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Analog Devices Inc. LTC3622IMSE#PBF
- Part No.:
- LTC3622IMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3622IMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:111
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Product details
Overview
LTC3622IMSE#PBF from Analog Devices is a dual-channel, 1A synchronous step-down DC/DC regulator with fixed 1MHz switching frequency, ultralow 5µA no-load quiescent current (both channels enabled), ±1% output voltage accuracy, and operation across 2.7V–17V input range-designed for battery-powered portable scanners requiring compact, high-efficiency dual-rail power delivery.
For engineers reviewing the LTC3622IMSE#PBF datasheet, LTC3622IMSE#PBF pinout, LTC3622IMSE#PBF application, or LTC3622IMSE#PBF equivalent, key selection considerations include its dual independent RUN control, selectable Burst Mode® vs pulse-skipping operation, 180° phase-shift capability via PHASE pin, and MSOP-16 package compatibility with space-constrained point-of-load designs.
Technical Context
The LTC3622IMSE#PBF implements a constant-frequency peak-current-mode control architecture with internal compensation, supporting independent channel enable/disable via RUN1/RUN2 and programmable current limit via ILIM pin. Its dual regulators share a single INTVCC LDO powered from VIN1 or SVIN (MSOP-only), enabling flexible input sourcing.
It features synchronized external clock input (±50% capture range), phase-selectable operation (0° or 180° via PHASE pin), and integrated overvoltage lockout (18.5V) and undervoltage lockout (2.5V). Each channel delivers up to 1A with 0.6V–VIN adjustable output or fixed 5V/3.3V options in variant parts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and battery systems including 12V nominal rails and Li-ion stacks. |
| Output Current per Channel | 1A continuous - enables dual independent 1A rails without external current sharing. |
| Quiescent Current | 5µA (both channels active, no load) - extends battery life in always-on portable devices. |
| Switching Frequency | 1MHz (fixed) - allows use of compact 4.7µH inductors and reduces EMI filtering burden. |
| Output Voltage Accuracy | ±1% over line/load/temperature - ensures stable logic supply margins for microcontrollers and sensors. |
| Feedback Reference Voltage | 0.6V - enables low-output-voltage regulation down to 0.6V with standard resistor dividers. |
| Operating Junction Temp | –40°C to 125°C - qualified for automotive cabin and industrial embedded environments. |
Pinout & Package
Package: 16-Lead Plastic MSOP (3mm × 4.9mm), exposed pad (Pin 17) tied to GND for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Channel 1 input supply | Powers Channel 1 switch and INTVCC LDO; must be ≥2.7V for regulation. |
| SVIN (Pin 2) | Signal VIN input | MSOP-only dedicated INTVCC input; connect to higher of VIN1/VIN2 or via diode OR-ing. |
| PGOOD1 (Pin 3) | Channel 1 power-good indicator | Open-drain output asserting high when VOUT1 is within ±7.5% of target for ≥32 cycles. |
| MODE/SYNC (Pin 4) | Mode select & external clock input | Tie to INTVCC for Burst Mode® (low IQ); tie to GND for pulse-skipping (low ripple); accept 0.4V–(VINTVCC–0.3V) external clock. |
| PHASE (Pin 5) | Inter-channel phase control | Tie to GND for 0° (in-phase); tie to INTVCC for 180° (anti-phase) to reduce input ripple. |
| PGOOD2 (Pin 6) | Channel 2 power-good indicator | Independent open-drain status signal for VOUT2, identical timing behavior to PGOOD1. |
| ILIM (Pin 7) | Current limit configuration | GND = full 1.8A limit; INTVCC = 0.9A limit; 1V bias sets CH1=1.8A/CH2=0.9A. |
| VIN2 (Pin 8) | Channel 2 input supply | Independent input rail; may differ from VIN1 (e.g., separate battery or supply domain). |
| SW2 (Pin 9) | Channel 2 switch node | Connects to inductor high-side terminal; requires low-inductance layout to minimize EMI. |
| RUN2 (Pin 10) | Channel 2 enable control | Logic-high (>1.0V) enables regulation; floating not allowed - must be pulled high or low. |
| FB2 (Pin 11) | Channel 2 feedback input | Senses output divider tap; 10nA input bias enables high-value resistors for low IQ. |
