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Analog Devices Inc. LTC3622IDE-2#TRPBF
- Part No.:
- LTC3622IDE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622IDE-2#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,185
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Product details
Overview
LTC3622IDE-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 conversion.
For engineers reviewing the LTC3622IDE-2#TRPBF datasheet, LTC3622IDE-2#TRPBF pinout, LTC3622IDE-2#TRPBF application, or LTC3622IDE-2#TRPBF equivalent, key selection considerations include dual-channel phase control, selectable Burst Mode® vs pulse-skipping operation, external clock synchronization (±50%), adjustable 0.6V–VIN output, and 14-pin DFN (3mm × 4mm) thermal performance with exposed GND pad.
Technical Context
The LTC3622IDE-2#TRPBF implements a constant-frequency peak-current-mode control architecture with internal compensation and soft-start. Each channel features independent RUN, FB, PGOOD, and ILIM pins, enabling asymmetric configuration - e.g., one channel in Burst Mode® for ultra-low IQ, the other in pulse-skipping for low ripple.
It supports programmable phase shift (0° or 180° via PHASE pin) and dynamic phase control via external clock edge modulation on MODE/SYNC. The INTVCC LDO powers internal circuitry from VIN1 and provides stable 3.6V bias for gate drivers and logic, with 1µF minimum bypass capacitance required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 2.25MHz - enables use of small 2.2µH–4.7µH inductors and reduces EMI filter size. |
| Input Voltage Range | 2.7V to 17V - supports single-cell Li-ion up to 4S battery stacks and industrial 12V rails. |
| Output Voltage Range | 0.6V to VIN per channel - allows generation of sub-1V core supplies and standard 3.3V/2.5V rails. |
| No-Load Quiescent Current | 5µA with both channels enabled - extends battery life in always-on portable systems. |
| Output Voltage Accuracy | ±1% over line, load, and temperature - ensures reliable regulation for precision analog or MCU VDD rails. |
| Peak Output Current | 1A per channel - delivers sufficient power for dual-core microcontrollers or sensor subsystems. |
| Thermal Package | 14-pin DFN (3mm × 4mm) with exposed GND pad - achieves θJC = 4.4°C/W for high-power density layouts. |
Pinout & Package
Package: 14-lead plastic DFN (3mm × 4mm), exposed thermal pad (Pin 15) connected to GND. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Channel 1 input supply | Powers Channel 1 switch and INTVCC LDO; must be ≥2.7V and ≤17V. |
| PGOOD1 | Open-drain status indicator | Asserts high after 32 cycles of valid regulation; pulls low if VOUT1 deviates >±7.5%. |
| MODE/SYNC | Mode select & sync input | Tie to INTVCC for Burst Mode® (400mA clamp); tie to GND for pulse-skipping; accept external clock for sync. |
| PHASE | Inter-channel timing control | Low = 0° phase shift; high = 180° shift; with external clock, enables edge-based phase modulation. |
| PGOOD2 | Channel 2 status indicator | Independent open-drain output mirroring PGOOD1 behavior for Channel 2. |
| ILIM | Current limit configuration | GND = full 1.8A limit; INTVCC = 0.9A limit; 1V = asymmetric limit (1.8A Ch1 / 0.9A Ch2). |
| VIN2 | Channel 2 input supply | Independent input rail; may differ from VIN1 (e.g., separate battery or supply domain). |
| SW2 | Channel 2 switch node | Connects to inductor; requires low-inductance layout and Kelvin return path to minimize ringing. |
| RUN2 | Channel 2 enable control | Logic-high (>1.0V) activates regulator; must not float - tie to GND or pull-up via resistor. |
| FB2 | Channel 2 feedback input | Senses divided output voltage; sets VOUT2 = 0.6V × (1 + R2/R1); short to VOUT for fixed-output variants. |
| INTVCC | Internal LDO output | 3.6V ±0.3V regulated supply; bypass with ≥1µF low-ESR ceramic capacitor to GND. |
| FB1 | Channel 1 feedback input | Identical function to FB2; enables independent output programming for each channel. |
| RUN1 | Channel 1 enable control | Independent logic enable; supports staggered startup or fault-isolated shutdown. |
| SW1 | Channel 1 switch node | High dv/dt node; requires tight loop area with input cap and inductor to reduce EMI. |
| GND | Power and signal reference | Exposed pad (Pin 15) must be soldered to PCB ground plane for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces no-load IQ to 5µA (both channels) while maintaining regulation - critical for multi-day battery life in handheld devices. |
| External clock synchronization | Accepts ±50% frequency deviation from external source, enabling EMI reduction via spread-spectrum or system-level clock alignment. |
| Programmable inter-channel phase | 0° or 180° default shift, plus dynamic edge-controlled phase via MODE/SYNC - minimizes input ripple and improves thermal distribution. |
| Asymmetric current limiting | ILIM pin configures independent peak current limits per channel (e.g., 1.8A/0.9A), supporting mixed-load applications without external sensing. |
| Integrated soft-start | 500µs internal ramp per channel prevents inrush current and output overshoot during power-up or recovery from UVLO. |
| Dropout operation with 100% duty cycle | Maintains regulation down to VIN ≈ VOUT by enabling 100% on-time; preserves efficiency near battery end-of-life. |
Applications
| Portable Handheld Scanners | Industrial Point-of-Load Supplies |
|---|---|
Use Scenario: Battery-powered barcode scanner with dual-core processor and CMOS image sensor requiring isolated 1.2V core and 3.3V I/O rails. IC Role / Device Role / Timing Role: Dual synchronous buck regulator delivering tightly regulated, low-noise, phase-shifted outputs with independent enable and PGOOD monitoring. Use Value: 5µA quiescent current extends runtime between charges; 2.25MHz switching enables <3mm² total solution size per channel. |
