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Analog Devices Inc. LTC3113EFE#TRPBF
- Part No.:
- LTC3113EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3113EFE#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 3A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:688
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Product details
Overview
LTC3113EFE#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, fixed-frequency operation up to 2MHz, and low-noise PWM/Burst Mode switching-designed for RF power rails and precision portable instrumentation.
For engineers reviewing the LTC3113EFE#TRPBF datasheet, LTC3113EFE#TRPBF pinout, LTC3113EFE#TRPBF application, or LTC3113EFE#TRPBF equivalent, key selection criteria include its 20-lead TSSOP package thermal performance (θJA = 31.5°C/W), programmable oscillator frequency via RT pin, integrated soft-start (2ms), <1μA shutdown current, and ability to regulate VOUT across VIN >, <, or = VOUT.
Technical Context
The LTC3113EFE#TRPBF implements a proprietary four-switch synchronous buck-boost topology with seamless mode transitions between buck, buck-boost, and boost-enabling continuous inductor current and stable loop dynamics across all VIN/VOUT relationships. Its voltage-mode error amplifier (100dB AVOL) drives gate drivers with anti-cross-conduction logic and integrates peak/average current limiting (7.8A avg, 11.1A peak) plus reverse-current protection (–1.0A typical).
Operation supports selectable Burst Mode® (VBURST ≥ 0.7V) for <55μA quiescent current at light loads or forced PWM (VBURST ≤ 0.3V) for full 3A output capability and low-noise fixed-frequency regulation. Thermal shutdown (155°C) and UVLO (1.6V typ.) provide robust system-level protection without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, USB, and multi-chemistry battery inputs without pre-regulation |
| Output Voltage Range | 1.8V to 5.5V - adjustable via FB resistor divider; regulated regardless of VIN relative to VOUT |
| Continuous Output Current | 3A at VIN > 3.0V, VOUT = 3.8V - full load capability only in PWM mode; reduced in Burst Mode |
| Switching Frequency | 300kHz to 2MHz - set by RT resistor; higher frequencies enable smaller magnetics and faster transient response |
| Efficiency | Up to 96% - achieved using integrated 30mΩ PMOS and 25mΩ NMOS power switches with low gate charge |
| Shutdown Current | <1μA - enables long-term battery backup operation with minimal self-discharge |
| Feedback Reference | 600mV ±2% - high-accuracy reference enables tight output regulation (±0.6% typical over temp) |
Pinout & Package
The LTC3113EFE#TRPBF is housed in a thermally enhanced 20-lead plastic TSSOP package (4.4mm × 6.5mm × 1.1mm) with exposed PGND pad (Pin 21) requiring solder connection to PCB ground plane for optimal thermal performance (θJA = 31.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 4,5,6) | Power Input Supply | Accepts 1.8V–5.5V input; requires local 47μF low-ESR ceramic bypass to PGND |
| VOUT (Pins 2,3) | Regulated Output Node | Delivers up to 3A; connects to 100μF output capacitor and feedback divider |
| SW1 (Pins 15,16,17) | High-Side Switch Node A/B | Connects to one end of power inductor; minimized trace length critical for EMI control |
| SW2 (Pins 18,19) | Low-Side Switch Node C/D | Connects to other end of power inductor; forms synchronous buck-boost switching path |
| FB (Pin 13) | Feedback Input | Senses output via resistor divider; 600mV reference sets VOUT = 0.6V × (1 + R2/R1) |
| RT (Pin 9) | Oscillator Frequency Set | Resistor to SGND programs fSW: RT ≈ 90kΩ / fMHz |
| BURST (Pin 8) | Operating Mode Control | High = Burst Mode (low IQ); Low = PWM Mode (full current, low noise) |
| RUN (Pin 14) | Enable/Shutdown Input | Active-high logic; <0.3V disables IC with output disconnect and <1μA draw |
| VC (Pin 12) | Error Amplifier Output | Loop compensation node; connects RC network to FB for stability |
| PGND (Pins 1,10,11,20,21) | Power Ground Return | Exposed pad (Pin 21) must be soldered to large PCB ground plane for thermal and EMI integrity |
Key Features
| Feature | Design Value |
|---|---|
| Four-switch synchronous architecture | Enables seamless buck/buck-boost/boost transitions without inductor current discontinuity or loop instability |
| Integrated power MOSFETs | 30mΩ PMOS (Switch A/D) and 25mΩ NMOS (Switch B/C) reduce conduction loss and eliminate external FET layout complexity |
| Selectably low-noise PWM mode | Fixed-frequency operation with <10mVPP output ripple at 3A load-critical for RF transceiver power supply |
| Programmable soft-start | 2ms internal ramp prevents inrush current and ensures monotonic VOUT rise independent of output capacitance or load |
| Reverse current limiting | –1.0A threshold on Switch D protects against external back-driving of VOUT (e.g., hot-swap or battery backup scenarios) |
| Thermal and fault protection | Auto-restart thermal shutdown (155°C trip), UVLO (1.6V), short-circuit, and overcurrent protection require no external components |
Applications
| Wireless Modems | Portable Barcode Readers |
|---|---|
Use Scenario: Powering LTE/5G modem baseband and RF sections from single-cell Li-ion (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 for transceiver ICs and digital baseband processors. Use Value: Maintains regulation during deep discharge (VIN down to 1.8V) and eliminates need for separate buck + boost stages-reducing BOM count and PCB area. |
Use Scenario: Battery-powered handheld scanners requiring fast wake-up, low standby current, and immunity to voltage sag during motor activation. IC Role / Device Role / Timing Role: Main power converter supplying 3.3V to CMOS image sensor, laser diode driver, and microcontroller. Use Value: Burst Mode delivers <55μA no-load IQ for weeks of shelf life; PWM mode enables instantaneous 3A peak for laser pulse and motor drive. |
| Backup Power Systems | Portable Instrumentation |
