My Inquiry
My Account
Analog Devices Inc. LTC7124EUDD#TRPBF
- Part No.:
- LTC7124EUDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LTC7124EUDD#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A DL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,024
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC7124EUDD#TRPBF from Analog Devices is a dual-channel, 3.5A per output synchronous step-down regulator operating from 3.1V to 17V input, delivering adjustable 0.6V–99% VIN outputs with ±1.0% voltage accuracy and ultralow 8μA no-load quiescent current (dual-channel active). It integrates 80mΩ/40mΩ N-channel MOSFETs and supports programmable 500kHz–4MHz switching frequency with ±25% external clock synchronization - used in battery-powered portable instruments requiring high light-load efficiency and low EMI.
For engineers reviewing the LTC7124EUDD#TRPBF datasheet, LTC7124EUDD#TRPBF pinout, LTC7124EUDD#TRPBF application, or LTC7124EUDD#TRPBF equivalent, key selection criteria include dual-output current capability, Burst Mode® vs forced continuous mode trade-offs, spread spectrum modulation for EMI reduction, and internal/external loop compensation flexibility for transient response optimization.
Technical Context
The LTC7124EUDD#TRPBF employs a constant-frequency peak current mode architecture with independent control loops per channel, enabling precise load and line regulation (±0.5%) and fast transient response. Each channel features dedicated ITH pins for internal or external compensation and operates 180° out of phase to reduce input ripple.
It integrates dual N-channel MOSFET drivers with 50ns minimum on-time, supports high-duty-cycle operation up to 99% via automatic BOOST-SW capacitor refresh, and includes input overvoltage lockout (18.4V) and INTVCC LDO undervoltage lockout (2.9V) for robust system protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.1V to 17V - supports wide-input industrial and battery-supplied systems including 12V nominal rails and Li-ion stacks. |
| Output Current per Channel | 3.5A - enables dual high-current point-of-load conversion without external power stages. |
| Quiescent Current | <8μA (both channels enabled) - sustains >10-year battery life in always-on portable instrumentation. |
| Switching Frequency | 500kHz to 4MHz (RT-programmable) - allows optimization between inductor size (higher f) and conduction loss (lower f). |
| Feedback Voltage Accuracy | ±1.0% (0.6V reference) - ensures tight output regulation across temperature and load for precision analog subsystems. |
| Package | 24-lead 3mm × 5mm QFN with exposed thermal pad - delivers θJA = 22°C/W for high-power-density thermal management. |
| Operating Junction Temp | –40°C to 125°C - qualified for automotive under-hood and industrial embedded environments. |
Pinout & Package
Package: 24-lead (3mm × 5mm) plastic QFN (UDD), thermally enhanced with exposed GND pad (pins 25/26) requiring PCB soldering for rated thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,2,7,8,25,26) | Power and signal ground reference | Exposes thermal pad; must be solidly connected to PCB ground plane for thermal dissipation and noise immunity. |
| VIN1 / VIN2 (Pins 3,6) | Independent input supplies per channel | Enables dual-input architectures (e.g., separate battery and auxiliary rail); each powers its own gate driver and INTVCC LDO. |
| SW1 / SW2 (Pins 13,14,19,20) | Switch node connections | High dv/dt nodes requiring short, low-inductance routing to inductors; shared pins per channel reduce parasitic inductance. |
| BOOST1 / BOOST2 (Pins 15,18) | Floating gate drive supply for top MOSFETs | Requires 0.1µF ceramic capacitor between BOOST and SW; enables high-side N-MOSFET operation up to 99% duty cycle. |
| FB1 / FB2 (Pins 24,9) | Resistive divider feedback inputs | Reference 0.6V; sets VOUT = 0.6V × (1 + R1/R2); high-impedance (10nA bias) minimizes divider current error. |
| ITH1 / ITH2 (Pins 23,10) | Error amplifier output / compensation nodes | Supports internal compensation (tie to INTVCC) or external RC network for optimized transient response at ≥1MHz. |
