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Analog Devices Inc. LTC3824HMSE#TRPBF
- Part No.:
- LTC3824HMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3824HMSE#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,357
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Product details
Overview
LTC3824HMSE#TRPBF from Analog Devices (formerly Linear Technology) is a high-voltage, constant-frequency current-mode step-down DC/DC controller designed to drive external P-channel MOSFETs. It operates from 4V to 60V input, delivers up to 2A output in typical 5V/2A buck configurations, features 40µA quiescent current in Burst Mode, and supports programmable switching frequency up to 600kHz - making it suitable for automotive load-dump-tolerant power supplies and industrial high-input-voltage systems.
For engineers reviewing the LTC3824HMSE#TRPBF datasheet, LTC3824HMSE#TRPBF pinout, LTC3824HMSE#TRPBF application, or LTC3824HMSE#TRPBF equivalent, key selection criteria include its –40°C to 150°C guaranteed junction temperature range, 10-lead MSE thermally enhanced MSOP package with exposed GND pad, 0.8V reference voltage with ±12mV accuracy over temperature, and precise 100mV current-sense threshold compatible with 0.025Ω sense resistors.
Technical Context
The LTC3824HMSE#TRPBF implements a transconductance error amplifier (gm = 220–370 µmho) controlling a current-mode PWM loop with fixed-frequency operation and cycle-by-cycle peak current limiting. Its gate driver delivers 2.5A peak source/sink into 10nF loads, with clamped 8V high-side drive (VCC > 9V) optimized for industrial P-channel MOSFETs.
Burst Mode operation is enabled by leaving SYNC/MODE open or pulling >2V, reducing quiescent current to 40µA while maintaining regulation via VC-based sleep/wake hysteresis (0.84V/0.04V). Frequency foldback to 50kHz activates when VFB drops below 0.5V - a short-circuit protection feature independent of synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports automotive battery transients including 60V load dump without external protection. |
| Quiescent Current (Burst Mode) | 40µA typical - enables multi-day battery runtime in always-on automotive modules. |
| Switching Frequency Range | 200kHz to 600kHz - programmable via RSET resistor; synchronizable to external clock above 230kHz. |
| Reference Voltage (VREF) | 0.788V to 0.816V (H-grade) - tight 1.6% initial accuracy ensures ±1% output voltage tolerance with standard resistor dividers. |
| Current Sense Threshold | 75mV to 120mV - factory-trimmed threshold allows accurate 3.3A current limit with 0.03Ω sense resistor. |
| Gate Drive Capability | 8V clamp at VCC > 9V, 2.5A peak - drives high-threshold P-MOSFETs (e.g., Si7465DP) with fast turn-on/turn-off. |
| Operating Junction Temp | –40°C to +150°C - fully specified and tested for under-hood automotive applications. |
Pinout & Package
The LTC3824HMSE#TRPBF is housed in a 10-lead plastic MSOP (MSE) package with exposed thermal pad (Pin 11), requiring soldering to PCB ground plane for θJC = 3°C/W thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 11) | Power and signal ground reference | Exposed pad (Pin 11) must be soldered to PCB ground plane for thermal and EMI integrity. |
| 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) | Oscillator frequency programming | Resistor to GND sets frequency: 392kΩ = 200kHz, 180kΩ = 400kHz, 200kΩ = 460kHz. |
| VC (Pin 4) | Error amplifier output & PWM control node | 0.7V threshold starts switching; <25mV triggers micropower shutdown (7µA). |
| VFB (Pin 5) | Inverting input of voltage error amplifier | Regulates output to 0.8V × (1 + RF1/RF2); <0.5V triggers 50kHz foldback for short-circuit protection. |
| SS (Pin 6) | Soft-start timing control | Capacitor to GND sets ramp time: tSS = (C × 0.8V)/5µA; resistor to GND resets capacitor during shutdown. |
| SENSE (Pin 7) | High-side current sense input | Measures (VCC − VSENSE) across external sense resistor; 100mV threshold sets current limit. |
| VCC (Pin 8) | IC power supply input | Must be bypassed with ≥33µF/100V input capacitor; powers internal regulator and gate driver. |
| GATE (Pin 9) | High-side P-MOSFET gate driver output | Delivers 2.5A peak current; clamped to 8V below VCC when VCC > 9V for robust MOSFET drive. |
| CAP (Pin 10) | Internal regulator bypass | Requires ≥0.1µF low-ESR ceramic capacitor to VCC to stabilize gate driver bias voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40µA in Burst Mode extends battery life in always-on automotive ECUs without compromising start-up behavior. |
| 100% duty cycle capability | Enables very low dropout operation - critical for cold-crank scenarios where VIN may dip to 4V while maintaining regulated output. |
| Programmable current limit | Set via external sense resistor (e.g., 0.025Ω for 4A limit), enabling precise overcurrent protection without trimming. |
| Thermally enhanced MSE package | 10-lead MSOP with exposed GND pad achieves θJC = 3°C/W - reduces junction temperature rise by >40°C vs standard MSOP. |
| Short-circuit foldback | Automatic reduction to 50kHz switching when VFB < 0.5V limits inductor current runaway during output shorts. |
Applications
| Automotive Power Supply | Industrial High-Voltage DC/DC |
|---|---|
|
Use Scenario: 12V battery-powered ADAS camera module requiring stable 5V/2A output during 60V load dump events. IC Role / Device Role / Timing Role: Primary step-down controller managing P-MOSFET switch timing, current sensing, and Burst Mode transitions to maintain regulation under wide VIN transients. Use Value: Guaranteed operation up to 150°C junction temperature and 60V input withstand eliminates need for external TVS or pre-regulator stages. |
Use Scenario: Factory automation PLC I/O module powered from 48V DC bus, needing isolated 5V/1A for microcontroller and sensors. IC Role / Device Role / Timing Role: Constant-frequency current-mode controller delivering precise 5V output with programmable soft-start and synchronization to system clock. Use Value: 200–600kHz programmability enables optimal trade-off between efficiency and EMI filtering size in space-constrained enclosures. |
| Telecom Distributed Power | Test Equipment Power Rail |
|
