My Inquiry
My Account
Analog Devices Inc. LT8604IDDBM#TRPBF
- Part No.:
- LT8604IDDBM#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT8604IDDBM#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 120MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,451
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8604IDDBM#TRPBF from Analog Devices is a high-efficiency, 42V input, 120mA synchronous step-down DC/DC converter in a 10-lead 3mm × 2mm side-wettable DFN package. It delivers regulated 5V output with <2.5µA quiescent current in Burst Mode, 35ns minimum on-time, and operates up to 2.2MHz - ideal for space-constrained industrial sensor and 4–20mA loop power supplies.
For engineers reviewing the LT8604IDDBM#TRPBF datasheet, LT8604IDDBM#TRPBF pinout, LT8604IDDBM#TRPBF application, or LT8604IDDBM#TRPBF equivalent, key selection criteria include ultralow IQ at light loads, AEC-Q100-compliant thermal performance (–40°C to 125°C), fixed-frequency current-mode control, and compatibility with external RT resistor programming (200kHz–2.2MHz).
Technical Context
The LT8604IDDBM#TRPBF implements constant-frequency peak-current-mode control with internal compensation, frequency foldback during startup/overload, and integrated top/bottom NMOS power switches (3.2Ω/1.2Ω typical RDS(on)). It lacks SYNC/MODE and HYST pins - distinguishing it from the LT8604C variant - and defaults exclusively to Burst Mode operation.
Its EN/UV pin features 1.04V rising threshold with 40mV hysteresis, enabling precise input UVLO setting via external divider. The PG flag asserts low when FB deviates >±7.5% from 0.778V reference or during fault, and remains valid above 3.2V VIN regardless of EN/UV state.
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. |
| Output Current | Up to 120mA - sufficient for powering microcontrollers, sensors, and analog front-ends in low-power systems. |
| Quiescent Current | 2.5µA at 24VIN → 3.3VOUT - enables multi-year battery life in always-on IoT endpoints. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows optimization of size vs. EMI; no external synchronization capability. |
| Feedback Reference | 0.778V ±1.6% - enables accurate output regulation across temperature and line/load conditions. |
| Minimum On-Time | 35ns - supports high step-down ratios (e.g., 42V→3.3V) at 2MHz without pulse-skipping instability. |
| Package | 10-lead 3mm × 2mm side-wettable DFN - enables automated optical inspection (AOI) and robust solder joint reliability. |
Pinout & Package
LT8604IDDBM#TRPBF uses a 10-lead plastic DFN (DDBM) package with exposed thermal pad (Pin 11 = GND). Pin functions are validated per Analog Devices Rev. C datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor connection | Drives top NMOS gate above VIN; requires 47nF ceramic cap placed adjacent to IC for reliable 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 current draw and improves efficiency; bypass with 1µF ceramic. |
| INTVCC | Internal 3.4V regulator bypass | Must be decoupled with ≥1µF low-ESR ceramic to ground; powers internal logic and gate drivers. |
| RT | Frequency setting resistor | 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 to set output voltage; high-impedance (±20nA leakage). |
| TR/SS | Soft-start/tracking control | 2µA internal pull-up enables capacitor-based slew rate control; pulled low during fault/shutdown. |
| PG | Power good open-drain | Signals VOUT within ±7.5% of target; active-low, requires external pull-up; valid above 3.2V VIN. |
| EN/UV | Enable/undervoltage lockout | Hysteretic 1.04V/1.00V thresholds enable programmable input UVLO using external resistor divider. |
| VIN | Main input supply | Supplies internal circuitry and top switch; requires local high-frequency ceramic bypass near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode Operation | Reduces input current to 2.5µA at no load while maintaining regulation - critical for energy-harvesting and battery-powered systems. |
| Integrated Power Switches | Top/bottom NMOS with 3.2Ω/1.2Ω typical RDS(on) eliminate external MOSFETs and gate drivers, reducing BOM count and layout complexity. |
| Internal Compensation | Eliminates need for external compensation network - simplifies design, accelerates prototyping, and ensures stability across operating conditions. |
| Output Soft-Start & Tracking | TR/SS pin enables controlled ramp-up and sequencing with other rails - prevents inrush current and enables safe power-up in multi-rail systems. |
| AEC-Q100 Qualified | Rated for –40°C to 125°C junction temperature with full characterization - suitable for automotive housekeeping and under-hood applications. |
Applications
| Industrial Sensors | 4–20mA Current Loops |
|---|---|
|
Use Scenario: Powering MEMS pressure/temperature sensors in remote field transmitters with 24V loop supply. IC Role / Device Role / Timing Role: Primary 3.3V/5V point-of-load regulator delivering stable bias to analog signal chain and ADC. Use Value: 2.5µA quiescent current preserves loop compliance margin; 35ns min-on-time enables direct 24V→3.3V conversion without intermediate stages. |
Use Scenario: Generating isolated 5V rail for loop transmitter microcontroller and DAC in 4–20mA smart transmitters. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter supplying regulated VCC to precision current source circuitry. Use Value: Side-wettable DFN enables AOI verification; Burst Mode maintains regulation down to µA-level sleep currents without compromising accuracy. |
| Flow Meters | Automotive Housekeeping Supplies |
|
Use Scenario: Providing clean 5V supply to ultrasonic time-of-flight measurement circuitry in battery-operated portable flow meters. IC Role / Device Role / Timing Role: Low-noise, high-PSSR step-down regulator powering sensitive analog front-end and timing-critical DSP. Use Value: Output ripple <10mVP-P minimizes jitter in echo detection; 42V max input accommodates transient surges in industrial wiring. |