Use Scenario: Supercapacitor or secondary battery backup for industrial controllers where main supply may fail unpredictably. IC Role / Device Role / Timing Role: Bidirectional-capable regulator managing energy flow between primary rail and backup storage. Use Value: Reverse current limit prevents uncontrolled discharge of backup source into main system; output disconnect in shutdown isolates backup during system sleep. |
Use Scenario: High-precision handheld multimeters or spectrum analyzers needing ultra-low-noise analog supply rails. IC Role / Device Role / Timing Role: Low-ripple power source for ADC references, op-amp front-ends, and PLL VCOs. Use Value: Fixed-frequency PWM mode achieves <10mVPP ripple and <10μV/√Hz noise floor-preserving ENOB in 16-bit+ measurement systems. |
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 switching, no Burst Mode-uses hysteretic control instead of voltage-mode | Less suitable for RF-sensitive designs due to variable-frequency operation and higher output ripple | Preferred for space-constrained apps where 2.5A suffices and fixed 2.5MHz simplifies EMI filtering |
| MAX20406AATGA+ | Higher integration (integrated inductor option), 4A rating, I²C programmability, but larger solution size and higher cost | Targeted at automotive infotainment and ADAS where diagnostics and fault reporting are required | Chosen when system-level functional safety (ASIL-B) or programmable telemetry justifies added complexity |
Compared with TPS63020DSJR and MAX20406AATGA+, the LTC3113EFE#TRPBF offers superior low-noise PWM operation, precise 600mV reference accuracy, and proven thermal performance in TSSOP-making it optimal for portable instrumentation and wireless modems where signal integrity and battery runtime are co-prioritized.
Availability
LTC3113EFE#TRPBF is available at Aetrix Electronics and suitable for wireless modems, portable barcode readers, and portable instrumentation requiring stable component supply, long-lifecycle availability, and guaranteed traceable sourcing.
Supply support for LTC3113EFE#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, serving industrial, automotive, communications, and healthcare markets.
The LTC3113EFE#TRPBF belongs to ADI's Power by Linear™ family of high-efficiency DC/DC converters, engineered specifically for battery-powered portable equipment demanding wide VIN/VOUT flexibility, low EMI, and extended runtime under dynamic load conditions.
FAQ
What is the maximum continuous output current supported by the LTC3113EFE#TRPBF?
The LTC3113EFE#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 current is 1.5A. Burst Mode operation further reduces available current-maximum burst-mode output depends on VIN, VOUT, and efficiency per IMAX ≅ IPK × VIN/(VIN + VOUT) × η.
Does the LTC3113EFE#TRPBF support output voltages below 1.8V?
No, the LTC3113EFE#TRPBF does not support output voltages below 1.8V. Its feedback reference is fixed at 600mV ±2%, and the datasheet specifies a minimum output voltage of 1.8V across the full operating temperature range. Attempting to program VOUT < 1.8V violates the device's electrical characteristics and may result in regulation failure or undefined behavior.
How is the switching frequency programmed on the LTC3113EFE#TRPBF?
The switching frequency of the LTC3113EFE#TRPBF is set by an external resistor (RT) connected from Pin 9 (RT) to SGND. The relationship is RT ≈ 90kΩ / fMHz. For example, a 90.9kΩ resistor yields ~0.99MHz. Frequency range is 300kHz to 2MHz; values outside this range cause out-of-spec operation or instability.
What thermal considerations apply to the LTC3113EFE#TRPBF in 20-lead TSSOP package?
The LTC3113EFE#TRPBF in TSSOP has θJA = 31.5°C/W and θJC = 4.1°C/W. To maintain safe junction temperature (<125°C), the exposed PGND pad (Pin 21) must be soldered to a minimum 200mm² copper pour connected to inner ground planes via ≥4 thermal vias. Junction temperature rise scales linearly with load current-e.g., at 3A and VOUT = 3.8V, ΔTJ ≈ 45°C above ambient with proper layout.
Can the LTC3113EFE#TRPBF operate with input voltage equal to output voltage?
Yes, the LTC3113EFE#TRPBF is explicitly designed for VIN = VOUT operation-its four-switch buck-boost topology maintains regulation with zero duty-cycle discontinuity. In this condition, the IC operates in "buck-boost" mode with balanced switch timing, achieving >92% efficiency at 3A (e.g., 3.3V IN → 3.3V OUT), confirmed in Typical Performance Characteristics (Fig. G02).
LTC3113EFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-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):
- 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:
- 20-TSSOP-EP
LTC3113EFE#TRPBF FAQ
1.How can I place an order for LTC3113EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3113EFE#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 LTC3113EFE#TRPBF reliable?
The price and inventory of LTC3113EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3113EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3113EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3113EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3113EFE#TRPBF?
LTC3113EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3113EFE#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 LTC3113EFE#TRPBF?
For technical support, including LTC3113EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3113EFE#TRPBF requirements.
6.How does Aetrix verify that LTC3113EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3113EFE#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 LTC3113EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3113EFE#TRPBF?
All LTC3113EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3113EFE#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 LTC3113EFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3113EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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