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Analog Devices Inc. LTC3622EDE-23/5#TRPBF
- Part No.:
- LTC3622EDE-23/5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622EDE-23/5#TRPBF.pdf
- Description:
- IC REG BUCK 3.3V/5V 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,100
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Product details
Overview
LTC3622EDE-23/5#TRPBF from Analog Devices is a dual-channel, 17V-input, synchronous step-down DC/DC regulator in a 14-pin DFN (3mm × 4mm) package, delivering fixed 5V/3.3V outputs at up to 1A per channel with 2.25MHz switching frequency, ±1% output accuracy, and ultralow 5µA no-load quiescent current (both channels enabled). It targets space-constrained, battery-powered systems requiring dual regulated rails.
For engineers reviewing the LTC3622EDE-23/5#TRPBF datasheet, LTC3622EDE-23/5#TRPBF pinout, LTC3622EDE-23/5#TRPBF application, or LTC3622EDE-23/5#TRPBF equivalent, key selection factors include its fixed dual-output configuration, 2.25MHz operation for compact magnetics, phase-shift capability via PHASE pin, selectable current limit (ILIM), and Burst Mode® efficiency optimization for low-power portable designs.
Technical Context
The LTC3622EDE-23/5#TRPBF implements a constant-frequency, peak-current-mode control architecture with internal compensation and soft-start. Its two independent buck regulators share a common INTVCC LDO but operate with separate VIN1/VIN2 inputs, enabling flexible input sourcing.
It supports external synchronization over ±50% of its nominal 2.25MHz frequency and offers programmable phase shift (0° or 180°) via the PHASE pin - critical for reducing input ripple in multi-rail systems. The MODE/SYNC pin selects between Burst Mode® (for <4µA single-channel IQ) and pulse-skipping mode (for lower output ripple).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V (±1%) on Channel 1 and 3.3V (±1%) on Channel 2 - eliminates external feedback resistors and simplifies BOM. |
| Switching Frequency | 2.25MHz (±15%) - enables use of sub-5mm inductors and reduces solution footprint vs. 1MHz alternatives. |
| Input Voltage Range | 2.7V to 17V - supports wide-range industrial and battery-supplied inputs including 12V rails and Li-ion stacks. |
| Quiescent Current | 5µA (both channels active, no load) - extends battery life in always-on sensor nodes and handheld scanners. |
| Output Current | 1A per channel continuous - sufficient for powering microcontrollers, FPGAs, and analog front-ends simultaneously. |
| Accuracy | ±1% over line, load, and temperature - ensures stable logic-level compliance for 3.3V/5V I/O domains without margining overhead. |
| Package | 14-pin DFN (3mm × 4mm, 0.75mm height) with exposed thermal pad - provides low θJA (40°C/W) for thermally constrained PCBs. |
Pinout & Package
Package: 14-lead plastic DFN (3mm × 4mm), exposed pad (Pin 15) connected to GND for thermal and electrical integrity. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Channel 1 input supply | Accepts 2.7V–17V; powers INTVCC LDO - must be decoupled with ≥10µF ceramic capacitor. |
| PGOOD1 (Pin 2) | Channel 1 power-good indicator | Open-drain output asserting high when VOUT1 is within ±7.5% of 5V - used for system sequencing and fault monitoring. |
| MODE/SYNC (Pin 3) | Mode select & external clock input | Tied to INTVCC for Burst Mode®; grounded for pulse-skipping; accepts 0.4V–(INTVCC–0.3V) external clock for synchronization. |
| PHASE (Pin 4) | Inter-channel phase control | GND = 0° (in-phase); INTVCC = 180° (anti-phase) - reduces input ripple by interleaving switch currents. |
| PGOOD2 (Pin 5) | Channel 2 power-good indicator | Open-drain output asserting high when VOUT2 is within ±7.5% of 3.3V - enables independent rail validation. |
| ILIM (Pin 6) | Current limit configuration | GND = full 1.8A limit; INTVCC = 0.9A limit; 1V bias = 1.8A on Ch1 / 0.9A on Ch2 - prevents inductor saturation under overload. |
| VIN2 (Pin 7) | Channel 2 input supply | Independent 2.7V–17V input - allows different source voltages per rail (e.g., 12V for Ch1, 5V for Ch2). |
| SW2 (Pin 8) | Channel 2 switch node | Connects to inductor and low-side MOSFET - requires tight layout with minimal loop area to reduce EMI. |
| RUN2 (Pin 9) | Channel 2 enable control | Logic-high (>0.35V) activates regulator; must not float - enables independent power sequencing. |
| FB2 (Pin 10) | Channel 2 feedback input | Internally tied to 3.3V output - no external resistor needed; bypass with 1µF capacitor if noise-sensitive. |
| INTVCC (Pin 11) | Internal LDO output | 3.6V (±0.3V) supply for gate drivers and logic - requires ≥1µF low-ESR ceramic capacitor to GND. |
