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Analog Devices Inc. LTC3622IDE#TRPBF
- Part No.:
- LTC3622IDE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622IDE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,106
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Product details
Overview
LTC3622IDE#TRPBF from Analog Devices is a dual-channel, 1A synchronous step-down DC/DC regulator with fixed 1MHz switching frequency, ultralow 5µA no-load quiescent current (both channels enabled), and adjustable 0.6V–VIN output voltage per channel. It operates from 2.7V to 17V input and delivers high efficiency (>95%) across wide load ranges - ideal for battery-powered portable scanners requiring compact, low-power dual-rail supplies.
For engineers reviewing the LTC3622IDE#TRPBF datasheet, LTC3622IDE#TRPBF pinout, LTC3622IDE#TRPBF application, or LTC3622IDE#TRPBF equivalent, key selection criteria include its dual independent RUN control, ±1% output voltage accuracy, 14-pin DFN (3mm × 4mm) package with exposed thermal pad, selectable Burst Mode® vs pulse-skipping operation, and phase-shift programmability via PHASE/MODE/SYNC pins.
Technical Context
The LTC3622IDE#TRPBF implements a constant-frequency peak-current-mode control architecture with internal compensation and soft-start. Each channel features independent feedback (FB1/FB2), RUN enable (RUN1/RUN2), and power-good (PGOOD1/PGOOD2) signaling, enabling flexible sequencing and fault monitoring in multi-rail systems.
It supports external clock synchronization (±50% range), programmable 0° or 180° inter-channel phase shift, and selectable current limit (via ILIM pin). The device integrates matched P- and N-channel MOSFETs with RDS(ON) of 0.15Ω (NMOS) and 0.37Ω (PMOS) at VIN = 5V, enabling high-efficiency operation down to 100% duty cycle in dropout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and battery-supplied systems including 12V nominal rails and Li-ion stacks. |
| Output Voltage Range | 0.6V to VIN per channel - enables generation of sub-1V core supplies and standard 3.3V/2.5V/1.8V rails using external resistive dividers. |
| Max Output Current | 1A per channel - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained portable designs. |
| Quiescent Current | 5µA (both channels active, no load) - extends battery life in always-on or low-duty-cycle handheld equipment. |
| Switching Frequency | Fixed 1MHz - allows use of small, low-profile inductors (e.g., 4.7µH) and reduces EMI filtering complexity. |
| Output Accuracy | ±1% over temperature and line/load - ensures stable regulation for precision analog and digital loads without post-regulation. |
| Package | 14-pin DFN (3mm × 4mm, exposed pad) - provides low thermal resistance (θJA = 40°C/W) and compact footprint for dense PCB layouts. |
Pinout & Package
Package: 14-lead plastic DFN (3mm × 4mm) with exposed thermal pad (Pin 15 = GND), rated for –40°C to 125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Channel 1 input supply | Primary input for first buck stage; also powers INTVCC LDO - must be ≥2.7V and ≤17V. |
| PGOOD1 | Open-drain status flag | Asserts high after regulation achieved; pulls low if VOUT1 deviates >7.5% - used for system power sequencing. |
| MODE/SYNC | Mode select & sync input | Tie to INTVCC for Burst Mode® (max efficiency); tie to GND for pulse-skipping (low ripple); accept external clock for synchronization. |
| PHASE | Inter-channel phase control | Tie to GND for 0° (in-phase); tie to INTVCC for 180° (anti-phase) - reduces input capacitor RMS current and EMI. |
| PGOOD2 | Channel 2 status flag | Independent open-drain indicator for second rail - enables fault isolation in dual-output systems. |
| ILIM | Current limit configuration | GND = full 1.8A limit; INTVCC = 0.9A limit; 1V bias = asymmetric limit (1.8A Ch1 / 0.9A Ch2). |
| VIN2 | Channel 2 input supply | Independent input - may differ from VIN1 (e.g., separate battery or rail), enabling true dual-input operation. |
| SW2 | Channel 2 switch node | Connects to inductor and output capacitor - requires low-inductance layout to minimize switching noise and EMI. |
| RUN2 | Channel 2 enable input | Logic-high activates Ch2; must not float - enables independent power-up sequencing and dynamic rail control. |
| FB2 | Channel 2 feedback input | Senses divided output voltage; sets VOUT2 = 0.6V × (1 + R2/R1) - connect directly to VOUT for fixed-output variants. |
| INTVCC | Internal LDO output | 3.3V–3.9V regulated supply for gate drivers and logic; bypass with ≥1µF low-ESR capacitor to GND. |
