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Analog Devices Inc. LT3724MPFE#TRPBF
- Part No.:
- LT3724MPFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT3724MPFE#TRPBF.pdf
- Description:
- IC REG CTRLR MULT TOP 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,437
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Product details
Overview
LT3724MPFE#TRPBF from Analog Devices (formerly Linear Technology) is a high-voltage, current-mode DC/DC controller IC for medium-power step-down, step-up, inverting, and SEPIC converters. It operates from 4V–60V input, delivers up to 36V output in buck topology, features 200kHz fixed-frequency operation, ±1.3% reference accuracy, and drives external N-channel MOSFETs. It is used in industrial power distribution and 12V/42V automotive systems requiring robust, low-quiescent-current regulation.
For engineers reviewing the LT3724MPFE#TRPBF datasheet, LT3724MPFE#TRPBF pinout, LT3724MPFE#TRPBF application, or LT3724MPFE#TRPBF equivalent, key selection criteria include its –55°C to 125°C extended temperature grade, 150mV current sense threshold, Burst Mode® operation (<100µA quiescent), programmable soft-start, and integrated high-voltage bias regulator for gate drive.
Technical Context
The LT3724MPFE#TRPBF implements fixed-frequency current-mode control with slope/antislope compensation-ensuring stable operation across wide duty cycles without current limit degradation. Its error amplifier features 340µmhos transconductance and 62dB DC gain, enabling precise loop compensation via external RC networks on the VC pin.
It integrates a bootstrapped high-side gate driver (TG pin) capable of 9.8V ON voltage and 60ns rise/fall times, supporting large N-MOSFETs. The internal VCC regulator enables startup from VIN ≥7.5V and supports back-driving from VOUT for improved efficiency, while dedicated UVLO thresholds (VIN, VCC, BOOST) with hysteresis ensure reliable fault recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports wide-range industrial and automotive inputs including 12V, 24V, and 42V battery systems. |
| Operating Frequency | 200kHz (typical) - fixed frequency enables predictable EMI filtering and simplifies magnetics design. |
| Reference Accuracy | ±1.3% - ensures tight output voltage regulation over temperature and line/load variations. |
| Current Sense Threshold | 150mV - sets peak inductor current limit independent of duty cycle due to antislope compensation. |
| Burst Mode Quiescent Current | <100µA - maintains high light-load efficiency in always-on systems like telematics or sensor nodes. |
| Shutdown Current | 10µA - enables ultra-low-power system-level sleep modes without external disconnect circuitry. |
| Junction Temp Range | –55°C to 125°C - qualified for extended-temperature industrial, avionics, and heavy equipment applications. |
| Package | 16-pin thermally enhanced TSSOP with exposed SGND pad - provides low θJC (10°C/W) for high-power density layouts. |
Pinout & Package
LT3724MPFE#TRPBF is housed in a 16-lead plastic TSSOP package (FE) with an exposed thermal pad internally connected to SGND (Pin 17). The package requires soldering the exposed pad to PCB ground for optimal thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Main supply input | Accepts 4V–60V; powers internal circuits and VCC regulator; must be decoupled locally to SGND. |
| NC (2) | No connection | Unbonded; leave floating or tie to SGND per layout best practice. |
| SHDN (3) | Enable/UVLO control | 1.35V rising threshold with 120mV hysteresis; pulls below 0.7V for full shutdown (<10µA IQ). |
| CSS (4) | Soft-start timing | Sinks 2µA to control output voltage slew rate; shorting to SGND disables soft-start. |
| BURST_EN (5) | Burst Mode enable | Ground to enable Burst Mode; connect to VCC to disable for continuous switching. |
| VFB (6) | Feedback input | Compares output voltage (via resistor divider) to 1.231V internal reference; regulates output. |
| VC (7) | Error amplifier output | Controls peak switch current; connects to integrator network for loop compensation. |
| SGND (8,17) | Signal ground | Low-noise analog reference; connects to –VOUT side of output caps; exposed pad must be soldered. |
| SENSE– (9) | Current sense negative | Connects to VOUT side of RSENSE; forms 150mV differential threshold with SENSE+. |
| SENSE+ (10) | Current sense positive | Connects to inductor side of RSENSE; senses inductor current for cycle-by-cycle limiting. |
