My Inquiry
My Account
Analog Devices Inc. LTC3622HDE-2#PBF
- Part No.:
- LTC3622HDE-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622HDE-2#PBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,077
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3622HDE-2#PBF from Analog Devices is a dual-channel, 1A synchronous step-down DC/DC regulator with 2.25MHz fixed switching frequency, ultralow 5µA no-load quiescent current (both channels enabled), and operation across 2.7V–17V input range. It delivers adjustable 0.6V–VIN outputs per channel and targets battery-powered portable systems requiring high light-load efficiency and compact power delivery.
For engineers reviewing the LTC3622HDE-2#PBF datasheet, LTC3622HDE-2#PBF pinout, LTC3622HDE-2#PBF application, or LTC3622HDE-2#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed thermal rating (–40°C to 150°C junction), and real-world selection guidance for dual-output point-of-load designs.
Technical Context
The LTC3622HDE-2#PBF implements a constant-frequency peak-current-mode control architecture with internal compensation and soft-start. Its 2.25MHz switching frequency enables use of small external inductors (e.g., 3.3µH) and ceramic capacitors while maintaining stable regulation across 0.6V–VIN output range.
It supports dual independent enable (RUN1/RUN2), programmable phase shift (0° or 180° via PHASE pin), selectable current limit (via ILIM), and external clock synchronization ±50% around 2.25MHz. Burst Mode® operation achieves 5µA IQ at no load; pulse-skipping mode minimizes output ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.25MHz fixed, synchronizable ±50% - enables <3mm × 3mm inductor footprint and reduces EMI filtering burden. |
| Input Voltage Range | 2.7V to 17V - supports single-cell Li-ion up to 4S battery stacks and industrial 12V rails. |
| Output Voltage Range | 0.6V to VIN per channel - allows generation of core voltages (e.g., 0.9V, 1.2V) and I/O rails (3.3V, 5V) from same IC. |
| No-Load Quiescent Current | 5µA (both channels enabled) - extends battery life in always-on sensor nodes and handheld scanners. |
| Output Accuracy | ±1% over temperature - ensures reliable microcontroller core voltage regulation without margining overhead. |
| Junction Temperature Range | –40°C to +150°C - qualified for under-hood automotive modules and high-ambient industrial controllers. |
| Peak Output Current | 1A per channel - sustains full load on both rails simultaneously without derating at 125°C ambient. |
Pinout & Package
Package: 14-lead (3mm × 4mm) plastic DFN with exposed pad (GND). Thermal resistance θJA = 40°C/W; requires soldered exposed pad for rated performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1 / SW2 | Channel 1 / Channel 2 switch node | Connects to respective inductor; high dv/dt node requiring tight layout and ground shielding. |
| VIN1 / VIN2 | Independent input supplies per channel | Enables dual-input systems (e.g., main + backup rail); each powers its own FET stack and INTVCC LDO. |
| FB1 / FB2 | Feedback input for channel 1 / 2 | Senses 0.6V reference; resistor divider sets VOUT = 0.6V × (1 + R2/R1); short to VOUT for fixed-output variants. |
| RUN1 / RUN2 | Enable control for channel 1 / 2 | Logic-high (>1.0V) activates regulator; must not float - tie to GND or INTVCC for permanent ON/OFF control. |
| MODE/SYNC | Burst/pulse-skip select & external clock input | Tie to INTVCC for Burst Mode (5µA IQ); tie to GND for low-ripple pulse-skipping; drive with 0.4V–INTVCC–0.3V square wave for sync. |
| PHASE | Inter-channel phase shift control | GND = 0° in-phase; INTVCC = 180° anti-phase - reduces input capacitor RMS current by ~30% in dual-output configurations. |
| ILIM | Current limit configuration | GND = 1.8A peak per channel; INTVCC = 0.9A; 1V bias = 1.8A Ch1 / 0.9A Ch2 - prevents inductor saturation during startup or overload. |
| PGOOD1 / PGOOD2 | Open-drain power-good indicators | Assert high after soft-start when VOUT within ±7.5%; delay = 32 clock cycles for fault detection - enables sequenced system power-up. |
| INTVCC | Internal 3.6V LDO output | Bypass with ≥1µF low-ESR ceramic to GND; powers gate drivers and internal logic - decouples from noisy input rails. |
| GND | Power and signal ground | Exposed pad (Pin 15) is GND - must be soldered to PCB thermal pad for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 5µA total (both channels active, no load) - enables >1-year battery life in coin-cell–powered IoT sensors. |
| 100% duty-cycle dropout operation | Maintains regulation down to VIN – VOUT < 100mV - critical for Li-ion end-of-discharge support in portable medical devices. |
| Internal soft-start | 500µs ramp per channel - prevents inrush current into downstream capacitance during hot-plug events. |
| Phase-shift programmability | 0° or 180° inter-channel offset - cuts input capacitor RMS current by half versus in-phase operation, reducing size/cost. |
| ±1% output voltage accuracy | Over –40°C to +150°C - eliminates need for post-regulation trimming in automotive ADAS camera modules. |
| External clock synchronization | ±50% capture range around 2.25MHz - allows EMI spread-spectrum alignment with system master clock in noise-sensitive RF subsystems. |
Applications
| Battery-Powered Portable Scanners | Industrial Point-of-Load Supplies |
|---|---|
Use Scenario: Handheld barcode scanner operating from single-cell Li-ion (3.0V–4.2V) with dual-rail requirement: 3.3V for MCU/I/O and 1.2V for image sensor core. IC Role / Device Role / Timing Role: Dual-output buck regulator providing tightly regulated, independently enabled power rails with minimal board area. Use Value: 5µA no-load IQ extends battery runtime beyond 8 hours; 2.25MHz switching allows 2.2µH inductors and 22µF ceramic output caps - enabling sub-1cm² power solution. |
Use Scenario: Programmable logic controller (PLC) module requiring isolated 5V and 3.3V rails from unregulated 12V–24V industrial supply. IC Role / Device Role / Timing Role: Dual synchronous buck converter delivering high-efficiency, low-noise local regulation with thermal robustness. Use Value: 150°C junction rating ensures reliability in sealed enclosures; 18.5V overvoltage lockout protects against 24V transients; anti-phase operation reduces input cap stress. |
