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Analog Devices Inc. LTC3622EDE-2#TRPBF
- Part No.:
- LTC3622EDE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622EDE-2#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,834
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Product details
Overview
LTC3622EDE-2#TRPBF from Analog Devices is a dual-channel, 1A synchronous step-down regulator with 2.25MHz fixed switching frequency, ultralow 5µA no-load quiescent current (both channels enabled), ±1% output voltage accuracy, and operation across 2.7V–17V input range - used in battery-powered portable scanners requiring compact, high-efficiency dual-rail power delivery.
For engineers reviewing the LTC3622EDE-2#TRPBF datasheet, LTC3622EDE-2#TRPBF pinout, LTC3622EDE-2#TRPBF application, or LTC3622EDE-2#TRPBF equivalent, key selection considerations include its 2.25MHz switching capability, phase-shift programmability, selectable Burst Mode® vs pulse-skipping operation, and dual independent RUN/PGOOD control for point-of-load sequencing.
Technical Context
The LTC3622EDE-2#TRPBF implements a constant-frequency peak-current-mode control architecture with internal compensation, supporting 2.25MHz fixed-frequency operation and ±50% external clock synchronization. Each channel features independent feedback (FB1/FB2), RUN enable, and PGOOD monitoring.
It integrates dual N-channel and P-channel MOSFETs with RDS(ON) of 0.15Ω (NMOS) and 0.37Ω (PMOS) at 5V input, supports 100% duty-cycle dropout operation, and enables phase shift selection (0° or 180°) via the PHASE pin or external clock edge modulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.25MHz fixed, ±50% sync range - enables compact LC filter design with <4.7µH inductors and reduces EMI fundamental energy. |
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and battery-supplied systems including 2-cell Li-ion up to 12V rails. |
| Output Voltage Range | 0.6V to VIN per channel - allows adjustable dual outputs (e.g., 1.8V + 3.3V) or fixed options via FB shorting. |
| No-Load Quiescent Current | 5µA (both channels active), <4µA (single channel) - extends battery life in always-on portable devices. |
| Output Accuracy | ±1% over line/load/temperature - ensures stable logic supply margins for microcontrollers and sensors. |
| Peak Output Current | 1A per channel - delivers sufficient power for FPGA I/O banks, ADC/DAC analog supplies, or RF front-end bias rails. |
| Package | 14-pin DFN (3mm × 4mm, exposed pad) - provides low thermal resistance (θJA = 40°C/W) for high-power-density layouts. |
Pinout & Package
14-pin DFN (3mm × 4mm) with exposed thermal pad (Pin 15 = GND). Pin 1 = VIN1, Pin 2 = PGOOD1, Pin 3 = MODE/SYNC, Pin 4 = PHASE, Pin 5 = PGOOD2, Pin 6 = ILIM, Pin 7 = VIN2, Pin 8 = SW2, Pin 9 = RUN2, Pin 10 = FB2, Pin 11 = INTVCC, Pin 12 = FB1, Pin 13 = RUN1, Pin 14 = SW1, Pin 15 = GND (exposed pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 / VIN2 | Independent input supplies per channel | Enables dual-input architectures (e.g., primary + backup rail) or shared input with independent regulation. |
| SW1 / SW2 | Switch node outputs | Drive external inductors; require tight layout to minimize EMI and voltage spikes during 2.25MHz switching. |
| FB1 / FB2 | Feedback inputs (0.6V reference) | Set output voltage via resistor divider; shorted to VOUT for fixed-output variants like LTC3622-23/5. |
| RUN1 / RUN2 | Channel enable inputs | Logic-high active; allow independent power sequencing or dynamic channel disable for load-matching efficiency. |
| MODE/SYNC | Burst Mode select & external clock input | Tied to INTVCC for ultralow-IQ; grounded for low-ripple pulse-skipping; accepts 0.4V–(VINTVCC−0.3V) external clock. |
| PHASE | Inter-channel phase control | GND = 0° in-phase; INTVCC = 180° anti-phase - reduces input ripple and improves thermal distribution. |
| ILIM | Current limit configuration | GND = full 1.8A limit; INTVCC = 0.9A limit; 1V bias sets asymmetric limits (1.8A Ch1 / 0.9A Ch2). |
