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Analog Devices Inc. LTC3824IMSE#TRPBF
- Part No.:
- LTC3824IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3824IMSE#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,755
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Product details
Overview
LTC3824IMSE#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 - ideal for automotive load-dump-tolerant power supplies and industrial 12V/2A distributed converters.
For engineers reviewing the LTC3824IMSE#TRPBF datasheet, LTC3824IMSE#TRPBF pinout, LTC3824IMSE#TRPBF application, or LTC3824IMSE#TRPBF equivalent, key selection criteria include its 10-lead MSE package thermal performance, 8V gate drive capability for high-side P-MOSFETs, 0.8V reference voltage with ±1.5% accuracy over temperature, current limit threshold of 100mV across VCC–VSENSE, and Burst Mode enable/disable via SYNC/MODE pin logic level.
Technical Context
The LTC3824IMSE#TRPBF implements a transconductance error amplifier (gm = 220–370 µmho) regulating output voltage via feedback at VFB, while its current-mode PWM loop uses VC as the control signal - switching initiates at VC ≥ 0.7V and shuts down when VC ≤ 25mV. The internal oscillator sets frequency via RSET (200–600kHz), with foldback to 50kHz if VFB drops below 0.5V during short-circuit events.
Its gate driver delivers 2.5A peak source/sink into 10nF loads, clamping GATE high to VCC–8V (for VCC > 9V) and low to VCAP–0.5V, powered by an internal regulator stabilized by a minimum 0.1µF CAP-to-VCC capacitor. Burst Mode operation - enabled by leaving SYNC/MODE open or >2V - reduces quiescent current to 40µA by cycling sleep/awake states based on VC threshold hysteresis (0.84V rising, 0.80V falling).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports automotive battery systems including 12V/24V rails and transient load-dump conditions up to 60V. |
| Quiescent Current (Burst Mode) | 40µA typical - enables multi-day battery runtime in always-on automotive modules and IoT edge sensors. |
| Switching Frequency Range | 200kHz to 600kHz - programmable via RSET resistor; allows EMI optimization and inductor size reduction. |
| Reference Voltage | 0.788V to 0.816V (I-grade) - tight 1.5% tolerance ensures stable 5V/12V output regulation across –40°C to 125°C. |
| Current Limit Threshold | 75mV to 120mV (VCC–VSENSE) - sets maximum inductor current via external sense resistor (e.g., 0.025Ω → 3.3A limit). |
| Gate Drive Capability | 8V clamp (VCC–VCAP), 2.5A peak - drives high-threshold P-MOSFETs (e.g., Si7465DP) with fast turn-on/turn-off in high-side buck topologies. |
| Soft-Start Current | 3µA to 8µA - controls ramp rate of output voltage via SS capacitor; prevents inrush current in sensitive downstream circuitry. |
Pinout & Package
Package: 10-lead thermally enhanced MSOP (MSE), exposed pad (Pin 11) soldered to PCB ground plane for θJC = 3°C/W thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1, Pin 11) | Power and signal ground reference | Exposed pad must be soldered to large copper area for thermal dissipation and noise immunity. |
| SYNC/MODE (Pin 2) | Burst Mode enable/disable & sync input | Open or >2V enables Burst Mode; grounded or active sync pulse disables it and forces pulse-skipping. |
| RSET (Pin 3) | Oscillator frequency programming | Resistor to GND sets switching frequency (e.g., 392kΩ → 200kHz; 180kΩ → 400kHz). |
| VC (Pin 4) | Error amplifier output & PWM control node | 0.7V threshold starts switching; <25mV triggers micropower shutdown; 0.84V/0.80V hysteresis governs Burst Mode entry/exit. |
| VFB (Pin 5) | Inverting input of voltage error amplifier | Connected to resistor divider; regulates output to 0.8V × (1 + RF1/RF2); <0.5V triggers 50kHz foldback. |
| 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 voltage drop across external sense resistor (RS); sets current limit at 100mV/RS. |
| VCC (Pin 8) | IC supply input | Must be bypassed with low-ESR capacitor; powers internal regulator and gate driver bias circuitry. |
| GATE (Pin 9) | High-side P-MOSFET gate driver output | Delivers 2.5A peak current; clamped to VCC–8V for VCC > 9V; requires careful layout to minimize ringing. |
| CAP (Pin 10) | Internal regulator bypass | Minimum 0.1µF low-ESR capacitor to VCC stabilizes gate driver bias voltage and suppresses switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| 100% duty cycle operation | Enables ultra-low dropout regulation - critical for automotive cold-crank scenarios where VIN may dip to 4V while maintaining VOUT. |
| Programmable current limit | Set via external sense resistor (RS); independent of input/output voltage - simplifies overcurrent protection design across wide VIN range. |
| Easy synchronization | Accepts sync pulses from 230kHz to 600kHz (RSET-dependent); 1.3V rising-edge threshold enables robust clock tree integration. |
| Micropower shutdown | 7µA typical shutdown current - preserves battery energy in parked-vehicle systems and remote sensors. |
| Thermally enhanced MSE package | θJA = 43°C/W, θJC = 3°C/W - enables 2A continuous operation without heatsink in compact automotive PCB layouts. |
Applications
| Automotive Load-Dump Power Supply | Industrial 24V-to-12V Buck Converter |
|---|---|
|
Use Scenario: Powering infotainment head units during ISO 7637-2 load-dump transients (up to 60V, 100ms). IC Role / Device Role / Timing Role: High-voltage step-down controller driving P-MOSFET switch; regulates 12V/2A output with 100% duty cycle capability during low-VIN cranking. Use Value: Eliminates need for pre-regulator stages; withstands 60V transients without latch-up; 40µA Burst Mode extends battery life in accessory mode. |
Use Scenario: Converting 24V factory bus to isolated 12V for PLC I/O modules operating in harsh industrial environments. IC Role / Device Role / Timing Role: Constant-frequency current-mode controller synchronizing to system clock to reduce EMI in dense control cabinets. Use Value: 600kHz max switching enables small 33µH inductors; 8V gate drive ensures reliable P-MOSFET turn-on despite VGS degradation at high temperature. |
| Telecom Distributed Power System | Test Equipment Auxiliary Supply |
