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Analog Devices Inc. LTC3622HDE-2#TRPBF
- Part No.:
- LTC3622HDE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622HDE-2#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,611
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Product details
Overview
LTC3622HDE-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), 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 - deployed in battery-powered handheld scanners and point-of-load supplies where efficiency at light load and compact layout are critical.
For engineers reviewing the LTC3622HDE-2#TRPBF datasheet, LTC3622HDE-2#TRPBF pinout, LTC3622HDE-2#TRPBF application, or LTC3622HDE-2#TRPBF equivalent, key selection criteria include its –40°C to 150°C junction temperature rating, 14-pin 3mm × 4mm DFN package, ±1% output voltage accuracy, and selectable Burst Mode® vs. pulse-skipping operation via MODE/SYNC pin.
Technical Context
The LTC3622HDE-2#TRPBF implements a constant-frequency peak-current-mode control architecture with internal compensation, enabling stable regulation across wide VIN/VOUT ranges. Its dual independent buck channels share a single INTVCC LDO and support synchronized external clocking with ±50% capture range.
Phase relationship between SW1 and SW2 is programmable via PHASE pin (0° or 180°) or dynamically controlled using duty-modulated external clock on MODE/SYNC. Current limit is configurable per channel via ILIM pin biasing - full-scale (1.8A), half-scale (0.9A), or asymmetric (1.8A/0.9A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.25MHz fixed, synchronizable ±50% - enables compact LC filter design with sub-2.2µH inductors and <10µF ceramic output capacitors. |
| Input Voltage Range | 2.7V to 17V - supports single-cell Li-ion up to 4S battery stacks and industrial 12V/15V rails without pre-regulation. |
| Output Voltage Range | 0.6V to VIN per channel - allows generation of core voltages (e.g., 0.8V, 1.2V) and I/O rails (3.3V, 5V) from same IC. |
| No-Load Quiescent Current | 5µA with both channels enabled - extends battery runtime in always-on sensor nodes and portable medical devices. |
| Output Voltage Accuracy | ±1% over line/load/temperature - ensures reliable logic-level compliance for FPGA, MCU, and ASIC power domains. |
| Peak Current Limit | 1.8A typical (full-scale ILIM) - provides robust short-circuit protection while supporting 1A continuous output per channel. |
| Operating Junction Temp | –40°C to 150°C - qualified for under-hood automotive modules and high-ambient industrial controllers. |
Pinout & Package
Package: 14-lead (3mm × 4mm) plastic DFN with exposed thermal pad (Pin 15 = GND). Requires soldering exposed pad to PCB ground plane for rated thermal performance (θJC = 4.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1 / SW2 | Channel 1 / Channel 2 switch node | Connects to respective power inductor; requires low-inductance layout and local ceramic bypass to minimize EMI and voltage spikes. |
| VIN1 / VIN2 | Independent input supplies per channel | Enables dual-rail operation (e.g., VIN1 = 12V for analog section, VIN2 = 5V for digital section); each powers its own high-side PMOS gate driver. |
| FB1 / FB2 | Feedback input for error amplifier | Senses output voltage divider; 0.6V reference enables precise VOUT programming; leakage <10nA preserves light-load accuracy. |
| RUN1 / RUN2 | Enable control input per channel | Active-high logic interface; pulls down to disable channel; internal 20nA pull-down prevents floating during power-up. |
| MODE/SYNC | Burst Mode select / external clock input | Tied to INTVCC → Burst Mode (5µA IQ); grounded → pulse-skipping (low ripple); driven by external clock → synchronization + phase control. |
| PHASE | Inter-channel phase configuration | Ground → 0° (in-phase); INTVCC → 180° (anti-phase); with external clock → edge-triggered phase shift (e.g., 90°). |
| ILIM | Per-channel current limit programming | GND → full limit (1.8A); INTVCC → half limit (0.9A); 1V bias → asymmetric (1.8A/0.9A) - enables mixed-load optimization. |
| PGOOD1 / PGOOD2 | Open-drain power-good indicator | Asserts after soft-start and remains high if VOUT within ±7.5%; 32-cycle delay on fault detection ensures noise immunity. |