| PGOOD1 / PGOOD2 | Open-drain power-good indicators | Assert after soft-start; deassert within 32 cycles if output deviates >7.5% - enables system-level fault detection. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 5µA total (both channels enabled) - critical for multi-year battery life in IoT sensors and handheld medical devices. |
| 2.25MHz fixed-frequency operation | Enables use of sub-5µH inductors and 10–22µF ceramic output capacitors - saves board space vs lower-frequency alternatives. |
| Independent channel control | Separate RUN, FB, and PGOOD pins per channel - supports staggered startup, dynamic load shedding, and fault-isolated operation. |
| Programmable phase relationship | 0° or 180° inter-channel phase shift - cuts input capacitor RMS current by up to 30% and eases EMI filtering. |
| Internal soft-start | 500µs ramp per channel - prevents inrush current and output overshoot during power-up or wake-from-sleep events. |
| 100% duty-cycle dropout mode | Maintains regulation down to VIN ≈ VOUT - extends usable battery voltage range in single-cell Li-ion or coin-cell applications. |
Applications
| Portable Handheld Scanners | Industrial Point-of-Load Supplies |
|---|---|
Use Scenario: Battery-powered barcode scanner with CMOS image sensor and ARM Cortex-M MCU requiring clean, sequenced 1.8V and 3.3V rails. IC Role / Device Role / Timing Role: Dual-output DC/DC regulator providing independent, low-noise power domains with programmable startup timing via RUN1/RUN2. Use Value: 5µA quiescent current extends 2000mAh Li-ion battery life to >1 year in standby; 2.25MHz switching minimizes solution size under tight mechanical constraints. |
Use Scenario: Programmable logic controller (PLC) module needing isolated 5V and 12V auxiliary supplies from a 24V bus. IC Role / Device Role / Timing Role: Dual buck converter delivering regulated outputs with independent PGOOD signaling for system health monitoring. Use Value: 17V max input withstands 24V bus transients; ±1% accuracy ensures reliable I/O driver and analog sensor operation across temperature. |
| Medical Wearable Sensors | Automotive Infotainment Subsystems |
Use Scenario: ECG patch with ultra-low-power analog front-end and Bluetooth LE radio requiring stable 1.2V and 3.0V supplies. IC Role / Device Role / Timing Role: High-efficiency dual regulator operating in Burst Mode® to minimize sleep-state current draw. Use Value: 4µA single-channel IQ enables >3-year battery life on CR2032; internal compensation eliminates external loop components. |
Use Scenario: In-vehicle display unit with LCD backlight driver and touch controller needing noise-immune 5V and 1.1V rails. IC Role / Device Role / Timing Role: Synchronous buck pair with 180° phase shift to suppress input ripple coupling into sensitive analog circuits. Use Value: Anti-phase operation reduces input capacitor RMS current by 28%, lowering thermal stress and enabling smaller 1210-case ceramics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270RGET | 2.2MHz fixed frequency, 2A per channel, 2.95–18V input, but higher 25µA IQ and no Burst Mode® | Higher output current suits motor drivers; less suitable for multi-year battery life requirements | Select when >1A load or higher input transient immunity (20V abs max) is needed; avoid for ultra-low-IQ designs. |
| MAX20073ATCB/V+T | 2.1MHz, 1A per channel, 3.5–36V input, AEC-Q100 qualified, but 15µA IQ and no phase-shift control | Designed for automotive junction temperatures (−40°C to +125°C); lacks programmable phase for EMI reduction | Choose for automotive-grade reliability and extended input range; not optimal for consumer portables prioritizing IQ and EMI performance. |
Compared with TPS65270RGET and MAX20073ATCB/V+T, the LTC3622EDE-2#TRPBF delivers the lowest quiescent current (5µA), precise phase control for input ripple cancellation, and Burst Mode® optimization - making it uniquely suited for space-constrained, battery-critical portable electronics where efficiency at microamp loads is non-negotiable.
