My Inquiry
My Account
Analog Devices Inc. LT8604EDDBM#TRMPBF
- Part No.:
- LT8604EDDBM#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT8604EDDBM#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 120MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:825
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8604EDDBM#TRMPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 120mA output at up to 42V input, 2.2MHz switching frequency, and 2.5µA quiescent current in Burst Mode. It features internal top/bottom NMOS switches, 0.778V feedback reference, and operates across –40°C to 125°C for industrial sensor and 4–20mA loop power supplies.
For engineers reviewing the LT8604EDDBM#TRMPBF datasheet, LT8604EDDBM#TRMPBF pinout, LT8604EDDBM#TRMPBF application, or LT8604EDDBM#TRMPBF equivalent, key selection criteria include ultralow IQ regulation at 24VIN→3.3VOUT, 35ns minimum on-time, ±7.5% PG accuracy, and DFN-10 side-wettable package compatibility with automated optical inspection (AOI).
Technical Context
The LT8604EDDBM#TRMPBF implements constant-frequency current-mode control with internal slope compensation and frequency foldback during start-up or overload. Its architecture integrates top (3.2Ω) and bottom (1.2Ω) NMOS power switches, eliminating external drivers while supporting adjustable switching frequency (200kHz–2.2MHz) via RT resistor.
Unlike the LT8604C variant, this part lacks SYNC/MODE and HYST pins and operates exclusively in Burst Mode-no forced continuous mode or spread-spectrum capability. It uses EN/UV with 1.04V rising threshold and 40mV hysteresis, and PG asserts when FB deviates >±7.5% from 0.778V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.2V to 42V - supports wide industrial and automotive supply rails without pre-regulation. |
| Max Output Current | 120mA - sufficient for powering low-power sensors, transmitters, and bias rails in 4–20mA loops. |
| Quiescent Current | 2.5µA at 24VIN → 3.3VOUT - enables multi-year battery life in always-on IoT edge nodes. |
| Switching Frequency | 200kHz to 2.2MHz - selectable via RT resistor; high end allows ultra-small 2.2µH inductors and <10mVP-P ripple. |
| Feedback Reference | 0.778V ±16mV - precise internal reference enabling accurate output voltage setting with standard resistor tolerances. |
| Min On-Time | 35ns - supports high VIN/VOUT ratios (e.g., 42V→3.3V) at 2.2MHz without pulse-skipping instability. |
| PG Accuracy | ±7.5% of VOUT - provides reliable power-good signaling for microcontroller reset sequencing and fault detection. |
Pinout & Package
LT8604EDDBM#TRMPBF uses a 10-lead (3mm × 2mm) plastic side-wettable DFN package (DDBM) with exposed thermal pad (Pin 11 = GND). The package supports AOI and improves thermal performance (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 stable high-side switching. |
| SW | Switch Node | Connects directly to inductor; must be minimized in PCB area to reduce EMI and switching losses. |
| BIAS | Bias Supply Input | When tied to VOUT ≥3.3V, reduces VIN supply current; bypass with 1µF ceramic if driven externally. |
| INTVCC | Internal Regulator Bypass | Decoupled with ≥1µF ceramic; powers internal logic and drivers; sourcing limited to 2mA. |
| RT | Frequency Set | Resistor to GND sets fSW from 200kHz to 2.2MHz; tolerance directly impacts frequency accuracy. |
| FB | Feedback Input | Regulated to 0.778V; connects to resistor divider; ±20nA input current minimizes divider error. |
| TR/SS | Soft-Start/Tracking | 2µA internal pull-up enables capacitor-programmed slew rate; pulled low during fault for safe shutdown. |
| PG | Power-Good Flag | Open-drain output active high when VOUT within ±7.5%; valid only when VIN >3.2V. |
| EN/UV | Enable/Undervoltage Lockout | Hysteretic input (1.04V rise / 1.00V fall); enables VIN monitoring via external resistor divider. |
| VIN | Main Power Input | Supplies internal circuitry and top switch; requires local high-frequency ceramic bypass near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Quiescent Current | 2.5µA IQ at 24VIN→3.3VOUT enables energy harvesting and battery-powered operation for >10 years. |
| Integrated Power Switches | Top (3.2Ω) and bottom (1.2Ω) NMOS eliminate external MOSFETs and gate drivers, reducing BOM count by ≥4 components. |
| Internal Compensation | Eliminates external compensation network; simplifies design and ensures stability across all operating conditions. |
| Output Soft-Start & Tracking | TR/SS pin supports controlled ramp-up and seamless voltage sequencing with other rails in multi-rail systems. |
| AEC-Q100 Qualified | Grade E (–40°C to 125°C) qualification confirms reliability for automotive housekeeping and under-hood sensors. |
Applications
| Industrial Sensor Power | 4–20mA Current Loop |
|---|---|
|
Use Scenario: Powering MEMS pressure sensors and thermocouple amplifiers in harsh factory environments with 24V DC supply rails. IC Role / Device Role / Timing Role: Primary 3.3V/5V point-of-load regulator providing clean, low-noise bias for analog front-ends and ADC references. Use Value: 2.5µA quiescent current extends battery life in wireless sensor nodes; 35ns min on-time supports direct 24V→3.3V conversion without intermediate stages. |
Use Scenario: Generating stable 5V rail for HART modem ICs and loop-powered transmitter circuitry. IC Role / Device Role / Timing Role: Isolated auxiliary supply for digital communication interface, decoupled from main loop current path. Use Value: ±7.5% PG flag ensures reliable HART signal integrity by preventing modem activation until VOUT stabilizes; Burst Mode maintains efficiency across 4–20mA load range. |
| Flow Meter Electronics | Automotive Housekeeping |
|
