My Inquiry
My Account
Analog Devices Inc. LTC3807EFE#PBF
- Part No.:
- LTC3807EFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3807EFE#PBF.pdf
- Description:
- IC REG CTRLR BUCK 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,628
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3807EFE#PBF from Analog Devices (formerly Linear Technology) is a high-performance, low-quiescent-current synchronous step-down DC/DC controller driving all-N-channel MOSFETs. It supports 4V–38V input, 0.8V–24V output, 50μA no-load IQ, and phase-lockable switching up to 750kHz - enabling efficient 12V/10A conversion in battery-powered digital systems.
For engineers reviewing the LTC3807EFE#PBF datasheet, LTC3807EFE#PBF pinout, LTC3807EFE#PBF application, or LTC3807EFE#PBF equivalent, key selection criteria include its Burst Mode® operation for ultra-low IQ, OPTI-LOOP® compensation for wide capacitor/ESR tolerance, selectable light-load modes (Burst/Pulse-Skip/Forced CCM), and 20-pin TSSOP package with exposed thermal pad.
Technical Context
The LTC3807EFE#PBF implements constant-frequency current-mode control with an internal transconductance error amplifier (gm = 2 mmho) and precision 0.8V reference (±0.8% over –40°C to 125°C). Its dual LDO architecture powers INTVCC from either VIN (4.85–5.35V) or EXTVCC (switchover at 4.7V), supporting high-efficiency self-biasing from the regulated output.
Light-load behavior is programmable via PLLIN/MODE: grounding selects Burst Mode® (50μA IQ), tying to INTVCC forces continuous conduction, and applying 1.2V–(INTVCC–1.3V) enables pulse-skipping. Current sensing supports RSENSE or DCR methods, with three ILIM-selectable thresholds (22/43/64 mV typ) and foldback protection during short circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 38V - supports wide intermediate bus and multi-cell battery inputs without external regulators. |
| Output Voltage Range | 0.8V to 24V - programmable via external resistor divider; enables direct 3.3V, 5V, 8.5V, or 12V regulation. |
| No-Load Quiescent Current | 50μA in Burst Mode® - extends runtime in always-on battery systems like automotive infotainment or IoT sensors. |
| Switching Frequency | 75kHz to 750kHz (phase-lockable) - allows EMI optimization and compact magnetics design. |
| Reference Voltage Accuracy | ±0.8% (0.792V–0.808V) over –40°C to 125°C - ensures stable output regulation across industrial temperature range. |
| Gate Driver Strength | TG/BG pull-up: 2.5Ω/2.4Ω; pull-down: 1.5Ω/1.1Ω - drives large N-channel MOSFETs with fast rise/fall times (≤25ns). |
| Power Good Threshold | VFB ±10% trip level with 2.5% hysteresis - provides reliable system power sequencing and fault detection. |
Pinout & Package
Package: 20-lead plastic TSSOP (FE package) with exposed thermal pad (Pin 21 = SGND), rated for –40°C to 125°C operating junction temperature (θJA = 38°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TRACK/SS (Pin 1) | Soft-start & tracking control input | Internal 10µA pull-up charges external capacitor for linear VOUT ramp; accepts resistor divider for supply tracking. |
| FREQ (Pin 2) | Oscillator frequency programming | 20µA internal pull-up sets VCO voltage; resistor-to-GND programs 50–900kHz; GND/INTVCC selects fixed 350/535kHz. |
| PLLIN/MODE (Pin 3) | Light-load mode & sync input | Selects Burst Mode® (GND), pulse-skip (1.2V–INTVCC–1.3V), or forced CCM (INTVCC); accepts external clock for synchronization. |
| RUN (Pin 6) | Enable/shutdown control | 1.16V threshold disables control loop; 0.7V threshold shuts down entire IC (IQ = 14µA); 7µA internal pull-up enables floating use. |
| SENSE– / SENSE+ (Pins 7/8) | Differential current sense inputs | Supports RSENSE or DCR sensing; common-mode range up to 28V; bias current <±2µA minimizes sensing error. |
| VFB (Pin 9) | Feedback voltage input | Compares output divider voltage to 0.8V reference; ±5nA input current enables high-impedance dividers. |
| ITH (Pin 10) | Error amplifier output & compensation node | Controls peak inductor current; connects to RC/CC network for OPTI-LOOP® compensation across wide capacitor ESR ranges. |
| PGOOD (Pin 11) | Open-drain power-good indicator | Pulls low when VFB deviates >±10% from setpoint; 2mA sink capability drives logic or microcontroller interrupt. |
| TG (Pin 12) | Top N-MOSFET gate driver | Floating driver with BOOST-referenced swing; 2.5Ω pull-up/1.5Ω pull-down drives high-side FET efficiently. |
| SW (Pin 13) | Switch node connection | Connects to inductor and BOOST capacitor; handles high dv/dt; must be routed with minimal parasitic inductance. |
| BOOST (Pin 14) | Bootstrap supply for top driver | Capacitor between BOOST and SW supplies floating gate drive; diode from BOOST to INTVCC maintains charge. |
| BG (Pin 15) | Bottom N-MOSFET gate driver | Ground-referenced driver (0V–INTVCC swing); 2.4Ω pull-up/1.1Ω pull-down enables fast synchronous rectification. |
