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Analog Devices Inc. LTC3622EDE#PBF
- Part No.:
- LTC3622EDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622EDE#PBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:335
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Product details
Overview
LTC3622EDE#PBF from Analog Devices is a dual-channel, 1A synchronous step-down regulator with fixed 1MHz switching frequency, ultralow 5µA no-load quiescent current (both channels enabled), ±1% output voltage accuracy, and operation from 2.7V to 17V input. It delivers adjustable 0.6V–VIN outputs per channel and supports phase-shifted operation for reduced input ripple in battery-powered portable scanners and point-of-load systems.
For engineers reviewing the LTC3622EDE#PBF datasheet, LTC3622EDE#PBF pinout, LTC3622EDE#PBF application, or LTC3622EDE#PBF equivalent, key selection criteria include its dual 1A capability with independent RUN control, Burst Mode® vs pulse-skipping mode selection via MODE/SYNC, programmable current limit via ILIM, and 14-pin 3mm × 4mm DFN package with exposed thermal pad.
Technical Context
The LTC3622EDE#PBF 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 indicators (PGOOD1/PGOOD2), enabling asymmetric output configurations and staggered startup sequencing.
It integrates dual N-channel and P-channel MOSFETs with RDS(ON) of 0.15Ω (NMOS) and 0.37Ω (PMOS) at 5V input, supports external clock synchronization ±50% around 1MHz, and provides 0° or 180° phase shift selection via PHASE pin-critical for minimizing input capacitor RMS current in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and automotive battery rails without pre-regulation. |
| Output Voltage Range | 0.6V to VIN - enables direct generation of core voltages down to sub-1V for modern SoCs and FPGAs. |
| Max Output Current | 1A per channel - sufficient for powering dual-core processors or sensor + MCU subsystems. |
| Quiescent Current | 5µA (both channels active, no load) - extends battery life in always-on portable devices. |
| Switching Frequency | 1MHz (fixed) - balances efficiency, size, and EMI; allows use of compact 4.7µH inductors. |
| Output Accuracy | ±1% over temperature and line/load - ensures stable regulation for precision analog circuitry. |
| Package | 14-pin DFN (3mm × 4mm, exposed pad) - provides low thermal resistance (θJA = 40°C/W) for high-power density layouts. |
Pinout & Package
14-pin plastic DFN (3mm × 4mm) with exposed thermal pad (Pin 15 = GND). Requires soldering of exposed pad to PCB ground plane for rated thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Channel 1 input supply | Also powers INTVCC LDO; must be ≥2.7V for regulation. |
| PGOOD1 | Open-drain status indicator | Pulls low if VOUT1 deviates >7.5% from target; requires external pull-up. |
| MODE/SYNC | Mode select & sync input | Tie to INTVCC for Burst Mode® (max efficiency); tie to GND for pulse-skipping (low ripple). |
| PHASE | Inter-channel phase control | Tie to GND for 0° (in-phase); tie to INTVCC for 180° (anti-phase) to reduce input ripple. |
| VIN2 | Channel 2 input supply | Independent of VIN1 - supports dual-input systems like USB + battery. |
| SW2 | Channel 2 switch node | Connects to inductor; high dv/dt node requiring careful layout and ground shielding. |
| RUN2 | Channel 2 enable input | Logic-high (>1.0V) activates regulator; do not leave floating. |
| FB2 | Channel 2 feedback input | Senses resistor divider tap; sets VOUT2 = 0.6V × (1 + R2/R1). |
| INTVCC | Internal LDO output | 3.6V regulated supply; bypass with ≥1µF low-ESR capacitor to GND. |
| FB1 | Channel 1 feedback input | Identical function to FB2; enables independent output programming. |
| RUN1 | Channel 1 enable input | Independent control allows sequenced power-up of dual-rail systems. |
| SW1 | Channel 1 switch node | Same layout constraints as SW2; critical for EMI and efficiency. |
| GND | Power and signal ground | Exposed pad (Pin 15) must be soldered to PCB ground for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces no-load IQ to 5µA while maintaining regulation - essential for long-duration battery operation. |
| Programmable current limit | ILIM pin selects full (1.8A) or half (0.9A) peak current per channel - prevents inductor saturation under fault conditions. |
| Phase-shifted dual outputs | 0° or 180° inter-channel timing reduces input capacitor RMS current by up to 30% versus in-phase operation. |
| 100% duty cycle dropout mode | Maintains regulation down to VIN ≈ VOUT with minimal IQ increase - extends usable battery range. |
| Integrated soft-start | 500µs ramp per channel prevents inrush current and output overshoot during power-up. |
Applications
| Battery-Powered Handheld Scanners | Point-of-Load Dual-Rail Systems |
|---|---|
Use Scenario: Portable barcode scanner powered by single-cell Li-ion (3.0V–4.2V) requiring separate 3.3V logic and 1.8V sensor rails. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing independently enabled, phase-shifted 3.3V/1.8V outputs with Burst Mode® for standby. Use Value: 5µA quiescent current extends battery life beyond 100 hours in sleep mode; 1MHz switching enables compact 2.2µH inductors. |
Use Scenario: Industrial IoT edge node with microcontroller (3.3V), RF transceiver (2.5V), and analog front-end (1.2V) on shared PCB. IC Role / Device Role / Timing Role: Dual adjustable buck converter delivering precise, low-noise 3.3V and 2.5V rails with independent RUN control for power sequencing. Use Value: ±1% output accuracy ensures reliable ADC reference and RF PLL lock; 180° phase shift cuts input ripple by 40%, reducing bulk capacitance. |
| Portable Medical Sensors | Automotive Body Control Modules |
Use Scenario: Wearable ECG monitor using coin-cell battery (2.7V–3.6V) powering ultra-low-power MCU and analog signal chain. IC Role / Device Role / Timing Role: Dual buck regulator generating 1.8V for digital core and 3.0V for analog front-end, both optimized for light-load efficiency. Use Value: 4µA IQ with one channel enabled preserves battery capacity during sensor sampling intervals; internal compensation eliminates external compensation parts. |
