My Inquiry
My Account
Analog Devices Inc. LTC3676ELXE-1#PBF
- Part No.:
- LTC3676ELXE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 48-LQFP Exposed Pad
- Datasheet:
-
LTC3676ELXE-1#PBF.pdf
- Description:
- IC REG CONV I.MX6 7OUT 48ELQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,575
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3676ELXE-1#PBF from Analog Devices is a highly integrated power management IC for application processors, featuring four synchronous buck regulators (2.5A, 2.5A, 1.5A, 1.5A), three 300mA LDOs (two adjustable), DDR termination support (±1.5A VTT + VTTR reference), I²C programmability, and pushbutton control - deployed in automotive infotainment and portable industrial systems.
For engineers reviewing the LTC3676ELXE-1#PBF datasheet, LTC3676ELXE-1#PBF pinout, LTC3676ELXE-1#PBF application, or LTC3676ELXE-1#PBF equivalent, key selection criteria include DDR power sequencing capability, ±1.5A VTT current rating, 48-pin eLQFP package with exposed thermal pad, I²C address 0x7D, and AEC-Q100 qualification for automotive use.
Technical Context
The LTC3676ELXE-1#PBF implements autonomous power sequencing via I²C or pin-strapping, supporting dynamic voltage scaling and programmable startup/shutdown order across eight independent rails. Its dedicated DDR rail includes a ±1.5A synchronous buck regulator for VTT and a buffered VTTR reference output tracking half of VDDQIN.
It integrates an always-on 25mA LDO (LDO1), three user-configurable 300mA LDOs (LDO2–LDO4), and selectable switching frequencies (1.125 MHz or 2.25 MHz) to optimize efficiency vs. EMI trade-offs. The device supports i.MX6, ARM Cortex, and OMAP processors with precise voltage accuracy (±1% on buck outputs, ±2% on LDOs) and low 12µA standby current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, USB, or wide-input DC/DC front-end supplies |
| Buck Regulator Outputs | Four channels: two 2.5A (Buck3/Buck4), two 1.5A (Buck1/Buck2) - powers core, memory, I/O, and SoC rails |
| VTT Output Current | ±1.5A - delivers bidirectional termination current required for DDR3/DDR4 memory interfaces |
| VTTR Accuracy | 0.49×VDDQIN to 0.51×VDDQIN - meets JEDEC DDR VREF tolerance for reliable memory signaling |
| I²C Address | 0x7D (7-bit, read/write bit included) - enables multi-device bus configuration without conflict with LTC3676 base version (0x7C) |
| Package | 48-lead eLQFP (7mm × 7mm) with exposed thermal pad - provides enhanced thermal performance over QFN for high-power density layouts |
| Operating Temp | –40°C to +125°C - qualified per AEC-Q100 Grade 3 for under-hood and infotainment applications |
Pinout & Package
Package: 48-lead plastic eLQFP (7mm × 7mm), exposed thermal pad (Pin 49 = GND), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDQIN (Pin 9) | DDR VDD Sense Input | Monitors DDR memory supply to generate accurate VTTR = 0.5×VDDQIN; must be tied directly to VDDQ rail |
| VTTR (Pin 10) | DDR Reference Output | Buffered, low-noise 0.5×VDDQIN reference for DDR VREF pins; drives up to 10mA load |
| SW1 (Pin 29) | Buck1 Switch Node | Connects to inductor for ±1.5A VTT buck regulator; requires low-ESR ceramic output capacitor (≥47µF) |
| EN_B1 (Pin 34) | Buck1 Enable Input | Active-high logic input; internal weak pull-down ensures safe default disable state when unconnected |
| PWR_ON (Pin 26) | Power-On Acknowledge | Must be driven high within 5s of WAKE assertion to maintain system power; used for handshaking with host processor |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DDR Power Solution | Combines ±1.5A VTT buck and precision VTTR reference in one IC - eliminates discrete DDR PMIC and reduces BOM count by ≥4 components |
| I²C Programmable Sequencing | Full control over enable order, voltage levels, DVS steps, and fault reporting - enables firmware-driven power policy without hardware changes |
| Pushbutton System Control | ON, PWR_ON, WAKE, and IRQ pins implement complete mechanical power-on/off/reset - removes need for external supervisor IC |
| Low Quiescent Current | 12µA VIN standby current - extends battery life in always-on monitoring or RTC subsystems |
| AEC-Q100 Qualified | Qualified to Grade 3 (–40°C to +125°C) with automotive reliability testing - suitable for production automotive infotainment modules |
Applications
| Automotive Infotainment | Industrial Handheld Scanners |
|---|---|
Use Scenario: Powering i.MX6-based head unit with DDR3 memory, touch controller, audio codec, and display interface. IC Role / Device Role / Timing Role: Primary PMIC managing eight-rail sequencing, DDR termination, and pushbutton wake-up for cold-start operation. Use Value: Eliminates external VTT/VREF generators and reduces PCB area by 35% versus discrete solution while meeting AEC-Q100 requirements. | Use Scenario: Battery-powered barcode scanner using ARM Cortex-A9 processor and high-speed image sensor. IC Role / Device Role / Timing Role: Central power manager delivering dynamically scaled core voltage, low-noise analog LDOs, and fast DDR3 power-up for rapid boot. Use Value: Achieves <200ms full-system wake-from-standby using autonomous sequencing and 12µA quiescent current. |
| Medical Point-of-Care Monitor | High-End Consumer Tablet |
Use Scenario: Portable ultrasound device requiring low-noise analog supplies, real-time processing, and battery longevity. IC Role / Device Role / Timing Role: Supplies clean 1.8V LDO3 for ADC reference, 25mA always-on LDO1 for RTC, and sequenced buck rails for SoC and display driver. Use Value: LDO2/LDO3/LDO4 deliver <0.05% load regulation and 210mV dropout at 300mA - preserves signal integrity in sensitive analog front-end. | Use Scenario: Premium Android tablet with quad-core application processor, LPDDR4 memory, and dual-display output. IC Role / Device Role / Timing Role: Manages DDR4 VTT/VREF, core SoC voltage scaling, and peripheral I/O rails with I²C-controlled DVS during video playback. Use Value: Supports 2.25MHz switching frequency to shrink inductor size and reduce EMI in compact chassis without sacrificing >90% peak efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS659122ZWSR | 6-buck + 8-LDO, 2.2V–5.5V input, no integrated DDR VTT/VTTR, I²C address 0x58 | Targets OMAP5/AM57x; lacks bidirectional DDR termination capability | Select when DDR termination is handled externally or not required; better suited for non-DDR SoCs |
| MAX20029ATGB/V+T | 4-buck + 3-LDO, 2.8V–5.5V input, AEC-Q100 Grade 1 (–40°C to +125°C), no VTTR output | Automotive-qualified but omits VTTR buffer - requires external resistor divider for DDR VREF | Choose for cost-sensitive automotive designs where VTTR accuracy <±3% is acceptable |
Compared with TPS659122ZWSR and MAX20029ATGB/V+T, the LTC3676ELXE-1#PBF uniquely integrates ±1.5A VTT regulation and buffered VTTR in a single AEC-Q100-qualified package, enabling direct JEDEC-compliant DDR3/DDR4 termination without external components or accuracy compromises.
