My Inquiry
My Account
Analog Devices Inc. LTC3807MPFE#TRPBF
- Part No.:
- LTC3807MPFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3807MPFE#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,208
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3807MPFE#TRPBF 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 operates from 4V to 38V input, delivers 0.8V–24V output, supports phase-lockable switching up to 750kHz, and features Burst Mode operation for battery-powered automotive always-on systems.
For engineers reviewing the LTC3807MPFE#TRPBF datasheet, LTC3807MPFE#TRPBF pinout, LTC3807MPFE#TRPBF application, or LTC3807MPFE#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature rating, 50μA no-load IQ, programmable current limit via ILIM pin, OPTI-LOOP® compensation, and precision 0.8V reference with ±0.8% initial accuracy over temperature.
Technical Context
The LTC3807MPFE#TRPBF implements a constant-frequency current-mode control architecture with internal transconductance error amplifier (gm = 2 mmho) and slope compensation. Its dual-mode gate drivers deliver <25ns rise/fall times with 30ns dead-time control, enabling efficient high-side/low-side N-MOSFET switching at up to 99% duty cycle in dropout.
It integrates dual LDOs - one powered from VIN (4.85–5.35V output), another switchover-enabled from EXTVCC (4.5–4.9V threshold) - and supports three light-load operating modes (Burst, pulse-skipping, forced continuous) selected via the PLLIN/MODE pin, with independent current foldback limiting during short-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 38V - supports wide intermediate bus and battery chemistries including 12V/24V automotive systems. |
| Output Voltage Range | 0.8V to 24V - programmable via external resistor divider; enables single-controller flexibility across multiple rail requirements. |
| No-Load Quiescent Current | 50μA - extends runtime in battery-backed applications such as telematics and infotainment standby modes. |
| Switching Frequency Range | 75kHz to 750kHz - phase-lockable to external clock or programmable via FREQ pin resistor (50–900kHz). |
| Reference Voltage Accuracy | ±0.8% (0.792V–0.808V) over –40°C to 85°C - ensures tight output regulation without external trimming. |
| Operating Temperature Range | –55°C to +150°C - qualified for under-hood automotive and industrial harsh-environment deployment. |
| Shutdown Current | 14μA - enables ultra-low-power disable state for system-level energy management. |
Pinout & Package
Package: 20-lead plastic TSSOP with exposed pad (Pin 21 = SGND); rated θJA = 38°C/W; requires soldering of exposed pad to PCB ground for thermal performance.
| 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; enables voltage tracking of master supply during startup. |
| FREQ (Pin 2) | Oscillator frequency programming | 20µA internal pull-up sets VCO voltage; resistor-to-GND selects 50–900kHz; direct tie to GND/INTVCC fixes 350/535kHz. |
| PLLIN/MODE (Pin 3) | Light-load mode selection & sync input | Ground = Burst Mode; INTVCC = forced continuous; 1.2V–(INTVCC–1.3V) = pulse-skipping; external clock = phase-locked operation. |
| RUN (Pin 6) | Enable/shutdown control | 1.16V threshold disables regulation; 0.7V threshold shuts down entire IC, reducing IQ to 14µA; 7µA internal pull-up allows floating for always-on use. |
| SENSE– / SENSE+ (Pins 7, 8) | Differential current sense inputs | Support RSENSE or DCR sensing; common-mode range up to 28V; bias current ≤±2µA minimizes measurement error. |
| VFB (Pin 9) | Feedback voltage input | Compares output divider voltage to 0.8V reference; ±5nA input current enables high-impedance feedback networks. |
| ITH (Pin 10) | Error amplifier output & compensation node | Direct access to transconductance amplifier output; used for loop compensation and current limit setting via external RC network. |
| PGOOD (Pin 11) | Open-drain power-good indicator | Asserts low when VFB deviates >±10% from setpoint; 25µs fault delay prevents false triggering during transients. |
| TG (Pin 12) | Top-gate driver output | Floating driver with 2.5Ω pull-up/pull-down; drives high-side N-MOSFET gate referenced to SW node; supports bootstrap operation. |
| SW (Pin 13) | Switch node connection | Connects to inductor and MOSFET source/drain junction; carries high di/dt switching waveform; requires low-inductance layout. |
| BOOST (Pin 14) | Bootstrap supply for top gate driver | Charged via external Schottky diode from INTVCC; swings from INTVCC to (VIN + INTVCC); enables high-side N-MOSFET drive. |
| BG (Pin 15) | Bottom-gate driver output | Ground-referenced driver with 2.4Ω pull-up/1.1Ω pull-down; directly drives synchronous rectifier N-MOSFET. |