| INTVCC | Internal LDO output (3.6V) | Powers internal circuitry and gate drivers; requires ≥1µF low-ESR ceramic capacitor directly at pin for stability and transient response. |
| GND | Power and signal ground | Exposed pad (Pin 15) must be soldered to PCB ground plane - failure causes thermal derating and potential shutdown at >125°C junction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 5µA total (both channels active) - enables multi-year battery life in IoT endpoint sensors with periodic wake-up cycles. |
| 100% duty-cycle dropout operation | Maintains regulation down to VIN ≈ VOUT - eliminates need for linear post-regulators in low-VIN scenarios like battery end-of-discharge. |
| Programmable inter-channel phase | 0° or 180° fixed, or dynamic edge-aligned shift via external clock - reduces input capacitor RMS current by up to 30% in anti-phase mode. |
| Integrated soft-start | 500µs ramp per channel - prevents inrush current and output overshoot during power-up or enable sequencing. |
| Internal compensation | Eliminates external compensation network - simplifies design, reduces BOM count, and guarantees stability with standard ceramic output capacitors. |
Applications
| Battery-Powered Handheld Scanners | Industrial Point-of-Load Supplies |
|---|---|
Use Scenario: Portable barcode scanner powered by single-cell Li-ion (2.7V–4.2V) requiring clean 1.2V core and 3.3V I/O rails. IC Role / Device Role / Timing Role: Dual-output buck regulator delivering regulated 1.2V/3.3V simultaneously; operates in Burst Mode® during standby to extend battery life. Use Value: 5µA no-load IQ enables >2-year shelf life; 2.25MHz switching allows use of tiny 1.5µH inductors and 10µF X7R ceramics, reducing board area by 40% vs. 1MHz designs. |
Use Scenario: Programmable logic controller (PLC) module needing isolated 5V and 2.5V supplies from 24V DC bus. IC Role / Device Role / Timing Role: Dual-channel step-down converter generating two independent, tightly regulated rails; uses anti-phase operation to minimize input ripple on shared 24V feed. Use Value: ±1% output accuracy ensures reliable FPGA configuration and ADC reference stability; 150°C junction rating supports operation in sealed enclosures without forced air cooling. |
| Portable Medical Monitoring Devices | Automotive Infotainment Power Management |
Use Scenario: Wearable ECG monitor with ultra-low-power MCU and analog front-end, powered by coin cell or small Li-poly. IC Role / Device Role / Timing Role: Primary power management IC providing 1.8V for MCU and 3.0V for analog sensors; leverages pulse-skipping mode for low-noise analog supply. Use Value: Selectable operating mode allows trade-off between efficiency (Burst) and analog PSRR (pulse-skipping); 0.6V feedback reference enables precise low-voltage rail generation. |
Use Scenario: In-vehicle display unit requiring 5V USB host power and 1.1V GPU core supply from 12V battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Dual buck regulator handling wide-input transients (4.5V–18V); enters 100% duty cycle during cold-crank to sustain 5V output. Use Value: VIN OVP (18.5V) protects against load-dump events; –40°C to 150°C qualification meets AEC-Q100 Grade 0 requirements for under-dash placement. |
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 |
|---|---|---|---|
| TPS65217CIRSLR | Single 3.3V/1.8V fixed-output PMIC; integrates LDOs, battery charger, and fuel gauge; 2.2MHz switching; 16-pin QFN. | Targeted at TI-based AM335x/AM437x processors; lacks adjustable VOUT and independent channel control. | Select when system uses TI Sitara SoCs and requires integrated battery management - not suitable for custom VOUT or discrete dual-rail designs. |
| MP2491DS-LF-Z | Dual 1.2A buck; 2.2MHz; adjustable VOUT; 16-pin QFN; 25µA IQ (both channels); no phase control or Burst Mode®. | Lower efficiency at light load; no programmable phase or advanced low-IQ modes; limited temp range (–40°C to 125°C). | Choose for cost-sensitive industrial applications where 150°C operation and ultralow IQ are not required - avoids Analog Devices licensing and premium pricing. |
Compared with TPS65217CIRSLR and MP2491DS-LF-Z, the LTC3622HDE-2#TRPBF uniquely combines 150°C operation, 5µA quiescent current, and per-channel phase/enable/control - making it optimal for high-reliability, battery-constrained, or thermally aggressive environments where flexibility and efficiency are non-negotiable.