| INTVCC (Pin 16) | Internal LDO output (5.1V) | Powers drivers and analog circuitry; requires ≥2.2µF ceramic decoupling to PGND; not for external loads. |
| EXTVCC (Pin 17) | External bias input for INTVCC LDO | Enables high-efficiency self-biasing from regulated output (e.g., VOUT); switchover at 4.7V; clamp limits to 14V max. |
| PGND (Pin 18) | Power ground return | Connects to source of bottom FET and CIN (–) terminal; separate from SGND to avoid noise coupling into control loop. |
| VIN (Pin 19) | Main input supply | Accepts 4V–38V; requires local ceramic bypass (≥10µF) to SGND pins; absolute max 40V. |
| ILIM (Pin 20) | Current limit threshold select | GND/FLOAT/INTVCC selects max sense voltage: 22/43/64mV typ - scales current limit without changing RSENSE. |
| SGND (Pins 2,4,5,21) | Small-signal ground | Mandatory star-point connection for VFB, ITH, TRACK/SS, and feedback resistors; isolated from PGND and power paths. |
Key Features
| Feature | Design Value |
|---|---|
| OPTI-LOOP® Compensation | Allows stable loop response across wide output capacitor values (2.2µF–1000µF) and ESR ranges (0.5mΩ–100mΩ) without redesign. |
| Burst Mode® Operation | Reduces no-load IQ to 50μA while maintaining tight output regulation - critical for >1-year battery life in standby systems. |
| Programmable Light-Load Modes | Three distinct behaviors (Burst/Pulse-Skip/Forced CCM) selected by single pin - enables trade-off between efficiency, ripple, and EMI. |
| 99% Maximum Duty Cycle | Supports ultra-low dropout operation (e.g., 12V→11.8V at high load), minimizing heat dissipation in high-VIN, low-VOUT applications. |
| Output Overvoltage Protection | Hardware-based OVP triggers shutdown if VFB exceeds setpoint by >13%, protecting downstream loads without software intervention. |
| DCR or RSENSE Sensing | Eliminates current-sense resistor losses; compatible with low-ESR polymer or multilayer inductors using integrated DCR networks. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Powering FPGA, DSP, and display controllers in vehicle head units with 12V battery input and strict 50μA sleep current budget. IC Role / Device Role / Timing Role: Primary synchronous buck controller regulating 3.3V/5V rails; manages soft-start sequencing and PGOOD handshaking with MCU. Use Value: Burst Mode® achieves 50μA IQ, extending battery reserve time; OPTI-LOOP® tolerates aging electrolytic bulk capacitors over 10+ year service life. |
Use Scenario: Generating isolated 24V-to-5V/3.3V supplies for sensor interface and communication ICs in factory automation cabinets. IC Role / Device Role / Timing Role: High-efficiency step-down controller driving discrete N-MOSFETs; supports wide input (18–36V) and precise output regulation. Use Value: 4V–38V input range accommodates brownout conditions; 0.8V reference accuracy (±0.8%) ensures ADC reference stability across temperature. |
| Portable Medical Monitor | Distributed Telecom Power |
|
Use Scenario: Battery-backed 12V/10A main rail for portable ultrasound and ECG devices requiring low-noise, long-runtime operation. IC Role / Device Role / Timing Role: High-current synchronous controller with programmable frequency (350kHz/535kHz) to avoid sensitive RF bands. Use Value: Phase-lockable 75–750kHz operation enables synchronized switching across multiple rails, reducing conducted EMI peaks. |
Use Scenario: Intermediate bus converter in 48V telecom systems powering point-of-load regulators for ASICs and FPGAs. IC Role / Device Role / Timing Role: Wide-input (36–57V) buck controller with EXTVCC self-biasing from 12V output, improving overall system efficiency. Use Value: EXTVCC LDO switchover at 4.7V enables >90% efficiency at full load by eliminating VIN-to-INTVCC linear drop losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8610EMSE#PBF | Monolithic 3.5A buck regulator (integrated MOSFETs); 2.8V–30V input; 3.5µA quiescent current in Silent Switcher® mode. | Lower current rating (3.5A vs 10A+); no external MOSFET flexibility; superior EMI performance but limited output voltage range (0.6V–25V). | Choose LT8610EMSE#PBF for space-constrained, low-EMI designs needing ≤3.5A; retain LTC3807EFE#PBF for higher current, thermal-flexible, or cost-optimized discrete-FET solutions. |
| TPS53355DQPR | TI 30A synchronous buck controller; 4.5V–25V input; 100μA IQ in Eco-mode; supports VR12.5/IMVP7 protocols. | Higher integration (integrated drivers, PMBus); narrower input range; lacks Burst Mode® and OPTI-LOOP®; optimized for CPU/GPU VRMs. | Choose TPS53355DQPR for high-current server/desktop VRM compliance; LTC3807EFE#PBF remains preferred for wide-input industrial/battery systems requiring ultra-low IQ and flexible compensation. |
Compared with LT8610EMSE#PBF and TPS53355DQPR, the LTC3807EFE#PBF uniquely balances ultra-low 50μA Burst Mode® IQ, 4V–38V input flexibility, and OPTI-LOOP® adaptive compensation - making it optimal for long-life, wide-range, thermally managed industrial and automotive power designs.
