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Analog Devices Inc. LTC3407IMSE-2#TRPBF
- Part No.:
- LTC3407IMSE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3407IMSE-2#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 800MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,963
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Product details
Overview
LTC3407IMSE-2#TRPBF from Analog Devices is a dual synchronous step-down DC/DC regulator delivering up to 800mA per channel from 2.5V–5.5V input, operating at a fixed 2.25MHz switching frequency with adjustable 0.6V–5V outputs. It integrates 0.35Ω P-channel and 0.30Ω N-channel MOSFETs, supports Burst Mode® for 95% peak efficiency and 40µA quiescent current, and targets space-constrained portable power rails in digital cameras and cellular handsets.
For engineers reviewing the LTC3407IMSE-2#TRPBF datasheet, LTC3407IMSE-2#TRPBF pinout, LTC3407IMSE-2#TRPBF application, or LTC3407IMSE-2#TRPBF equivalent, key selection criteria include dual-channel 2.25MHz operation, 0.6V feedback reference, MODE/SYNC-configurable low-noise vs. high-efficiency modes, and MSOP-10 thermal performance with exposed PGND pad.
Technical Context
The LTC3407IMSE-2#TRPBF employs a constant-frequency current-mode control architecture with shared 2.25MHz oscillator across both channels, enabling in-phase switching and precise load transient response. Its error amplifier compares VFB to a 0.6V reference, adjusting peak inductor current via ITH voltage to maintain regulation under line and load variations.
Burst Mode® operation activates automatically below light loads, disabling switching cycles until output droop triggers reactivation at 0.35V ITH threshold, while pulse-skipping mode maintains fixed-frequency operation with cycle skipping-both selectable via MODE/SYNC pin voltage level. Dropout operation sustains 100% duty cycle with continuous P-channel MOSFET conduction when VIN approaches VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-polymer, and regulated 3.3V/5V rails without external LDO pre-regulation. |
| Switching Frequency | 2.25MHz (typ) - enables use of 2.2µH inductors and 10µF ceramic capacitors with ≤1.2mm profile, minimizing board area. |
| Output Current per Channel | 800mA - sufficient for core logic, memory, and interface ICs in portable devices; limited by thermal design in MSOP-10 package. |
| Feedback Reference Voltage | 0.6V ±12mV (–40°C to 125°C) - sets output accuracy and enables precise 1.8V/2.5V/3.3V rails using standard resistor ratios. |
| Quiescent Current | 40µA (typ, both channels active) - extends battery runtime in always-on subsystems such as real-time clocks or sensor interfaces. |
| Shutdown Current | <1µA - ensures negligible drain during system sleep states, critical for multi-week standby in IoT endpoints. |
| Internal Switch RDS(ON) | 0.35Ω (P-ch), 0.30Ω (N-ch) - eliminates need for external Schottky diodes and reduces conduction loss at 800mA load. |
Pinout & Package
Package: 10-Lead Plastic MSOP with exposed power ground (PGND) pad (Pin 11), rated for –40°C to +125°C operation and θJA = 45°C/W. Requires solder connection of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 feedback input | Connects to resistive divider on VOUT1; 0.6V reference sets output voltage via VOUT = 0.6V × (1 + R2/R1). |
| RUN1 (Pin 2) | Channel 1 enable control | Logic-high (≥1.5V) enables Reg1; logic-low (≤0.3V) forces shutdown and reduces IQ to <1µA. |
| VIN (Pin 3) | Main power input | Supplies both channels; requires local 10µF ceramic decoupling to GND to suppress high-frequency switching noise. |
| SW1 (Pin 4) | Channel 1 switch node | Connects to inductor L1; swings between VIN and GND at 2.25MHz; layout must minimize loop area to reduce EMI. |
| GND (Pin 5) | Analog ground reference | Separate from PGND (Pin 11); connects to feedback divider ground and signal return paths to avoid noise coupling. |
| MODE/SYNC (Pin 6) | Mode selection & sync input | Tie to VIN for Burst Mode® (high efficiency); tie to GND for pulse-skipping (low ripple); apply external 2.25MHz clock for synchronization. |
| SW2 (Pin 7) | Channel 2 switch node | Identical function to SW1; must be routed symmetrically to SW1 for balanced thermal and EMI performance. |
