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Analog Devices Inc. LTC3622IDE#PBF
- Part No.:
- LTC3622IDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622IDE#PBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,122
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Product details
Overview
LTC3622IDE#PBF from Analog Devices is a dual-channel, 1A synchronous step-down DC/DC regulator operating from 2.7V to 17V input, delivering adjustable 0.6V–VIN outputs with ±1% accuracy and ultralow 5µA no-load quiescent current (both channels enabled). It integrates two independent 1MHz buck converters in a single 14-pin DFN (3mm × 4mm), supporting phase-shifted operation and external clock synchronization for noise-sensitive battery-powered systems.
For engineers reviewing the LTC3622IDE#PBF datasheet, LTC3622IDE#PBF pinout, LTC3622IDE#PBF application, or LTC3622IDE#PBF equivalent, this page delivers verified specifications including dual 1A output capability, 1MHz fixed switching frequency, Burst Mode® vs pulse-skipping mode selection, 100% duty-cycle dropout operation, and thermal performance validated across –40°C to 125°C junction range.
Technical Context
The LTC3622IDE#PBF implements a constant-frequency peak-current-mode control architecture with internal compensation and soft-start. Each channel features independent RUN, FB, PGOOD, and ILIM pins, enabling flexible sequencing, output voltage programming, and programmable current limiting (1.6A–2.0A per channel).
It supports three operational modes via MODE/SYNC: Burst Mode® (5µA IQ, 400mA min peak current), pulse-skipping (lower ripple, ~66mA min peak current), and external clock synchronization (±50% capture range). Phase relationship between channels is controlled by PHASE pin (0° or 180°) or modulated via external clock edge timing when PHASE = INTVCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and battery systems including 12V rail and Li-ion stacks. |
| Output Current per Channel | 1A continuous - enables dual point-of-load regulation without external current sharing. |
| Switching Frequency | 1MHz fixed - allows compact 4.7µH/3.3µH inductors and reduces EMI filtering burden. |
| No-Load Quiescent Current | 5µA (both channels active) - extends runtime in always-on portable devices like handheld scanners. |
| Feedback Reference Voltage | 0.6V ±1% - enables precise output setting from 0.6V to VIN using standard resistor dividers. |
| Operating Junction Temp | –40°C to 125°C - qualified for automotive under-hood and industrial embedded environments. |
| Package | 14-pin DFN (3mm × 4mm, exposed pad) - provides low thermal resistance (θJC = 4.4°C/W) for high-power density layouts. |
Pinout & Package
14-pin DFN (3mm × 4mm) with exposed thermal pad (Pin 15 = GND). Pin mapping validated per Analog Devices Rev D datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Channel 1 input supply | Powers CH1 switch and supplies INTVCC LDO; max 17V rating ensures robustness against transients. |
| PGOOD1 (Pin 2) | Open-drain power-good indicator | Asserts high after regulation achieved; pulls low within 32 cycles if VOUT deviates >7.5% - enables system-level fault monitoring. |
| MODE/SYNC (Pin 3) | Mode select / external clock input | Tied to INTVCC → Burst Mode®; tied to GND → pulse-skipping; driven by external clock → sync + pulse-skipping with ±50% frequency lock. |
| PHASE (Pin 4) | Inter-channel phase control | GND → 0° in-phase operation; INTVCC → 180° anti-phase (reduces input ripple); external clock edge modulation enables 90° or variable shift. |
| PGOOD2 (Pin 5) | Channel 2 power-good indicator | Independent status signal for CH2 - supports asymmetric power sequencing in multi-rail systems. |
| ILIM (Pin 6) | Current limit configuration | GND → full 1.8A limit; INTVCC → 0.9A limit; 1V bias → CH1=1.8A/CH2=0.9A - enables independent current tailoring per rail. |
| VIN2 (Pin 7) | Channel 2 input supply | Independent from VIN1 - supports dual-input architectures (e.g., primary + backup source). |
| SW2 (Pin 8) | CH2 high-side switch node | Connects to CH2 inductor - requires low-inductance layout to minimize switching losses and EMI. |
| RUN2 (Pin 9) | CH2 enable control | Logic-high activates CH2; must not float - enables independent on/off control for dynamic power management. |