Use Scenario: Programmable logic controller (PLC) module needing clean 2.5V and 5V rails from a noisy 12V industrial bus. IC Role / Device Role / Timing Role: Dual monolithic buck converter with independent input domains (VIN1/VIN2), robust overvoltage protection (18.5V trip), and anti-phase operation. Use Value: 18V OVP prevents damage from load-dump transients; 180° phase shift cuts input ripple by >70%, reducing bulk capacitor requirements. |
| Medical Wearable Sensors | Automotive Infotainment Subsystems |
Use Scenario: ECG patch with ultra-low-power MCU and analog front-end requiring stable 1.8V and 3.0V supplies from coin cell. IC Role / Device Role / Timing Role: High-efficiency dual buck regulator operating in Burst Mode® below 100µA load, with soft-start and precise ±1% output accuracy. Use Value: 5µA no-load IQ enables multi-week operation on CR2032; internal compensation eliminates external compensation components. |
Use Scenario: In-vehicle display unit drawing power from 12V battery with cold-crank tolerance down to 4.5V. IC Role / Device Role / Timing Role: Dual buck converter supporting dropout operation (100% duty cycle), undervoltage lockout (2.5V), and fast transient response for bursty display loads. Use Value: Maintains regulation during cranking events; 1A per channel supports backlight LED drivers and SoC cores simultaneously. |
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, 2.95V–18V input, but higher 25µA IQ and no Burst Mode®. | Higher output current suits more demanding loads, but less suitable for multi-day battery operation. | Select when >1A per rail is required and IQ <10µA is not critical. |
| MAX20073ATCB/V+T | 2.1MHz, 1A per channel, 3.5V–36V input, integrated FETs, but only 10µA IQ and no phase-shift capability. | Wider input range fits automotive 24V systems, but lacks inter-channel timing control for ripple reduction. | Select for 12V/24V automotive rails where extended VIN range outweighs phase flexibility. |
Compared with TPS65270RGET and MAX20073ATCB/V+T, the LTC3622IDE-2#TRPBF offers superior light-load efficiency via Burst Mode®, precise phase control for input ripple suppression, and tighter ±1% output accuracy - making it optimal for space-constrained, battery-sensitive dual-rail designs.
Availability
LTC3622IDE-2#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, handheld industrial scanners, and automotive infotainment subsystems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LTC3622IDE-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The LTC3622IDE-2#TRPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency DC/DC regulators, designed specifically for space-constrained, battery-operated systems demanding ultralow quiescent current and dual-rail flexibility.
FAQ
What is the switching frequency of the LTC3622IDE-2#TRPBF?
The LTC3622IDE-2#TRPBF operates at a fixed 2.25MHz switching frequency, enabling compact magnetics and reduced EMI filter size. It also supports external clock synchronization within ±50% of this nominal frequency, allowing system-level EMI management or noise avoidance in sensitive applications. This frequency is factory-set and cannot be adjusted via resistor or capacitor.
Does the LTC3622IDE-2#TRPBF support independent enable and power-good signaling per channel?
Yes, the LTC3622IDE-2#TRPBF provides fully independent RUN1/RUN2 enable inputs and PGOOD1/PGOOD2 open-drain status outputs. Each PGOOD asserts high after 32 clock cycles of valid regulation and pulls low if its respective output deviates beyond ±7.5% - enabling fault-isolated power sequencing and diagnostics in dual-rail systems.
How does the ILIM pin configure current limits on the LTC3622IDE-2#TRPBF?
The ILIM pin on the LTC3622IDE-2#TRPBF supports three configurations: tied to GND sets full 1.8A peak current limit for both channels; tied to INTVCC halves the limit to 0.9A per channel; biased to 1V configures asymmetric limits (1.8A on Channel 1, 0.9A on Channel 2). This eliminates need for external current-sense resistors in most applications.
Can the LTC3622IDE-2#TRPBF operate with different input voltages on VIN1 and VIN2?
Yes, the LTC3622IDE-2#TRPBF supports independent input rails: VIN1 powers Channel 1 and the INTVCC LDO, while VIN2 powers Channel 2 only. This allows flexible power domain partitioning - for example, using a primary battery for VIN1 and a backup rail for VIN2 - with no requirement for voltage matching between the two inputs.
What thermal performance can be expected from the LTC3622IDE-2#TRPBF in its DFN package?
The LTC3622IDE-2#TRPBF in the 14-pin DFN (3mm × 4mm) package achieves θJC = 4.4°C/W when the exposed GND pad is properly soldered to a thermal plane. With adequate PCB copper area, it sustains 1A per channel continuously at ambient temperatures up to 85°C. Derating is recommended above 125°C junction temperature to ensure 10-year reliability.
LTC3622IDE-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)
LTC3622IDE-2#TRPBF FAQ
1.How can I place an order for LTC3622IDE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622IDE-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 LTC3622IDE-2#TRPBF reliable?
The price and inventory of LTC3622IDE-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 LTC3622IDE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3622IDE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622IDE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622IDE-2#TRPBF?
LTC3622IDE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622IDE-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 LTC3622IDE-2#TRPBF?
For technical support, including LTC3622IDE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622IDE-2#TRPBF requirements.
6.How does Aetrix verify that LTC3622IDE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3622IDE-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 LTC3622IDE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3622IDE-2#TRPBF?
All LTC3622IDE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622IDE-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 LTC3622IDE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3622IDE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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