| PGND (11) | Power ground | High-current return for VCC regulator and internal SW pull-down; ties to VCC capacitor negative. |
| VCC (12) | Bias supply node | Internally regulated from VIN; can be back-driven from VOUT to reduce dissipation and improve efficiency. |
| NC (13) | No connection | Unbonded; leave floating or tie to SGND. |
| SW (14) | Switch node | Connects to MOSFET source, Schottky cathode, and inductor; swings from VIN to ~–0.3V during off-time. |
| TG (15) | Bootstrapped gate driver | Drives N-MOSFET gate with fast edges; requires short/wide trace to minimize inductance and ringing. |
| BOOST (16) | Bootstrap supply | Charged via external diode from VCC; referenced to SW; supplies TG driver; max voltage = VIN + VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Antislope compensation | Maintains full current limit capability across all duty cycles by offsetting slope compensation ramp on threshold. |
| Programmable soft-start | Directly controls output voltage slew rate via CSS capacitor to limit inrush, suppress overshoot, and support sequencing. |
| Internal high-voltage VCC regulator | Enables startup from VIN ≥7.5V and supports back-driving from VOUT for >90% efficiency at full load. |
| Thermal shutdown protection | Activates at TJ = 125°C (TJMAX); protects device during overload or poor heatsinking without latch-off. |
| Fixed-frequency current-mode control | Delivers fast line/load transient response and inherent cycle-by-cycle current limiting for reliability. |
| 16-pin TSSOP with exposed pad | Provides low thermal resistance (θJC = 10°C/W) and compact footprint for space-constrained industrial modules. |
Applications
| Industrial Power Distribution | 12V/42V Automotive Systems |
|---|---|
|
Use Scenario: Centralized 24V/48V bus powering distributed I/O modules, PLCs, and motor drivers in factory automation. IC Role / Device Role / Timing Role: High-voltage step-down controller regulating local 5V/3.3V rails from noisy, wide-range DC bus. Use Value: Wide 4V–60V input range accommodates brownouts and load-dump transients; Burst Mode extends standby runtime. |
Use Scenario: Power conversion in engine control units (ECUs), ADAS sensors, and infotainment head units. IC Role / Device Role / Timing Role: Primary buck controller generating stable 5V/3.3V supplies from 12V/42V vehicle batteries. Use Value: –55°C to 125°C MP grade ensures operation under hood extremes; 150mV current sense enables accurate overload detection. |
| Avionics Power Supplies | Telecom Distributed Power |
|
Use Scenario: DC-DC conversion in flight-critical subsystems requiring high reliability and extended temperature operation. IC Role / Device Role / Timing Role: Regulating auxiliary 28V-to-5V/12V supplies in airborne communication and navigation units. Use Value: 100% tested MP grade and thermal shutdown meet DO-160 environmental compliance; low shutdown current aids battery backup. |
Use Scenario: Intermediate bus converters in 48V telecom rectifiers feeding point-of-load regulators. IC Role / Device Role / Timing Role: High-efficiency 48V-to-12V step-down controller for base station power shelves. Use Value: Fixed 200kHz frequency simplifies EMI filter design; programmable UVLO prevents operation during brownout events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage current-mode controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3724MPFE#TRPBF | Same die, rebranded post-Analog Devices acquisition; identical electrical specs, pinout, and MP-grade qualification. | No functional difference; direct second-source part with same lifecycle and documentation. | Select when sourcing from Analog Devices' official channel or requiring unified procurement with other LTC-branded controllers. |
| LT3757MPFE#TRPBF | Wider 2.8V–100V input, higher 1MHz max frequency, but no Burst Mode; 100mV current sense threshold. | Better suited for ultra-wide-input or high-frequency designs; lacks light-load efficiency optimization. | Choose for >60V input requirements or where Burst Mode is unnecessary; verify loop stability with higher fSW. |
Compared with LT3724MPFE#TRPBF, LTC3724MPFE#TRPBF offers identical performance and qualification, while LT3757MPFE#TRPBF trades Burst Mode efficiency for broader input range and higher switching frequency-making it suitable only where those specific trade-offs align with system priorities.
