My Inquiry
My Account
Analog Devices Inc. LT8604IDDBM#TRMPBF
- Part No.:
- LT8604IDDBM#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT8604IDDBM#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 120MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,160
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8604IDDBM#TRMPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 120mA output at up to 2.2MHz switching frequency, with 42V max input voltage, 2.5µA quiescent current in Burst Mode, and internal compensation. It serves as a compact housekeeping supply in automotive and industrial sensor systems requiring high efficiency at light loads.
For engineers reviewing the LT8604IDDBM#TRMPBF datasheet, LT8604IDDBM#TRMPBF pinout, LT8604IDDBM#TRMPBF application, or LT8604IDDBM#TRMPBF equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (Burst Mode only), real-world efficiency curves at 12V–36V input, and precise thermal and electrical specifications per Rev. C datasheet.
Technical Context
The LT8604IDDBM#TRMPBF implements constant-frequency current-mode control with internal top/bottom NMOS power switches, 35ns minimum on-time, and frequency foldback during startup or overload. It lacks SYNC/MODE and HYST pins-unlike the LT8604C-so forced continuous mode, spread spectrum, and external synchronization are not supported.
It features an internal 0.778V feedback reference, ±7.5% power-good threshold accuracy, ultralow 1.7µA no-load input current (typical), and BIAS pin optimization for >3.2V output voltages. Thermal shutdown activates at 150°C junction temperature, and UVLO triggers at 2.9V (min) on VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.2V to 42V - supports wide-range industrial and automotive battery inputs including cold-crank transients. |
| Output Current | Up to 120mA - sufficient for powering microcontrollers, sensors, and analog front-ends in space-constrained designs. |
| Quiescent Current | 2.5µA at 24VIN → 3.3VOUT - enables multi-year battery life in always-on IoT and sensor nodes. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows small external inductors (e.g., 33µH) and low-profile layouts. |
| Feedback Reference | 0.778V ±1.6% - enables accurate output regulation across temperature with minimal external resistor tolerance impact. |
| Power-Good Threshold | ±7.5% of VOUT - provides reliable system reset signaling without external comparators. |
| Min On-Time | 35ns - supports high step-down ratios (e.g., 36VIN → 3.3VOUT) at 2MHz without pulse-skipping instability. |
Pinout & Package
LT8604IDDBM#TRMPBF uses a 10-lead 3mm × 2mm plastic side-wettable DFN package (DDBM) with exposed thermal pad (Pin 11 = GND). The package is rated for –40°C to 125°C operation and features θJA = 76°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap Supply | Drives top NMOS gate above VIN; requires 47nF ceramic capacitor placed adjacent to IC for reliable high-side switching. |
| SW | Switch Node | Connection point to inductor; must be minimized in PCB area to reduce EMI and switching losses. |
| BIAS | Internal Regulator Input | When tied to VOUT ≥3.2V, reduces VIN supply current and improves efficiency; bypass with 1µF ceramic if externally powered. |
| INTVCC | Internal 3.4V Rail | Supplies gate drivers and control logic; decoupled with ≥1µF ceramic to GND; not for external loading. |
| RT | Frequency Set | Resistor to GND sets switching frequency (200kHz–2.2MHz); value determines timing accuracy and EMI profile. |
| FB | Feedback Input | Sensed at 0.778V reference; connects to resistor divider from VOUT to set output voltage precisely. |
| TR/SS | Soft-Start/Tracking | Controls output ramp rate via capacitor; pulled low during fault/shutdown; enables sequencing with other rails. |
| PG | Power-Good Flag | Open-drain output asserted high when VOUT is within ±7.5% of target and no faults exist. |
| EN/UV | Enable/Undervoltage Lockout | Hysteretic enable threshold (1.04V rising / 1.00V falling); used for input monitoring or system-level enable control. |
| VIN | Main Input Supply | Supplies internal circuitry and top switch; requires local high-frequency ceramic bypass (≥10µF) near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Quiescent Current | 2.5µA IQ regulating 24VIN → 3.3VOUT - extends battery runtime in always-on sensor nodes without compromising regulation. |
| High-Speed Switching | 35ns minimum on-time enables 2.2MHz operation even at 36VIN → 3.3VOUT - reduces inductor size and solution footprint. |
| Integrated Power Switches | Top/bottom NMOS with 3.2Ω/1.2Ω RDS(on) - eliminates need for external MOSFETs and gate drivers, simplifying layout and BOM. |
| Internal Compensation | Single-pole compensation network embedded - removes external compensation components and ensures stable loop response. |
| Robust Protection | Thermal shutdown (150°C), PG flag, and UVLO (2.9V min) - provides fail-safe operation in harsh environments without external supervision. |
Applications
| Automotive Housekeeping Supplies | Industrial Sensors |
|---|---|
|
Use Scenario: Powering CAN transceiver, LIN interface, and microcontroller in automotive body control modules where input voltage varies from 5V (start-stop) to 42V (load dump). IC Role / Device Role / Timing Role: Primary 3.3V/5V housekeeping regulator providing clean, regulated bias for communication ICs and MCU peripherals. Use Value: 2.5µA quiescent current prevents battery drain during vehicle sleep mode; 42V input rating withstands ISO 7637-2 pulse 5a. |
Use Scenario: Supplying precision analog sensors (e.g., pressure, temperature) in factory automation equipment with wide ambient temperature range. IC Role / Device Role / Timing Role: Low-noise, high-efficiency step-down converter delivering stable 3.3V to ADC references and signal conditioning circuits. Use Value: <10mVP-P output ripple and ±7.5% PG accuracy ensure measurement integrity; internal compensation avoids tuning delays. |
| 4–20mA Current Loops | Flow Meters |
|