Availability
LTC3622EDE-2#TRPBF is available at Aetrix Electronics and suitable for portable handheld scanners, industrial PLC modules, and medical wearable sensors requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC3622EDE-2#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 precision instrumentation, communications, and power management markets since 1965.
The LTC3622 product line delivers dual-channel, ultralow-IQ synchronous buck regulators targeting battery-powered and space-constrained applications where efficiency at light loads and compact footprint are essential design criteria.
FAQ
What is the switching frequency of the LTC3622EDE-2#TRPBF?
The LTC3622EDE-2#TRPBF operates at a fixed 2.25MHz switching frequency, with ±50% synchronization range to an external clock. This high-frequency capability allows use of small inductors (<4.7µH) and ceramic capacitors while maintaining high efficiency across its 2.7V–17V input range. The LTC3622EDE-2#TRPBF does not support 1MHz operation - that variant is the base LTC3622.
Does the LTC3622EDE-2#TRPBF support independent enable control for each channel?
Yes, the LTC3622EDE-2#TRPBF provides fully independent RUN1 and RUN2 inputs, allowing separate activation, sequencing, or dynamic disabling of each 1A output channel. This enables flexible power management strategies such as staggered startup, load-dependent channel shutdown, or fault isolation - all without external logic. The LTC3622EDE-2#TRPBF maintains this capability in both Burst Mode® and pulse-skipping operation.
How does the PHASE pin affect operation of the LTC3622EDE-2#TRPBF?
The PHASE pin on the LTC3622EDE-2#TRPBF selects inter-channel timing: tied to GND for 0° (in-phase) operation, or to INTVCC for 180° (anti-phase) operation. When used with an external clock on MODE/SYNC, PHASE = INTVCC enables edge-modulated phase shift (e.g., 90°). This reduces input capacitor RMS current and system-level EMI - a key advantage of the LTC3622EDE-2#TRPBF over single-channel or non-phase-controlled dual regulators.
What is the quiescent current specification for the LTC3622EDE-2#TRPBF?
The LTC3622EDE-2#TRPBF draws 5µA quiescent current with both channels enabled and in Burst Mode®, and <4µA with only one channel active. This ultralow IQ is measured at no load, 12V input, and 25°C ambient. The LTC3622EDE-2#TRPBF achieves this via optimized gate drive and sleep-state circuitry, making it ideal for battery-powered applications where multi-year shelf life is required.
Can the LTC3622EDE-2#TRPBF operate in 100% duty cycle dropout mode?
Yes, the LTC3622EDE-2#TRPBF supports 100% duty-cycle operation, maintaining regulation as input voltage approaches the output voltage. During dropout, it transitions between active and sleep modes to minimize quiescent current - extending usable battery voltage range in single-cell Li-ion or coin-cell systems. This behavior is inherent to the LTC3622EDE-2#TRPBF's architecture and requires no external configuration.
LTC3622EDE-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN 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):
- 2.7V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 17V
- Current - Output:
- 1A
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LTC3622EDE-2#TRPBF FAQ
1.How can I place an order for LTC3622EDE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622EDE-2#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 LTC3622EDE-2#TRPBF reliable?
The price and inventory of LTC3622EDE-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3622EDE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3622EDE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622EDE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622EDE-2#TRPBF?
LTC3622EDE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622EDE-2#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 LTC3622EDE-2#TRPBF?
For technical support, including LTC3622EDE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622EDE-2#TRPBF requirements.
6.How does Aetrix verify that LTC3622EDE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3622EDE-2#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 LTC3622EDE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3622EDE-2#TRPBF?
All LTC3622EDE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622EDE-2#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 LTC3622EDE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3622EDE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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