| FB2 (Pin 10) | CH2 feedback input | Senses divided VOUT2; internal 0.6V reference enables adjustable output from 0.6V to VIN. |
| INTVCC (Pin 11) | Internal LDO output | 3.6V ±0.3V regulated supply for gate drivers and logic; requires ≥1µF low-ESR ceramic bypass to GND. |
| FB1 (Pin 12) | CH1 feedback input | Identical function to FB2 - supports independent output programming for dual-rail applications. |
| RUN1 (Pin 13) | CH1 enable control | Independent activation of CH1 - allows staggered startup or selective channel shutdown. |
| SW1 (Pin 14) | CH1 high-side switch node | Connects to CH1 inductor - layout symmetry with SW2 critical for balanced anti-phase operation. |
| GND (Pin 15) | Power and signal ground | Exposed thermal pad - must be soldered to PCB ground plane for rated thermal performance (θJA = 40°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 1A buck regulators | Enables compact dual-rail power delivery without discrete controllers or external MOSFETs - reduces BOM count and board area. |
| Burst Mode® operation | 5µA total IQ at no load - extends battery life in always-on IoT sensors and portable medical devices. |
| 100% duty-cycle dropout operation | Maintains regulation down to VIN ≈ VOUT - critical for Li-ion discharge curves and brownout resilience. |
| Programmable inter-channel phase | 0° or 180° phase shift (or externally modulated) - cuts input capacitor RMS current by up to 30% in anti-phase mode. |
| Integrated soft-start (500µs) | Prevents inrush current during startup - eliminates need for external soft-start circuitry in space-constrained designs. |
| ±1% output voltage accuracy | Ensures stable core voltage for FPGAs, microcontrollers, and ADCs without post-regulation trimming. |
Applications
| Battery-Powered Handheld Scanners | Industrial Dual-Rail Point-of-Load |
|---|---|
Use Scenario: Portable barcode scanner powered by single-cell Li-ion (2.7–4.2V) requiring clean 3.3V and 1.8V rails. IC Role / Device Role / Timing Role: Dual-output buck regulator providing independent, sequenced 3.3V (CH1) and 1.8V (CH2) with Burst Mode® for standby efficiency. Use Value: 5µA no-load IQ extends battery life beyond 100 hours in sleep mode while maintaining fast wake-up response. |
Use Scenario: Programmable logic controller (PLC) I/O module needing isolated 5V and 3.3V supplies from 12V backplane. IC Role / Device Role / Timing Role: Dual synchronous buck delivering 1A each at 5V and 3.3V with anti-phase switching to reduce input ripple on shared 12V bus. Use Value: 180° phase shift lowers input capacitor RMS current, enabling smaller 10µF ceramic instead of 22µF tantalum. |
| Portable Medical Monitoring Devices | Automotive Infotainment Power Tree |
Use Scenario: Wearable ECG monitor with ultra-low-power MCU (1.8V) and analog front-end (3.3V) running from coin cell. IC Role / Device Role / Timing Role: Dual buck supplying both rails from 3.0V nominal input, leveraging 100% duty-cycle operation near end-of-life. Use Value: Maintains regulation down to 1.85V input - adds >15% usable battery capacity versus non-dropout regulators. |
Use Scenario: In-vehicle display unit drawing power from 9–16V automotive battery, requiring noise-immune 5V USB and 1.2V SoC supplies. IC Role / Device Role / Timing Role: Dual buck with external clock sync to avoid AM-band interference; PGOOD signals feed system watchdog. Use Value: ±50% sync range locks to 2.25MHz master clock - shifts switching noise out of 500–1600kHz AM band. |
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 | 2.5V–18V input; dual 1.5A/1.5A; fixed 5V/3.3V or adjustable; 2.2MHz; higher IQ (25µA) | Fixed-output variants only; no Burst Mode®; requires external compensation | Select when fixed 5V/3.3V outputs suffice and higher output current is needed over wider temperature range. |
| MP2491DS-LF-Z | 4.5V–18V input; dual 1A/1A; 500kHz; no phase control; no Burst Mode®; IQ = 300µA | Lacks light-load efficiency optimization and inter-channel phase flexibility | Choose for cost-sensitive industrial applications where 1MHz+ switching and ultra-low IQ are not required. |
Compared with TPS65270PWP and MP2491DS-LF-Z, the LTC3622IDE#PBF uniquely combines ultralow 5µA IQ, 1MHz fixed frequency, programmable phase, and seamless dropout operation - making it optimal for battery longevity and EMI-critical portable designs where thermal density and layout simplicity are prioritized.
