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Analog Devices Inc. LTC3622EMSE#TRPBF
- Part No.:
- LTC3622EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3622EMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,197
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Product details
Overview
LTC3622EMSE#TRPBF 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 input voltage range of 2.7V to 17V. 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 dual-rail power.
For engineers reviewing the LTC3622EMSE#TRPBF datasheet, LTC3622EMSE#TRPBF pinout, LTC3622EMSE#TRPBF application, or LTC3622EMSE#TRPBF equivalent, key selection criteria include its dual 1A output capability, 1MHz fixed-frequency operation with ±50% sync range, selectable Burst Mode® vs pulse-skipping mode, internal compensation, and MSOP-16 package compatibility with thermal pad grounding requirements.
Technical Context
The LTC3622EMSE#TRPBF implements a constant-frequency peak-current-mode control architecture across two independent buck regulators, each with dedicated RUN, FB, PGOOD, and SW pins. It features integrated PMOS/NMOS power switches with RDS(ON) of 0.37Ω (PMOS) and 0.15Ω (NMOS) at 5V input, and supports 100% duty-cycle dropout operation.
Its MODE/SYNC pin enables selection between Burst Mode® (≤5µA IQ, ≥400mA peak inductor current) and pulse-skipping mode (lower VOUT ripple, ≥66mA peak current), while the PHASE pin configures 0° or 180° inter-channel phase shift-critical for minimizing input capacitor RMS current in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-input industrial and battery-supplied systems including 12V nominal rails and Li-ion stacks. |
| Output Voltage Range | 0.6V to VIN - enables generation of sub-1V core supplies and matches input rail for LDO pre-regulation. |
| Max Output Current | 1A per channel - sufficient for powering dual-core microcontrollers or FPGA I/O banks without external current boosting. |
| Quiescent Current | 5µA (both channels active, no load) - extends battery life in always-on portable devices such as handheld scanners. |
| Switching Frequency | 1MHz (fixed) - allows use of small 3.3–4.7µH inductors and fits within EMI-sensitive frequency bands below 1.25MHz. |
| Feedback Reference | 0.6V ±1% - enables precise output regulation with minimal resistor tolerance impact on accuracy. |
| Package | 16-Lead MSOP with exposed thermal pad - provides 10°C/W θJC for reliable 1A operation at ambient up to 85°C. |
Pinout & Package
Package: 16-Lead Plastic MSOP (MSE) with exposed thermal pad (Pin 17 = GND). Requires soldering of exposed pad to PCB ground plane for rated thermal performance (θJA = 40°C/W, θJC = 10°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Channel 1 input supply | Primary input for first buck stage; also powers INTVCC LDO - must be ≥2.7V and ≤17V. |
| SVIN (Pin 2) | Signal VIN supply | MSOP-only bias rail for internal circuitry; connect to higher of VIN1/VIN2 via diode OR-ing to ensure stable INTVCC. |
| PGOOD1 (Pin 3) | Channel 1 power-good indicator | Open-drain output asserting high when VOUT1 is within ±7.5% of target - used for sequencing or fault monitoring. |
| MODE/SYNC (Pin 4) | Mode select & external clock input | Tie to INTVCC for Burst Mode®; tie to GND for pulse-skipping; apply external clock for synchronization and phase control. |
| PHASE (Pin 5) | Inter-channel phase configuration | Low = 0° in-phase operation; high = 180° anti-phase - reduces input capacitor RMS current by ~30%. |
| PGOOD2 (Pin 6) | Channel 2 power-good indicator | Independent open-drain status signal for second output - enables dual-rail validation before system boot. |
| ILIM (Pin 7) | Current limit programming | GND = full 1.8A peak limit; INTVCC = 0.9A; 1V bias sets CH1=1.8A / CH2=0.9A - supports asymmetric load designs. |
| VIN2 (Pin 8) | Channel 2 input supply | Independent input rail - allows dual-input systems (e.g., primary + backup battery) or different voltage domains. |
| SW2 (Pin 9) | Channel 2 switch node | Connects to CH2 inductor - requires low-inductance layout and Kelvin connection to minimize switching noise coupling. |
| RUN2 (Pin 10) | Channel 2 enable control | Active-high logic input - must not float; enables independent power sequencing of second output rail. |
| FB2 (Pin 11) | Channel 2 feedback input | Senses divided output voltage; internal 0.6V reference enables VOUT2 = 0.6V × (1 + R2/R1) - supports adjustable or fixed-VOUT configs. |