| MODE/SYNC (Pin 17) | Operation mode select and sync input | Configures Burst Mode® (INTVCC), pulse skip (GND), or forced continuous (1.0V–INTVCC–1.2V); accepts external clock for synchronization. |
| ILIM (Pin 4) | Peak current limit configuration | Tie to GND for full 5.0A limit per channel; tie to INTVCC for half-limit (2.6A); floating configures asymmetric limits (5.0A/2.6A). |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces no-load IQ to 5.5μA (single channel) or 8μA (dual), extending battery runtime in standby without sacrificing startup time. |
| Spread spectrum modulation | When RT tied to INTVCC, centers switching at 2.25MHz ±12%, lowering peak radiated emissions by >10dB for CISPR 22/32 compliance. |
| Dual-channel 180° phase shift | Halves input capacitor RMS current and reduces input ripple amplitude, enabling smaller bulk capacitance and lower EMI filter cost. |
| Integrated 80mΩ/40mΩ MOSFETs | Delivers up to 95% efficiency at 3.5A/3.3V out from 12V in - eliminates external FET layout complexity and gate drive design effort. |
| Programmable soft-start (1100µs) | Prevents inrush current during power-up; operates in pulse-skip mode regardless of MODE/SYNC setting for predictable ramp behavior. |
Applications
| Battery-Powered Portable Instruments | Industrial Point-of-Load Supplies |
|---|---|
|
Use Scenario: Handheld multimeters and portable oscilloscopes powered by dual-cell Li-ion (6.4–8.4V) requiring clean, isolated 3.3V and 1.8V rails. IC Role / Device Role / Timing Role: Dual-output DC/DC converter providing regulated, low-noise power to ADCs, microcontrollers, and display drivers. Use Value: Ultralow 8μA quiescent current preserves battery capacity during sleep; spread spectrum reduces conducted EMI into sensitive analog front-ends. |
Use Scenario: Programmable logic controllers (PLCs) with distributed I/O modules needing local 5V and 3.3V supplies from 24V bus. IC Role / Device Role / Timing Role: High-efficiency, thermally robust step-down regulator delivering 3.5A per rail with integrated MOSFETs and thermal pad. Use Value: 3mm × 5mm QFN package fits dense PCB layouts; 125°C junction rating supports operation in unventilated enclosures. |
| Handheld Scanners | Medical Diagnostic Sensors |
|
Use Scenario: Barcode scanners using CMOS image sensors and laser diodes requiring tightly regulated 2.5V and 5.0V from single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Dual buck regulator supporting dynamic load profiles: burst-mode for idle, forced continuous for active scanning. Use Value: MODE/SYNC pin enables seamless transition between low-IQ and low-ripple modes; 50ns min on-time supports 2.5V out from 4.2V input. |
Use Scenario: Portable ultrasound probes with analog beamforming ASICs demanding ultra-stable 1.2V and 1.8V supplies with <±0.5% regulation. IC Role / Device Role / Timing Role: Precision voltage regulator with ±1.0% FB accuracy and excellent load/line regulation (±0.5%). Use Value: Internal compensation option ensures stability across temperature; PGOOD outputs enable system-level power sequencing and fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8859GQ-Z (Monolithic Power) | Single 6A output (not dual); 2.5V–18V input; 500kHz–2.2MHz freq; no spread spectrum; 12μA IQ (dual-rail not applicable) | Requires two ICs for dual 3.5A outputs; lacks phase interleaving and integrated boost circuitry for high-duty-cycle operation | Select when single high-current rail suffices and spread spectrum is unnecessary; verify external bootstrap cap sizing for >90% duty cycle. |
| TPS544B25RTER (Texas Instruments) | Dual 4A/channel; 4.5V–18V input; 300kHz–2MHz freq; no Burst Mode®; 25μA IQ (dual); requires external MOSFETs | Higher IQ increases battery drain; discrete FETs increase BOM count and layout complexity; no integrated spread spectrum | Choose for higher current headroom (4A vs 3.5A) and TI ecosystem support; accept larger solution size and reduced light-load efficiency. |
Compared with MP8859GQ-Z and TPS544B25RTER, the LTC7124EUDD#TRPBF uniquely combines dual 3.5A integration, sub-10μA quiescent current, spread spectrum EMI reduction, and 180° phase interleaving - making it optimal for space-constrained, battery-sensitive, and EMI-critical dual-rail systems.