Availability
LTC3622HDE-2#TRPBF is available at Aetrix Electronics and suitable for battery-powered handheld scanners, industrial point-of-load supplies, and portable medical monitoring devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3622HDE-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 precision instrumentation, industrial automation, communications, and aerospace markets.
The LTC3622HDE-2#TRPBF belongs to the LTC® µModule® and monolithic regulator product line, engineered specifically for high-efficiency, low-quiescent-current power conversion in space- and energy-constrained portable and embedded systems.
FAQ
What is the maximum junction temperature rating for the LTC3622HDE-2#TRPBF?
The LTC3622HDE-2#TRPBF is specified for operation from –40°C to 150°C junction temperature. This H-grade qualification enables deployment in high-ambient environments such as under-hood automotive modules or sealed industrial enclosures without active cooling. Thermal derating begins above 125°C, and the exposed pad must be soldered to a thermal plane to achieve θJC = 4.4°C/W.
How does the MODE/SYNC pin configure operation modes on the LTC3622HDE-2#TRPBF?
The MODE/SYNC pin on the LTC3622HDE-2#TRPBF selects between three functional states: tied to INTVCC enables Burst Mode® (5µA IQ, higher ripple); grounded enables pulse-skipping mode (lower ripple, ~25µA IQ); and driven by an external clock synchronizes switching and enables programmable phase shift. All configurations retain the 2.25MHz base frequency and ±50% sync range.
Can the LTC3622HDE-2#TRPBF generate different output voltages on each channel?
Yes, the LTC3622HDE-2#TRPBF supports independent output voltage programming on each channel via separate resistor dividers connected to FB1 and FB2. The formula VOUT = 0.6V × (1 + R2/R1) applies to both channels, allowing simultaneous generation of, for example, 1.2V and 3.3V from the same IC. Fixed-output variants (e.g., LTC3622-23/5) are not applicable to this adjustable part.
What is the purpose of the ILIM pin on the LTC3622HDE-2#TRPBF?
The ILIM pin on the LTC3622HDE-2#TRPBF configures per-channel peak current limits: grounding sets full-scale 1.8A; connecting to INTVCC halves it to 0.9A; biasing to 1V enables asymmetric limiting (1.8A on Channel 1, 0.9A on Channel 2). This allows optimized current handling for mismatched loads - e.g., powering a high-current processor core and low-current peripheral from the same device.
Does the LTC3622HDE-2#TRPBF support 100% duty-cycle operation?
Yes, the LTC3622HDE-2#TRPBF supports 100% duty-cycle dropout operation, maintaining regulation as VIN approaches VOUT. During dropout, it transitions intelligently between active switching and sleep mode to minimize quiescent current - critical for preserving battery capacity in end-of-discharge conditions. This behavior is inherent to its architecture and requires no external circuitry.
LTC3622HDE-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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LTC3622HDE-2#TRPBF FAQ
1.How can I place an order for LTC3622HDE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622HDE-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 LTC3622HDE-2#TRPBF reliable?
The price and inventory of LTC3622HDE-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 LTC3622HDE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3622HDE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622HDE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622HDE-2#TRPBF?
LTC3622HDE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622HDE-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 LTC3622HDE-2#TRPBF?
For technical support, including LTC3622HDE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622HDE-2#TRPBF requirements.
6.How does Aetrix verify that LTC3622HDE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3622HDE-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 LTC3622HDE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3622HDE-2#TRPBF?
All LTC3622HDE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622HDE-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 LTC3622HDE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3622HDE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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