My Inquiry
My Account
Analog Devices Inc. LTC3716EG#TRPBF
- Part No.:
- LTC3716EG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 36-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC3716EG#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 36SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,620
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3716EG#TRPBF from Analog Devices (formerly Linear Technology) is a 2-phase, 5-bit VID-programmable, current-mode synchronous step-down switching regulator controller driving two external N-channel MOSFETs. It operates at fixed frequencies from 150kHz to 300kHz with 180° phase shift between channels, delivers ±1% output voltage accuracy over 0.6V–1.75V range, and supports true remote differential sensing for high-current CPU core supplies.
For engineers reviewing the LTC3716EG#TRPBF datasheet, LTC3716EG#TRPBF pinout, LTC3716EG#TRPBF application, or LTC3716EG#TRPBF equivalent, key selection considerations include dual-phase current sharing, OPTI-LOOP™ compensation for wide ESR capacitor compatibility, Burst Mode™ operation for light-load efficiency, programmable soft-start via RUN/SS, and integrated overvoltage/short-circuit protection.
Technical Context
The LTC3716EG#TRPBF implements a constant-frequency, current-mode control architecture with two independent 180° out-of-phase PWM channels. Each channel uses peak-current sensing referenced to an ITH-controlled threshold (62–88mV), with internal differential amplifier (gain = 1.0 V/V, CMRR ≥ 70dB) enabling true remote sensing across load terminals.
It integrates three selectable operating modes-PWM, Burst Mode™, and Cycle Skip-controlled by the FCB pin, and features PLL synchronization capability via PLLIN/PLLFLTR pins for frequency alignment with external clocks or noise-sensitive systems. The controller supports dual-input supply capability and active voltage positioning for mobile CPU applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | 2-phase synchronous buck controller with antiphase operation reducing input/output RMS ripple current by √2 |
| Output Voltage Range | 0.6V to 1.75V via 5-bit VID code (±1% accuracy at 25°C) |
| Switching Frequency | Programmable 150kHz–300kHz; synchronized via PLLIN pin or set by PLLFLTR DC voltage |
| Current Sensing | Differential SENSE+/SENSE− inputs with 62–88mV max threshold; supports true remote sensing for >40A loads |
| Control Loop | Current-mode with OPTI-LOOP™ compensation; ITH pin (0–2.4V) sets per-phase peak current limit |
| Protection Features | Overvoltage soft latch (±10% trip), undervoltage lockout (3.33V), short-circuit shutdown via RUN/SS timeout, current foldback |
| Package | 36-lead narrow SSOP (G package), thermal resistance θJA = 85°C/W |
Pinout & Package
The LTC3716EG#TRPBF is housed in a 36-lead narrow plastic SSOP (G package) with exposed pad for thermal enhancement. Pin spacing is 0.025", body width 0.209", and maximum height 1.75mm. Recommended PCB layout includes dedicated SGND and PGND planes with star grounding at PGND pin 28.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN/SS (1) | Soft-start timer & shutdown control | Capacitor-connected pin sets ramp time; <0.8V forces shutdown; discharge current triggers short-circuit latchoff |
| SENSE1+/SENSE2+ (2,14) | Positive current sense inputs | Differential inputs to per-channel current comparators; referenced to SENSE1−/SENSE2− for accurate RSENSE-based current limiting |
| EAIN (4) | Error amplifier inverting input | Receives feedback from VDIFFOUT divider; compared to 0.6V reference to regulate output voltage |
| FCB (7) | Forced continuous/burst mode select | Voltage below 0.6V forces PWM; 0.6–2.8V enables Burst Mode™; >2.8V disables burst for constant-frequency operation |
| ITH (8) | Error amplifier output & current limit control | 0–2.4V analog signal setting per-phase peak current threshold; directly scales current sense comparator trip point |
| VDIFFOUT (10) | Differential amplifier output | True remote-sense output driving external resistor divider to set regulated output voltage; supports active voltage positioning |
| TG1/TG2 (24,35) | Top gate drivers | Floating high-side N-MOSFET drivers with BOOST1/BOOST2 bootstrap supplies; 30–90ns transition times |
| BG1/BG2 (27,31) | Bottom gate drivers | Low-side N-MOSFET drivers referenced to PGND; 20–90ns fall time ensures fast turn-off |
| PGND (28) | Power ground return | Common return for bottom MOSFET sources and input capacitor negative terminal; must be low-inductance path |
| INTVCC (29) | Internal 5V LDO output | Powers gate drivers and control circuitry; switchover to EXTVCC occurs at 4.7V; 50mA RMS capability |