Use Scenario: Generating 5V auxiliary supply for infotainment MCU, CAN transceivers, and lighting controllers in automotive body electronics. IC Role / Device Role / Timing Role: AEC-Q100-compliant buck converter serving as secondary power rail alongside main system PMIC. Use Value: Guaranteed operation to 125°C ambient; thermal shutdown and PG flag support functional safety monitoring per ISO 26262 ASIL-B requirements. |
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#TRPBF | Same silicon, commercial-grade (–40°C to 125°C) with identical electrical specs and pinout. | Lacks automotive qualification documentation and extended reliability testing per AEC-Q100. | Select for non-automotive industrial designs where cost sensitivity outweighs formal automotive certification needs. |
| LT8604JDDBM#TRPBF | Same silicon, extended temperature grade (–40°C to 150°C junction), higher thermal limit than LT8604I. | Supports under-hood applications exceeding 125°C ambient; higher thermal resistance (θJA = 76°C/W) unchanged. | Choose when operating junction temperature may exceed 125°C - e.g., enclosed enclosures with limited airflow or high ambient environments. |
Compared with LT8604EDDBM#TRPBF and LT8604JDDBM#TRPBF, the LT8604IDDBM#TRPBF provides guaranteed performance over the full –40°C to 125°C range with automotive-grade process controls, making it optimal for production automotive subsystems requiring traceable reliability data and long-term supply assurance.
Availability
LT8604IDDBM#TRPBF is available at Aetrix Electronics and suitable for industrial sensors, 4–20mA current loops, and automotive housekeeping supplies requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8604IDDBM#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 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' Power by Linear™ portfolio of high-efficiency, compact DC/DC regulators designed specifically for low-power, high-reliability embedded systems where small size, low IQ, and wide input range are critical.
FAQ
What is the maximum input voltage rating for the LT8604IDDBM#TRPBF?
The LT8604IDDBM#TRPBF has an absolute maximum input voltage rating of 42V on the VIN pin. It operates continuously over a recommended input range of 3.2V to 42V, enabling direct regulation from 24V industrial buses or 36V automotive systems without external pre-regulation. Exceeding 42V risks permanent damage per Absolute Maximum Ratings.
Does the LT8604IDDBM#TRPBF support external frequency synchronization?
No, the LT8604IDDBM#TRPBF does not support external synchronization. Unlike the LT8604C variant, it lacks a SYNC/MODE pin and operates exclusively in Burst Mode. Its switching frequency is set solely by the RT resistor and cannot be locked to an external clock source - a key differentiator confirmed in the datasheet's PACKAGE table and PIN FUNCTIONS section.
What is the feedback reference voltage of the LT8604IDDBM#TRPBF and how precise is it?
The LT8604IDDBM#TRPBF regulates the FB pin to a nominal 0.778V reference, with a guaranteed tolerance of ±1.6% (0.762V to 0.798V) over the full –40°C to 125°C junction temperature range. This tight reference enables accurate output voltage setting across temperature and line variations, supporting stable 5V or adjustable outputs via standard resistor dividers.
How does the LT8604IDDBM#TRPBF achieve ultralow quiescent current?
The LT8604IDDBM#TRPBF achieves 2.5µA quiescent current in Burst Mode by completely disabling non-essential circuitry between switching bursts - including oscillator, error amplifier, and gate drivers - while maintaining regulation via periodic short bursts. This behavior is inherent to its architecture and requires no configuration; it is the only operational mode supported by this variant.
Is the LT8604IDDBM#TRPBF pin-compatible with the LT8604C variants?
No, the LT8604IDDBM#TRPBF is not pin-compatible with LT8604C variants. It uses a 10-lead DFN package (DDBM) with pins BST, SW, BIAS, INTVCC, RT, FB, TR/SS, PG, EN/UV, and VIN. The LT8604C uses a 12-lead LQFN package with additional SYNC/MODE and HYST pins and omits INTVCC - confirmed in the PIN CONFIGURATION and PACKAGE tables of the datasheet.
LT8604IDDBM#TRPBF 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#TRPBF FAQ
1.How can I place an order for LT8604IDDBM#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8604IDDBM#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 LT8604IDDBM#TRPBF reliable?
The price and inventory of LT8604IDDBM#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8604IDDBM#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8604IDDBM#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8604IDDBM#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8604IDDBM#TRPBF?
LT8604IDDBM#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8604IDDBM#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 LT8604IDDBM#TRPBF?
For technical support, including LT8604IDDBM#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8604IDDBM#TRPBF requirements.
6.How does Aetrix verify that LT8604IDDBM#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8604IDDBM#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 LT8604IDDBM#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8604IDDBM#TRPBF?
All LT8604IDDBM#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8604IDDBM#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 LT8604IDDBM#TRPBF part is unused and in its original packaging.
Return procedure for LT8604IDDBM#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8604IDDBM#TRPBF 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…
