My Inquiry
My Account
Analog Devices Inc. LTC3622HDE#PBF
- Part No.:
- LTC3622HDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622HDE#PBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,236
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3622HDE#PBF from Analog Devices is a dual-channel, 1A synchronous step-down DC/DC regulator with ultralow 5µA no-load quiescent current (both channels enabled), fixed 1MHz switching frequency, and operation across 2.7V–17V input range. It delivers adjustable 0.6V–VIN outputs per channel and supports phase-shifted operation for reduced input ripple-used in battery-powered handheld scanners requiring high light-load efficiency and compact power delivery.
For engineers reviewing the LTC3622HDE#PBF datasheet, LTC3622HDE#PBF pinout, LTC3622HDE#PBF application, or LTC3622HDE#PBF equivalent, this page provides verified technical context, package mapping to the 14-lead 3mm × 4mm DFN, confirmed pin functions, real-world application constraints, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LTC3622HDE#PBF implements a constant-frequency peak-current-mode control architecture with internal compensation, enabling stable regulation across wide VIN/VOUT ranges. Each channel features independent RUN control, programmable current limit via ILIM, and selectable operation modes (Burst Mode® for <4µA single-channel IQ or pulse-skipping for low ripple).
It integrates dual N-channel and P-channel MOSFETs with RDS(ON) of 0.15Ω (NMOS) and 0.37Ω (PMOS) at VIN = 5V, supports 100% duty-cycle dropout operation, and provides ±1% output voltage accuracy over temperature. Phase shift between channels is controlled by PHASE pin state or external clock edge modulation on MODE/SYNC.
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 - sufficient for powering dual-core microcontrollers or FPGA I/O banks. |
| Quiescent Current | 5µA (both channels active), <4µA (one channel active) - enables multi-year battery life in always-on portable devices. |
| Switching Frequency | 1MHz (fixed) - allows use of small 3.3µH–4.7µH inductors and reduces EMI above AM band. |
| Output Voltage Accuracy | ±1% over temperature - ensures reliable logic-level compliance for 1.8V/2.5V/3.3V loads without margining. |
| Junction Temperature Range | –40°C to +150°C - qualified for under-hood automotive or high-ambient industrial environments. |
| Package | 14-lead 3mm × 4mm DFN with exposed pad - provides θJC = 4.4°C/W thermal path for high-power-density layouts. |
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, θJC = 4.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1, SW2 | Switch node outputs | Connect to inductor high-side terminals; require low-inductance layout to minimize ringing and EMI. |
| VIN1, VIN2 | Independent input supplies | Enable dual-rail operation (e.g., 12V for analog section, 5V for digital); each powers its own channel's FETs and bias circuitry. |
| FB1, FB2 | Feedback inputs | Sense 0.6V reference point; connect to resistor divider tap for adjustable VOUT or directly to VOUT for fixed-output variants. |
| RUN1, RUN2 | Channel enable inputs | Logic-high (>1.0V) activates respective regulator; must not float - tie to GND or INTVCC for permanent disable/enable. |
| MODE/SYNC | Mode select & sync input | Tie to INTVCC for Burst Mode® (ultralow IQ); tie to GND for pulse-skipping (low ripple); drive with external clock for synchronization. |
| PHASE | Inter-channel phase control | Tie to GND for 0° (in-phase); tie to INTVCC for 180° (anti-phase) - reduces input capacitor RMS current by up to 30%. |
| ILIM | Current limit configuration | GND = full 1.8A limit; INTVCC = 0.9A limit; 1V bias sets CH1=1.8A / CH2=0.9A - prevents overstress during startup or short-circuit. |
| PGOOD1, PGOOD2 | Open-drain status indicators | Assert low if VOUT deviates >7.5% from target; delay = 32 clock cycles - enables safe sequencing in multi-rail systems. |
| INTVCC | Internal LDO output | 3.3V–3.9V regulated supply for gate drivers and logic; bypass with ≥1µF low-ESR ceramic capacitor to GND. |
| GND | Power and signal ground | Common return for all channels and internal circuits; exposed pad must be solidly connected to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces no-load IQ to 5µA (dual-channel) - extends battery runtime in sleep-state IoT sensors and wearables. |
| 100% duty-cycle dropout mode | Maintains regulation as VIN approaches VOUT - critical for Li-ion discharge down to 3.0V while powering 2.8V rails. |
| Programmable inter-channel phase shift | 0° or 180° alignment (or externally modulated) - cuts input capacitor RMS current and eases EMI filtering requirements. |
| Independent RUN and PGOOD per channel | Enables staggered power-up, fault isolation, and dynamic rail shutdown - simplifies power sequencing in multi-processor systems. |
| Internal soft-start (500µs) | Prevents inrush current during enable - eliminates need for external soft-start circuitry in space-constrained designs. |
Applications
| Handheld Barcode Scanners | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Portable scanner powered by single-cell Li-ion (3.0–4.2V) requiring clean 1.8V for CMOS image sensor and 3.3V for BLE radio. IC Role / Device Role / Timing Role: Dual-output buck regulator delivering tightly regulated, low-noise rails with independent enable control and fast load transient response. Use Value: Burst Mode® extends battery life beyond 12 months in standby; 1MHz switching enables compact 2.2µH inductors and avoids audible noise. |
Use Scenario: DIN-rail mounted controller with 24V DC input powering isolated 5V logic and 3.3V FPGA core, operating in 70°C ambient enclosures. IC Role / Device Role / Timing Role: High-temperature-rated dual buck converter providing thermally robust, independently sequenced power rails. Use Value: 150°C junction rating ensures reliability without derating; anti-phase operation reduces input capacitor heating in convection-cooled housings. |
| Medical Point-of-Care Monitors | Automotive ADAS Camera Modules |
Use Scenario: Battery-backed vital sign monitor needing ultra-low IQ for 7-day standby and simultaneous 2.5V ADC reference + 1.2V processor core rails. IC Role / Device Role / Timing Role: Dual synchronous buck with precise ±1% VOUT accuracy and sub-5µA quiescent draw during deep sleep. Use Value: No-load IQ <4µA (single channel active) preserves battery charge; internal soft-start prevents sensor reset during wake-up. |