| Automotive Camera Modules | Medical Wearable Sensors |
Use Scenario: Rear-view camera ECU powered from vehicle battery (9V–16V) needing 1.8V for image processor and 2.8V for CIS sensor interface. IC Role / Device Role / Timing Role: Dual-channel DC/DC with precise voltage accuracy and fast transient response for pixel clock stability. Use Value: ±1% VOUT accuracy maintains sensor gain linearity; 100% duty cycle operation sustains 1.8V output down to 2.0V input - critical during cold-crank conditions. |
Use Scenario: Continuous glucose monitor (CGM) using CR2032 coin cell (2.0V–3.0V) to power 1.2V analog front-end and 3.0V BLE radio. IC Role / Device Role / Timing Role: Ultra-low-IQ dual buck enabling multi-week operation from single coin cell. Use Value: 5µA no-load IQ doubles usable battery capacity vs. typical 15µA alternatives; Burst Mode® eliminates audible coil whine during sleep cycles. |
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 | Fixed 1.2MHz frequency; 3A total output (1.5A+1.5A); no Burst Mode; 25µA IQ | Higher current, lower efficiency at light loads; lacks 150°C rating and phase control | Choose for higher-output industrial PLCs where thermal headroom exceeds 125°C ambient. |
| MP2491DS-LF-Z | 2.2MHz frequency; dual 1A; 25µA IQ; no phase shift or external sync; only 125°C max junction | Lower light-load efficiency; no anti-phase capability; limited thermal envelope | Choose for cost-sensitive consumer electronics where 125°C rating suffices and EMI alignment is unnecessary. |
Compared with TPS65270PWP and MP2491DS-LF-Z, the LTC3622HDE-2#PBF uniquely combines 150°C operation, 5µA IQ, programmable phase, and external clock sync - making it the only option qualified for automotive camera modules and high-reliability industrial edge sensors requiring long-term thermal stability and ultra-low standby power.
Availability
LTC3622HDE-2#PBF is available at Aetrix Electronics and suitable for battery-powered portable scanners, industrial point-of-load supplies, and automotive camera modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3622HDE-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 automotive safety markets.
The LTC3622 product line delivers dual-output, ultralow-IQ synchronous buck regulators optimized for space-constrained, battery-sensitive applications demanding high efficiency across full load range - especially handheld, medical, and automotive systems.
FAQ
What is the maximum junction temperature rating for the LTC3622HDE-2#PBF?
The LTC3622HDE-2#PBF is rated for operation up to +150°C junction temperature, as confirmed in the Order Information table (H-grade DFN package). This exceeds standard industrial grade (125°C) and qualifies it for under-hood automotive and sealed industrial enclosure applications where ambient temperatures exceed 85°C.
Does the LTC3622HDE-2#PBF support external clock synchronization, and what is its capture range?
Yes, the LTC3622HDE-2#PBF supports external clock synchronization via the MODE/SYNC pin. Its capture range is ±50% of the nominal 2.25MHz frequency - i.e., 1.125MHz to 3.375MHz - allowing alignment with system clocks to reduce EMI peaks in noise-sensitive applications like medical imaging or RF modules.
How does the PHASE pin affect operation of the LTC3622HDE-2#PBF?
The PHASE pin on the LTC3622HDE-2#PBF selects inter-channel timing: tied to GND yields 0° in-phase switching; tied to INTVCC yields 180° anti-phase operation. Anti-phase reduces input capacitor RMS current by ~50%, lowering thermal stress and enabling smaller bulk capacitance - critical in space-constrained portable designs.
What is the quiescent current of the LTC3622HDE-2#PBF under no-load conditions?
The LTC3622HDE-2#PBF draws 5µA total quiescent current with both channels enabled and no load, as specified in the Electrical Characteristics table under "IQ Input Quiescent Current - Burst Mode Operation". This value is measured at VRUN1 = VRUN2 = 2V and MODE/SYNC = 3V, confirming its suitability for multi-year battery life in always-on IoT endpoints.
Can the LTC3622HDE-2#PBF operate in 100% duty cycle dropout mode?
Yes, the LTC3622HDE-2#PBF supports 100% duty cycle operation, enabling regulation even when input voltage approaches output voltage (e.g., 3.3V out from 3.4V in). This is explicitly stated in the FEATURES list and verified in Typical Performance Characteristic Figure G03 ("Efficiency vs Load Current at Dropout Operation"), ensuring uninterrupted power during Li-ion battery discharge termination.
LTC3622HDE-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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LTC3622HDE-2#PBF FAQ
1.How can I place an order for LTC3622HDE-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622HDE-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 LTC3622HDE-2#PBF reliable?
The price and inventory of LTC3622HDE-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 LTC3622HDE-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC3622HDE-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622HDE-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622HDE-2#PBF?
LTC3622HDE-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622HDE-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 LTC3622HDE-2#PBF?
For technical support, including LTC3622HDE-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622HDE-2#PBF requirements.
6.How does Aetrix verify that LTC3622HDE-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3622HDE-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 LTC3622HDE-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC3622HDE-2#PBF?
All LTC3622HDE-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622HDE-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 LTC3622HDE-2#PBF part is unused and in its original packaging.
Return procedure for LTC3622HDE-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3622HDE-2#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