| INTVCC (Pin 12) | Internal LDO output | 3.3V–3.9V regulated supply for internal circuitry; bypass with ≥1µF low-ESR capacitor. |
| FB1 (Pin 13) | Channel 1 feedback input | Identical function to FB2; supports independent output programming per channel. |
| RUN1 (Pin 14) | Channel 1 enable control | Independent logic enable; allows staggered startup or dynamic rail sequencing. |
| SW1 (Pin 16) | Channel 1 switch node | High-frequency switching node; requires tight loop area with input/output capacitors. |
| GND (Pin 17) | Power and signal ground | Exposed pad must be soldered to PCB ground plane for thermal dissipation and noise control. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent RUN inputs | Enables precise power sequencing, rail isolation, and dynamic channel disable for system-level power management. |
| Burst Mode® operation | Reduces no-load IQ to 5µA while maintaining regulation - critical for multi-week battery life in handheld scanners. |
| 180° phase-shift capability | Halves input ripple current amplitude versus in-phase operation, easing input capacitor sizing and EMI filter design. |
| Integrated soft-start (500µs) | Prevents inrush current during startup; ramps output linearly to avoid overshoot on sensitive loads. |
| Internal compensation | Eliminates external compensation components - reduces BOM count and layout sensitivity for rapid prototyping. |
| Overvoltage lockout (18.5V) | Protects internal MOSFETs against transient surges on 12V/15V rails without external TVS dependency. |
Applications
| Handheld Barcode Scanners | Industrial IoT Sensor Nodes |
|---|---|
Use Scenario: Compact, battery-operated scanner requiring dual 3.3V logic and 5V imager rails with >100-hour runtime. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing isolated, sequenced, low-noise power rails with independent enable control. Use Value: 5µA quiescent current extends battery life; 1MHz switching enables miniature 4.7µH inductors; MSOP-16 fits <100mm² PCB area. |
Use Scenario: Remote wireless sensor node powered by Li-SOCl₂ battery, needing 1.8V MCU core and 3.3V RF transceiver supplies. IC Role / Device Role / Timing Role: Dual adjustable buck converter delivering tightly regulated, low-ripple outputs with programmable light-load efficiency mode. Use Value: ±1% output accuracy ensures reliable ADC reference and RF PA bias; 2.7V min VIN supports deep battery discharge. |
| Portable Medical Diagnostic Tools | Automotive Infotainment Accessories |
Use Scenario: Battery-powered ultrasound probe requiring clean 1.2V analog front-end and 2.5V digital processing rails. IC Role / Device Role / Timing Role: Dual-channel step-down regulator with selectable pulse-skipping mode to minimize output ripple on analog supplies. Use Value: Pulse-skipping mode reduces VOUT ripple below 20mVpp at light loads; 125°C temp grade supports enclosed enclosures. |
Use Scenario: Aftermarket OBD-II adapter drawing power from vehicle 12V bus, needing 5V USB and 3.3V MCU rails. IC Role / Device Role / Timing Role: Dual buck regulator with 17V max VIN and overvoltage lockout protecting against load-dump transients. Use Value: 18.5V OVLO prevents damage during automotive load dump; 16-pin MSOP simplifies thermal relief on double-sided PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270PWPR | 2.2MHz fixed frequency, 2A per channel, no Burst Mode®, 12µA IQ (both channels) | Higher current, higher IQ, no ultralow-power sleep mode - unsuitable for multi-week battery life | Select only if >1A per rail and higher switching frequency are required; verify thermal derating at 125°C. |
| MAX20075ATPA/VY+ | 3.5V–36V input, 1.5A per channel, 2.1MHz, integrated FETs, 28µA IQ (both channels) | Wider VIN, higher IQ, automotive AEC-Q100 qualified - over-specified for portable consumer use | Choose only for automotive-grade designs requiring 36V tolerance and AEC-Q100 compliance; adds cost and footprint overhead. |
Compared with TPS65270PWPR and MAX20075ATPA/VY+, the LTC3622IMSE#PBF uniquely balances ultralow 5µA quiescent current, 1MHz switching for compact magnetics, and MSOP-16 thermal performance - making it optimal for space- and battery-limited portable electronics where efficiency at microamp loads is non-negotiable.
