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Analog Devices Inc. LTC3622HMSE-2#PBF
- Part No.:
- LTC3622HMSE-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3622HMSE-2#PBF.pdf
- Description:
- IC REG BUCK ADJ 1A DL 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:105
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Product details
Overview
LTC3622HMSE-2#PBF 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-used in battery-powered handheld scanners and point-of-load supplies requiring high light-load efficiency.
For engineers reviewing the LTC3622HMSE-2#PBF datasheet, LTC3622HMSE-2#PBF pinout, LTC3622HMSE-2#PBF application, or LTC3622HMSE-2#PBF equivalent, key selection criteria include its 2.25MHz switching frequency, ±1% output voltage accuracy, selectable Burst Mode®/pulse-skipping operation, 180° programmable inter-channel phase shift, and MSOP-16 package with exposed thermal pad.
Technical Context
The LTC3622HMSE-2#PBF implements a constant-frequency peak current-mode control architecture with internal compensation and soft-start. Its dual regulators operate independently with separate RUN, FB, PGOOD, and SW pins, enabling asymmetric output configurations and independent enable/disable sequencing.
It features integrated NMOS/PMOS power switches with typical RDS(ON) of 0.15Ω (NMOS) and 0.37Ω (PMOS) at VIN = 5V, ±50% external clock synchronization range, and programmable current limit via ILIM pin-supporting full (1.8A), half (0.9A), or channel-specific current settings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.25MHz fixed, synchronizable ±50% - enables compact 2.2µH–4.7µH inductors and reduces EMI filtering burden. |
| Input Voltage Range | 2.7V to 17V - supports single-cell Li-ion up to 12V industrial rails without pre-regulation. |
| Output Voltage Range | 0.6V to VIN per channel - allows direct 1.8V, 2.5V, 3.3V, or 5V generation from common input sources. |
| No-Load Quiescent Current | 5µA (both channels active), <4µA (one channel active) - extends battery life in always-on portable systems. |
| Output Voltage Accuracy | ±1% over line, load, and temperature - ensures stable MCU core and peripheral rail regulation without post-adjustment. |
| Peak Current Limit | 1.8A (ILIM = GND), 0.9A (ILIM = INTVCC), or mixed per channel - provides configurable short-circuit protection without external sensing. |
| Thermal Rating | –40°C to +150°C junction - qualified for under-hood automotive modules and high-ambient industrial enclosures. |
Pinout & Package
Package: 16-lead plastic MSOP with exposed thermal pad (Pin 17 = GND). Requires soldering of exposed pad to PCB ground plane for rated thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Channel 1 input supply | Primary power source for Channel 1 regulator and INTVCC LDO; must be ≥2.7V. |
| SVIN (Pin 2) | Signal VIN reference | Powers INTVCC independently; connect to higher of VIN1/VIN2 or via diode OR-ing network. |
| PGOOD1 (Pin 3) | Channel 1 power-good indicator | Open-drain output asserting high when VOUT1 is within ±7.5% of target; 32-cycle delay on fault. |
| 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 | Ground = 0° in-phase; INTVCC = 180° anti-phase or edge-controlled phase shift with external clock on MODE/SYNC. |
| PGOOD2 (Pin 6) | Channel 2 power-good indicator | Independent open-drain status signal for Channel 2; identical timing and tolerance as PGOOD1. |
| ILIM (Pin 7) | Current limit configuration | GND = 1.8A per channel; INTVCC = 0.9A per channel; 1V = 1.8A Ch1 / 0.9A Ch2. |
| VIN2 (Pin 8) | Channel 2 input supply | Independent input rail; may differ from VIN1 (e.g., separate battery or DC/DC stage). |
| SW2 (Pin 9) | Channel 2 switch node | Connects to inductor and low-side NMOS drain; requires tight layout to minimize EMI and shoot-through risk. |
| RUN2 (Pin 10) | Channel 2 enable control | Logic-high (>1.0V) activates regulator; must not float - tie to GND or controlled GPIO for sequencing. |
| FB2 (Pin 11) | Channel 2 feedback input | Senses resistor divider output; sets VOUT2 = 0.6V × (1 + R2/R1); short to VOUT2 for fixed-output variants. |
| INTVCC (Pin 12) | Internal LDO output | 3.3V–3.9V regulated supply for gate drivers and logic; bypass with ≥1µF low-ESR ceramic to GND. |