Use Scenario: 48V telecom shelf supplying 3.3V/3A to FPGA-based line cards with strict ripple and transient response requirements. IC Role / Device Role / Timing Role: High-efficiency buck controller implementing Burst Mode for standby power and full-frequency PWM for active load conditions. Use Value: 40µA quiescent current reduces no-load power loss to <250µW - critical for energy-efficient network infrastructure. |
Use Scenario: Bench power supply auxiliary rail generating 12V/2A for DUT biasing, requiring fast load-step response and low noise. IC Role / Device Role / Timing Role: Precision voltage controller using 0.8V reference and current-mode loop for <1% output regulation and <50µs transient recovery. Use Value: Programmable soft-start (via SS pin) prevents inrush current damage to sensitive DUTs during power-up sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3891EMSE#TRPBF | Dual-output controller with integrated 5V LDO bias rail; higher 75µA Burst Mode IQ; supports N-channel MOSFETs. | Preferred for dual-rail systems (e.g., 5V + 3.3V) where bias supply integration reduces BOM count. | Select LTC3891 when dual outputs or integrated bias are required; LTC3824HMSE#TRPBF remains optimal for single-rail, P-MOSFET, ultra-low-IQ designs. |
| LM5116MH/NOPB | 60V input, N-channel controller; 100µA IQ; no Burst Mode; requires bootstrap capacitor and external high-side driver. | Suitable for cost-sensitive industrial supplies where N-MOSFETs offer lower RDS(on) but layout complexity is acceptable. | Choose LM5116 for N-MOSFET-based designs needing higher efficiency at medium loads; LTC3824HMSE#TRPBF excels in low-IQ, P-MOSFET simplicity, and automotive temp range. |
Compared with LTC3891EMSE#TRPBF and LM5116MH/NOPB, the LTC3824HMSE#TRPBF uniquely combines –40°C to 150°C guaranteed operation, 40µA Burst Mode IQ, and P-MOSFET drive simplicity in a thermally optimized MSE package - making it the most direct solution for automotive and harsh-environment single-output buck controllers.
Availability
LTC3824HMSE#TRPBF is available at Aetrix Electronics and suitable for automotive power supplies, industrial high-voltage DC/DC converters, and telecom distributed power systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3824HMSE#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 legacy high-performance power management portfolio with rigorous automotive and industrial qualification standards.
The LTC3824HMSE#TRPBF belongs to Linear's high-voltage current-mode controller product line, engineered specifically for ruggedized buck conversion in automotive, industrial, and telecom applications demanding wide VIN, low IQ, and extended temperature reliability.
FAQ
What is the maximum input voltage rating for the LTC3824HMSE#TRPBF?
The LTC3824HMSE#TRPBF has an absolute maximum input voltage rating of 65V on the VCC pin and is fully operational across 4V to 60V. This 60V operating range accommodates automotive load-dump transients per ISO 7637-2, eliminating the need for external clamping in most vehicle applications. The device maintains regulation and protection features - including current limit and foldback - throughout this range.
Does the LTC3824HMSE#TRPBF support synchronization to an external clock?
Yes, the LTC3824HMSE#TRPBF supports external synchronization via the SYNC/MODE pin (Pin 2). It accepts TTL/CMOS-compatible pulses with 10–70% duty cycle and a minimum frequency of 230kHz (at RSET = 392kΩ) up to 600kHz. Synchronization disables Burst Mode and forces continuous PWM operation, enabling EMI reduction through frequency dithering or alignment with system clocks.
What is the purpose of the CAP pin on the LTC3824HMSE#TRPBF?
The CAP pin (Pin 10) on the LTC3824HMSE#TRPBF provides a dedicated bypass connection for the internal gate driver regulator. A minimum 0.1µF low-ESR ceramic capacitor must be placed between CAP and VCC to stabilize the 8V gate drive bias voltage, ensuring consistent 2.5A peak source/sink capability and preventing oscillation during high-speed MOSFET switching.
How does the LTC3824HMSE#TRPBF implement short-circuit protection?
The LTC3824HMSE#TRPBF implements short-circuit protection by monitoring the VFB pin: when VFB falls below 0.5V - indicating severe output overload or short - the controller automatically reduces switching frequency to 50kHz. This foldback mode limits inductor current buildup and prevents thermal runaway while maintaining basic regulation, providing safe fault handling without latch-off or external circuitry.
What is the guaranteed operating temperature range for the LTC3824HMSE#TRPBF?
The LTC3824HMSE#TRPBF is guaranteed to operate over a junction temperature range of –40°C to +150°C, verified by full testing (not just characterization). This H-grade qualification makes it suitable for under-hood automotive applications, industrial motor drives, and other environments where ambient temperatures exceed 125°C - unlike E- or I-grade variants limited to 125°C.
LTC3824HMSE#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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC3824HMSE#TRPBF FAQ
1.How can I place an order for LTC3824HMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3824HMSE#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 LTC3824HMSE#TRPBF reliable?
The price and inventory of LTC3824HMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3824HMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3824HMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3824HMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3824HMSE#TRPBF?
LTC3824HMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3824HMSE#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 LTC3824HMSE#TRPBF?
For technical support, including LTC3824HMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3824HMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3824HMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3824HMSE#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 LTC3824HMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3824HMSE#TRPBF?
All LTC3824HMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3824HMSE#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 LTC3824HMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3824HMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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