Availability
LT3724MPFE#TRPBF is available at Aetrix Electronics and suitable for industrial power distribution, 12V/42V automotive systems, and avionics applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT3724MPFE#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT3724MPFE#TRPBF belongs to ADI's legacy Linear Technology high-voltage DC/DC controller product line, designed specifically for rugged, medium-power industrial and transportation power conversion where extended temperature operation and low-light-load quiescent current are critical.
FAQ
What is the operating temperature range of the LT3724MPFE#TRPBF?
The LT3724MPFE#TRPBF is fully specified and 100% tested over a junction temperature range of –55°C to 125°C. This extended temperature grade makes it suitable for under-hood automotive, avionics, and industrial environments where ambient temperatures exceed standard commercial or industrial limits. The MP grade also includes enhanced screening and reliability testing beyond the E and I grades.
Does the LT3724MPFE#TRPBF support synchronous rectification?
No, the LT3724MPFE#TRPBF is designed for nonsynchronous operation and requires an external Schottky diode for freewheeling. It does not integrate a bottom-side MOSFET driver or support synchronous rectification. For synchronous buck applications, consider the LT3800 or LTC3775 families, which provide complementary high- and low-side gate drive outputs.
How is Burst Mode operation enabled or disabled on the LT3724MPFE#TRPBF?
Burst Mode operation on the LT3724MPFE#TRPBF is controlled by the BURST_EN pin (Pin 5): connect it to SGND to enable Burst Mode (reducing quiescent current to <100µA at light loads), or connect it to VCC to disable Burst Mode and enforce continuous switching. The mode is not software-configurable and requires only this simple hardware connection.
What is the purpose of the antislope compensation in the LT3724MPFE#TRPBF?
The antislope compensation in the LT3724MPFE#TRPBF cancels the duty-cycle-dependent reduction in current limit caused by standard slope compensation. By adding a matching ramp to the current sense threshold, it preserves the full 150mV current limit across all duty cycles-enabling consistent overload protection and maximum power delivery regardless of input-output voltage ratio.
Can the LT3724MPFE#TRPBF be used in SEPIC or inverting topologies?
Yes, the LT3724MPFE#TRPBF supports SEPIC, inverting, step-up, and step-down topologies due to its current-mode architecture and flexible gate drive configuration. Its datasheet includes verified reference designs for all four configurations. Component selection-including transformer or coupled inductor, MOSFET voltage rating, and diode reverse voltage-must be validated per topology-specific stress analysis.
LT3724MPFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost, SEPIC
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4V ~ 60V
- Frequency - Switching:
- 200kHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- No
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Soft Start
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
LT3724MPFE#TRPBF FAQ
1.How can I place an order for LT3724MPFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3724MPFE#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 LT3724MPFE#TRPBF reliable?
The price and inventory of LT3724MPFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3724MPFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3724MPFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3724MPFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3724MPFE#TRPBF?
LT3724MPFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3724MPFE#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 LT3724MPFE#TRPBF?
For technical support, including LT3724MPFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3724MPFE#TRPBF requirements.
6.How does Aetrix verify that LT3724MPFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3724MPFE#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 LT3724MPFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3724MPFE#TRPBF?
All LT3724MPFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3724MPFE#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 LT3724MPFE#TRPBF part is unused and in its original packaging.
Return procedure for LT3724MPFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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