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Analog Devices Inc. LTC3622EDE#TRPBF
- Part No.:
- LTC3622EDE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622EDE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,768
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Product details
Overview
LTC3622EDE#TRPBF from Analog Devices is a dual-channel, 1A synchronous step-down DC/DC regulator with ultralow 5µA no-load quiescent current (both channels enabled), fixed 1MHz switching frequency, and input voltage range of 2.7V to 17V. It delivers adjustable 0.6V–VIN outputs per channel and supports phase-shifted operation for reduced input ripple-used in battery-powered handheld scanners requiring high light-load efficiency and compact dual-rail power.
For engineers reviewing the LTC3622EDE#TRPBF datasheet, LTC3622EDE#TRPBF pinout, LTC3622EDE#TRPBF application, or LTC3622EDE#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed dual-output timing behavior, real-world efficiency vs. load curves, and two rigorously cross-checked alternative parts for point-of-load supply design.
Technical Context
The LTC3622EDE#TRPBF implements a constant-frequency peak-current-mode control architecture with internal compensation, enabling stable regulation across 2.7V–17V input and 0.6V–VIN output ranges. Each channel features independent RUN control, programmable current limit via ILIM pin, and selectable Burst Mode® (≤5µA IQ) or pulse-skipping operation via MODE/SYNC pin.
It supports external clock synchronization ±50% around its native 1MHz frequency and offers 0° or 180° inter-channel phase shift via PHASE pin-critical for minimizing input capacitor RMS current in dual-output systems. PGOOD1/PGOOD2 open-drain indicators provide ±7.5% output voltage monitoring with 32-cycle response delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and battery-supplied systems without pre-regulation. |
| Output Current per Channel | 1A continuous - enables dual independent rails for FPGA core/I/O or processor + peripheral supplies. |
| Quiescent Current | 5µA (both channels active, no load) - extends battery life in always-on portable devices. |
| Switching Frequency | 1MHz (fixed) - allows use of small 4.7µH inductors and compact ceramic output capacitors. |
| Feedback Reference Voltage | 0.6V ±1% - enables precise low-voltage regulation (e.g., 1.2V @ 2% resistor tolerance). |
| Output Voltage Accuracy | ±1% over line/load/temperature - ensures reliable logic-level compliance for 1.8V/2.5V/3.3V digital rails. |
| Package | 14-lead (3mm × 4mm) DFN with exposed thermal pad - provides 4.4°C/W junction-to-case thermal resistance for high-power-density layouts. |
Pinout & Package
14-lead (3mm × 4mm) plastic DFN package with exposed GND pad (Pin 15), rated for –40°C to 125°C operating junction temperature. Thermal pad must be soldered to PCB for specified electrical and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Channel 1 input supply | Powers CH1 switch and INTVCC LDO; max 17V rating protects against transient overvoltage. |
| PGOOD1 (Pin 2) | CH1 power-good indicator | Open-drain output asserts high after regulation achieved; deasserts within 32 cycles if VOUT deviates >±7.5%. |
| MODE/SYNC (Pin 3) | Operation mode select & sync input | Tied to INTVCC = Burst Mode (ultralow IQ); tied to GND = pulse-skipping (low ripple); driven by external clock = synchronized operation. |
| PHASE (Pin 4) | Inter-channel phase control | GND = 0° in-phase; INTVCC = 180° anti-phase - reduces input capacitor RMS current by up to 30%. |
| PGOOD2 (Pin 5) | CH2 power-good indicator | Independent open-drain status signal identical in function and timing to PGOOD1. |
| ILIM (Pin 6) | Current limit configuration | GND = full 1.8A limit; INTVCC = 0.9A limit; 1V bias = CH1 full / CH2 half - enables asymmetric load handling. |
| VIN2 (Pin 7) | Channel 2 input supply | Independent input rail; may differ from VIN1 - supports split-input architectures (e.g., primary + backup source). |
| SW2 (Pin 8) | CH2 switch node | Connects to CH2 inductor; requires tight layout to minimize EMI and gate drive loop inductance. |
| RUN2 (Pin 9) | CH2 enable control | Logic-high activates CH2; must not float - enables independent sequencing of dual outputs. |
| FB2 (Pin 10) | CH2 feedback input | Senses divided VOUT2; 10nA input bias enables high-value resistive dividers for low power loss. |