|
Use Scenario: Generating 5V/2A local supply from 48V telecom backplane in base station line cards. IC Role / Device Role / Timing Role: Primary buck controller with programmable soft-start to prevent inrush current during hot-swap insertion. Use Value: 0.8V reference with ±1.5% tolerance ensures precise 5V compliance; RSET-based frequency tuning avoids interference with data clock domains. |
Use Scenario: Providing clean 5V rail for analog front-end circuits in portable oscilloscopes and signal generators. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current controller minimizing standby power in battery-operated test gear. Use Value: 40µA Burst Mode extends single-charge runtime; CAP/VCC bypass network suppresses gate-drive noise coupling into sensitive analog sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3895EMSE#TRPBF | Wider VIN range (4.5V–150V), integrated N-MOSFET driver, higher 1.5A gate drive, but no Burst Mode (1.3mA IQ) | Suitable for ultra-high-voltage industrial systems (>60V), but less optimal for battery-powered designs requiring microamp IQ | Select LTC3895 for 150V input tolerance; retain LTC3824IMSE#TRPBF where 40µA IQ and P-MOSFET simplicity are mandatory |
| MP24894GQ-Z | Integrated 100V N-MOSFET, fixed 200kHz frequency, 1.2mA IQ, no programmable current limit or sync input | Lower BOM count for cost-sensitive 12V/1A applications, but lacks thermal robustness and precision current limiting of LTC3824 | Choose MP24894 for simple, low-cost 100V buck; prefer LTC3824IMSE#TRPBF when design requires adjustable frequency, Burst Mode, and accurate current sensing |
Compared with LTC3895EMSE#TRPBF and MP24894GQ-Z, the LTC3824IMSE#TRPBF uniquely balances ultra-low 40µA quiescent current, external P-MOSFET flexibility for high-side switching, and full programmability (frequency, soft-start, current limit) - making it optimal for automotive and industrial applications demanding both efficiency and design control.
Availability
LTC3824IMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC power supplies, and telecom distributed power architectures requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3824IMSE#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) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving aerospace, automotive, industrial, and communications markets with precision, reliability, and innovation.
The LTC3824IMSE#TRPBF belongs to Linear's high-voltage DC/DC controller product line, engineered specifically for ruggedized buck conversion in automotive and industrial environments where wide input range, low IQ, and thermal resilience are non-negotiable.
FAQ
What is the operating temperature range for the LTC3824IMSE#TRPBF?
The LTC3824IMSE#TRPBF is rated for –40°C to +125°C junction temperature. Its I-grade qualification ensures guaranteed performance across this full range, with thermal derating applied above 125°C per datasheet guidelines. The exposed pad (Pin 11) must be soldered to a thermal pad on the PCB to maintain θJC = 3°C/W and achieve specified thermal limits in continuous 2A operation.
How does the LTC3824IMSE#TRPBF implement Burst Mode operation?
The LTC3824IMSE#TRPBF enters Burst Mode when the SYNC/MODE pin is left open or pulled above 2V, reducing quiescent current to 40µA. In this mode, the controller cycles between active switching (VC ≥ 0.84V) and sleep (VC ≤ 0.80V), delivering energy bursts only as needed to maintain output regulation - significantly extending battery life in light-load conditions like automotive accessory mode.
Can the LTC3824IMSE#TRPBF drive N-channel MOSFETs?
No, the LTC3824IMSE#TRPBF is specifically designed to drive external P-channel MOSFETs in high-side buck configurations. Its gate driver architecture provides VCC-referenced high-side drive with 8V clamp and 2.5A peak current. For N-MOSFET high-side drive, a bootstrap or isolated gate driver is required - which the LTC3824IMSE#TRPBF does not integrate or support.
What is the minimum recommended capacitor value for the CAP pin on the LTC3824IMSE#TRPBF?
The LTC3824IMSE#TRPBF requires a minimum 0.1µF low-ESR ceramic capacitor between the CAP pin and VCC. This capacitor stabilizes the internal gate driver regulator and suppresses high-frequency noise generated during MOSFET switching. Larger values (e.g., 0.22µF) may improve noise immunity but are not required for basic functionality.
Does the LTC3824IMSE#TRPBF provide overvoltage protection?
Yes, the LTC3824IMSE#TRPBF includes adaptive overvoltage protection (OVP) tied to the VC voltage. In Burst Mode, OVP threshold is ~2% above VREF (≈0.816V); under heavier loads, it scales up to 8% above VREF (≈0.864V). This dynamic threshold maintains tight output regulation while preventing damage during transient overvoltage events at the FB node.
LTC3824IMSE#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
LTC3824IMSE#TRPBF FAQ
1.How can I place an order for LTC3824IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3824IMSE#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 LTC3824IMSE#TRPBF reliable?
The price and inventory of LTC3824IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3824IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3824IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3824IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3824IMSE#TRPBF?
LTC3824IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3824IMSE#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 LTC3824IMSE#TRPBF?
For technical support, including LTC3824IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3824IMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3824IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3824IMSE#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 LTC3824IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3824IMSE#TRPBF?
All LTC3824IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3824IMSE#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 LTC3824IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3824IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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