| VID0–VID4 (17–21) | 5-bit VID programming inputs | Logic-level inputs (0.4V/1.6V thresholds) selecting 32 output voltages between 0.6V and 1.75V |
| PGOOD (36) | Open-drain power-good indicator | Asserts low when EAIN deviates >±10% from 0.6V reference; 10µs response time after regulation achieved |
Key Features
| Feature | Design Value |
|---|---|
| 2-phase antiphase operation | Reduces input/output capacitor RMS current by √2, enabling smaller CIN/COUT and lower ESR requirements for 40A+ CPU rails |
| OPTI-LOOP™ compensation | Allows stable loop response across wide range of output capacitor types and ESR values without external compensation redesign |
| True remote differential sensing | Integrated differential amplifier (ADA = 1.0 V/V, CMRR ≥ 70dB) eliminates IR drop errors in high-current PCB traces or connectors |
| Three selectable operating modes | PWM (forced continuous), Burst Mode™ (high efficiency at light load), and Cycle Skip (low-noise constant frequency down to ~1% load) |
| Integrated overvoltage protection | Soft-latch OV comparator trips at ±10% deviation from setpoint, preventing nuisance shutdowns during transients |
| Programmable soft-start & short-circuit detection | RUN/SS pin provides adjustable current ramp and timed latchoff - discharges on sustained <70% VOUT condition |
Applications
| Mobile CPU Core Supply | High-Current FPGA/ASIC Rail |
|---|---|
|
Use Scenario: Powering Intel/AMD mobile processor cores requiring dynamic voltage scaling and tight transient response under 0–40A load steps. IC Role / Device Role / Timing Role: Dual-phase synchronous buck controller implementing VID-based voltage programming, antiphase current sharing, and active voltage positioning. Use Value: Delivers ±1% output accuracy and sub-200ns minimum on-time for fast load-step response while reducing input ripple current by 75% versus single-phase designs. |
Use Scenario: Generating stable 1.2V/1.8V/2.5V rails for high-performance FPGAs with >30A steady-state current and 10A/µs slew rate demands. IC Role / Device Role / Timing Role: Current-mode 2-phase controller with true remote sensing and OPTI-LOOP™ compensation ensuring stability across wide capacitor ESR ranges. Use Value: Enables use of cost-effective polymer or MLCC output capacitors without loop compensation changes; differential sensing maintains regulation despite PCB trace losses. |
| Server VRM Auxiliary Rail | Industrial High-Efficiency DC-DC Module |
|
Use Scenario: Secondary rail generation in server voltage regulator modules where secondary winding regulation and multi-rail coordination are required. IC Role / Device Role / Timing Role: Controller using FCB pin to force continuous conduction on both phases for auxiliary winding regulation and precise cross-regulation. Use Value: Eliminates need for separate auxiliary controller; FCB-driven forced-PWM mode ensures consistent timing and current sharing across primary/auxiliary outputs. |
Use Scenario: Compact, high-efficiency 24V-to-1.5V conversion in industrial embedded systems requiring long-term reliability and thermal management. IC Role / Device Role / Timing Role: Fixed-frequency synchronous buck controller with EXTVCC support for self-biasing and thermal-aware gate drive optimization. Use Value: Internal 5V LDO switchover to EXTVCC (≥4.7V) reduces power loss and die temperature; SSOP package supports conformal coating for harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-phase synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95836IRZ-T | 6-bit VID (0.3–1.5V), integrated MOSFET drivers only (no external FET support), no PLL sync, 300kHz max freq | Targeted for notebook CPU VRMs with integrated power stages; lacks remote sensing and EXTVCC flexibility | Select if board space is constrained and discrete MOSFETs are not required; verify VID range matches system requirements |
| MP2940AGQSE-Z | 4-phase capable, 3–24V VIN, 0.5–3.63V VOUT, no VID interface, uses PMBus for programming | Designed for datacenter VRMs with digital telemetry; requires MCU/PMBus host, no analog VID compatibility | Choose for systems needing real-time telemetry, phase shedding, or firmware-upgradable parameters; not drop-in for VID-based platforms |
Compared with ISL95836IRZ-T and MP2940AGQSE-Z, the LTC3716EG#TRPBF uniquely combines analog VID programmability, true remote differential sensing, EXTVCC self-biasing, and PLL synchronization in a discrete-FET controller - making it optimal for high-reliability, thermally sensitive, or noise-critical mobile/embedded buck designs where flexibility and analog control are prioritized.
