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Analog Devices Inc. LTC3622HDE-23/5#PBF
- Part No.:
- LTC3622HDE-23/5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622HDE-23/5#PBF.pdf
- Description:
- IC REG BUCK 3.3V/5V 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:106
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Product details
Overview
LTC3622HDE-23/5#PBF from Analog Devices is a dual-channel, 17V-input, synchronous step-down DC/DC regulator with fixed 5V and 3.3V outputs, 2.25MHz switching frequency, ultralow 5µA no-load quiescent current (both channels enabled), and operation across –40°C to +150°C junction temperature. It delivers up to 1A per channel in a compact 14-pin DFN (3mm × 4mm) package for space-constrained industrial power management.
For engineers reviewing the LTC3622HDE-23/5#PBF datasheet, LTC3622HDE-23/5#PBF pinout, LTC3622HDE-23/5#PBF application, or LTC3622HDE-23/5#PBF equivalent, key selection criteria include its dual fixed-output configuration, high-temperature grade, ±1% output accuracy, phase-shift programmability, and selectable light-load operating mode (Burst Mode® vs pulse-skipping).
Technical Context
The LTC3622HDE-23/5#PBF implements a constant-frequency, peak-current-mode control architecture with internal compensation and soft-start. Its two independent buck regulators share a common INTVCC LDO and support external synchronization over ±50% of the nominal 2.25MHz frequency.
Each channel features dedicated RUN, PGOOD, FB, SW, and ILIM pins, enabling independent enable/disable, fault reporting, current limiting, and phase control via PHASE and MODE/SYNC pins. Fixed 5V/3.3V outputs eliminate external feedback resistors, while internal 0.6V reference ensures ±1% regulation accuracy across load, line, and temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide industrial input rails including 12V and 15V systems without pre-regulation. |
| Output Voltages | Fixed 5.0V ±1% and 3.3V ±1% - eliminates feedback resistor networks and reduces BOM count and layout area. |
| Switching Frequency | 2.25MHz ±10% - enables use of small, low-profile inductors (e.g., 1–2.2µH) and ceramic capacitors for compact designs. |
| No-Load Quiescent Current | 5µA with both channels active - extends battery life in always-on or low-duty-cycle portable equipment. |
| Output Current per Channel | 1A continuous - sufficient for powering microcontrollers, sensors, FPGAs, and communication ICs in dual-rail systems. |
| Junction Temperature Range | –40°C to +150°C - qualified for under-hood automotive, industrial motor drives, and high-ambient embedded applications. |
| Output Voltage Accuracy | ±1% over line, load, and temperature - ensures reliable logic-level compliance for 3.3V/5V I/O domains. |
Pinout & Package
Package: 14-lead (3mm × 4mm) plastic DFN with exposed thermal pad (Pin 15 = GND). Requires soldering of exposed pad to PCB ground plane for rated thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Channel 1 input supply | Accepts 2.7V–17V; powers INTVCC LDO and Channel 1 power stage. |
| PGOOD1 (Pin 2) | Channel 1 power-good indicator | Open-drain output asserting high when VOUT1 is within ±7.5% of 5V; used for sequencing and fault monitoring. |
| MODE/SYNC (Pin 3) | Operating mode select & clock sync | Tie to INTVCC for Burst Mode® (max efficiency); tie to GND for pulse-skipping (low ripple); connect to external clock for synchronization. |
| PHASE (Pin 4) | Inter-channel phase control | Tie to GND for 0° (in-phase); tie to INTVCC for 180° (anti-phase) - reduces input ripple and EMI in dual-output configurations. |
| PGOOD2 (Pin 5) | Channel 2 power-good indicator | Open-drain output asserting high when VOUT2 is within ±7.5% of 3.3V; enables independent rail monitoring. |
| ILIM (Pin 6) | Current limit configuration | Tie to GND for full 1.8A peak limit; tie to INTVCC for 0.9A; bias to 1V for asymmetric limits (1.8A Ch1 / 0.9A Ch2). |
| VIN2 (Pin 7) | Channel 2 input supply | Independent 2.7V–17V input - allows dual-input architectures (e.g., primary + backup rail). |
| SW2 (Pin 8) | Channel 2 switch node | Connects to inductor; requires low-inductance layout and local ceramic bypassing to minimize EMI and voltage spikes. |
| RUN2 (Pin 9) | Channel 2 enable control | Logic-high (>1.0V) enables regulator; must not float - supports independent power sequencing. |
| FB2 (Pin 10) | Channel 2 feedback input | Internally connected to fixed 3.3V divider - short to VOUT2; no external resistors required. |
| INTVCC (Pin 11) | Internal LDO output | 3.6V ±0.15V supply for gate drivers and logic; bypass with ≥1µF low-ESR ceramic capacitor to GND. |