| FB1 | Channel 1 feedback input | Identical function to FB2 - supports independent output programming for asymmetric dual-rail configurations. |
| RUN1 | Channel 1 enable input | Independent logic-level enable for Ch1 - supports staggered startup, standby mode, or fault shutdown. |
| SW1 | Channel 1 switch node | High dv/dt node - requires tight layout, ground plane clearance, and minimized loop area to reduce radiated emissions. |
| GND | Power and signal ground | Exposed pad (Pin 15) must be soldered to PCB ground plane for thermal performance and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent RUN inputs | Enables precise power sequencing, dynamic rail enable/disable, and fault containment between channels. |
| Burst Mode® operation | Reduces no-load IQ to 5µA while maintaining regulation - critical for multi-day battery life in portable instruments. |
| 180° phase-shift capability | Cuts input capacitor RMS current by ~30% and lowers peak input ripple - simplifies input filter design and EMI compliance. |
| Internal soft-start (500µs) | Prevents inrush current and output overshoot during power-up - eliminates need for external timing components. |
| 100% duty-cycle dropout mode | Maintains regulation as VIN approaches VOUT - extends usable battery voltage range without external LDOs. |
| ±50% external clock sync | Allows synchronization to system master clock or adjacent converters to avoid beat frequencies and simplify EMI filtering. |
Applications
| Handheld Barcode Scanners | Industrial IoT Sensor Nodes |
|---|---|
Use Scenario: Compact, battery-operated scanner with CMOS image sensor, MCU, and Bluetooth radio requiring isolated 3.3V and 1.8V rails. IC Role / Device Role / Timing Role: Dual-output step-down regulator providing independently sequenced, low-noise power rails with integrated PGOOD monitoring. Use Value: Ultralow 5µA quiescent current extends single-charge battery life beyond 7 days in sleep mode; 1MHz switching enables <3mm × 3mm total power solution size. |
Use Scenario: Wireless environmental sensor node powered by Li-SOCl₂ primary cell, needing long-term stability and minimal self-discharge. IC Role / Device Role / Timing Role: Primary power management IC delivering regulated 3.3V for RF transceiver and 2.5V for precision ADC/sensor interface. Use Value: 100% duty-cycle operation sustains regulation down to 2.8V input, maximizing energy extraction from aging primary cells; ±1% accuracy ensures sensor measurement integrity. |
| Point-of-Load Supplies in Test Equipment | Portable Medical Diagnostic Devices |
Use Scenario: Benchtop multimeter or oscilloscope module requiring clean, low-noise analog and digital supplies from shared 12V input. IC Role / Device Role / Timing Role: Dual-channel buck converter generating isolated 5V (digital) and 3.3V (analog) rails with anti-phase switching to suppress input ripple. Use Value: 180° phase shift reduces input capacitor RMS current by 28%, allowing smaller 10µF ceramic instead of 22µF - saving board space and cost. |
Use Scenario: Portable ultrasound probe with FPGA, analog front-end, and display backlight, operating from rechargeable Li-ion pack. IC Role / Device Role / Timing Role: High-efficiency dual regulator supplying 1.2V FPGA core and 3.3V I/O rails, with independent RUN control for power-state transitions. Use Value: Independent RUN1/RUN2 pins enable dynamic power gating of FPGA logic blocks during idle periods, reducing average system power by >40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270RGET | 2.2MHz fixed frequency; higher 12µA IQ; no Burst Mode®; requires external compensation. | Optimized for higher-frequency, lower-inductance designs; less suitable for ultra-low-IQ battery applications. | Select when board space is constrained and 2.2MHz operation is preferred over lowest possible quiescent current. |
| MP2491DS-LF-Z | Single-channel only; 2A output; 28µA IQ; no phase-shift or dual-RUN capability. | Requires two separate ICs to match dual-rail functionality - increases BOM count, layout area, and cost. | Choose only if dual-channel integration is unnecessary and higher per-channel current (2A) is required. |
Compared with TPS65270RGET and MP2491DS-LF-Z, the LTC3622IDE#TRPBF uniquely combines dual independent 1A outputs, 5µA quiescent current, programmable phase shift, and integrated soft-start in a single 3mm × 4mm DFN - making it optimal for space- and power-sensitive portable instrumentation where rail independence and battery longevity are critical.
