
| VC (Pin 9) | Error amplifier output | Drives compensation network (R-C from VC to FB); determines loop stability and transient response |
| FB (Pin 10) | Feedback input | Monitors VOUT via resistor divider; 600mV reference enables precise output regulation |
| RUN (Pin 11) | Enable/disable control | Active-high logic; <0.3V = shutdown (<1μA IQ), >1.2V = enabled |
| SW1 (Pins 12, 13, 14) | Switch node A/B connection | Internal NMOS (B) and PMOS (A) switches; connects to one end of power inductor |
| SW2 (Pins 15, 16) | Switch node C/D connection | Internal NMOS (C) and PMOS (D) switches; connects to other end of power inductor |
| PGND (Exposed Pad) | Power ground return | Thermal and electrical ground path; must be soldered to large PCB copper area for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor 4-switch architecture | Eliminates need for separate buck + boost stages; reduces BOM count and board area by ~40% vs. cascaded solutions |
| Seamless mode transition | Maintains continuous inductor current across buck → buck-boost → boost regions; avoids output voltage glitches and loop instability |
| Integrated low-RDS(ON) MOSFETs | PMOS A/D: 30–40mΩ typ., NMOS B/C: 25–35mΩ typ. - enables high efficiency without external FETs or gate drivers |
| Output disconnect in shutdown | Prevents backfeed from VOUT to VIN during disable - critical for battery-backed systems and hot-swap applications |
| Thermal shutdown & UVLO | 155°C trip / 145°C restart and 1.6V UVLO with hysteresis - protects against sustained overtemperature and brownout-induced cycling |
Applications
| Wireless Modems | Backup Power Systems |
|---|---|
Use Scenario: LTE/5G modem modules requiring stable 3.3V or 3.8V rail from variable Li-ion battery (3.0–4.2V). IC Role / Device Role / Timing Role: Primary buck-boost regulator maintaining regulated output as battery discharges below VOUT. Use Value: Delivers full 3A output in PWM mode during data transmission bursts; Burst Mode cuts quiescent current to <1μA during idle, extending standby time. | Use Scenario: Industrial PLCs with supercapacitor-based backup where main 5V rail fails unexpectedly. IC Role / Device Role / Timing Role: Bidirectional voltage regulator that accepts 1.8–5.5V input and delivers regulated 3.3V/3.8V output regardless of source polarity or level. Use Value: Maintains clean, low-noise output during switchover; reverse current limit prevents supercapacitor discharge into failed main rail. |
| Portable Instrumentation | Portable Barcode Readers |
Use Scenario: Handheld multimeters or spectrum analyzers powered by single-cell Li-ion with analog front-end requiring ultra-low ripple. IC Role / Device Role / Timing Role: Low-noise power supply generating precision 3.8V rail for ADC references and RF sections. Use Value: Fixed-frequency PWM mode ensures predictable EMI spectrum; integrated soft-start prevents inrush-induced measurement offset. | Use Scenario: Ruggedized handheld scanners using 3.3V logic and laser diode drivers, operating across 2.5–4.5V battery range. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete buck + boost converters to meet tight height constraints (<1.0mm profile). Use Value: 16-lead DFN package (4mm × 5mm) reduces footprint by >50% vs. TSSOP alternatives; thermal pad sustains 3A load without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Lower max output current (2.5A), fixed 2.5MHz fSW, no programmable frequency; uses different control scheme (current-mode) | Limited to ≤2.5A loads; less flexible for EMI-sensitive RF applications requiring frequency tuning | Choose for cost-sensitive, lower-current portable devices where 2.5A suffices and fixed frequency is acceptable |
| MAX77827AEWI+T | Higher input range (2.5V–16V), 3.5A output, but larger 20-pin WLP package; lacks Burst Mode, higher IQ in light-load operation | Better suited for wide-input industrial sensors; not ideal for battery-powered devices needing sub-μA shutdown | Choose when input exceeds 5.5V or when higher output current margin is required, accepting larger size and higher light-load IQ |
Compared with TPS63020DSJR and MAX77827AEWI+T, the LTC3113EDHD#PBF uniquely combines 3A output, programmable 300kHz–2MHz switching, <1μA shutdown, and true seamless mode transition-making it optimal for high-performance portable instrumentation and RF-modem power rails where noise, efficiency, and dynamic input range are critical.