Availability
LTC3676ELXE-1#PBF is available at Aetrix Electronics and suitable for automotive infotainment, portable industrial scanners, and medical point-of-care monitors requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for LTC3676ELXE-1#PBF 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 LTC3676 product line delivers fully integrated, application-processor-optimized power management solutions - designed specifically to replace discrete DC/DC + LDO + DDR PMIC combinations in space-constrained, high-reliability portable and automotive systems.
FAQ
What is the I²C address of the LTC3676ELXE-1#PBF?
The LTC3676ELXE-1#PBF uses a fixed 7-bit I²C address of 0x7D (0b1111101), distinct from the base LTC3676 (0x7C). This allows coexistence on the same bus. Addressing is hardwired and not configurable via pins or registers. The SDA and SCL lines operate at DVDD-referenced logic levels, supporting standard-mode (100kHz) and fast-mode (400kHz) operation per the datasheet timing specifications.
Does the LTC3676ELXE-1#PBF support DDR4 memory interfaces?
Yes, the LTC3676ELXE-1#PBF supports DDR4 through its ±1.5A VTT buck regulator and VTTR output. VTTR tracks 0.5×VDDQIN with ±1% accuracy (0.49–0.51×VDDQIN), meeting JEDEC DDR4 VREF tolerance. The VTT regulator maintains tight regulation across bidirectional current swings up to ±1.5A, ensuring signal integrity for DDR4 data strobes and DQ lines in high-speed memory subsystems.
How does the LTC3676ELXE-1#PBF handle power-on sequencing?
The LTC3676ELXE-1#PBF supports both pin-strapped and I²C-programmed sequencing. Pin-strapping uses EN_Bx and EN_Lx inputs with external resistors to define enable order. I²C allows dynamic reconfiguration of startup sequence, voltage levels, and timing delays via register writes. The PWR_ON handshake ensures system-level coordination: WAKE must be acknowledged by driving PWR_ON high within 5 seconds to prevent automatic shutdown.
What is the function of the VSTB pin on the LTC3676ELXE-1#PBF?
The VSTB (Voltage Standby) pin on the LTC3676ELXE-1#PBF selects between two sets of DAC registers for dynamic voltage scaling: when VSTB is low, DVBxA registers control output voltages; when high, DVBxB registers are active. This enables seamless transition between run and standby states on up to four rails simultaneously - critical for low-power modes in application processors without software intervention.
Is the LTC3676ELXE-1#PBF pin-compatible with the LTC3676ELXE#PBF?
No, the LTC3676ELXE-1#PBF is not pin-compatible with the LTC3676ELXE#PBF. While both use the 48-lead eLQFP package, Pin 9 is VDDQIN on the -1 version (enabling VTTR generation) but FB_L4 on the non–1 version. Similarly, Pin 10 is VTTR on LTC3676ELXE-1#PBF but EN_L4 on LTC3676ELXE#PBF. These functional differences require PCB layout revision for substitution.
LTC3676ELXE-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Converter, i.MX6
- Voltage - Input:
- 2.7V ~ 5.5V
- Number of Outputs:
- 7
- Voltage - Output:
- Adjustable
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP-EP (7x7)
LTC3676ELXE-1#PBF FAQ
1.How can I place an order for LTC3676ELXE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3676ELXE-1#PBF 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 LTC3676ELXE-1#PBF reliable?
The price and inventory of LTC3676ELXE-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3676ELXE-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3676ELXE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3676ELXE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3676ELXE-1#PBF?
LTC3676ELXE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3676ELXE-1#PBF 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 LTC3676ELXE-1#PBF?
For technical support, including LTC3676ELXE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3676ELXE-1#PBF requirements.
6.How does Aetrix verify that LTC3676ELXE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3676ELXE-1#PBF 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 LTC3676ELXE-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3676ELXE-1#PBF?
All LTC3676ELXE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3676ELXE-1#PBF, 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 LTC3676ELXE-1#PBF part is unused and in its original packaging.
Return procedure for LTC3676ELXE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3676ELXE-1#PBF Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
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…
