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Analog Devices Inc. LTC3824EMSE#TRPBF
- Part No.:
- LTC3824EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3824EMSE#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,411
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Product details
Overview
LTC3824EMSE#TRPBF from Analog Devices (formerly Linear Technology) is a high-voltage step-down DC/DC controller designed to drive external P-channel MOSFETs in industrial and automotive power supplies. It operates from 4V to 60V input, delivers constant-frequency current-mode control up to 600kHz, and achieves 40µA quiescent current in Burst Mode - enabling extended battery runtime in 5V/2A buck converter applications.
For engineers reviewing the LTC3824EMSE#TRPBF datasheet, LTC3824EMSE#TRPBF pinout, LTC3824EMSE#TRPBF application, or LTC3824EMSE#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed thermal package mapping, real-world efficiency trade-offs between Burst Mode and forced CCM, and two rigorously cross-checked alternative controllers for high-input-voltage buck designs.
Technical Context
The LTC3824EMSE#TRPBF implements a transconductance error amplifier (gm = 220–370 µmho) that regulates output voltage via a 0.788–0.816V reference and controls a current-mode PWM loop using VC as the control node. Its gate driver delivers 2.5A peak source/sink into 10nF load with 8V clamping (VCC > 9V), supporting industrial P-channel MOSFETs requiring ≥10V VGS rating.
Burst Mode operation is enabled by leaving SYNC/MODE open or pulling it >2V, triggering sleep cycles when VC drops below ~0.9V at light load; shutdown occurs when VC falls ≤25mV, reducing supply current to 5–15µA. Frequency foldback to 50kHz activates when VFB < 0.5V (e.g., short-circuit), and soft-start is controlled by an internal 5µA current charging an external capacitor on SS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports automotive load-dump transients and industrial 48V rail operation without external pre-regulation. |
| Quiescent Current (Burst Mode) | 40µA typical - enables >1000-hour battery runtime in always-on 12V-to-5V systems drawing <1mA load. |
| Switching Frequency Range | 200kHz to 600kHz - programmable via RSET resistor; higher frequencies allow smaller magnetics but increase switching losses. |
| Gate Drive Capability | 8V clamp (VCC > 9V), 2.5A peak source/sink - sufficient to fully enhance high-voltage P-MOSFETs like Si7465DP within 50ns rise/fall times. |
| Current Sense Threshold | 75–120mV (VCC–VSENSE) - sets overcurrent limit with ±25% tolerance; requires Kelvin-connected sense resistor for accuracy. |
| Reference Voltage Accuracy | ±1.5% over –40°C to 125°C - ensures stable 5V or 12V output regulation across automotive temperature range. |
| Minimum On-Time | 350ns - limits maximum duty cycle and constrains minimum achievable output voltage at high input voltages. |
Pinout & Package
The LTC3824EMSE#TRPBF is housed in a thermally enhanced 10-lead MSOP (MSE) package with exposed pad (Pin 11) soldered to PCB ground for θJC = 3°C/W thermal performance. The package measures 3.0mm × 3.0mm × 1.1mm and is rated for –40°C to 125°C junction operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 11) | Power and signal ground reference | Exposed pad (Pin 11) must be soldered to large copper pour for thermal dissipation and noise immunity. |
| SYNC/MODE (Pin 2) | Burst Mode enable/disable & sync input | Open or >2V enables Burst Mode; grounded or >20kHz sync pulse disables Burst Mode and forces pulse-skipping. |
| RSET (Pin 3) | Frequency programming node | Resistor to GND sets switching frequency (e.g., 392kΩ → 200kHz); VRSET = 1.2V internally regulated. |
| VC (Pin 4) | Error amplifier output & PWM control | 0.7V threshold starts switching; <25mV triggers micropower shutdown; 0.84V threshold enters Burst Mode. |
| VFB (Pin 5) | Inverting input of voltage error amplifier | Regulates output via resistor divider; <0.5V triggers 50kHz foldback for short-circuit protection. |
| SS (Pin 6) | Soft-start timing control | Internal 5µA current charges external capacitor; ramp time = (CSS × 0.8V)/5µA. |
| SENSE (Pin 7) | High-side current sense input | Measures (VCC–VSENSE) drop across external sense resistor; 100mV threshold sets current limit. |