| FB1 (Pin 12) | Channel 1 feedback input | Internally connected to fixed 5.0V divider - short to VOUT1; eliminates external feedback network. |
| RUN1 (Pin 13) | Channel 1 enable control | Logic-high (>1.0V) enables regulator; supports independent startup timing and fault isolation. |
| SW1 (Pin 14) | Channel 1 switch node | Connects to inductor; layout symmetry with SW2 critical for balanced anti-phase operation and EMI reduction. |
| GND (Pin 15) | Power and signal ground | Exposed thermal pad - must be soldered to solid PCB ground plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed 5V/3.3V outputs | Eliminates external feedback resistors, reduces component count, and improves production yield and long-term stability. |
| Ultralow 5µA no-load IQ (both channels) | Extends battery runtime in always-on IoT sensors, remote monitors, and energy-harvesting systems. |
| 180° programmable phase shift | Reduces input capacitor RMS current by up to 30% and lowers conducted EMI in dual-buck configurations. |
| ±50% external clock synchronization | Enables noise-sensitive system-level timing alignment (e.g., with ADC sampling clocks or RF transceivers). |
| 100% duty cycle dropout operation | Maintains regulation down to VIN ≈ VOUT, extending usable input range in battery-depleted or low-voltage conditions. |
| H-grade (–40°C to +150°C) | Qualified for under-hood automotive, industrial PLCs, and high-temperature edge computing deployments. |
Applications
| Industrial Motor Control | Automotive ADAS Camera Module |
|---|---|
|
Use Scenario: Powering dual-rail image sensor (3.3V analog, 5V digital I/O) and FPGA in a thermally constrained rear-view camera housing. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing isolated, sequenced, and ripple-controlled 3.3V/5V supplies with thermal derating up to +125°C ambient. Use Value: Eliminates discrete LDOs and external feedback networks, reducing board area by >35% while meeting AEC-Q100 Grade 2 thermal requirements. |
Use Scenario: Generating clean, low-noise 3.3V and 5V rails for CMOS image sensor, ISP, and CAN transceiver in an automotive surround-view system. IC Role / Device Role / Timing Role: High-temperature dual buck converter with Burst Mode® for standby and pulse-skipping during active imaging to minimize EMI coupling into analog video paths. Use Value: Achieves <15mVpp output ripple at 1A load and supports 18.5V load-dump immunity - critical for ASIL-B functional safety compliance. |
| Portable Medical Handheld Scanner | Industrial IoT Gateway Node |
|
Use Scenario: Powering laser diode driver (5V), MCU core (3.3V), and BLE radio in a handheld barcode scanner with coin-cell or Li-ion battery. IC Role / Device Role / Timing Role: Ultra-low-IQ dual regulator enabling >12-month shelf life and fast wake-up from deep sleep via independent RUN pin control. Use Value: 5µA quiescent current extends battery life beyond 2000 hours in standby, while 2.25MHz switching minimizes inductor size for ergonomic form factor. |
Use Scenario: Providing regulated 5V (for cellular modem) and 3.3V (for MCU and sensors) in a DIN-rail mounted gateway operating continuously in factory environments. IC Role / Device Role / Timing Role: High-reliability dual buck converter with 150°C junction rating and integrated overvoltage protection against 24V rail transients. Use Value: Withstands 18.5V input surges and maintains stable output under 85°C ambient - eliminating need for external TVS or pre-regulators. |
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; adjustable outputs only; 1.2MHz fixed frequency; 12µA IQ; MSOP-16 package. | Requires external feedback resistors; lacks fixed 5V/3.3V option and 150°C rating; lower light-load efficiency. | Select if adjustable outputs and TI ecosystem compatibility are prioritized over fixed-VOUT simplicity and extended temperature range. |
| MP2491DS-LF-Z | 4.5V–18V input; dual adjustable outputs; 500kHz switching; 30µA IQ; SOIC-16 package; no phase shift or sync capability. | Higher quiescent current; no Burst Mode®; limited to 125°C; larger footprint and lower switching frequency increase solution size. | Choose for cost-sensitive industrial applications where 2.25MHz operation, ultra-low IQ, and H-grade qualification are non-critical. |
Compared with TPS65270PWP and MP2491DS-LF-Z, the LTC3622HDE-23/5#PBF uniquely combines fixed dual outputs, 2.25MHz operation, 5µA IQ, and –40°C to +150°C qualification - making it optimal for thermally demanding, space-constrained, and battery-sensitive dual-rail systems.