| POR (Pin 8) | Power-on reset open-drain output | Pulls low if either VOUT deviates >±8.5%; releases after ~117ms (262,144 cycles) once both outputs are in regulation. |
| RUN2 (Pin 9) | Channel 2 enable control | Independent enable for Reg2; allows staggered startup or dynamic channel disable for power sequencing. |
| VFB2 (Pin 10) | Channel 2 feedback input | Functionally identical to VFB1; supports independent output voltage programming for dual-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2.25MHz synchronous buck topology | Enables compact 2-layer PCB designs with ≤1.2mm height using 2.2µH inductors and 10µF ceramic caps per channel. |
| Burst Mode® operation | Delivers ≥85% efficiency at 1mA load while maintaining 40µA quiescent current-critical for battery-backed real-time functions. |
| 0.6V precision feedback reference | Supports accurate 1.2V, 1.8V, 2.5V, and 3.3V outputs with <±1% total error over temperature and line variation. |
| Integrated 0.35Ω/0.30Ω MOSFETs | Eliminates external Schottky diodes and associated footprint/cost; reduces BOM count and improves thermal performance. |
| 100% duty-cycle dropout operation | Maintains regulation down to VOUT = VIN − (ILOAD × 0.35Ω), extending usable input range in brownout conditions. |
| AEC-Q100 qualified variants available | Industrial-grade LTC3407IMSE-2#TRPBF meets automotive reliability requirements for under-hood and infotainment subsystems. |
Applications
| Digital Camera Core Power | Cellular Phone Baseband Supply |
|---|---|
Use Scenario: Dual-rail power for CMOS image sensor (1.8V) and ISP processor (2.5V) in ultra-thin camera modules. IC Role / Device Role / Timing Role: Primary DC/DC converter providing regulated, low-noise, and fast-transient power to imaging subsystems. Use Value: 2.25MHz operation minimizes inductor size to fit within 4mm height constraint; Burst Mode® extends battery life during preview mode. |
Use Scenario: Independent 1.2V core and 2.8V I/O supplies for 4G LTE baseband SoC in smartphone mainboard. IC Role / Device Role / Timing Role: Dual-channel synchronous buck regulator enabling independent power domain control and sequencing. Use Value: MODE/SYNC-selectable pulse-skipping mode reduces RF interference during transmission bursts; POR output synchronizes SoC reset timing. |
| Portable Media Player Audio Codec | Wireless Modem RF Front-End |
Use Scenario: Low-noise 3.3V analog supply and 1.2V digital core rail for high-fidelity audio codec in DAPs. IC Role / Device Role / Timing Role: Precision voltage regulator delivering clean, stable power to sensitive analog circuitry. Use Value: 0.6V reference and tight load/line regulation (<0.5%) ensure <100µV output ripple in pulse-skipping mode for SNR-critical DACs. |
Use Scenario: Compact dual-rail supply for Wi-Fi/Bluetooth combo module requiring 1.8V PHY and 3.3V PA bias in M.2 form factor. IC Role / Device Role / Timing Role: High-efficiency, thermally optimized DC/DC solution meeting stringent 125°C junction temp requirement. Use Value: Exposed PGND pad and MSOP-10 thermal resistance (θJA = 45°C/W) allow full 800mA/channel operation without heatsink in confined spaces. |
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 |
|---|---|---|---|
| TPS62125DSGR | Single-channel, 3MHz, 300mA output; no MODE/SYNC pin; fixed 1.2V/1.5V/1.8V/3.3V options only. | Lacks dual-output flexibility and adjustable feedback; unsuitable for independent rail generation. | Select only if single-rail, fixed-output, higher-frequency (3MHz) operation is prioritized over dual-channel capability. |
| RT8059NGQW | Dual-channel, 2MHz, 600mA/channel; 0.6V reference; but no Burst Mode®, higher 100µA IQ, and no POR output. | Cannot match LTC3407IMSE-2#TRPBF's 40µA IQ or power-good sequencing; less suitable for battery longevity-critical designs. | Consider where cost sensitivity outweighs ultra-low IQ and integrated reset functionality. |
Compared with TPS62125DSGR and RT8059NGQW, the LTC3407IMSE-2#TRPBF uniquely delivers dual 800mA channels with 2.25MHz switching, 40µA quiescent current, programmable outputs, and POR-making it optimal for compact, battery-powered dual-rail systems demanding efficiency, precision, and sequencing control.