| FB1 (Pin 13) | Channel 1 feedback input | Identical function to FB2; enables independent output programming per channel. |
| RUN1 (Pin 14) | Channel 1 enable control | Independent logic-enable input; supports staggered startup or fault-isolated shutdown. |
| SW1 (Pin 16) | Channel 1 switch node | High dv/dt node requiring minimized trace area and guard ring; connects to inductor and NMOS drain. |
| GND (Pin 17) | Power and signal ground | Exposed thermal pad - must be soldered to solid PCB ground plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces no-load IQ to 5µA (both channels) while maintaining ±1% regulation - critical for >1-year battery life in IoT sensors. |
| 180° programmable phase shift | Halves input capacitor RMS current and cuts peak input ripple by ~30% versus in-phase operation - lowers bulk capacitance cost. |
| Integrated 0.6V reference & error amplifier | Enables precise output setting without external references; eliminates drift-related calibration in temperature-varying environments. |
| 100% duty cycle dropout mode | Maintains regulation down to VIN ≈ VOUT with minimal IQ increase - extends usable battery voltage range in Li-ion applications. |
| Independent RUN and PGOOD per channel | Supports asymmetric power sequencing, fault isolation, and system-level health monitoring without external logic. |
Applications
| Battery-Powered Handheld Scanners | Industrial Point-of-Load Supplies |
|---|---|
Use Scenario: Portable barcode scanner powered by single-cell Li-ion (2.8V–4.2V) requiring clean 3.3V for MCU and 1.8V for image sensor. IC Role / Device Role / Timing Role: Dual-output buck regulator providing independent, sequenced, low-noise rails with automatic light-load efficiency optimization. Use Value: 5µA quiescent current extends standby time beyond 6 months; 2.25MHz switching allows use of 2.2µH inductors fitting tight board space. |
Use Scenario: Programmable logic controller (PLC) module needing isolated 5V and 3.3V rails from 12V or 24V backplane supply. IC Role / Device Role / Timing Role: High-reliability dual buck converter delivering stable, monitored outputs with thermal derating up to +150°C junction. Use Value: 150°C-rated H-grade operation ensures uninterrupted function in sealed enclosures; PGOOD signals feed PLC watchdog circuitry. |
| Medical Wearable Sensors | Automotive Infotainment Subsystems |
Use Scenario: ECG patch using coin cell (3V) to generate 1.2V analog front-end and 2.8V BLE radio supply. IC Role / Device Role / Timing Role: Ultra-low-IQ dual regulator enabling multi-week continuous operation with minimal voltage droop during RF transmission bursts. Use Value: Burst Mode® maintains <5µA IQ even during intermittent 100mA BLE transmit peaks - avoids premature battery cutoff. |
Use Scenario: In-dash display unit deriving 5V USB host and 1.1V DDR memory rails from vehicle 9V–16V battery. IC Role / Device Role / Timing Role: Automotive-grade dual buck managing wide-input transients and cold-crank conditions with robust OVP/UVP protection. Use Value: 18.5V VIN overvoltage lockout prevents damage during jump-start events; 100% duty cycle sustains DDR supply during 6V cold-crank dips. |
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 |
|---|---|---|---|
| TPS65217CIRSLR | Single-chip PMIC with integrated LDOs, battery charger, and fuel gauge; 1.8MHz switching; lower max IOUT (0.8A per buck). | Targeted at TI-based AM335x/AM437x processors; lacks independent RUN/PGOOD per channel and phase-shift capability. | Select when system uses TI Sitara SoCs and requires battery management - not for standalone dual-buck replacement. |
| MP2491DS-LF-Z | Dual 1.2A buck with 500kHz–2.5MHz sync range; 22µA no-load IQ; no Burst Mode®, only forced CCM/pulse-skipping. | Lower thermal rating (–40°C to +125°C); no 180° phase shift or ILIM-programmable current limit. | Choose for cost-sensitive industrial designs where 22µA IQ is acceptable and phase control is unnecessary. |
Compared with TPS65217CIRSLR and MP2491DS-LF-Z, the LTC3622HMSE-2#PBF uniquely combines 5µA IQ, 180° phase shift, and H-grade 150°C operation - making it optimal for ultra-long-life portable devices and high-ambient automotive subsystems where efficiency, thermal resilience, and ripple control are co-critical.