Use Scenario: Providing isolated or non-isolated 5V rail for loop-powered transmitter electronics in process control instrumentation. IC Role / Device Role / Timing Role: Compact, high-efficiency DC/DC stage converting 24V loop supply to regulated 5V for op-amps, DACs, and microcontrollers. Use Value: 120mA output capacity supports active loop drivers; 3.2V–42V input accommodates brownout and surge conditions per IEC 61000-4-5. |
Use Scenario: Powering ultrasonic or electromagnetic flow meter electronics deployed in water/wastewater treatment plants with variable input voltage. IC Role / Device Role / Timing Role: Primary regulator for digital signal processor, display driver, and sensor excitation circuitry in sealed, space-limited enclosures. Use Value: 2mm × 3mm DFN package fits tight mechanical envelopes; AEC-Q100 qualified variants available for extended reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8604EDDBM#TRMPBF | Same silicon, –40°C to 125°C temp grade (vs. I-grade –40°C to 125°C); identical electrical specs and pinout. | No functional difference; suitable for commercial/industrial use where extended temp qualification is not required. | Select when full automotive qualification is unnecessary and cost sensitivity favors standard grade. |
| LT8604JDDBM#TRMPBF | Same silicon, –40°C to 150°C junction rating (J-grade); higher thermal limit enables operation in under-hood automotive zones. | Required for engine bay or high-ambient industrial locations exceeding 125°C ambient; same footprint and design-in effort. | Choose for extreme-temperature deployments where thermal margin is critical and J-grade qualification is mandated. |
Compared with LT8604EDDBM#TRMPBF and LT8604JDDBM#TRMPBF, the LT8604IDDBM#TRMPBF offers identical performance and pin compatibility but is specifically characterized and guaranteed over the full –40°C to 125°C junction range-making it optimal for industrial control and automotive cabin applications demanding consistent behavior across temperature extremes.
Availability
LT8604IDDBM#TRMPBF is available at Aetrix Electronics and suitable for automotive housekeeping supplies, industrial sensors, and 4–20mA current loop transmitters requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LT8604IDDBM#TRMPBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8604 series belongs to Analog Devices' µModule®-adjacent monolithic DC/DC regulator product line, designed specifically for space-constrained, high-efficiency power conversion in automotive and industrial edge devices where low IQ and wide VIN range are critical.
FAQ
What is the maximum input voltage rating for the LT8604IDDBM#TRMPBF?
The LT8604IDDBM#TRMPBF has an absolute maximum input voltage rating of 42V, with guaranteed operation from 3.2V to 42V. This makes it suitable for automotive battery systems subject to load dump transients and industrial 24V/36V rails with wide variation. Operation above 42V risks permanent damage per Absolute Maximum Ratings.
Does the LT8604IDDBM#TRMPBF support forced continuous mode (FCM)?
No, the LT8604IDDBM#TRMPBF does not support forced continuous mode. It is the base LT8604 variant-not the LT8604C-and lacks the SYNC/MODE pin required for FCM selection. It operates exclusively in Burst Mode for ultralow IQ, with automatic transition between burst and PWM-like regulation based on load.
What is the purpose of the BIAS pin on the LT8604IDDBM#TRMPBF?
The BIAS pin on the LT8604IDDBM#TRMPBF allows the internal regulator to draw supply current from VOUT instead of VIN when VOUT ≥3.2V, reducing overall input current and improving efficiency. For a 3.3V or 5V output, tie BIAS directly to VOUT; for lower outputs, connect to GND and bypass INTVCC with ≥1µF ceramic.
Can the LT8604IDDBM#TRMPBF be synchronized to an external clock?
No, the LT8604IDDBM#TRMPBF cannot be synchronized to an external clock. Synchronization capability is exclusive to the LT8604C variant, which includes the SYNC/MODE pin. The LT8604IDDBM#TRMPBF uses an internal oscillator only and supports RT-resistor programming of frequency from 200kHz to 2.2MHz.
What is the power-good (PG) accuracy specification for the LT8604IDDBM#TRMPBF?
The LT8604IDDBM#TRMPBF asserts the open-drain PG pin when the FB voltage is within ±7.5% of the 0.778V reference-corresponding to ±7.5% of the programmed output voltage. This threshold is specified over temperature and ensures reliable system power sequencing without external supervision circuitry.
LT8604IDDBM#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.2V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.78V
- Voltage - Output (Max):
- 42V
- Current - Output:
- 120mA
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 10-DFN (3x2)
LT8604IDDBM#TRMPBF FAQ
1.How can I place an order for LT8604IDDBM#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8604IDDBM#TRMPBF 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 LT8604IDDBM#TRMPBF reliable?
The price and inventory of LT8604IDDBM#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8604IDDBM#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8604IDDBM#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8604IDDBM#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8604IDDBM#TRMPBF?
LT8604IDDBM#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8604IDDBM#TRMPBF 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 LT8604IDDBM#TRMPBF?
For technical support, including LT8604IDDBM#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8604IDDBM#TRMPBF requirements.
6.How does Aetrix verify that LT8604IDDBM#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8604IDDBM#TRMPBF 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 LT8604IDDBM#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8604IDDBM#TRMPBF?
All LT8604IDDBM#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8604IDDBM#TRMPBF, 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 LT8604IDDBM#TRMPBF part is unused and in its original packaging.
Return procedure for LT8604IDDBM#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8604IDDBM#TRMPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
