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Analog Devices Inc. LTC3622HDE#TRPBF
- Part No.:
- LTC3622HDE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622HDE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,813
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Product details
Overview
LTC3622HDE#TRPBF from Analog Devices is a dual-channel, 1A synchronous step-down DC/DC regulator with ultralow quiescent current (5µA with both channels enabled), fixed 1MHz switching frequency, and input voltage range of 2.7V to 17V. It delivers adjustable output voltages from 0.6V to VIN per channel and supports phase-shifted operation for reduced input ripple - used in battery-powered portable scanners and point-of-load power supplies.
For engineers reviewing the LTC3622HDE#TRPBF datasheet, LTC3622HDE#TRPBF pinout, LTC3622HDE#TRPBF application, or LTC3622HDE#TRPBF equivalent, key selection criteria include its dual 1A output capability, ±1% output voltage accuracy, Burst Mode® vs pulse-skipping mode trade-off, 14-pin DFN (3mm × 4mm) thermal performance at 150°C junction temperature, and programmable current limit via ILIM pin.
Technical Context
The LTC3622HDE#TRPBF employs peak current-mode control with internal compensation and soft-start (500µs), enabling stable transient response across wide load and line variations. Its dual independent regulators share a common INTVCC LDO but operate with separate RUN, FB, PGOOD, and SW pins - supporting asynchronous or synchronized (±50% range) operation via MODE/SYNC pin.
Phase alignment is configurable via PHASE pin (0° or 180°) or externally modulated clock edges, while ILIM pin enables per-channel current limit scaling (full or halved). The device integrates NMOS/PMOS power switches with RDS(ON) of 150mΩ (NMOS) and 370mΩ (PMOS) at VIN = 5V, and features integrated overvoltage (18.5V) and undervoltage (2.5V) protection on VIN1/VIN2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and battery systems including 12V rails and Li-ion stacks. |
| Output Voltage Range | 0.6V to VIN per channel - enables direct regulation down to core logic voltages without external LDO post-regulation. |
| Max Output Current | 1A per channel - sufficient for powering microcontrollers, sensors, and RF modules in compact portable designs. |
| Quiescent Current | 5µA (both channels active, no load) - extends battery life in always-on, low-duty-cycle applications like handheld scanners. |
| Switching Frequency | 1MHz (fixed) - balances efficiency, component size (small inductors), and EMI profile for space-constrained PCBs. |
| Output Accuracy | ±1% over temperature and line/load - ensures reliable voltage margining for sensitive analog and digital loads. |
| Junction Temp Range | –40°C to +150°C - qualified for high-ambient automotive under-hood or industrial edge computing environments. |
Pinout & Package
Package: 14-lead (3mm × 4mm) plastic DFN with exposed pad (Pin 15 = GND), rated for θJA = 40°C/W and θJC = 4.4°C/W. Exposed pad must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Channel 1 input supply | Primary input for regulator 1; powers INTVCC LDO and supports up to 17V. |
| PGOOD1 | Open-drain power-good indicator | Asserts high after soft-start and regulation; pulls low if VOUT1 deviates >7.5% from target. |
| MODE/SYNC | Mode select & external clock input | Tied to INTVCC = Burst Mode® (low IQ); tied to GND = pulse-skipping (low ripple); driven by external clock = synchronization + phase control. |
| PHASE | Inter-channel phase configuration | GND = 0° in-phase; INTVCC = 180° anti-phase; enables ripple cancellation in shared input bus designs. |
| ILIM | Current limit programming | GND = full 1.8A peak limit; INTVCC = 0.9A; floating = asymmetric limit (1.8A ch1 / 0.9A ch2). |
| VIN2 | Channel 2 input supply | Independent input rail - allows dual-input systems (e.g., primary + backup battery). |
| SW2 | Channel 2 switch node | Connects to inductor; requires low-inductance layout to minimize EMI and switching losses. |
| RUN2 | Channel 2 enable control | Logic-high activates regulator 2; must not float - use pull-down resistor if unused. |
| FB2 | Channel 2 feedback input | Senses output divider; internal 0.6V reference enables VOUT = 0.6V × (1 + R2/R1). |
| INTVCC | Internal LDO output | 3.6V regulated supply for gate drivers and logic; bypass with ≥1µF low-ESR ceramic capacitor. |
| FB1 | Channel 1 feedback input | Identical function to FB2; supports independent output programming per channel. |
| RUN1 | Channel 1 enable control | Independent enable for regulator 1 - enables staggered startup or dynamic power sequencing. |
| SW1 | Channel 1 switch node | High dv/dt node; requires tight loop area with input cap and inductor to reduce radiated noise. |
| GND | Power and signal ground | Exposes thermal pad (Pin 15); must be solidly connected to PCB ground plane for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces no-load IQ to 5µA (both channels) - critical for multi-week battery life in intermittent-scan devices. |
| Programmable phase shift | 0° or 180° inter-channel alignment via PHASE pin - cuts input capacitor RMS current by up to 30% in dual-output systems. |
| Integrated soft-start | 500µs controlled ramp per channel - prevents inrush current and output overshoot during power-up or wake-up events. |
| External frequency sync | ±50% capture range around 1MHz - enables EMI reduction via spread-spectrum clocking or system-level timing coordination. |
| 100% duty cycle dropout | Maintains regulation down to VIN ≈ VOUT with minimal IQ increase - extends usable battery voltage range in Li-ion applications. |
| Overvoltage lockout | 18.5V trip threshold with 300mV hysteresis - protects internal MOSFETs from transients without external TVS diodes. |
Applications
| Handheld Barcode Scanners | Industrial IoT Edge Nodes |
|---|---|
Use Scenario: Battery-powered scanner operating intermittently with 100ms active bursts and 5s sleep cycles. IC Role / Device Role / Timing Role: Dual-output regulator supplying 3.3V to CMOS image sensor and 1.8V to ARM Cortex-M4 MCU. Use Value: 5µA quiescent current extends 2000mAh Li-Po battery life from 3 days to >14 days in standby; 1MHz switching allows <2.2µH inductors for compact form factor. |