Availability
LTC7124EUDD#TRPBF is available at Aetrix Electronics and suitable for battery-powered portable instruments, industrial point-of-load supplies, and handheld scanners requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC7124EUDD#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 semiconductors, serving precision instrumentation, industrial automation, and communications markets.
The LTC7124 belongs to the Power by Linear™ family of high-efficiency, ultralow-IQ DC/DC regulators designed specifically for battery-operated and energy-sensitive applications where thermal density and standby power are critical constraints.
FAQ
What is the maximum output voltage achievable with LTC7124EUDD#TRPBF?
The LTC7124EUDD#TRPBF supports an adjustable output voltage range from 0.6V up to 99% of the respective input voltage (VIN1 or VIN2), limited by internal boost refresh logic in high-duty-cycle operation. For example, with VIN1 = 12V, VOUT1 can be set up to 11.88V; with VIN2 = 5V, VOUT2 max is 4.95V. This is guaranteed by design per the Electrical Characteristics table.
How does the ILIM pin affect current limiting on LTC7124EUDD#TRPBF?
The ILIM pin on LTC7124EUDD#TRPBF configures peak current limits per channel: tying to GND sets 5.0A (typ) for both channels; tying to INTVCC halves the limit to 2.6A (typ); leaving floating applies 5.0A to Channel 1 and 2.6A to Channel 2. These values are verified across –40°C to 125°C and directly impact inductor saturation margin and short-circuit protection behavior.
Can LTC7124EUDD#TRPBF operate in forced continuous mode while synchronized to an external clock?
Yes - applying an external clock signal to the MODE/SYNC pin synchronizes the LTC7124EUDD#TRPBF to that clock within ±25% of the RT-programmed frequency and forces continuous conduction mode. However, this capability is disabled if RT is tied to INTVCC (enabling spread spectrum), as stated in the Pin Functions and Operation sections.
What thermal performance can be expected from LTC7124EUDD#TRPBF in a standard 4-layer PCB layout?
With the exposed thermal pad (pins 25/26) properly soldered to a 2-in² internal copper ground plane, the LTC7124EUDD#TRPBF achieves θJA = 22°C/W. At 3.5A per channel and 12V input → 3.3V output, typical power dissipation is ~1.2W, resulting in ~26°C junction-to-ambient rise above 25°C ambient - well within the 125°C max junction rating.
Does LTC7124EUDD#TRPBF support output voltage tracking during startup?
No - the LTC7124EUDD#TRPBF does not include dedicated tracking functionality. Each channel has independent soft-start (1100µs internal ramp) and RUN pins (RUN1/RUN2), allowing sequenced enablement but not analog or resistor-based voltage tracking. External circuitry would be required for true tracking between VOUT1 and VOUT2.
LTC7124EUDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 3.1V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 16.8V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (3x5)
LTC7124EUDD#TRPBF FAQ
1.How can I place an order for LTC7124EUDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7124EUDD#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 LTC7124EUDD#TRPBF reliable?
The price and inventory of LTC7124EUDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7124EUDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7124EUDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7124EUDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7124EUDD#TRPBF?
LTC7124EUDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7124EUDD#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 LTC7124EUDD#TRPBF?
For technical support, including LTC7124EUDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7124EUDD#TRPBF requirements.
6.How does Aetrix verify that LTC7124EUDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7124EUDD#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 LTC7124EUDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7124EUDD#TRPBF?
All LTC7124EUDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7124EUDD#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 LTC7124EUDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC7124EUDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC7124EUDD#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…