| INTVCC (Pin 11) | Internal LDO output | 3.6V ±0.15V regulated supply for gate drivers and logic; bypass with ≥1µF low-ESR ceramic capacitor. |
| FB1 (Pin 12) | CH1 feedback input | Identical function to FB2; supports independent output programming per channel. |
| RUN1 (Pin 13) | CH1 enable control | Independent logic-enable input; allows staggered startup or dynamic channel disable. |
| SW1 (Pin 14) | CH1 switch node | Connects to CH1 inductor; shares same layout constraints as SW2 for EMI control. |
| GND (Pin 15) | Power and signal ground | Exposed thermal pad - mandatory connection to PCB ground plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces no-load IQ to 5µA (both channels) - extends runtime in battery-backed IoT sensors and wearables. |
| Programmable inter-channel phase | 0° or 180° shift via PHASE pin - cuts input capacitor RMS current by ~30%, lowering size/cost in dual-rail designs. |
| Independent RUN control per channel | Enables flexible power sequencing (e.g., VDDIO before VDDCORE) without external logic or delay circuits. |
| External clock synchronization | ±50% sync range around 1MHz - eliminates beat frequencies in multi-converter systems (e.g., baseband + RF rails). |
| 100% duty cycle dropout operation | Maintains regulation down to VIN ≈ VOUT - critical for Li-ion battery discharge down to 3.0V while powering 3.3V rails. |
| Integrated soft-start (500µs) | Prevents inrush current during startup - eliminates need for external soft-start circuitry in space-constrained modules. |
Applications
| Battery-Powered Handheld Scanners | Industrial Point-of-Load Supplies |
|---|---|
|
Use Scenario: Portable barcode scanner powered by single-cell Li-ion (2.7–4.2V) requiring clean 3.3V I/O and 1.2V processor rails. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing independent, sequenced, low-noise outputs with ultralow standby IQ. Use Value: 5µA quiescent current extends battery life beyond 6 months in sleep mode; 1MHz switching enables <3mm² total passive area per channel. |
Use Scenario: Programmable logic controller (PLC) module needing isolated 5V and 2.5V rails from 24V DC bus. IC Role / Device Role / Timing Role: Dual-channel step-down converter delivering tightly regulated, phase-shifted outputs with robust input transient protection. Use Value: 17V absolute max input rating withstands 40V transients; ±1% output accuracy ensures reliable ADC reference and FPGA I/O voltage compliance. |
| Portable Medical Monitoring Devices | Automotive Infotainment Subsystems |
|
Use Scenario: Wearable ECG monitor using coin cell (3V) to generate 1.8V analog front-end and 3.0V BLE radio supplies. IC Role / Device Role / Timing Role: High-efficiency dual buck managing ultra-low-power analog and digital domains with independent enable control. Use Value: Burst Mode® achieves >85% efficiency at 100µA load; independent RUN pins allow dynamic shutdown of BLE when idle. |
Use Scenario: In-vehicle display unit deriving 5V USB and 1.1V SoC core rails from 12V automotive battery (9–16V range). IC Role / Device Role / Timing Role: Dual synchronous regulator with integrated OVP (18.5V trip) and UVLO (2.5V) for harsh automotive environments. Use Value: Input overvoltage lockout prevents damage during load dump; 125°C junction rating supports under-hood placement. |
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 |
|---|---|---|---|
| TPS65270RGET | 2.2MHz fixed frequency, 2A per channel, 2.95–6.5V input, no Burst Mode, higher IQ (25µA) | Optimized for low-profile, high-current applications where board space is constrained but input voltage is limited to ≤6.5V | Select when higher output current and smaller inductors are needed, and input stays below 6.5V; avoid for battery systems requiring sub-3V start-up. |
| MAX20404ATPA/VY+ | 2.2MHz, 3A per channel, 2.5–5.5V input, spread-spectrum, 12µA IQ, no phase-shift control | Targets noise-sensitive applications (e.g., camera modules) where EMI reduction is prioritized over ultra-low IQ | Choose for automotive camera power where spread-spectrum and 3A capability matter more than 5µA IQ or 17V input support. |
Compared with TPS65270RGET and MAX20404ATPA/VY+, the LTC3622EDE#TRPBF uniquely combines 17V input capability, 5µA quiescent current, and programmable inter-channel phase in a 3mm × 4mm DFN-making it optimal for wide-input, battery-critical dual-rail systems where thermal density and light-load efficiency are paramount.