| INTVCC (Pin 12) | Internal LDO output | 3.3–3.9V regulated supply for internal circuitry; bypass with ≥1µF low-ESR ceramic capacitor to GND. |
| FB1 (Pin 13) | Channel 1 feedback input | Identical function to FB2 - enables independent output programming per channel with separate resistor dividers. |
| RUN1 (Pin 14) | Channel 1 enable control | Active-high logic input - supports staggered startup or fault-isolated shutdown of first output rail. |
| SW1 (Pin 16) | Channel 1 switch node | Connects to CH1 inductor - layout symmetry with SW2 critical for balanced phase-shifted operation. |
| GND (Pin 17) | Power and signal ground | Exposed thermal pad - must be soldered to solid PCB ground plane for thermal integrity and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 5µA with both channels active - enables >1-year battery life in always-on IoT sensors powered by coin cells. |
| 100% duty-cycle dropout operation | Maintains regulation down to VIN = VOUT - eliminates need for post-regulator LDOs in low-voltage battery discharge phases. |
| Internal compensation | No external compensation components required - reduces BOM count and layout sensitivity for rapid prototyping. |
| Selectably programmable current limit | Three ILIM states (1.8A, 0.9A, asymmetric) - supports flexible design reuse across varying load profiles without PCB respin. |
| 500µs soft-start ramp | Per-channel controlled startup - prevents inrush current and ensures monotonic voltage rise during power-up sequencing. |
Applications
| Battery-Powered Handheld Scanners | Industrial Dual-Rail Point-of-Load Supplies |
|---|---|
Use Scenario: Portable barcode scanner operating from single-cell Li-ion (2.7–4.2V) with dual 3.3V and 1.8V rails for imager and MCU. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing isolated, sequenced, and phase-shifted 1A outputs with ultralow IQ to maximize runtime. Use Value: 5µA no-load IQ extends battery life beyond 18 months in sleep mode; 1MHz switching enables compact 3.3µH inductors and <10mm² total solution size. |
Use Scenario: Programmable logic controller (PLC) I/O module requiring independent 5V and 3.3V supplies from 12–24V DC input. IC Role / Device Role / Timing Role: Dual-channel step-down converter delivering tightly regulated, phase-controlled outputs with PGOOD monitoring per rail. Use Value: 180° phase shift reduces input capacitor RMS current by 29%, allowing smaller 22µF X7R ceramics instead of larger tantalum units. |
| Portable Medical Diagnostic Devices | Automotive Infotainment Power Management |
Use Scenario: Handheld ultrasound probe with analog front-end (2.5V) and digital processing core (1.2V) powered from 3.7V Li-poly battery. IC Role / Device Role / Timing Role: Dual-output regulator supporting adjustable VOUT with independent RUN control for subsystem-level power gating. Use Value: Selectable Burst Mode® maintains >85% efficiency at 100µA loads, enabling continuous sensor monitoring without battery drain. |
Use Scenario: In-vehicle display unit drawing power from 9–16V automotive battery with strict EMI limits and thermal constraints. IC Role / Device Role / Timing Role: Synchronized dual buck converter operating at 1MHz with external clock to avoid AM radio band interference. Use Value: ±50% sync range allows alignment to system master clock, eliminating beat frequencies and easing EMC certification. |
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 |
|---|---|---|---|
| TPS65270PWP | 2.25MHz fixed frequency; 3A per channel; no Burst Mode®; requires external compensation. | Higher current, faster switching - suited for high-density computing modules but less optimal for ultra-low-IQ battery apps. | Choose TPS65270PWP when >1A per rail or >2MHz operation is required; avoid if <10µA IQ is mandatory. |
| MAX20073ATP+T | 2.2MHz fixed frequency; 2.5A per channel; AEC-Q100 qualified; integrated spread-spectrum modulation. | Automotive-grade reliability and EMI reduction - designed for under-hood environments, not optimized for consumer portable IQ. | Choose MAX20073ATP+T for automotive infotainment where qualification and EMI compliance outweigh IQ requirements. |
Compared with TPS65270PWP and MAX20073ATP+T, the LTC3622EMSE#TRPBF uniquely balances ultralow 5µA quiescent current, 1MHz EMI-friendly switching, and dual-channel phase control in a thermally enhanced MSOP package-making it optimal for space-constrained, battery-sensitive applications where efficiency at microamp loads is critical.