Availability
LTC3622HDE-23/5#PBF is available at Aetrix Electronics and suitable for industrial motor control, automotive ADAS modules, portable medical scanners, and industrial IoT gateways requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC3622HDE-23/5#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3622HDE-23/5#PBF belongs to the LTC® µModule and monolithic power regulator family, designed specifically for high-efficiency, low-quiescent-current, dual-output point-of-load conversion in thermally harsh and space-constrained applications.
FAQ
What is the guaranteed operating junction temperature range for the LTC3622HDE-23/5#PBF?
The LTC3622HDE-23/5#PBF is fully specified and guaranteed over a junction temperature range of –40°C to +150°C. This H-grade qualification enables reliable operation in under-hood automotive, industrial motor drives, and high-ambient embedded systems where standard commercial or industrial grade parts would fail.
Does the LTC3622HDE-23/5#PBF require external feedback resistors to set its output voltages?
No - the LTC3622HDE-23/5#PBF integrates precision internal resistor dividers to deliver fixed 5.0V and 3.3V outputs. The FB1 and FB2 pins are internally connected to their respective output rails, eliminating external feedback components and associated layout sensitivity or drift-related inaccuracies.
How does the MODE/SYNC pin function on the LTC3622HDE-23/5#PBF?
The MODE/SYNC pin on the LTC3622HDE-23/5#PBF serves dual roles: tying it to INTVCC enables Burst Mode® operation for ultralow IQ, grounding it selects pulse-skipping mode for minimal output ripple, and connecting it to an external clock synchronizes both channels to that clock while forcing pulse-skipping mode.
Can the LTC3622HDE-23/5#PBF operate with different input voltages on VIN1 and VIN2?
Yes - VIN1 and VIN2 are electrically independent inputs, each supporting 2.7V to 17V. This allows the LTC3622HDE-23/5#PBF to be used in dual-input architectures, such as primary + backup supply, or separate noisy/dirty and clean input rails for improved noise isolation between the two output channels.
What is the purpose of the PHASE pin on the LTC3622HDE-23/5#PBF?
The PHASE pin on the LTC3622HDE-23/5#PBF controls inter-channel timing: grounding it sets 0° (in-phase) operation, while tying it to INTVCC configures 180° (anti-phase) switching. Anti-phase operation reduces input capacitor RMS current and system-level conducted EMI - especially beneficial in compact, high-density power designs.
LTC3622HDE-23/5#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:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 3.3V, 5V
- Voltage - Output (Max):
- -
- 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-23/5#PBF FAQ
1.How can I place an order for LTC3622HDE-23/5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622HDE-23/5#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 LTC3622HDE-23/5#PBF reliable?
The price and inventory of LTC3622HDE-23/5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3622HDE-23/5#PBF is usually 5 days.
3.What payment methods are accepted for LTC3622HDE-23/5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622HDE-23/5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622HDE-23/5#PBF?
LTC3622HDE-23/5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622HDE-23/5#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 LTC3622HDE-23/5#PBF?
For technical support, including LTC3622HDE-23/5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622HDE-23/5#PBF requirements.
6.How does Aetrix verify that LTC3622HDE-23/5#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3622HDE-23/5#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 LTC3622HDE-23/5#PBF meets industry standards.
7.What is the process for return or replacement of LTC3622HDE-23/5#PBF?
All LTC3622HDE-23/5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622HDE-23/5#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 LTC3622HDE-23/5#PBF part is unused and in its original packaging.
Return procedure for LTC3622HDE-23/5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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