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Analog Devices Inc. LTC3622IMSE-2#TRPBF
- Part No.:
- LTC3622IMSE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3622IMSE-2#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,176
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Product details
Overview
LTC3622IMSE-2#TRPBF from Analog Devices is a dual-channel, 1A synchronous step-down regulator with 2.25MHz fixed switching frequency, ultralow 5µA no-load quiescent current (both channels enabled), 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 - deployed in battery-powered handheld scanners and portable point-of-load supplies.
For engineers reviewing the LTC3622IMSE-2#TRPBF datasheet, LTC3622IMSE-2#TRPBF pinout, LTC3622IMSE-2#TRPBF application, or LTC3622IMSE-2#TRPBF equivalent, key selection criteria include its dual 1A output capability, 2.25MHz high-frequency operation enabling compact 2.2µH inductors, ±1% output voltage accuracy, selectable Burst Mode®/pulse-skipping mode, and MSOP-16 package with exposed thermal pad.
Technical Context
The LTC3622IMSE-2#TRPBF implements a constant-frequency peak current-mode control architecture with internal compensation, supporting 2.25MHz fixed operation or external synchronization across ±50% of nominal frequency. Each channel features independent RUN control, programmable current limit via ILIM pin, and 180° out-of-phase operation when PHASE = INTVCC.
It integrates dual N-channel and P-channel MOSFETs with RDS(ON) of 150mΩ (NMOS) and 370mΩ (PMOS) at VIN = 5V, operates down to 100% duty cycle in dropout, and includes integrated soft-start (500µs), overvoltage lockout (18.5V), and undervoltage lockout (2.5V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.25MHz fixed (LTC3622-2 variant); enables use of sub-3µH inductors and reduces EMI filter size |
| 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; supports core logic (0.8–1.2V), I/O (1.8–3.3V), and analog (5V) rails |
| No-Load Quiescent Current | 5µA with both channels enabled; extends battery life in always-on sensor nodes and standby systems |
| Output Accuracy | ±1% over line/load/temperature; ensures stable microcontroller core voltage under dynamic load conditions |
| Peak Output Current | 1A per channel; sufficient for powering FPGA I/O banks, RF transceivers, or dual-core microcontrollers |
| Package | 16-lead MSOP with exposed thermal pad; provides 10°C/W θJC for reliable 1A operation without heatsink |
Pinout & Package
16-lead plastic MSOP package (4mm × 3mm) with exposed thermal pad (Pin 17 = GND), rated for –40°C to +125°C junction temperature. Exposed pad must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Channel 1 input supply | Powers Channel 1 power stage and INTVCC LDO; accepts 2.7V–17V |
| SVIN (Pin 2) | Signal VIN input | Supplies INTVCC independently; 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 |
| 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–INTVCC–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 regulation |
| ILIM (Pin 7) | Current limit configuration | GND = full 1.8A limit; INTVCC = 0.9A limit; 1V bias sets Channel 1=1.8A / Channel 2=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; requires low-inductance layout and local ceramic bypass |
| RUN2 (Pin 10) | Channel 2 enable control | Logic-high active; must not float; allows independent sequencing of dual outputs |
| FB2 (Pin 11) | Channel 2 feedback input | Senses output via resistor divider; 0.6V reference enables 0.6V–VIN adjustment |
| INTVCC (Pin 12) | Internal LDO output | 3.6V regulated supply for gate drivers and logic; 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 input; supports staggered startup or fault isolation |
| SW1 (Pin 16) | Channel 1 switch node | High dv/dt node; requires tight loop area and Kelvin connection to inductor |
| GND (Pin 17) | Power and signal ground | Exposed thermal pad; must be solidly connected to PCB ground plane for thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Dual 1A synchronous buck regulators | Enables compact dual-rail power delivery without external MOSFETs or controllers |
| 2.25MHz fixed-frequency operation | Reduces inductor size to ≤2.2µH and minimizes footprint vs. 1MHz alternatives |
| Burst Mode® with 5µA no-load IQ | Extends battery runtime in always-on IoT sensors and wearable devices |
| 180° programmable phase shift | Cuts input capacitor RMS current by ~30% versus in-phase operation |
| Independent RUN and PGOOD per channel | Supports flexible power sequencing, fault reporting, and rail isolation in multi-domain systems |
| Integrated soft-start (500µs) | Prevents inrush current during startup; eliminates need for external timing components |
Applications
| Battery-Powered Handheld Scanners | Industrial Point-of-Load Supplies |
|---|---|
Use Scenario: Portable barcode scanner powered by single-cell Li-ion (3.0–4.2V) requiring clean 3.3V I/O and 1.2V processor core rails. IC Role / Device Role / Timing Role: Dual-output DC/DC converter generating both rails simultaneously with independent enable control and power-good monitoring. Use Value: 2.25MHz operation enables <3mm × 3mm total inductor area; 5µA quiescent current extends scan-session battery life beyond 8 hours. |
Use Scenario: Programmable logic controller (PLC) module needing isolated 5V and 3.3V rails from a 24V industrial bus. IC Role / Device Role / Timing Role: High-input-voltage dual buck regulator delivering regulated outputs with 180° phase shift to minimize input capacitor stress. Use Value: 17V max input rating accommodates 24V transients; anti-phase operation reduces required input bulk capacitance by 40%. |
| Portable Medical Sensors | Automotive Infotainment Subsystems |
Use Scenario: Wearable ECG monitor using coin-cell battery (2.8–3.6V) and requiring ultra-low-noise 1.8V analog front-end and 3.3V digital rail. IC Role / Device Role / Timing Role: Dual buck regulator operating in pulse-skipping mode (MODE/SYNC = GND) to suppress output ripple below 10mVpp. Use Value: Pulse-skipping mode achieves <15mVpp ripple at 10mA load while maintaining >85% efficiency - critical for ADC reference stability. |
Use Scenario: In-vehicle display unit drawing power from 12V battery with cold-crank tolerance down to 4.5V. IC Role / Device Role / Timing Role: Dual buck supplying 5V USB and 1.1V SoC core, leveraging 100% duty-cycle dropout operation during cranking. Use Value: Maintains regulation at VIN = 4.5V (100% duty cycle) with only 120mV dropout - avoids system reset during engine start. |
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 | 2.2MHz fixed frequency, 2A per channel, but 50µA no-load IQ (10× higher than LTC3622IMSE-2#TRPBF) | Higher output current suitable for FPGA power, but less optimal for battery life-critical designs | Select when >1A per rail is required and quiescent current is secondary |
| MP2491DS-LF-Z | 1.2MHz switching, 1.5A per channel, no phase-shift capability, 25µA no-load IQ | Lacks inter-channel phase control and Burst Mode®, limiting input ripple reduction and ultra-low-power operation | Choose for cost-sensitive industrial supplies where 2.25MHz and 5µA IQ are not mandatory |
Compared with TPS65270PWP and MP2491DS-LF-Z, the LTC3622IMSE-2#TRPBF uniquely combines 2.25MHz operation, 5µA quiescent current, and programmable 180° phase shift - making it optimal for space-constrained, battery-powered systems requiring dual regulated rails with minimal input/output ripple and maximum runtime.