| INTVCC (Pin 16) | Internal LDO output (5.1V) | Powers gate drivers and control logic; requires ≥2.2µF ceramic decoupling to PGND; bypassed by EXTVCC when >4.7V. |
| EXTVCC (Pin 17) | External LDO input | Enables higher-efficiency power sourcing from regulated output rail; switchover hysteresis = 250mV; must not exceed 14V. |
| PGND (Pin 18) | Power ground return | Low-impedance return path for bottom MOSFET source and input capacitor negative terminal; separate from SGND. |
| VIN (Pin 19) | Main input supply | Accepts 4V–38V; requires local ceramic bypass to SGND; absolute max = 40V. |
| ILIM (Pin 20) | Current limit threshold select | SGND = 22mV; FLOAT = 43mV; INTVCC = 64mV (typ) - sets peak inductor current trip point without external components. |
Key Features
| Feature | Design Value |
|---|---|
| OPTI-LOOP® Compensation | Allows stable loop response across wide output capacitance (22µF–1000µF) and ESR ranges without redesigning compensation network. |
| Programmable Light-Load Mode | Selectable Burst Mode (50μA IQ), pulse-skipping, or forced continuous conduction - optimizes efficiency vs. noise trade-off per application need. |
| 99% Maximum Duty Cycle | Enables ultra-low dropout operation (e.g., 12V→11.5V at high load), critical for automotive cold-crank and brownout resilience. |
| Output Overvoltage Protection | Hardware-based OVP triggers shutdown if VFB exceeds setpoint by >13%; protects downstream loads without software intervention. |
| Dropout Detector & CB Recharge Logic | Automatically inserts periodic off-time during 100% duty-cycle operation to recharge bootstrap capacitor - prevents gate drive failure in deep dropout. |
Applications
| Automotive Infotainment Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering 3.3V/5V rails for MCU, display, and audio codecs in head-unit systems requiring always-on capability and cold-crank support. IC Role / Device Role / Timing Role: Primary synchronous buck controller regulating intermediate bus (12V/24V) to low-voltage logic rails with soft-start sequencing and PGOOD monitoring. Use Value: 50μA quiescent current extends battery life during vehicle sleep; –55°C to 150°C rating ensures reliability under hood; TRACK/SS enables safe multi-rail power-up coordination. | Use Scenario: Generating isolated 12V/15V auxiliary supplies for analog sensor front-ends and digital isolators in factory automation controllers. IC Role / Device Role / Timing Role: High-efficiency, wide-input DC/DC controller delivering stable output despite fluctuating 24V industrial bus voltage and load transients. Use Value: 4V–38V input range accommodates brownouts and surges; programmable frequency avoids EMI-sensitive bands; current foldback protects MOSFETs during field-wiring faults. |
| Telecom Remote Radio Unit (RRU) | Medical Portable Diagnostic Device |
Use Scenario: Converting 48V backplane supply to 12V/5V for FPGA, RF transceivers, and memory in outdoor base station equipment. IC Role / Device Role / Timing Role: Phase-lockable controller synchronized to system clock to minimize jitter coupling into sensitive RF signal paths. Use Value: 75kHz–750kHz PLL range enables precise clock alignment; low-noise Burst Mode reduces conducted emissions during idle periods. | Use Scenario: Battery-powered ultrasound or patient monitor with strict standby current budget and multi-stage power sequencing. IC Role / Device Role / Timing Role: Main system regulator managing Li-ion battery discharge (3.0V–4.2V) to 3.3V/1.8V rails with precise soft-start and power-good signaling. Use Value: 14μA shutdown current meets Class II medical leakage limits; adjustable soft-start prevents inrush into capacitive loads; PGOOD enables safe processor wake-up. |
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 |
|---|---|---|---|
| LTC3891MPFE#TRPBF | Integrated 5V/100mA bias supply; higher 60V max input; dual-output capable; same pinout but larger footprint. | Eliminates need for external INTVCC LDO; supports higher input voltages in industrial motor drives. | Choose when bias supply integration and >38V input are required; verify PCB layout compatibility due to different thermal pad size. |
| LM5116MHX/NOPB | Higher 100V max input; no integrated LDO; requires external VDD bias; lower 35μA IQ in Eco-mode. | Better suited for 48V telecom or PoE-powered equipment; lacks TRACK/SS and PGOOD pins. | Prefer for cost-sensitive, high-input-voltage designs where soft-start tracking and power-good reporting are handled externally. |
Compared with LTC3807MPFE#TRPBF, LTC3891MPFE#TRPBF adds integrated bias generation and wider input range but increases board area, while LM5116MHX/NOPB offers higher voltage tolerance and lower IQ but removes key system-level features like tracking and PGOOD - making LTC3807MPFE#TRPBF optimal for compact, feature-rich automotive and portable designs.