Use Scenario: DIN-rail mounted sensor node with isolated RS-485, LoRaWAN radio, and multi-sensor fusion (temp/humidity/accelerometer). IC Role / Device Role / Timing Role: Primary point-of-load converter deriving 5V (radio) and 3.3V (MCU/sensors) from 12–24V DC input. Use Value: 18V max input withstands 24V system surges; 150°C junction rating ensures reliability in unventilated enclosures; phase-shifted outputs reduce bulk input capacitance by 40%. |
| Portable Medical Diagnostic Tools | Automotive Infotainment Subsystems |
Use Scenario: Hand-carried ultrasound probe requiring low-noise analog supply and fast wake-from-sleep response. IC Role / Device Role / Timing Role: Dual regulator delivering 2.5V (ADC reference) and 1.2V (FPGA core) with independent RUN control. Use Value: Pulse-skipping mode (via grounded MODE/SYNC) achieves <10mVpp output ripple at 10mA load - meets medical-grade analog noise specs without added LDO filtering. |
Use Scenario: In-dash display module powered from vehicle battery (9–16V) with CAN FD interface and touch controller. IC Role / Device Role / Timing Role: Main power IC generating 5V (USB host) and 3.3V (SoC I/O) with cold-crank support down to 6V. Use Value: 2.7V min input and 100% duty cycle operation sustain regulation during engine cranking; PGOOD flags ensure safe firmware boot sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270RGET | 2.2MHz fixed frequency, 3A total output (1.5A+1.5A), no Burst Mode®, higher IQ (25µA) | Higher current, faster switching - better for compact high-power apps; lacks ultralow-IQ sleep mode | Select when >1A/channel needed or 2.2MHz EMI profile preferred; avoid where battery life is critical. |
| MP2491DS-LF-Z | Single 2A output, 2.2MHz, no dual-channel architecture, no phase control, IQ = 20µA | Requires two ICs for dual outputs - increases BOM count and board area; no inter-channel coordination | Use only if single-rail design suffices or cost-per-amp dominates; not a functional replacement for dual-output requirement. |
Compared with TPS65270RGET and MP2491DS-LF-Z, the LTC3622HDE#TRPBF uniquely combines dual 1A outputs, 5µA quiescent current, 1MHz switching, and programmable phase - making it optimal for space- and energy-constrained portable electronics where coordinated dual-rail power delivery is essential.
Availability
LTC3622HDE#TRPBF is available at Aetrix Electronics and suitable for handheld scanners, industrial IoT edge nodes, and portable medical diagnostic tools requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3622HDE#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 healthcare markets.
The LTC3622HDE#TRPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency monolithic DC/DC regulators, designed specifically for battery-powered and thermally constrained applications demanding ultralow quiescent current and robust dual-rail power delivery.
FAQ
What is the maximum junction temperature rating for the LTC3622HDE#TRPBF?
The LTC3622HDE#TRPBF is specified for operation from –40°C to +150°C junction temperature. This H-grade qualification makes it suitable for under-hood automotive, industrial control cabinets, and sealed portable equipment where ambient temperatures exceed 125°C. Thermal derating above 125°C is recommended to maintain long-term reliability.
How does the MODE/SYNC pin affect efficiency and ripple in the LTC3622HDE#TRPBF?
In the LTC3622HDE#TRPBF, tying MODE/SYNC to INTVCC enables Burst Mode® operation - achieving 5µA quiescent current but increasing output ripple. Grounding MODE/SYNC selects pulse-skipping mode, reducing ripple to <10mVpp at light loads while raising IQ to ~10µA. External clock synchronization forces pulse-skipping mode regardless of DC bias.
Can the LTC3622HDE#TRPBF operate with different input voltages on VIN1 and VIN2?
Yes - the LTC3622HDE#TRPBF supports independent input rails: VIN1 powers Channel 1 and the INTVCC LDO, while VIN2 powers Channel 2. This enables flexible power architectures such as primary battery + backup supercapacitor, or split-rail industrial inputs. Both inputs accept 2.7V to 17V, and internal OVLO monitors each pin separately.
What is the purpose of the PHASE pin on the LTC3622HDE#TRPBF?
The PHASE pin on the LTC3622HDE#TRPBF configures inter-channel timing: grounding it sets 0° phase alignment (in-phase switching), while connecting it to INTVCC enables 180° anti-phase operation. Anti-phase reduces input capacitor RMS current and input voltage ripple - especially beneficial in dual-output systems sharing a common input source.
Does the LTC3622HDE#TRPBF support fixed-output voltage variants?
No - the LTC3622HDE#TRPBF is the adjustable-output version (LTC3622 family base part). Fixed-output variants include LTC3622-23/5 (3.3V/5V) and LTC3622-2 (2.25MHz adjustable). All share identical pinout and package, but fixed versions omit external feedback resistors and tie FB1/FB2 directly to their respective VOUT pins.
LTC3622HDE#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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LTC3622HDE#TRPBF FAQ
1.How can I place an order for LTC3622HDE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622HDE#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#TRPBF reliable?
The price and inventory of LTC3622HDE#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3622HDE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622HDE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622HDE#TRPBF?
LTC3622HDE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622HDE#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#TRPBF?
For technical support, including LTC3622HDE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622HDE#TRPBF requirements.
6.How does Aetrix verify that LTC3622HDE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3622HDE#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3622HDE#TRPBF?
All LTC3622HDE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622HDE#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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3622HDE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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