Availability
LTC3407IMSE-2#TRPBF is available at Aetrix Electronics and suitable for digital cameras, cellular phones, and wireless modems requiring stable component supply, extended temperature operation (–40°C to +125°C), and AEC-Q100-compliant alternatives.
Supply support for LTC3407IMSE-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 industrial, automotive, communications, and healthcare markets since 1965.
The LTC3407 series was designed specifically for ultra-compact, high-efficiency dual-output power conversion in portable electronics-emphasizing low IQ, high-frequency operation, and integrated MOSFETs to eliminate external diodes and simplify layout.
FAQ
What is the maximum output current per channel for the LTC3407IMSE-2#TRPBF?
The LTC3407IMSE-2#TRPBF delivers up to 800mA per channel continuously under typical thermal conditions in the MSOP-10 package. Peak current capability is limited by internal switch RDS(ON) (0.35Ω P-ch, 0.30Ω N-ch), inductor saturation, and PCB copper area. At 125°C ambient, derating is required to maintain safe junction temperature-refer to thermal data in the datasheet for layout-dependent limits.
Does the LTC3407IMSE-2#TRPBF support external frequency synchronization?
Yes, the LTC3407IMSE-2#TRPBF supports external synchronization via the MODE/SYNC pin (Pin 6). Applying a 2.25MHz square wave to this pin locks the internal oscillator and forces pulse-skipping mode. The device accepts TTL/CMOS-compatible logic levels and maintains synchronization across its full input voltage range (2.5V–5.5V) and temperature range (–40°C to +125°C).
How does the POR (Power-On Reset) function work on the LTC3407IMSE-2#TRPBF?
The POR pin (Pin 8) is an open-drain output that pulls low whenever either output voltage deviates beyond ±8.5% of its target. Once both outputs stabilize within regulation, a 262,144-cycle timer (~117ms at 2.25MHz) starts; POR goes high only after this delay. During Burst Mode® operation, timer progression depends on burst activity-tying POR to MODE/SYNC forces pulse-skipping to ensure deterministic reset timing.
Can the LTC3407IMSE-2#TRPBF operate with input voltage below 2.5V?
No-the absolute minimum input voltage for functional operation of the LTC3407IMSE-2#TRPBF is 2.5V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Below this, undervoltage lockout disables switching. The device will not regulate or deliver output current at VIN < 2.5V, even in dropout; attempting operation risks undefined behavior or failure to start.
What is the purpose of the exposed pad (Pin 11) on the LTC3407IMSE-2#TRPBF MSOP package?
The exposed pad (Pin 11) is designated PGND (power ground) and must be soldered to a dedicated PCB ground plane. It serves dual roles: (1) primary thermal path-reducing θJA from 45°C/W to ~30°C/W with adequate copper area-and (2) low-impedance return for high-frequency switch currents, minimizing ground bounce and EMI. Leaving it unconnected degrades thermal performance and may cause instability.
LTC3407IMSE-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (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):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 800mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC3407IMSE-2#TRPBF FAQ
1.How can I place an order for LTC3407IMSE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3407IMSE-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 LTC3407IMSE-2#TRPBF reliable?
The price and inventory of LTC3407IMSE-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 LTC3407IMSE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3407IMSE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3407IMSE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3407IMSE-2#TRPBF?
LTC3407IMSE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3407IMSE-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 LTC3407IMSE-2#TRPBF?
For technical support, including LTC3407IMSE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3407IMSE-2#TRPBF requirements.
6.How does Aetrix verify that LTC3407IMSE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3407IMSE-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 LTC3407IMSE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3407IMSE-2#TRPBF?
All LTC3407IMSE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3407IMSE-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 LTC3407IMSE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3407IMSE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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