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Analog Devices Inc. LTC3622EDE-2#PBF
- Part No.:
- LTC3622EDE-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622EDE-2#PBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:171
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Product details
Overview
LTC3622EDE-2#PBF 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 adjustable 0.6V–VIN output per channel. It operates from 2.7V to 17V input and delivers high efficiency (>95%) in battery-powered portable scanners and point-of-load systems.
For engineers reviewing the LTC3622EDE-2#PBF datasheet, LTC3622EDE-2#PBF pinout, LTC3622EDE-2#PBF application, or LTC3622EDE-2#PBF equivalent, key selection considerations include its dual-output synchronization capability, ±1% output voltage accuracy, selectable Burst Mode® vs pulse-skipping operation, and 14-pin 3mm × 4mm DFN package with exposed thermal pad.
Technical Context
The LTC3622EDE-2#PBF implements a constant-frequency peak current mode control architecture with internal compensation, enabling stable regulation across wide load and line variations. Its two independent buck channels share a common INTVCC LDO and support phase-shifted operation via PHASE and MODE/SYNC pins.
It features programmable current limiting (1.6A/0.8A per channel via ILIM), 180° out-of-phase operation for reduced input ripple, and integrated overvoltage (18.5V) and undervoltage (2.5V) protection on both VIN1 and VIN2 inputs. The device enters dropout at 100% duty cycle while maintaining ultralow IQ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 2.25MHz ±50% sync range - enables compact filter design with small inductors & capacitors. |
| Input Voltage Range | 2.7V to 17V - supports single-cell Li-ion up to 12V industrial rails without external pre-regulation. |
| Output Voltage Range | 0.6V to VIN per channel - allows generation of sub-1V core supplies and standard 3.3V/2.5V I/O rails. |
| No-Load Quiescent Current | 5µA (both channels active), <4µA (one channel active) - extends battery life in always-on portable devices. |
| Output Voltage Accuracy | ±1% over temperature and line/load - ensures reliable power sequencing and system-level voltage margining. |
| Peak Current Limit | Selectable 1.6A (ILIM = GND) or 0.8A (ILIM = INTVCC) per channel - provides flexible short-circuit protection tuning. |
| Package | 14-pin 3mm × 4mm DFN with exposed thermal pad - delivers θJC = 4.4°C/W for high-power-density thermal management. |
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 and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Channel 1 input supply | Primary input for Channel 1; powers INTVCC LDO and must be ≥2.7V. |
| PGOOD1 | Open-drain status indicator | Asserts low if VOUT1 deviates >7.5% from target; requires external pull-up. |
| MODE/SYNC | Mode select & clock input | Tied to INTVCC = Burst Mode®; GND = pulse-skipping; external clock = sync + pulse-skipping. |
| PHASE | Inter-channel timing control | GND = 0° in-phase; INTVCC = 180° anti-phase or edge-controlled phase shift with external clock. |
| VIN2 | Channel 2 input supply | Independent input for Channel 2; may differ from VIN1 (e.g., separate battery or rail). |
| SW2 | Channel 2 switch node | Connects to inductor; high dv/dt node requiring tight layout and ground shielding. |
| RUN2 | Channel 2 enable control | Logic-high (>1.0V) enables Channel 2; must not float - tie to GND or INTVCC for disable/enable. |
| FB2 | Channel 2 feedback input | Senses output divider ratio; 0.6V reference enables precise VOUT = 0.6V × (1 + R2/R1). |
| INTVCC | Internal LDO output | 3.6V 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 per channel. |
| RUN1 | Channel 1 enable control | Independent logic enable for Channel 1; decouples startup sequencing between outputs. |
| SW1 | Channel 1 switch node | High-side NMOS/PMOS switch node; same layout constraints as SW2. |
| GND | Power and signal ground | Common return for all circuits; exposed pad (Pin 15) must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent buck regulators | Two fully configurable 1A outputs with separate RUN, FB, and PGOOD pins - enables asymmetric power domains and staggered startup. |
| Burst Mode® operation | 5µA total IQ at no load with both channels active - critical for multi-week battery life in handheld scanners and IoT sensors. |
| External clock synchronization | ±50% frequency lock range - eliminates beat frequencies in multi-rail systems and simplifies EMI filtering. |
| Programmable phase shift | 0° or 180° default; 90° or variable phase via external clock edge modulation - reduces input capacitor RMS current by up to 30%. |
| Integrated soft-start | 500µs ramp per channel - prevents inrush current during power-up and avoids output overshoot in sensitive analog subsystems. |
| High-efficiency dropout operation | 100% duty cycle capability with maintained regulation - sustains output during brownout conditions without shutdown. |
Applications
| Portable Handheld Scanners | Point-of-Load Supplies |
|---|---|
Use Scenario: Battery-powered barcode scanner with CMOS image sensor, microcontroller, and Bluetooth radio requiring isolated 3.3V and 1.2V rails. IC Role / Device Role / Timing Role: Dual-output DC/DC converter providing independently regulated, low-noise power domains with sequenced enable via RUN1/RUN2. Use Value: 5µA quiescent current extends single-charge runtime beyond 30 days in sleep mode; 2.25MHz switching minimizes solution size for compact handheld form factor. |
Use Scenario: FPGA or ASIC board needing tightly regulated 1.8V core and 3.3V I/O supplies from a shared 12V intermediate bus. IC Role / Device Role / Timing Role: Dual-channel synchronous buck regulator delivering high-efficiency, low-ripple power with phase-shifted operation to reduce input capacitor stress. Use Value: 180° phase shift cuts input ripple amplitude by ~70%, allowing smaller bulk capacitance and lower EMI emissions in dense PCB layouts. |