Availability
LTC3622EDE#TRPBF is available at Aetrix Electronics and suitable for battery-powered handheld scanners, industrial PLC modules, and portable medical monitoring devices requiring stable component supply and long-term lifecycle assurance.
Supply support for LTC3622EDE#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 (now part of Analog Devices, Inc., following merger with Maxim Integrated) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3622 series belongs to Analog Devices' Power by Linear™ portfolio, designed specifically for high-efficiency, ultralow-IQ dual-output DC/DC conversion in space- and energy-constrained portable and industrial systems.
FAQ
What is the maximum input voltage rating for the LTC3622EDE#TRPBF?
The LTC3622EDE#TRPBF has an absolute maximum input voltage rating of 17V on VIN1 and VIN2 pins. It also includes built-in overvoltage protection that disables both regulators if either input exceeds 18.5V, resuming operation only after voltage drops below 18.2V. This protects internal MOSFETs during automotive load-dump or industrial transient events.
Does the LTC3622EDE#TRPBF support fixed-output voltage configurations?
The LTC3622EDE#TRPBF is the adjustable version of the family and does not integrate fixed-output resistors. To implement fixed outputs, external resistor dividers must be connected to FB1 and FB2. Fixed-output variants (e.g., LTC3622-23/5) exist but are distinct part numbers with different markings and internal feedback networks.
How does the PHASE pin affect system-level performance in the LTC3622EDE#TRPBF?
The PHASE pin on the LTC3622EDE#TRPBF selects 0° (in-phase) or 180° (anti-phase) operation between channels. Anti-phase reduces input capacitor RMS current by up to 30%, allowing smaller, lower-cost input bulk capacitors and lowering conducted EMI - especially valuable in compact dual-rail power supplies like those in handheld test equipment.
Can the LTC3622EDE#TRPBF operate with only one channel enabled?
Yes - the LTC3622EDE#TRPBF supports independent channel control via RUN1 and RUN2 pins. When only one channel is active, quiescent current drops to <4µA, and the disabled channel's switches remain fully off. This enables dynamic power scaling in systems where rail demand varies (e.g., disabling a sensor supply during idle periods).
What thermal considerations apply to the LTC3622EDE#TRPBF in its 14-lead DFN package?
The LTC3622EDE#TRPBF in the 14-lead (3mm × 4mm) DFN package has θJC = 4.4°C/W and requires soldering of the exposed GND pad to a PCB thermal plane. Without proper pad connection, thermal resistance increases significantly, risking junction temperature exceedance above 125°C under 1A load - potentially triggering thermal shutdown or reducing reliability.
LTC3622EDE#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:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LTC3622EDE#TRPBF FAQ
1.How can I place an order for LTC3622EDE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622EDE#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#TRPBF reliable?
The price and inventory of LTC3622EDE#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3622EDE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622EDE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622EDE#TRPBF?
LTC3622EDE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622EDE#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#TRPBF?
For technical support, including LTC3622EDE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622EDE#TRPBF requirements.
6.How does Aetrix verify that LTC3622EDE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3622EDE#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3622EDE#TRPBF?
All LTC3622EDE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622EDE#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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3622EDE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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