Availability
LTC3622IMSE-2#TRPBF is available at Aetrix Electronics and suitable for battery-powered handheld scanners, portable medical sensors, and industrial point-of-load supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3622IMSE-2#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and healthcare markets.
The LTC3622 product line delivers dual-channel, ultralow-quiescent-current synchronous buck regulators targeting battery-operated and energy-sensitive embedded systems where efficiency, small size, and rail flexibility are critical.
FAQ
What is the switching frequency of the LTC3622IMSE-2#TRPBF?
The LTC3622IMSE-2#TRPBF operates at a fixed 2.25MHz switching frequency, as designated by the "-2" suffix in its part number. This frequency is factory-trimmed and remains stable across temperature and input voltage variations. It can also be synchronized to an external clock within ±50% of 2.25MHz (i.e., 1.125MHz to 3.375MHz) via the MODE/SYNC pin. The LTC3622IMSE-2#TRPBF does not support 1MHz operation - that is reserved for the base LTC3622 variant.
Does the LTC3622IMSE-2#TRPBF support adjustable output voltages?
Yes, the LTC3622IMSE-2#TRPBF supports fully adjustable outputs from 0.6V to VIN per channel using external resistor dividers connected to FB1 and FB2 pins. Its internal 0.6V reference enables precise programming (e.g., 1.2V = 0.6V × [1 + R2/R1] with R2/R1 = 1). Fixed-output variants (e.g., LTC3622-23/5) exist, but the LTC3622IMSE-2#TRPBF is the adjustable version - confirmed by its absence in the fixed-VOUT option table and presence in the "LTC3622-2" row with "Adjustable" VOUT listing.
How does the PHASE pin affect operation of the LTC3622IMSE-2#TRPBF?
The PHASE pin (Pin 5) configures inter-channel timing: tying it to GND forces 0° phase shift (in-phase switching), while tying it to INTVCC enables 180° anti-phase operation - reducing input capacitor RMS current and peak input ripple. When an external clock is applied to MODE/SYNC and PHASE = INTVCC, phase shift becomes duty-cycle-dependent (e.g., 90° possible). This behavior is explicitly documented in the Pin Functions and Applications Information sections of the LTC3622IMSE-2#TRPBF datasheet.
What is the quiescent current of the LTC3622IMSE-2#TRPBF under no-load conditions?
The LTC3622IMSE-2#TRPBF draws 5µA of input quiescent current with both channels enabled and in Burst Mode® operation (MODE/SYNC tied to INTVCC), as specified in the Electrical Characteristics table. With only one channel enabled, IQ drops below 4µA. These values are measured at TA = 25°C and VIN = 12V, and remain valid across the full –40°C to +125°C operating junction temperature range per the datasheet's "l"-marked specifications.
Can the LTC3622IMSE-2#TRPBF operate in 100% duty cycle dropout mode?
Yes, the LTC3622IMSE-2#TRPBF supports 100% duty cycle operation when VIN approaches VOUT, enabling regulation down to VIN = VOUT + dropout voltage (dominated by RDS(ON) of the PMOS switch). During dropout, it transitions between active switching and sleep mode to maintain regulation while minimizing IQ - a feature verified in the "High Duty Cycle/Dropout Operation" section and confirmed by efficiency-vs-load curves showing sustained regulation at VIN = 5V, VOUT = 3.3V.
LTC3622IMSE-2#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:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3622IMSE-2#TRPBF FAQ
1.How can I place an order for LTC3622IMSE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622IMSE-2#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 LTC3622IMSE-2#TRPBF reliable?
The price and inventory of LTC3622IMSE-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3622IMSE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3622IMSE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622IMSE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622IMSE-2#TRPBF?
LTC3622IMSE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622IMSE-2#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 LTC3622IMSE-2#TRPBF?
For technical support, including LTC3622IMSE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622IMSE-2#TRPBF requirements.
6.How does Aetrix verify that LTC3622IMSE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3622IMSE-2#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 LTC3622IMSE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3622IMSE-2#TRPBF?
All LTC3622IMSE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622IMSE-2#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 LTC3622IMSE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3622IMSE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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