Availability
LTC3113EDHD#PBF is available at Aetrix Electronics and suitable for wireless modems, backup power systems, and portable instrumentation requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across temperature.
Supply support for LTC3113EDHD#PBF 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 LTC3113EDHD#PBF belongs to ADI's Power by Linear™ family of high-efficiency DC/DC converters, designed specifically for demanding portable, RF, and precision measurement applications where input voltage variability and low noise are critical constraints.
FAQ
What is the maximum continuous output current supported by the LTC3113EDHD#PBF?
The LTC3113EDHD#PBF delivers up to 3A continuous output current when VIN > 3.0V and VOUT = 3.8V. At lower input voltages (e.g., VIN ≥ 1.8V, VOUT = 3.3V), it supports 1.5A continuously. Peak current capability reaches 11.1A, but sustained operation above 3A requires careful thermal design and is limited by junction temperature rise. The LTC3113EDHD#PBF datasheet specifies these values under defined test conditions with proper PCB layout and thermal management.
Does the LTC3113EDHD#PBF support output voltages outside the 1.8V–5.5V range?
No-the LTC3113EDHD#PBF is specified for output voltage adjustment strictly between 1.8V and 5.5V, set via the FB pin resistor divider using the formula VOUT = 0.600 × (1 + R2/R1). Attempting to program outside this range violates the internal feedback reference and may result in regulation failure or excessive error amplifier saturation. The LTC3113EDHD#PBF's absolute maximum ratings also cap VIN and VOUT at 6V DC, further constraining usable range.
How does Burst Mode operation affect the maximum load current of the LTC3113EDHD#PBF?
In Burst Mode (BURST pin high), the LTC3113EDHD#PBF reduces switching frequency and delivers energy in discrete pulses, lowering light-load efficiency but capping maximum output current. For example, with IPK = 0.9A (Burst Mode peak limit), VIN = 3.3V, VOUT = 3.8V, and η ≈ 90%, IMAX ≈ 0.9 × (3.3/(3.3+3.8)) × 0.9 ≈ 370mA. Exceeding this causes output droop. The LTC3113EDHD#PBF automatically reverts to PWM mode if load demand surpasses Burst Mode capability.
What is the purpose of the SGND pin on the LTC3113EDHD#PBF, and how should it be routed?
The SGND (Signal Ground) pin on the LTC3113EDHD#PBF serves as the dedicated low-noise reference for the feedback divider, RT resistor, and VC compensation network. It must be separated from PGND (power ground) and connected only to the analog ground plane near FB, RT, and VC. Routing noisy PGND currents through SGND degrades regulation accuracy and loop stability. The LTC3113EDHD#PBF datasheet mandates star-point grounding at the IC to preserve 600mV reference integrity and minimize offset errors.
Can the LTC3113EDHD#PBF operate with input voltages below 1.8V?
No-the LTC3113EDHD#PBF has a minimum specified input voltage of 1.8V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 1.8V triggers undervoltage lockout (UVLO) at ~1.6V (typical), disabling all switching and forcing shutdown. Even brief dips below 1.8V risk cycling into and out of UVLO under load, causing instability. The LTC3113EDHD#PBF is not rated or characterized for sub-1.8V operation, and doing so may impair reliability or cause functional failure.
LTC3113EDHD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC3113EDHD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3113EDHD#PBF 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#PBF reliable?
The price and inventory of LTC3113EDHD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3113EDHD#PBF is usually 5 days.
3.What payment methods are accepted for LTC3113EDHD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3113EDHD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3113EDHD#PBF?
LTC3113EDHD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3113EDHD#PBF 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#PBF?
For technical support, including LTC3113EDHD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3113EDHD#PBF requirements.
6.How does Aetrix verify that LTC3113EDHD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3113EDHD#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3113EDHD#PBF?
All LTC3113EDHD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3113EDHD#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC3113EDHD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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