| Battery-Powered Systems | Industrial Embedded Controllers |
Use Scenario: Wireless sensor node powered by coin cell or Li-SOCl₂ battery, requiring ultra-low-power 3.0V and 2.5V outputs for RF transceiver and precision ADC. IC Role / Device Role / Timing Role: High-efficiency dual buck regulator operating in Burst Mode® to maintain regulation down to µA-level loads. Use Value: Sub-5µA no-load IQ preserves battery capacity during multi-month standby; ±1% VOUT accuracy ensures consistent sensor calibration and RF performance. |
Use Scenario: Programmable logic controller (PLC) module with isolated communication interfaces and real-time processor demanding robust, fault-tolerant 5V and 3.3V supplies. IC Role / Device Role / Timing Role: Dual-output regulator with independent PGOOD monitoring, overvoltage lockout (18.5V), and thermal-aware operation in extended temperature range. Use Value: Dual PGOOD signals enable system-level power health monitoring; 17V max input withstands industrial transients without external TVS clamping. |
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 |
|---|---|---|---|
| TPS65270PWP | 2.2MHz fixed frequency, 2A per channel, 2.95–18V input, but higher 25µA IQ and no Burst Mode®. | Higher output current capability suits higher-power processors; less suitable for µA-level battery standby. | Choose TPS65270PWP when >1A per channel or integrated power sequencing is required; avoid when ultralow IQ is critical. |
| MP2491DS-LF-Z | 1.2MHz fixed frequency, 1A per channel, 4.5–18V input, 25µA IQ, no phase control or external sync. | Lacks programmable phase shift and clock synchronization - limits EMI optimization in multi-rail systems. | Choose MP2491DS-LF-Z for cost-sensitive industrial applications where phase control and sub-10µA IQ are not required. |
Compared with TPS65270PWP and MP2491DS-LF-Z, the LTC3622EDE-2#PBF uniquely combines 2.25MHz operation, 5µA IQ, and full phase/sync control in a 3mm × 4mm DFN - making it optimal for space-constrained, battery-critical dual-rail designs where efficiency, EMI, and thermal density are co-optimized.
Availability
LTC3622EDE-2#PBF is available at Aetrix Electronics and suitable for portable handheld scanners, point-of-load supplies, and battery-powered systems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC3622EDE-2#PBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets.
The LTC3622EDE-2#PBF belongs to Analog Devices' Power by Linear™ family of high-efficiency monolithic DC/DC converters, designed specifically for space- and power-constrained applications demanding ultralow quiescent current and dual-output flexibility.
FAQ
What is the switching frequency of the LTC3622EDE-2#PBF?
The LTC3622EDE-2#PBF has a fixed 2.25MHz switching frequency with ±50% external synchronization range. This enables use of small 1µH–4.7µH inductors and ceramic capacitors, reducing solution footprint versus lower-frequency alternatives. The frequency is factory-set and cannot be adjusted via resistor or capacitor.
How does the LTC3622EDE-2#PBF achieve ultralow quiescent current?
The LTC3622EDE-2#PBF achieves 5µA no-load IQ (both channels enabled) through Burst Mode® operation, where the regulators enter deep sleep between energy bursts. During sleep, both power switches are off and bias circuitry is minimized. The LTC3622EDE-2#PBF maintains regulation while drawing less than 5µA from VIN, critical for multi-year battery life.
Can the LTC3622EDE-2#PBF operate with different input voltages on VIN1 and VIN2?
Yes - the LTC3622EDE-2#PBF supports independent inputs: VIN1 powers Channel 1 and the INTVCC LDO, while VIN2 powers Channel 2 only. They may differ (e.g., VIN1 = 12V, VIN2 = 5V), provided both remain within 2.7V–17V. This enables flexible power domain partitioning in multi-rail systems.
What is the purpose of the PHASE pin on the LTC3622EDE-2#PBF?
The PHASE pin on the LTC3622EDE-2#PBF selects inter-channel timing: tied to GND → 0° in-phase operation; tied to INTVCC → 180° anti-phase operation (reducing input ripple). With external clock applied to MODE/SYNC, PHASE = INTVCC enables edge-controlled phase shift (e.g., 90°), further optimizing EMI and thermal distribution in the LTC3622EDE-2#PBF.
Does the LTC3622EDE-2#PBF support fixed-output voltage configurations?
No - the LTC3622EDE-2#PBF is the adjustable version (VOUT = 0.6V to VIN per channel). Fixed-output variants exist (e.g., LTC3622-23/5 = 5V/3.3V), but the LTC3622EDE-2#PBF requires external resistor dividers on FB1/FB2 to set output voltage. Its feedback reference is precisely trimmed to 0.6V ±1%.
LTC3622EDE-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tube
- 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)
LTC3622EDE-2#PBF FAQ
1.How can I place an order for LTC3622EDE-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622EDE-2#PBF 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-2#PBF reliable?
The price and inventory of LTC3622EDE-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3622EDE-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC3622EDE-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622EDE-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622EDE-2#PBF?
LTC3622EDE-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622EDE-2#PBF 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-2#PBF?
For technical support, including LTC3622EDE-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622EDE-2#PBF requirements.
6.How does Aetrix verify that LTC3622EDE-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3622EDE-2#PBF 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-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC3622EDE-2#PBF?
All LTC3622EDE-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622EDE-2#PBF, 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-2#PBF part is unused and in its original packaging.
Return procedure for LTC3622EDE-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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