Availability
LTC3622IMSE#PBF is available at Aetrix Electronics and suitable for handheld scanners, industrial IoT sensor nodes, and portable medical diagnostic tools requiring stable component supply with long-term manufacturability.
Supply support for LTC3622IMSE#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 (now part of Analog Devices, Inc., following merger with Maxim Integrated) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3622 product line delivers dual-channel, ultralow-IQ synchronous buck regulators targeting battery-powered portable equipment where extended runtime and compact size are critical design constraints.
FAQ
What is the maximum input voltage rating for the LTC3622IMSE#PBF?
The LTC3622IMSE#PBF has an absolute maximum input voltage of 17V on VIN1 and VIN2 pins, with overvoltage lockout triggering at 18.5V to protect internal MOSFETs. Operation above 17V violates Absolute Maximum Ratings and risks permanent damage. The device is rated for continuous operation from 2.7V to 17V, making it suitable for 12V nominal systems with transient margin.
Does the LTC3622IMSE#PBF support independent output voltage programming for each channel?
Yes, the LTC3622IMSE#PBF supports fully independent output voltage programming via FB1 and FB2 pins. Each channel uses a 0.6V internal reference, allowing adjustable outputs from 0.6V to VIN using external resistor dividers. Fixed-output variants (e.g., LTC3622-23/5) exist, but the LTC3622IMSE#PBF itself is the adjustable version requiring external feedback networks.
How does the PHASE pin affect system-level performance in the LTC3622IMSE#PBF?
The PHASE pin on the LTC3622IMSE#PBF selects inter-channel phase relationship: grounded for 0° (in-phase) or tied to INTVCC for 180° (anti-phase). Anti-phase operation reduces RMS input ripple current by ~30%, lowering input capacitor stress and EMI. This is especially valuable in compact layouts where shared input capacitance must serve both channels efficiently.
Can the LTC3622IMSE#PBF operate in dropout mode, and what happens to efficiency?
Yes, the LTC3622IMSE#PBF supports 100% duty-cycle dropout operation when VIN approaches VOUT. In this mode, the top PMOS switch remains continuously on, minimizing conduction loss. Efficiency remains high (>90%) even at low VIN due to low RDS(ON) and absence of switching loss - confirmed in Typical Performance Characteristic Figure G03 (100% Duty Cycle curve).
What is the purpose of the SVIN pin on the LTC3622IMSE#PBF, and is it required?
The SVIN pin on the LTC3622IMSE#PBF is a dedicated input for the INTVCC LDO, present only in the MSOP package. It must be connected - either directly to the higher of VIN1/VIN2 or via diode-OR to both - to ensure stable 3.6V internal supply. Leaving SVIN unconnected risks INTVCC collapse, causing regulator shutdown or erratic behavior, especially during input transients.
LTC3622IMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) 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:
- 16-MSOP-EP
LTC3622IMSE#PBF FAQ
1.How can I place an order for LTC3622IMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622IMSE#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 LTC3622IMSE#PBF reliable?
The price and inventory of LTC3622IMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3622IMSE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3622IMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622IMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622IMSE#PBF?
LTC3622IMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622IMSE#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 LTC3622IMSE#PBF?
For technical support, including LTC3622IMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622IMSE#PBF requirements.
6.How does Aetrix verify that LTC3622IMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3622IMSE#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 LTC3622IMSE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3622IMSE#PBF?
All LTC3622IMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622IMSE#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 LTC3622IMSE#PBF part is unused and in its original packaging.
Return procedure for LTC3622IMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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