| FB1 (Pin 12) | Channel 1 feedback input | Internally tied to 5V output - no external resistor needed; avoids feedback divider errors and drift. |
| RUN1 (Pin 13) | Channel 1 enable control | Logic-high (>0.35V) activates regulator - supports staggered startup or fault-isolated shutdown. |
| SW1 (Pin 14) | Channel 1 switch node | Connects to inductor and low-side MOSFET - layout symmetry with SW2 improves thermal balance in dual-rail layouts. |
| GND (Pin 15) | Power and signal ground | Exposed thermal pad - must be soldered to ≥2cm² copper pour for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces no-load IQ to 5µA (dual) or <4µA (single channel), extending battery runtime in sleep-state IoT endpoints. |
| Fixed 5V/3.3V outputs | Eliminates external feedback networks - improves accuracy, reduces component count, and removes resistor tolerance drift effects. |
| 180° phase-shift capability | Halves input ripple current amplitude vs. in-phase operation - lowers required input capacitance and reduces EMI filtering cost. |
| Programmable current limit | Three ILIM states (full, half, asymmetric) allow tailored protection for mismatched loads - prevents false OCP trips during transient surges. |
| 2.25MHz switching | Enables use of 1µH–4.7µH inductors - shrinks total solution size by >30% compared to 1MHz equivalents in portable designs. |
| Integrated soft-start | 500µs monotonic ramp per channel - prevents inrush current and output overshoot during power-up or recovery from UVLO. |
Applications
| Battery-Powered Handheld Scanners | Industrial Point-of-Load Supplies |
|---|---|
Use Scenario: Compact barcode scanner with ARM Cortex-M7 MCU (3.3V core), CMOS image sensor (5V analog), and BLE radio (3.3V I/O). IC Role / Device Role / Timing Role: Dual-output power manager providing isolated, sequenced 5V and 3.3V rails from a single-cell Li-ion (3.0–4.2V) or 2S pack (6–8.4V) via boost-buck front-end. Use Value: Fixed outputs eliminate calibration overhead; Burst Mode® extends scan-time battery life to >12 hours; 2.25MHz operation fits within 12mm × 12mm PCB area. |
Use Scenario: Programmable logic controller (PLC) module requiring clean, independently controlled 5V (I/O) and 3.3V (FPGA core) rails from a 24V industrial bus. IC Role / Device Role / Timing Role: Dual synchronous buck converter with anti-phase switching to minimize input capacitor stress and meet EN 61000-4-5 surge immunity requirements. Use Value: 17V max input withstands 24V transients; PGOOD signals enable watchdog-triggered safe shutdown; ILIM asymmetry protects FPGA core during configuration bursts. |
| Portable Medical Sensors | Automotive Infotainment Subsystem |
Use Scenario: Wearable ECG monitor with ultra-low-power ADC (3.3V), RF transceiver (5V), and flash memory (3.3V), powered by coin cell or rechargeable LiPo. IC Role / Device Role / Timing Role: Primary DC/DC regulator delivering regulated dual rails while maintaining <5µA quiescent draw during patient-monitoring standby. Use Value: No external resistors reduce leakage paths; 14-pin DFN fits into 8mm × 8mm wearable form factor; phase-shift minimizes noise coupling into analog front-end. |
Use Scenario: In-dash display unit with LCD backlight driver (5V), touch controller (3.3V), and audio codec (3.3V), supplied from 12V automotive battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Dual buck regulator supporting 2.7V–17V input range to survive 4.5V cold-crank events and 18.5V load-dump transients (with automatic shutdown). Use Value: VIN OVLO (18.5V) and UVLO (2.5V) protect downstream ICs; independent RUN pins allow display subsystem power gating; fixed outputs ensure consistent timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270RGET | Fixed 3.3V/1.8V outputs; 2.2MHz switching; 3.5V–18V input; no phase-shift control; higher 12µA IQ (dual) | Targets digital SoCs needing 1.8V core + 3.3V I/O - unsuitable where 5V rail is mandatory. | Select when 1.8V rail is required and phase control is unnecessary; verify compatibility with 5V-dependent peripherals. |
| MP2491DS-LF-Z | Adjustable outputs only; 2.2MHz; 4.5V–18V input; no Burst Mode®; 25µA IQ; requires external feedback resistors | Designed for cost-sensitive industrial supplies where output flexibility outweighs efficiency demands. | Choose for non-fixed voltage needs and higher input minimums; accept larger solution size and reduced light-load efficiency. |
Compared with TPS65270RGET and MP2491DS-LF-Z, the LTC3622EDE-23/5#TRPBF uniquely delivers factory-trimmed 5V/3.3V outputs with sub-5µA quiescent current and programmable phase shift - making it optimal for space- and battery-limited dual-rail systems where fixed voltages and ultra-low standby power are mandatory.