| VCC (Pin 8) | Controller supply input | Accepts 4–60V; requires local ceramic bypass; powers internal regulator for CAP/GATE circuitry. |
| GATE (Pin 9) | P-channel MOSFET gate driver output | Drives external P-MOSFET gate; clamped to 8V below VCC when VCC > 9V; 2.5A peak capability. |
| CAP (Pin 10) | Gate driver bias capacitor terminal | Requires ≥0.1µF low-ESR capacitor to VCC to stabilize internal 8V regulator for clean gate drive. |
Key Features
| Feature | Design Value |
|---|---|
| 40µA Burst Mode quiescent current | Extends battery life in always-on automotive modules (e.g., telematics, CAN gateway) without compromising startup time. |
| 100% duty cycle capability | Enables ultra-low dropout operation down to VOUT ≈ VIN – 0.5V, critical for cold-crank 6V-to-5V conversion. |
| Programmable current limit (75–120mV) | Allows precise overcurrent protection tuning independent of output voltage, improving system reliability under fault conditions. |
| 8V gate drive clamp with 2.5A drive strength | Ensures robust turn-on of high-threshold P-MOSFETs (e.g., Si7465DP) while limiting gate oxide stress at high VCC. |
| Synchronization input with 1.3V rising-edge threshold | Permits multi-phase interleaving or EMI reduction by locking switching frequency to external clock (230–600kHz range). |
Applications
| Automotive Infotainment Power Supply | Industrial 48V-to-12V Intermediate Bus |
|---|---|
Use Scenario: Powering DSP, display, and audio subsystems from vehicle battery (6–16V nominal, up to 60V during load dump). IC Role / Device Role / Timing Role: High-voltage step-down controller regulating 5V/2A output with Burst Mode for standby efficiency. Use Value: 40µA quiescent current prevents parasitic battery drain during ignition-off; 60V absolute max rating withstands load-dump transients without protection circuitry. |
Use Scenario: Converting 48V telecom or factory automation bus to 12V for motor drivers and I/O modules. IC Role / Device Role / Timing Role: Constant-frequency current-mode controller driving P-MOSFET with programmable 400kHz switching for compact magnetics. Use Value: 60V input rating eliminates need for pre-regulator; 8V gate drive ensures full enhancement of 100V-rated P-MOSFETs at high ambient temperatures. |
| Telecom Remote Radio Unit (RRU) | Distributed Power Architecture (DPA) |
Use Scenario: Generating 3.3V/3A bias rail inside outdoor base station equipment operating from –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Temperature-stable buck controller with ±1.5% VREF accuracy and 125°C-rated MSE package. Use Value: Guaranteed –40°C to 125°C operation avoids derating; low 350ns minimum on-time supports 3.3V output from 48V input at 400kHz. |
Use Scenario: Local point-of-load conversion in server backplanes where 12V intermediate bus feeds multiple 5V/3A rails. IC Role / Device Role / Timing Role: Synchronizable controller enabling phase-shifted operation across multiple LTC3824EMSE#TRPBF units to reduce input ripple. Use Value: SYNC/MODE pin allows deterministic frequency alignment across boards; 2.5A gate drive sustains high-efficiency operation at 200kHz–600kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-input-voltage buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3892EMSE#TRPBF | Dual-output, 60V input, 2-phase interleaved, 3.5mA IQ (no Burst Mode) | Supports dual-rail outputs (e.g., 5V + 3.3V) and lower output ripple via interleaving; higher IQ increases light-load loss. | Select when needing dual outputs or reduced EMI; avoid if 40µA Burst Mode is mandatory for battery-powered use. |
| MP2482DS-LF-Z | Single-channel, 60V input, integrated 1.2A MOSFET, 100µA IQ, fixed 250kHz | Lower cost, smaller footprint, but limited to ≤1.2A output and no frequency programming or synchronization. | Select for space-constrained, cost-sensitive 1A applications where programmability and ultra-low IQ are not required. |
Compared with LTC3824EMSE#TRPBF, LTC3892EMSE#TRPBF adds channel count and interleaving at the expense of quiescent current and complexity, while MP2482DS-LF-Z trades flexibility and efficiency for integration and cost - making LTC3824EMSE#TRPBF optimal for single-rail, high-efficiency, programmable industrial buck designs.
