LTC3115EFE-2#TRPBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LTC3115EFE-2#TRPBF is an automotive-grade synchronous buck-boost DC-DC converter accepting 2.7 V to 40 V input and delivering a regulated 2.7 V to 40 V output at up to 0.8 A. Using voltage-mode PWM control, it operates seamlessly across step-down and step-up modes in a 20-pin TSSOP exposed-pad package for automotive and industrial power management.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- LTC3115EFE-2#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $7.5900(MOQ 19)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC3115EFE-2#TRPBF?
- 2.7 V to 40 V input and output range enabling seamless buck-boost conversion through automotive load-dump transients up to 40 V
- Synchronous switching topology with voltage-mode PWM achieving high efficiency at 0.8 A output current with minimal external component count
- Automotive-grade rated operation covering cold-crank (down to 2.7 V) through load-dump (up to 40 V) supply scenarios
- Adjustable output voltage from 2.7 V to 40 V via external resistor divider for flexible point-of-load regulation without fixed-voltage variants
- 20-pin TSSOP exposed-pad package improving thermal dissipation at 0.8 A continuous output for compact automotive PCB layouts
What is LTC3115EFE-2#TRPBF used for?
The LTC3115EFE-2#TRPBF is designed for automotive systems where the supply voltage fluctuates widely between cold-crank conditions at 2.7 V and load-dump transients at 40 V, requiring a converter that maintains regulated output across the entire range without interruption. It powers automotive infotainment modules, telematics control units, and ADAS sensor rails that demand stable 5 V or 12 V from an unstable 12 V lead-acid battery bus. Industrial applications including 24 V bus-powered instrumentation, PLCs, and field sensors also benefit from its wide input range, single-inductor topology, and adjustable output voltage for flexible point-of-load regulation.
What are the specifications of LTC3115EFE-2#TRPBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1663 (CA) |
| YTEOL | 10 |
| Additional Feature | ALSO OPERATES IN ADJUSTABLE MODE FROM 2.7V TO 40V |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 2.7V |
| Input Voltage-Nom | 24V |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 2A |
| Output Voltage-Max | 40V |
| Output Voltage-Min | 2.7V |
| Output Voltage-Nom | 4.45V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP20,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 2000kHz |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Where can I find the LTC3115EFE-2#TRPBF datasheet?
LTC3115EFE-2#TRPBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC3115EFE-2#TRPBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the LTC3115EFE-2's buck-boost topology maintain output regulation when automotive battery voltage drops below the output setpoint during cold crank?
The LTC3115EFE-2 uses a 4-switch synchronous buck-boost topology that transitions smoothly from buck mode when input exceeds output, through a combined mode at near-equal voltages, to full boost mode when input falls below the regulated output. During automotive cold-crank events where the 12 V lead-acid bus can sag to 2.7 V, the converter boosts to maintain a regulated 5 V or 3.3 V output at up to 0.8 A without the glitches or dropout that occur with separate buck and boost stage designs.
What input voltage transients can the LTC3115EFE-2 survive, and why does that matter for 12 V automotive bus applications?
The LTC3115EFE-2 handles input voltages from 2.7 V to 40 V, making it tolerant of ISO 7637 automotive load-dump transients that can reach 36–40 V on 12 V nominal systems when inductive loads are suddenly disconnected. Without a converter rated to 40 V input, a load dump can destroy the power supply IC and downstream loads; the LTC3115EFE-2's 40 V input maximum provides a design margin of approximately 0 V below the 40 V clamp level that most automotive transient suppressors enforce.
How is the output voltage of the LTC3115EFE-2 configured, and what resistor values produce a regulated 5 V output from a 12 V nominal input?
The LTC3115EFE-2 sets output voltage through an external resistor divider from VOUT to the FB pin, with an internal 0.8 V reference. For a 5 V output, the ratio requires (VOUT/VREF - 1) = (5/0.8 - 1) = 5.25, so choosing a bottom resistor of 10 kΩ and a top resistor of 52.3 kΩ (nearest 1% standard value) programs the output to 5.0 V. The 2.7 V to 40 V input range means this 5 V output remains regulated whether the 12 V battery sags to cold-crank minimums or swings to 40 V load-dump peaks, covering the full automotive operating envelope.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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