Use Scenario: Automotive interior lighting module with 12V battery input requiring isolated 5V MCU rail and 3.3V CAN transceiver rail. IC Role / Device Role / Timing Role: Dual buck converter operating from 12V nominal (6V–16V transient) with integrated OVP (18.5V) and UVLO (2.5V). Use Value: VIN overvoltage protection prevents damage during load-dump events; 17V absolute max rating withstands automotive transients. |
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, 2.95V–18V input, no Burst Mode®, higher IQ (25µA) | Higher current, faster switching - better for space-constrained designs needing smaller inductors | Select when >1A per channel or <500ns minimum on-time required; avoid if ultra-low IQ is critical. |
| MAX20004AATP+T | 2.2MHz, 1A per channel, 3.5V–36V input, integrated PMIC sequencing, 15µA IQ, no phase-shift control | Wider VIN, automotive AEC-Q100 qualified - suited for harsh-environment body electronics | Choose for automotive-grade reliability and extended input range; not suitable for sub-3V battery operation. |
Compared with TPS65270PWP and MAX20004AATP+T, the LTC3622EDE#PBF uniquely combines 1MHz operation, 5µA IQ, and programmable phase shift - making it optimal for portable, battery-sensitive dual-rail systems where input ripple and standby power dominate design constraints.
Availability
LTC3622EDE#PBF is available at Aetrix Electronics and suitable for battery-powered handheld scanners, point-of-load dual-rail systems, and portable medical sensors requiring stable component supply across production lifecycles.
Supply support for LTC3622EDE#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 industrial, automotive, communications, and healthcare markets since 1965.
The LTC3622EDE#PBF belongs to Analog Devices' Power by Linear™ family of high-efficiency DC/DC regulators, designed specifically for ultra-low-power, dual-output applications in portable and energy-constrained systems.
FAQ
What is the switching frequency of the LTC3622EDE#PBF?
The LTC3622EDE#PBF operates at a fixed 1MHz switching frequency. This value is factory-set and cannot be adjusted via external components. The part supports external clock synchronization within ±50% of 1MHz (i.e., 500kHz to 1.5MHz), but only when MODE/SYNC is driven by an external signal - not when used for Burst Mode® or pulse-skipping selection. The LTC3622EDE#PBF datasheet confirms this frequency is guaranteed over –40°C to 125°C junction temperature.
Does the LTC3622EDE#PBF support adjustable output voltages?
Yes, the LTC3622EDE#PBF supports fully adjustable output voltages from 0.6V to VIN on both channels via external resistor dividers connected to FB1 and FB2 pins. The feedback reference is 0.6V with ±1% accuracy. Fixed-output variants (e.g., LTC3622-23/5) exist, but the LTC3622EDE#PBF is the adjustable version - confirmed by its part number suffix and the "Adjustable" entry in the Order Information table for LTC3622 (not -2 or -23/5).
How does the MODE/SYNC pin function on the LTC3622EDE#PBF?
The MODE/SYNC pin on the LTC3622EDE#PBF serves two distinct functions: (1) selecting operating mode - tie to INTVCC for Burst Mode® (ultralow IQ), tie to GND for pulse-skipping (low ripple); and (2) accepting external clock input for synchronization - when driven by a square wave, it forces pulse-skipping mode and locks switching frequency to the external source. These behaviors are mutually exclusive and defined in the Pin Functions section of the LTC3622EDE#PBF datasheet.
What is the thermal pad requirement for the LTC3622EDE#PBF?
The LTC3622EDE#PBF uses a 14-pin DFN package with an exposed thermal pad (Pin 15) that must be soldered directly to the PCB ground plane. This pad is electrically and thermally connected to GND. Failure to solder it results in degraded thermal performance (θJA increases significantly) and potential reliability issues. The datasheet explicitly states "EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB" - a non-negotiable layout requirement for the LTC3622EDE#PBF.
Can the LTC3622EDE#PBF operate with only one channel enabled?
Yes, the LTC3622EDE#PBF supports independent channel control via RUN1 and RUN2 pins. When only one channel is enabled (e.g., RUN1 = high, RUN2 = low), quiescent current drops to <4µA - lower than the 5µA specified for both channels active. This feature is explicitly documented in the Electrical Characteristics table under "IQ Input Quiescent Current" and enables dynamic power scaling in systems where rail demand varies over time.
LTC3622EDE#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)
LTC3622EDE#PBF FAQ
1.How can I place an order for LTC3622EDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622EDE#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#PBF reliable?
The price and inventory of LTC3622EDE#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#PBF is usually 5 days.
3.What payment methods are accepted for LTC3622EDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622EDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622EDE#PBF?
LTC3622EDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622EDE#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#PBF?
For technical support, including LTC3622EDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622EDE#PBF requirements.
6.How does Aetrix verify that LTC3622EDE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3622EDE#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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3622EDE#PBF?
All LTC3622EDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622EDE#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#PBF part is unused and in its original packaging.
Return procedure for LTC3622EDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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