Use Scenario: Rear-view camera module supplied from vehicle 12V rail, requiring 3.3V image sensor and 1.8V ISP rails with EMI immunity near RF antennas. IC Role / Device Role / Timing Role: Synchronized dual buck with 180° phase shift and 1MHz fixed frequency to suppress conducted emissions in narrowband bands. Use Value: External clock sync aligns switching edges away from critical CAN/LIN timing windows; PGOOD enables fail-safe camera shutdown. |
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 |
|---|---|---|---|
| LTC3622IDE#PBF | Same electrical specs but rated for –40°C to +125°C junction temperature (vs. +150°C for LTC3622HDE#PBF). | Not suitable for under-hood automotive or high-ambient industrial use where sustained >125°C junction temperatures occur. | Select LTC3622HDE#PBF when operating ambient exceeds 85°C or thermal margin is constrained. |
| TPS65270PWP | 2.2MHz fixed frequency, 2A per channel, integrated FETs, but higher 25µA IQ and no Burst Mode®. | Lacks ultralow-IQ capability; unsuitable for multi-year battery applications; requires larger input capacitance due to higher fSW. | Choose only when higher output current or tighter board area constraints outweigh IQ and thermal requirements. |
Compared with LTC3622IDE#PBF and TPS65270PWP, the LTC3622HDE#PBF uniquely combines 150°C operation, 5µA dual-channel IQ, and programmable phase shift-making it optimal for thermally demanding, battery-sensitive dual-rail systems where long service life and EMI control are mandatory.
Availability
LTC3622HDE#PBF is available at Aetrix Electronics and suitable for battery-powered handheld scanners, industrial PLC I/O modules, and medical point-of-care monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3622HDE#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 power management ICs, serving industrial, automotive, communications, and healthcare markets with precision, reliability, and innovation.
The LTC3622HDE#PBF belongs to Analog Devices' Power by Linear™ family of high-efficiency DC/DC regulators, designed specifically for space-constrained, battery-sensitive applications demanding ultralow quiescent current and robust thermal performance.
FAQ
What is the maximum junction temperature rating for the LTC3622HDE#PBF?
The LTC3622HDE#PBF is guaranteed over a junction temperature range of –40°C to +150°C, making it suitable for high-ambient environments such as under-hood automotive or sealed industrial enclosures. This rating is explicitly defined in the Order Information table and confirmed in Absolute Maximum Ratings (Note 3). Thermal design must ensure θJA ≤ 40°C/W with proper PCB copper and exposed pad soldering to sustain this rating.
Does the LTC3622HDE#PBF support external frequency synchronization?
Yes, the LTC3622HDE#PBF supports external clock synchronization via the MODE/SYNC pin, with a capture range of ±50% around its nominal 1MHz frequency. When driven by an external clock, the device enters pulse-skipping mode and aligns switching edges to the external signal. The PHASE pin can further modulate inter-channel timing using clock edge transitions - enabling precise 90° or variable phase shifts as shown in Figure 1 of the datasheet.
How does the ILIM pin configure current limiting on the LTC3622HDE#PBF?
The ILIM pin on the LTC3622HDE#PBF sets per-channel peak current limits: tying ILIM to GND enables full 1.8A limit on both channels; connecting to INTVCC halves the limit to 0.9A on both; biasing to ~1V configures CH1 at 1.8A and CH2 at 0.9A. These settings are validated in Electrical Characteristics Table (ILIM row) and directly affect short-circuit protection behavior and inductor selection - critical for robust startup into heavy capacitive loads.
Can the LTC3622HDE#PBF operate with only one input supply connected?
Yes, the LTC3622HDE#PBF supports asymmetric input operation: VIN1 and VIN2 may be connected to different sources (e.g., 12V and 5V rails), or one may be left unconnected if its associated channel is disabled via RUNx. However, INTVCC is powered from VIN1, so VIN1 must be present and ≥2.7V for basic functionality. The datasheet confirms SVIN is MSOP-only and not present on the DFN-packaged LTC3622HDE#PBF.
What is the purpose of the PHASE pin on the LTC3622HDE#PBF?
The PHASE pin on the LTC3622HDE#PBF controls inter-channel timing: tied low, both channels switch in-phase (0° shift); tied high, they operate 180° out-of-phase - reducing input capacitor RMS current and system-level EMI. With an external clock applied to MODE/SYNC and PHASE high, phase shift becomes dynamically controllable via clock duty cycle, enabling fine-grained optimization for specific layout or noise-sensitive applications.
LTC3622HDE#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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LTC3622HDE#PBF FAQ
1.How can I place an order for LTC3622HDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622HDE#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#PBF reliable?
The price and inventory of LTC3622HDE#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#PBF is usually 5 days.
3.What payment methods are accepted for LTC3622HDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622HDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622HDE#PBF?
LTC3622HDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622HDE#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#PBF?
For technical support, including LTC3622HDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622HDE#PBF requirements.
6.How does Aetrix verify that LTC3622HDE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3622HDE#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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3622HDE#PBF?
All LTC3622HDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622HDE#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#PBF part is unused and in its original packaging.
Return procedure for LTC3622HDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3622HDE#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…
