LTC3807IFE#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
The LTC3807IFE#PBF is an automotive-grade single-output synchronous step-down DC/DC controller from Analog Devices, operating from 4V to 38V input with a programmable output voltage range of 0.8V to 24V at 750 kHz switching frequency. It uses current-mode PWM control for fast transient response and accurate current limiting in a 20-pin TSSOP with exposed pad package. Qualified for automotive applications requiring a wide input range and compact surface-mount form factor.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- LTC3807IFE#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.9300(MOQ 1)
- 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 LTC3807IFE#PBF?
- 4V to 38V input range covers 12V automotive battery, 24V truck bus, and cold-crank transients down to 4V without undervoltage lockout interruption
- Programmable output voltage from 0.8V to 24V via external resistor divider serves a wide range of load voltage requirements from DDR memory rails to 12V system buses
- Current-mode PWM control at 750 kHz provides inherent cycle-by-cycle current limiting and fast load transient response without external slope compensation
- Automotive-grade qualification supports operation across the full -40°C to 125°C junction temperature range required by AEC-Q100 compliant designs
- 20-pin TSSOP with exposed thermal pad minimizes package thermal resistance, enabling higher output current without external heatsinking in automotive underhood environments
What is LTC3807IFE#PBF used for?
The LTC3807IFE#PBF is designed for automotive ECU power trees, ADAS processor boards, and infotainment systems requiring a regulated low-voltage rail from the 12V or 24V vehicle bus across cold-crank and load-dump transients. Its 0.8V to 24V adjustable output enables a single controller design to serve multiple rail voltages including 1V core, 1.8V I/O, 3.3V logic, and 5V peripheral rails. The device also suits industrial power supplies and server infrastructure power stages where a high-frequency synchronous buck controller with precise current limiting is needed from a 4V to 38V input source.
What are the specifications of LTC3807IFE#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1663 (CB) |
| YTEOL | 10 |
| Additional Feature | OUTPUT VOLTAGE RANGE FROM 0.8 V TO 24 V |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 38V |
| Input Voltage-Min | 4V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | 24V |
| Output Voltage-Min | 0.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 900kHz |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| 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 LTC3807IFE#PBF datasheet?
LTC3807IFE#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC3807IFE#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the LTC3807IFE#PBF handle automotive cold-crank and load-dump transients on a 12V vehicle bus?
The LTC3807IFE#PBF operates continuously from 4V input, so during a cold-crank event where the 12V battery may sag to 5V or 6V, the controller maintains regulation without undervoltage lockout tripping. For load-dump transients that push the bus above 36V, the 38V maximum input rating provides 2V of headroom above the ISO 7637-2 pulse 5a level, and the current-mode control loop responds within 1µs to suppress output overshoot during the transient. An external TVS clamp on the input is still recommended for full load-dump compliance above 38V.
What output voltage range does the LTC3807IFE#PBF support, and how is the output voltage set?
The LTC3807IFE#PBF produces output voltages from 0.8V to 24V, set by an external resistor divider connected from the output to the FB pin referenced to an internal 0.8V reference. Changing the two resistor values programs any output between 0.8V and 24V without requiring a different controller IC, allowing a single LTC3807IFE#PBF design to be reused across multiple product power rails by adjusting two 1% resistors. For a 3.3V output, a 30.9kΩ top resistor and 10kΩ bottom resistor produce the target voltage with less than 1% error at room temperature.
How does current-mode control at 750 kHz benefit the output filter design compared to a voltage-mode controller at the same frequency?
Current-mode control in the LTC3807IFE#PBF makes the inductor current a first-order state variable, effectively converting the second-order LC output filter into a first-order system for the feedback loop. This simplifies compensation to a single-pole Type II network and allows the crossover frequency to be set as high as 150 kHz at 750 kHz switching frequency, delivering a transient response settling time under 10µs for a 10A load step. Current-mode control also provides inherent cycle-by-cycle peak inductor current limiting at each 1.33µs switching period without requiring a separate overcurrent sense comparator.
For an automotive design targeting AEC-Q100 Grade 1 compliance, what temperature range does the LTC3807IFE#PBF cover?
The LTC3807IFE#PBF is an automotive-grade device rated for operation from -40°C to 125°C junction temperature, matching the AEC-Q100 Grade 1 temperature range required for underhood automotive applications. This covers ambient temperatures from -40°C cold start to 105°C underhood environments with normal junction self-heating margins. The 20-pin TSSOP exposed-pad package reduces thermal resistance from junction to board, helping the device stay within its 125°C junction limit at full switching current in high-ambient-temperature automotive environments.
Which external components are critical to sizing correctly when designing with the LTC3807IFE#PBF at 750 kHz?
At 750 kHz switching frequency, the output inductor should be sized for approximately 30-40% peak-to-peak current ripple, typically 1µH to 4.7µH for a 5V to 1.8V conversion at 10A output, depending on duty cycle. The output capacitor needs a capacitance of 100µF to 470µF with low ESR below 5 milliohms to limit output voltage ripple below 20mV and absorb load transients without exceeding the control loop bandwidth. The bootstrap capacitor on the BOOST pin should be 100nF rated for at least 16V to ensure reliable high-side gate drive turn-on at the 750 kHz switching rate.
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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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| 1+ | $9.5000 | $9.50 |
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