Availability
LTC3807EFE#PBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC modules, portable medical monitors, and distributed telecom power supplies requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for LTC3807EFE#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 acquired Linear Technology in 2017, inheriting its legacy of high-performance analog and power management ICs with rigorous automotive and industrial qualification.
The LTC3807EFE#PBF belongs to Linear's high-efficiency synchronous controller product line, designed specifically for wide-input, low-IQ, and thermally demanding applications in automotive, industrial, and battery-powered systems.
FAQ
What is the maximum output voltage supported by the LTC3807EFE#PBF?
The LTC3807EFE#PBF supports an output voltage range of 0.8V to 24V, set by an external resistor divider on the VFB pin. Its internal 0.8V reference and robust error amplifier enable accurate regulation across this full range, including high-voltage rails like 12V or 24V used in industrial and automotive subsystems. The LTC3807EFE#PBF maintains ±0.8% reference accuracy over –40°C to 125°C.
How does the LTC3807EFE#PBF achieve ultra-low quiescent current in battery applications?
The LTC3807EFE#PBF achieves 50μA no-load quiescent current in Burst Mode® operation - enabled by grounding the PLLIN/MODE pin. In this mode, internal circuitry is selectively disabled during light-load idle periods while maintaining output regulation via capacitor hold-up. The LTC3807EFE#PBF also offers 14μA shutdown current when the RUN pin is pulled below 0.7V, further extending battery life in deep-sleep states.
Can the LTC3807EFE#PBF be synchronized to an external clock, and how is it configured?
Yes, the LTC3807EFE#PBF supports external clock synchronization via the PLLIN/MODE pin. Applying a clean CMOS/TTL clock signal (75kHz–750kHz) to this pin locks the internal oscillator's rising edge to the external clock's rising edge, forcing forced continuous conduction mode. This eliminates beat frequencies and simplifies EMI filtering in multi-rail systems. The LTC3807EFE#PBF maintains tight phase alignment without requiring additional components.
What thermal considerations apply to the LTC3807EFE#PBF in TSSOP package?
The LTC3807EFE#PBF in 20-lead TSSOP (FE package) has a θJA of 38°C/W. Its exposed pad (Pin 21) must be soldered to a PCB thermal plane for rated performance. At 125°C max junction temperature and 25°C ambient, it can dissipate ~2.6W continuously. For high-power designs, use multiple thermal vias under the pad and minimize trace resistance to SGND. The LTC3807EFE#PBF includes internal thermal shutdown at 150°C (H-grade) or 125°C (E-grade).
Does the LTC3807EFE#PBF support current sensing using inductor DCR, and how is it implemented?
Yes, the LTC3807EFE#PBF supports both RSENSE and DCR current sensing. For DCR sensing, connect the SENSE+ and SENSE– pins across a small RC network (e.g., 10kΩ + 10nF) placed in series with the inductor's DCR. The LTC3807EFE#PBF's differential comparator rejects common-mode noise, and its low input bias current (<±2µA) prevents measurement errors. ILIM pin selection adjusts the sense threshold to match DCR voltage drops.
LTC3807EFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4V ~ 38V
- Frequency - Switching:
- 50kHz ~ 900kHz
- Duty Cycle (Max):
- 99%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable, Frequency Control, Soft Start, Tracking
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LTC3807EFE#PBF FAQ
1.How can I place an order for LTC3807EFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3807EFE#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 LTC3807EFE#PBF reliable?
The price and inventory of LTC3807EFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3807EFE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3807EFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3807EFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3807EFE#PBF?
LTC3807EFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3807EFE#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 LTC3807EFE#PBF?
For technical support, including LTC3807EFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3807EFE#PBF requirements.
6.How does Aetrix verify that LTC3807EFE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3807EFE#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 LTC3807EFE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3807EFE#PBF?
All LTC3807EFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3807EFE#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 LTC3807EFE#PBF part is unused and in its original packaging.
Return procedure for LTC3807EFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3807EFE#PBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