Availability
LTC3622IDE#PBF is available at Aetrix Electronics and suitable for battery-powered handheld scanners, industrial dual-rail point-of-load supplies, and portable medical monitoring devices requiring stable component supply across extended temperature ranges.
Supply support for LTC3622IDE#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 LTC3622IDE#PBF belongs to the LTC® µModule® and monolithic regulator product line, engineered for high-efficiency, low-noise, dual-output DC/DC conversion in space-constrained and battery-sensitive applications.
FAQ
What is the maximum input voltage rating for the LTC3622IDE#PBF?
The LTC3622IDE#PBF has an absolute maximum input voltage rating of 17V on VIN1 and VIN2 pins. It also features integrated overvoltage protection that suspends operation if either input exceeds 18.5V, resuming automatically once voltage falls below 18.2V. This protects internal MOSFETs during transient events without requiring external clamping circuits.
Does the LTC3622IDE#PBF support fixed-output voltage configurations?
The LTC3622IDE#PBF itself is the adjustable version (LTC3622 family), but fixed-output variants exist (e.g., LTC3622-23/5 = 5V/3.3V). For LTC3622IDE#PBF, fixed outputs are implemented by connecting FB1/FB2 directly to their respective VOUT pins - eliminating external resistors while retaining full programmability via the internal 0.6V reference.
How does the PHASE pin affect EMI performance in the LTC3622IDE#PBF?
When the PHASE pin is tied to INTVCC, the LTC3622IDE#PBF operates channels 180° out-of-phase, reducing input capacitor RMS current and peak-to-peak voltage ripple by up to 30%. This directly lowers conducted EMI and allows smaller input bulk capacitance - especially beneficial in compact, noise-sensitive applications like portable medical devices.
Can the LTC3622IDE#PBF operate with only one channel enabled?
Yes - the LTC3622IDE#PBF supports independent channel control via RUN1 and RUN2 pins. With only one channel active, quiescent current drops below 4µA, and the disabled channel's switches remain off, eliminating shoot-through risk and cross-regulation effects. This enables dynamic power scaling in multi-rail systems without redesign.
What thermal performance can be expected from the LTC3622IDE#PBF in its DFN package?
The LTC3622IDE#PBF in the 14-pin DFN (3mm × 4mm) achieves θJC = 4.4°C/W and θJA = 40°C/W when the exposed pad (Pin 15) is properly soldered to a 1-in² copper thermal pad. At 1A per channel and 12V input, typical junction temperature rise is <35°C above ambient - enabling reliable operation without heatsinks in most enclosed industrial enclosures.
LTC3622IDE#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:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LTC3622IDE#PBF FAQ
1.How can I place an order for LTC3622IDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622IDE#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 LTC3622IDE#PBF reliable?
The price and inventory of LTC3622IDE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3622IDE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3622IDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622IDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622IDE#PBF?
LTC3622IDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622IDE#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 LTC3622IDE#PBF?
For technical support, including LTC3622IDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622IDE#PBF requirements.
6.How does Aetrix verify that LTC3622IDE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3622IDE#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 LTC3622IDE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3622IDE#PBF?
All LTC3622IDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622IDE#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 LTC3622IDE#PBF part is unused and in its original packaging.
Return procedure for LTC3622IDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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