Availability
LTC3622IDE#TRPBF is available at Aetrix Electronics and suitable for handheld scanners, industrial sensor nodes, and portable medical diagnostic devices requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3622IDE#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.
The LTC3622IDE#TRPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency monolithic DC/DC regulators, designed specifically for battery-powered and space-constrained applications demanding ultralow quiescent current and dual-rail flexibility.
FAQ
What is the maximum input voltage rating for the LTC3622IDE#TRPBF?
The LTC3622IDE#TRPBF has an absolute maximum input voltage rating of 17V on VIN1 and VIN2 pins. It also features built-in overvoltage protection that suspends operation if either input exceeds 18.5V, resuming automatically once voltage drops below 18.2V. This protects internal MOSFETs during transient events without requiring external clamping circuits.
Does the LTC3622IDE#TRPBF support fixed-output voltage configurations?
The LTC3622IDE#TRPBF itself is the adjustable-output variant (LTC3622 series). Fixed-output versions exist (e.g., LTC3622-23/5 for 5V/3.3V), but the LTC3622IDE#TRPBF requires external resistor dividers on FB1 and FB2 to set output voltages from 0.6V to VIN. For fixed outputs, connect FBx directly to VOUTx - the internal 0.6V reference remains active.
How does the PHASE pin affect EMI performance in the LTC3622IDE#TRPBF?
When the PHASE pin is tied to INTVCC, the LTC3622IDE#TRPBF operates channels 1 and 2 180° out-of-phase, reducing input capacitor RMS current by up to 30% and lowering peak-to-peak input voltage ripple. This directly eases EMI filter requirements and improves conducted emission margins - especially beneficial in compact enclosures where shielding is limited.
Can the LTC3622IDE#TRPBF operate with only one channel enabled?
Yes - the LTC3622IDE#TRPBF supports independent channel control via RUN1 and RUN2. With only one channel enabled, quiescent current drops to <4µA (vs. 5µA with both active), and the disabled channel draws negligible current. This enables dynamic power scaling in systems where rail demand varies over time, such as sensor wake-up cycles.
What thermal considerations apply to the LTC3622IDE#TRPBF's exposed pad?
The exposed thermal pad (Pin 15) of the LTC3622IDE#TRPBF must be soldered to a solid PCB ground plane to achieve specified θJA = 40°C/W. Inadequate thermal connection raises junction temperature, potentially triggering thermal shutdown at 150°C or degrading long-term reliability. Use ≥4 thermal vias (0.3mm diameter) under the pad, connected to inner-layer ground planes.
LTC3622IDE#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)
LTC3622IDE#TRPBF FAQ
1.How can I place an order for LTC3622IDE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622IDE#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#TRPBF reliable?
The price and inventory of LTC3622IDE#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3622IDE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622IDE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622IDE#TRPBF?
LTC3622IDE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622IDE#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#TRPBF?
For technical support, including LTC3622IDE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622IDE#TRPBF requirements.
6.How does Aetrix verify that LTC3622IDE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3622IDE#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3622IDE#TRPBF?
All LTC3622IDE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622IDE#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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3622IDE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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