Availability
LTC3622EMSE#TRPBF is available at Aetrix Electronics and suitable for battery-powered handheld scanners, industrial dual-rail point-of-load supplies, and portable medical diagnostic devices requiring stable component supply with guaranteed long-term availability.
Supply support for LTC3622EMSE#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The LTC3622EMSE#TRPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency DC/DC converters, engineered specifically for ultra-low-power portable and battery-critical applications demanding precision regulation and minimal standby consumption.
FAQ
What is the maximum input voltage rating for the LTC3622EMSE#TRPBF?
The LTC3622EMSE#TRPBF has an absolute maximum input voltage rating of 17V on VIN1 and VIN2 pins. Operation above 18.5V triggers overvoltage lockout, suspending switching until voltage falls below 18.2V. This protection safeguards internal PMOS/NMOS switches and ensures robustness against transient surges in 12V industrial or automotive-derived supplies.
Does the LTC3622EMSE#TRPBF support fixed-output voltage configurations?
Yes, the LTC3622EMSE#TRPBF supports fixed-output variants (e.g., LTC3622-23/5 for 5V/3.3V), but the base LTC3622EMSE#TRPBF is adjustable. To configure fixed VOUT, connect FB1 and FB2 directly to their respective outputs-bypassing external resistors-since internal 0.6V reference and matched divider resistors are factory-trimmed for ±1% accuracy across temperature.
How does the PHASE pin affect system-level performance in the LTC3622EMSE#TRPBF?
The PHASE pin on the LTC3622EMSE#TRPBF selects 0° (in-phase) or 180° (anti-phase) operation between channels. At 180°, input capacitor RMS current drops ~29%, reducing heat and enabling smaller ceramic capacitors. This is especially valuable in space-constrained portable designs where thermal management and board area are critical constraints.
Can the LTC3622EMSE#TRPBF operate with only one channel enabled?
Yes, the LTC3622EMSE#TRPBF supports independent channel control via RUN1 and RUN2 pins. With only one channel active, quiescent current drops below 4µA - verified in datasheet testing. This capability enables dynamic power scaling in systems where subsystems wake intermittently, further extending battery life beyond what dual-channel operation allows.
What thermal considerations apply to the MSOP package of the LTC3622EMSE#TRPBF?
The LTC3622EMSE#TRPBF in MSOP package requires soldering of the exposed thermal pad (Pin 17) to a PCB ground plane to achieve rated θJC = 10°C/W. Without this connection, junction temperature rise increases significantly - potentially exceeding 125°C at 1A per channel in still-air conditions. A minimum 4-layer board with inner ground planes is recommended for sustained 1A operation.
LTC3622EMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) 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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3622EMSE#TRPBF FAQ
1.How can I place an order for LTC3622EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622EMSE#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 LTC3622EMSE#TRPBF reliable?
The price and inventory of LTC3622EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3622EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3622EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622EMSE#TRPBF?
LTC3622EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622EMSE#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 LTC3622EMSE#TRPBF?
For technical support, including LTC3622EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3622EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3622EMSE#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 LTC3622EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3622EMSE#TRPBF?
All LTC3622EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622EMSE#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 LTC3622EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3622EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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