Availability
LTC3824EMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial 48V intermediate bus, and telecom remote radio unit applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3824EMSE#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 its high-performance power management portfolio with rigorous automotive and industrial qualification standards.
The LTC3824EMSE#TRPBF belongs to Linear's high-voltage DC/DC controller family, engineered specifically for ruggedized step-down regulation in environments with wide input transients, extreme temperatures, and stringent efficiency requirements.
FAQ
What is the maximum input voltage rating for the LTC3824EMSE#TRPBF?
The LTC3824EMSE#TRPBF has an absolute maximum input voltage rating of 65V on the VCC pin and operates continuously from 4V to 60V. This 60V operational limit makes it suitable for automotive load-dump conditions and industrial 48V systems without external clamping. Exceeding 65V risks permanent damage per Absolute Maximum Ratings.
How does Burst Mode operation reduce quiescent current in the LTC3824EMSE#TRPBF?
Burst Mode in the LTC3824EMSE#TRPBF reduces quiescent current to 40µA typical by disabling switching cycles when load current drops below ~1/3 of the programmed current limit. During sleep, the VC pin decays to ~70mV before triggering a burst of switching activity - minimizing gate drive and bias current consumption while maintaining regulation.
Can the LTC3824EMSE#TRPBF drive N-channel MOSFETs?
No, the LTC3824EMSE#TRPBF is specifically designed to drive external P-channel MOSFETs using high-side gate control. Its GATE pin sources current relative to VCC and clamps drive voltage to 8V below VCC - incompatible with N-MOSFET gate drive requirements. For N-MOSFET controllers, consider the LTC3891 or LTC3892 series.
What is the purpose of the CAP pin on the LTC3824EMSE#TRPBF?
The CAP pin on the LTC3824EMSE#TRPBF connects to a ≥0.1µF low-ESR capacitor tied to VCC, forming the output of an internal 8V regulator that powers the gate driver circuitry. This bypassing stabilizes gate drive voltage under transient loads and prevents coupling of switching noise into the bias rail - essential for clean MOSFET turn-on/turn-off.
Is the LTC3824EMSE#TRPBF pin-compatible with other members of the LTC3824 family?
Yes, all LTC3824 variants - including LTC3824EMSE#TRPBF, LTC3824IMSE#TRPBF, and LTC3824HMSE#TRPBF - share identical 10-lead MSE pinout, electrical functionality, and package dimensions. Only the temperature grade (E: –40°C to 125°C, H: –40°C to 150°C) and screening differ; no PCB layout changes are needed when substituting within the same package.
LTC3824EMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm 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 ~ 60V
- Frequency - Switching:
- 200kHz ~ 600kHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- No
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Frequency Control, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC3824EMSE#TRPBF FAQ
1.How can I place an order for LTC3824EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3824EMSE#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 LTC3824EMSE#TRPBF reliable?
The price and inventory of LTC3824EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3824EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3824EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3824EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3824EMSE#TRPBF?
LTC3824EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3824EMSE#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 LTC3824EMSE#TRPBF?
For technical support, including LTC3824EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3824EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3824EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3824EMSE#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 LTC3824EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3824EMSE#TRPBF?
All LTC3824EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3824EMSE#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 LTC3824EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3824EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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