Availability
LTC3622HMSE-2#PBF is available at Aetrix Electronics and suitable for battery-powered handheld scanners, industrial PLC modules, medical wearables, and automotive infotainment subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3622HMSE-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets since 1965.
The LTC3622 product line delivers dual-output, ultralow-quiescent-current DC/DC regulators for space-constrained, battery-dependent systems where efficiency across load extremes and thermal robustness are primary design requirements.
FAQ
What is the maximum input voltage rating for the LTC3622HMSE-2#PBF?
The LTC3622HMSE-2#PBF has an absolute maximum input voltage rating of 17V on VIN1 and VIN2 pins, with overvoltage lockout activating at 18.5V to protect internal MOSFETs. Operation above 17V risks permanent damage, and the device resumes normal function only after VIN drops below 18.2V. This OVP threshold ensures reliability in 12V automotive and industrial systems subject to load-dump transients.
Does the LTC3622HMSE-2#PBF support fixed-output voltage configurations without external resistors?
No - the LTC3622HMSE-2#PBF is the adjustable version of the LTC3622-2 family and requires external resistor dividers on FB1 and FB2 to set output voltages. Fixed-output variants (e.g., LTC3622-23/5) integrate internal feedback resistors; the LTC3622HMSE-2#PBF does not. For 5V/3.3V fixed outputs, use LTC3622HMSE-23/5#PBF instead.
How does the PHASE pin affect switching behavior in the LTC3622HMSE-2#PBF?
When PHASE = GND, both channels switch in-phase (0° offset); when PHASE = INTVCC, they operate 180° out-of-phase - reducing input capacitor RMS current and peak ripple. With an external clock applied to MODE/SYNC and PHASE = INTVCC, phase shift becomes edge-controlled (e.g., rising edge clocks Ch1, falling edge clocks Ch2), enabling precise 90° or other non-integer shifts as shown in Figure 1 of the datasheet.
Can the LTC3622HMSE-2#PBF operate with only one channel enabled?
Yes - the LTC3622HMSE-2#PBF supports independent channel control via RUN1 and RUN2 pins. Driving RUN1 high and RUN2 low enables only Channel 1, reducing total quiescent current to <4µA. Both PGOOD outputs remain functional, allowing system-level monitoring of the active channel alone without affecting the disabled channel's biasing or leakage.
What thermal performance can be expected from the LTC3622HMSE-2#PBF in MSOP package?
The LTC3622HMSE-2#PBF in MSOP-16 has θJA = 40°C/W and θJC = 10°C/W when the exposed pad (Pin 17) is soldered to a minimum 1-in² copper pour. At 1A per channel and 12V input, typical power dissipation is ~0.4W, resulting in ~16°C rise above ambient - well within its –40°C to +150°C junction rating. Thermal derating begins above 125°C per JEDEC JESD22-A108.
LTC3622HMSE-2#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:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3622HMSE-2#PBF FAQ
1.How can I place an order for LTC3622HMSE-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622HMSE-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 LTC3622HMSE-2#PBF reliable?
The price and inventory of LTC3622HMSE-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 LTC3622HMSE-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC3622HMSE-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622HMSE-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622HMSE-2#PBF?
LTC3622HMSE-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622HMSE-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 LTC3622HMSE-2#PBF?
For technical support, including LTC3622HMSE-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622HMSE-2#PBF requirements.
6.How does Aetrix verify that LTC3622HMSE-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3622HMSE-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 LTC3622HMSE-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC3622HMSE-2#PBF?
All LTC3622HMSE-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622HMSE-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 LTC3622HMSE-2#PBF part is unused and in its original packaging.
Return procedure for LTC3622HMSE-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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