Availability
LTC3622EDE-23/5#TRPBF is available at Aetrix Electronics and suitable for battery-powered handheld scanners, portable medical sensors, and industrial point-of-load supplies requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for LTC3622EDE-23/5#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 LTC3622 family was designed specifically for dual-rail, low-quiescent-power DC/DC conversion in portable and energy-conscious systems - emphasizing integration, efficiency across load ranges, and robustness in variable-input environments.
FAQ
What are the fixed output voltages of the LTC3622EDE-23/5#TRPBF?
The LTC3622EDE-23/5#TRPBF provides factory-trimmed fixed outputs: Channel 1 delivers 5.0V (±1%) and Channel 2 delivers 3.3V (±1%). These values are internally set - no external feedback resistors are required, ensuring accuracy and eliminating resistor tolerance drift. This configuration is confirmed in the Electrical Characteristics table (VOUT1 and VOUT2 parameters) and Order Information section of the datasheet.
Does the LTC3622EDE-23/5#TRPBF support external frequency synchronization?
Yes, the LTC3622EDE-23/5#TRPBF supports external synchronization via the MODE/SYNC pin. It accepts an external clock signal with amplitude from 0.4V to (INTVCC – 0.3V) and locks to frequencies within ±50% of its nominal 2.25MHz switching frequency. When synchronized, the device operates in pulse-skipping mode, and phase shift can be further refined using the PHASE pin and external clock edge modulation.
How does the ILIM pin function on the LTC3622EDE-23/5#TRPBF?
The ILIM pin on the LTC3622EDE-23/5#TRPBF configures peak current limits for both channels: grounding sets 1.8A per channel; tying to INTVCC halves it to 0.9A; biasing to 1V sets 1.8A on Channel 1 and 0.9A on Channel 2. This is verified in the Electrical Characteristics table (ILIM parameter) and Pin Functions description, enabling tailored overcurrent protection for asymmetric loads.
What is the quiescent current of the LTC3622EDE-23/5#TRPBF under no-load conditions?
The LTC3622EDE-23/5#TRPBF draws 5µA of input quiescent current with both channels enabled and no load, and less than 4µA with only one channel enabled - measured in Burst Mode® operation. These values are specified in the Electrical Characteristics table (IQ parameter) and confirmed in Typical Performance Characteristics (Figure G07), making it suitable for battery-critical applications.
Can the LTC3622EDE-23/5#TRPBF operate with different input voltages on VIN1 and VIN2?
Yes, the LTC3622EDE-23/5#TRPBF supports independent input supplies: VIN1 powers Channel 1 and the INTVCC LDO, while VIN2 powers Channel 2. Both accept 2.7V–17V and may differ - e.g., VIN1 = 12V (for 5V rail), VIN2 = 5V (for 3.3V rail). This is explicitly stated in the Pin Functions description and Absolute Maximum Ratings table.
LTC3622EDE-23/5#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:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 3.3V, 5V
- Voltage - Output (Max):
- -
- 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-23/5#TRPBF FAQ
1.How can I place an order for LTC3622EDE-23/5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622EDE-23/5#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-23/5#TRPBF reliable?
The price and inventory of LTC3622EDE-23/5#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-23/5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3622EDE-23/5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622EDE-23/5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622EDE-23/5#TRPBF?
LTC3622EDE-23/5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622EDE-23/5#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-23/5#TRPBF?
For technical support, including LTC3622EDE-23/5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622EDE-23/5#TRPBF requirements.
6.How does Aetrix verify that LTC3622EDE-23/5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3622EDE-23/5#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-23/5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3622EDE-23/5#TRPBF?
All LTC3622EDE-23/5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622EDE-23/5#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-23/5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3622EDE-23/5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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