Availability
LTC3716EG#TRPBF is available at Aetrix Electronics and suitable for mobile computing CPU supplies, high-current FPGA/ASIC rails, server VRM auxiliary outputs, and industrial DC-DC modules requiring stable component supply with full production lifecycle support.
Supply support for LTC3716EG#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. (including legacy Linear Technology products) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and power management ICs for precision, power, and RF applications.
The LTC3716EG#TRPBF belongs to Linear's high-efficiency synchronous buck controller product line, designed specifically for demanding mobile and embedded computing power delivery where thermal performance, transient response, and VID compatibility are critical.
FAQ
What is the recommended input voltage range for the LTC3716EG#TRPBF?
The LTC3716EG#TRPBF supports a wide input voltage range of 4V to 36V, with absolute maximum ratings up to 36V on VIN and –0.3V minimum. Operation below 4V may trigger undervoltage lockout (UVLO threshold is 3.33V), while exceeding 36V risks permanent damage. For reliable 24V industrial applications, ensure transient suppression on VIN to stay within this window.
How does the LTC3716EG#TRPBF achieve current sharing between its two phases?
The LTC3716EG#TRPBF achieves inherent current sharing through current-mode control architecture: each phase independently regulates peak inductor current using identical ITH-controlled thresholds and matched internal current comparators. With matched external components (inductors, MOSFETs, sense resistors), the controller maintains ≤5% current imbalance across load conditions without external current-balancing circuitry.
Can the LTC3716EG#TRPBF operate without a VID interface?
Yes, the LTC3716EG#TRPBF can operate without VID signals: tie all VID0–VID4 pins to VBIAS (2.7–5.5V) to set maximum output voltage (1.75V), or ground them for minimum (0.6V). Alternatively, use external resistive feedback to EAIN for fixed-voltage operation - though VID functionality (dynamic voltage scaling, AVP) will be disabled in that configuration.
What is the purpose of the AMPMD pin on the LTC3716EG#TRPBF?
The AMPMD pin on the LTC3716EG#TRPBF selects the operational mode of the internal differential amplifier: grounding AMPMD connects precision internal resistors for unity-gain differencing (ideal for remote sensing); tying AMPMD to INTVCC bypasses those resistors, exposing raw VOS+ and VOS− inputs for custom gain configurations or non-differential applications.
Does the LTC3716EG#TRPBF support external clock synchronization?
Yes, the LTC3716EG#TRPBF supports external clock synchronization via the PLLIN pin, which accepts TTL/CMOS-compatible signals up to 300kHz. When enabled, the internal phase-locked loop aligns the rising edge of TG1 with the rising edge of the external clock, enabling noise-sensitive system-level timing coordination and EMI reduction through frequency dithering or fixed-frequency alignment.
LTC3716EG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 4V ~ 36V
- Frequency - Switching:
- 140kHz ~ 310kHz
- Duty Cycle (Max):
- 99.5%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-SSOP
LTC3716EG#TRPBF FAQ
1.How can I place an order for LTC3716EG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3716EG#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 LTC3716EG#TRPBF reliable?
The price and inventory of LTC3716EG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3716EG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3716EG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3716EG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3716EG#TRPBF?
LTC3716EG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3716EG#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 LTC3716EG#TRPBF?
For technical support, including LTC3716EG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3716EG#TRPBF requirements.
6.How does Aetrix verify that LTC3716EG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3716EG#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 LTC3716EG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3716EG#TRPBF?
All LTC3716EG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3716EG#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 LTC3716EG#TRPBF part is unused and in its original packaging.
Return procedure for LTC3716EG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3716EG#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…