Availability
LTC3807MPFE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, telecom remote radio units, and portable medical devices requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LTC3807MPFE#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 acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for the LTC portfolio, delivering high-reliability analog and power management ICs for demanding applications.
The LTC3807MPFE#TRPBF belongs to the LTC® high-performance DC/DC controller family, designed specifically for automotive, industrial, and telecom systems requiring ultra-low quiescent current, extended temperature operation, and robust light-load efficiency without sacrificing transient response.
FAQ
What is the maximum input voltage rating for the LTC3807MPFE#TRPBF?
The LTC3807MPFE#TRPBF has an absolute maximum input voltage rating of 40V on the VIN pin. Its operational input range is specified from 4V to 38V, making it suitable for 24V automotive and industrial bus applications with margin for transients. Exceeding 40V risks permanent damage per Absolute Maximum Ratings.
How does the ILIM pin affect current limiting on the LTC3807MPFE#TRPBF?
The ILIM pin on the LTC3807MPFE#TRPBF selects one of three fixed current-sense thresholds: 22mV (ILIM = GND), 43mV (ILIM = FLOAT), or 64mV (ILIM = INTVCC). This directly sets the peak inductor current trip point without external resistors, simplifying design and improving consistency across production units.
Can the LTC3807MPFE#TRPBF operate in Burst Mode with the TRACK/SS pin active?
Yes, the LTC3807MPFE#TRPBF supports simultaneous Burst Mode operation and TRACK/SS functionality. During soft-start, the controller regulates VFB to the rising TRACK/SS voltage regardless of light-load mode; once VOUT reaches regulation, Burst Mode engages automatically if PLLIN/MODE is grounded.
What is the purpose of the exposed pad (Pin 21) on the LTC3807MPFE#TRPBF TSSOP package?
The exposed pad (Pin 21) on the LTC3807MPFE#TRPBF TSSOP package is electrically connected to SGND and must be soldered to a PCB thermal pad tied to system ground. It provides critical thermal conduction (θJA = 38°C/W) and improves EMI performance by lowering high-frequency impedance to ground.
Does the LTC3807MPFE#TRPBF require external components for basic operation?
Yes, the LTC3807MPFE#TRPBF requires external components for core functionality: two N-channel MOSFETs, power inductor, input/output capacitors, feedback resistors, bootstrap diode/capacitor, and optional soft-start capacitor on TRACK/SS. No external current-sense resistor is needed if using DCR sensing, but RSENSE is required for precision current limiting.
LTC3807MPFE#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
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LTC3807MPFE#TRPBF FAQ
1.How can I place an order for LTC3807MPFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3807MPFE#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 LTC3807MPFE#TRPBF reliable?
The price and inventory of LTC3807MPFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3807MPFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3807MPFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3807MPFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3807MPFE#TRPBF?
LTC3807MPFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3807MPFE#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 LTC3807MPFE#TRPBF?
For technical support, including LTC3807MPFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3807MPFE#TRPBF requirements.
6.How does Aetrix verify that LTC3807MPFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3807MPFE#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 LTC3807MPFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3807MPFE#TRPBF?
All LTC3807MPFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3807MPFE#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 LTC3807MPFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3807MPFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3807MPFE#TRPBF 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…