Use Scenario: Powering ultrasonic time-of-flight measurement circuits and microcontrollers in smart water/gas meters. IC Role / Device Role / Timing Role: High-efficiency buck converter supplying 3.3V to MCU and analog signal chain with minimal thermal footprint. Use Value: Side-wettable DFN package enables AOI inspection for high-reliability meter production; AEC-Q100 qualification supports extended temperature operation in outdoor enclosures. |
Use Scenario: Providing 5V bias for CAN transceivers, LIN controllers, and body electronics in passenger vehicles. IC Role / Device Role / Timing Role: Secondary power rail generator for non-safety-critical subsystems requiring robust undervoltage protection. Use Value: EN/UV hysteresis (40mV) prevents oscillation during cold-cranking; 42V absolute max rating withstands load-dump transients per ISO 7637-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8604IDDBM#TRMPBF | Same electrical specs but rated for –40°C to 125°C with tighter initial parametric testing over full temp range. | Suitable for higher-reliability industrial automation where extended characterization is required. | Select when full-temperature-range guaranteed specs (e.g., FB line regulation, min on-time) are mandatory for safety-critical firmware. |
| LT8604JDDBM#TRMPBF | Rated for –40°C to 150°C junction temperature; same package and pinout; higher thermal stress screening. | Required for under-hood automotive applications exceeding 125°C ambient, such as engine control modules. | Choose only when operating junction temperature exceeds 125°C; otherwise, LT8604EDDBM#TRMPBF offers optimal cost/performance balance. |
Compared with LT8604IDDBM#TRMPBF and LT8604JDDBM#TRMPBF, the LT8604EDDBM#TRMPBF provides identical functionality and pinout at the lowest cost tier, making it ideal for commercial- and industrial-grade designs where full-temperature characterization or extreme thermal ratings are unnecessary.
Availability
LT8604EDDBM#TRMPBF is available at Aetrix Electronics and suitable for industrial sensors, 4mA to 20mA current loops, and flow meter electronics requiring stable component supply with full traceability and no obsolescence risk.
Supply support for LT8604EDDBM#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 power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8604 series belongs to Analog Devices' µModule®-adjacent monolithic DC/DC portfolio, designed specifically for space-constrained, low-IQ industrial and automotive power applications demanding high input voltage tolerance and robust fault protection.
FAQ
What is the maximum input voltage supported by the LT8604EDDBM#TRMPBF?
The LT8604EDDBM#TRMPBF supports an absolute maximum input voltage of 42V, with recommended operation from 3.2V to 42V. This wide range enables direct connection to unregulated 24V industrial rails and automotive batteries, including transient-tolerant operation during load-dump events per ISO 7637-2 when properly protected with external TVS diodes.
Does the LT8604EDDBM#TRMPBF support forced continuous mode (FCM)?
No, the LT8604EDDBM#TRMPBF does not support forced continuous mode. It is the base LT8604 variant and operates exclusively in Burst Mode to achieve ultralow quiescent current (2.5µA). Forced continuous mode and SYNC/MODE functionality are exclusive to the LT8604C family (e.g., LT8604CAV#TRMPBF), which uses a different pinout and LQFN package.
What is the purpose of the BIAS pin on the LT8604EDDBM#TRMPBF?
The BIAS pin on the LT8604EDDBM#TRMPBF allows the IC to draw bias current from the output rail instead of VIN when VOUT ≥3.3V, reducing overall system power loss. For a 3.3V or 5V output, tie BIAS directly to VOUT; for outputs below 3.3V, connect BIAS to GND. A 1µF ceramic capacitor is required if BIAS is driven from an external source.
How does the PG (Power-Good) pin function on the LT8604EDDBM#TRMPBF?
The PG pin on the LT8604EDDBM#TRMPBF is an open-drain output that goes high only when the FB voltage is within ±7.5% of 0.778V and no fault (e.g., thermal shutdown or UVLO) is present. PG is valid when VIN >3.2V regardless of EN/UV state, enabling reliable microcontroller reset assertion and system-level power sequencing in industrial control units.
Can the LT8604EDDBM#TRMPBF be used in automotive applications?
Yes-the LT8604EDDBM#TRMPBF is AEC-Q100 qualified (Grade E, –40°C to 125°C) and specified for automotive housekeeping supplies. It meets stringent reliability requirements for non-safety-critical subsystems such as infotainment power rails, body control modules, and sensor interfaces, provided board layout follows Analog Devices' thermal and EMI guidelines in the datasheet.
LT8604EDDBM#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)
LT8604EDDBM#TRMPBF FAQ
1.How can I place an order for LT8604EDDBM#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8604EDDBM#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 LT8604EDDBM#TRMPBF reliable?
The price and inventory of LT8604EDDBM#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8604EDDBM#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8604EDDBM#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8604EDDBM#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8604EDDBM#TRMPBF?
LT8604EDDBM#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8604EDDBM#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 LT8604EDDBM#TRMPBF?
For technical support, including LT8604EDDBM#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8604EDDBM#TRMPBF requirements.
6.How does Aetrix verify that LT8604EDDBM#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8604EDDBM#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 LT8604EDDBM#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8604EDDBM#TRMPBF?
All LT8604EDDBM#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8604EDDBM#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 LT8604EDDBM#TRMPBF part is unused and in its original packaging.
Return procedure for LT8604EDDBM#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8604EDDBM#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…
