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Analog Devices Inc. LTC3407EMSE#PBF
- Part No.:
- LTC3407EMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3407EMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
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Product details
Overview
LTC3407EMSE#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, synchronous step-down DC/DC converter IC designed for low-power portable systems. It delivers up to 600mA per channel from a 2.5V–5.5V input, operates at a fixed 1.5MHz switching frequency, integrates 0.35Ω P-channel and 0.30Ω N-channel MOSFETs, and supports adjustable output voltages from 0.6V to 5V - used in digital cameras and cellular handsets for compact, high-efficiency dual-rail power conversion.
For engineers reviewing the LTC3407EMSE#PBF datasheet, LTC3407EMSE#PBF pinout, LTC3407EMSE#PBF application, or LTC3407EMSE#PBF equivalent, key selection considerations include its dual-output burst-mode efficiency optimization, 40μA quiescent current in active mode, 100% duty-cycle dropout operation, externally synchronizable oscillator, and MSOP-10 thermal performance with exposed pad grounding.
Technical Context
The LTC3407EMSE#PBF employs a constant-frequency current-mode control architecture with shared 1.5MHz clocking across both channels and in-phase switching. Its dual independent feedback loops use 0.6V reference comparators to regulate each output via external resistor dividers, while overvoltage/undervoltage detection feeds a common open-drain POR output.
Mode selection via MODE/SYNC pin enables either Burst Mode® (for >95% light-load efficiency at higher ripple) or pulse-skipping mode (for <10mVpp ripple at expense of efficiency). In dropout, the P-channel top switch remains fully on with 100% duty cycle, and shutdown draws <1μA total supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-polymer, and 3.3V/5V system rails without pre-regulation. |
| Switching Frequency | 1.5MHz (typ) - enables use of 2.2μH inductors <2mm height and 10μF ceramic capacitors for ultra-compact layouts. |
| Output Current per Channel | 600mA continuous - sufficient for core logic, memory, and I/O rails in handheld devices. |
| Feedback Reference Voltage | 0.6V ±1.2% (–40°C to 85°C) - sets output accuracy and enables precise 1.2V, 1.8V, 2.5V, or 3.3V generation with standard resistor ratios. |
| Quiescent Current | 40μA (both channels active) - extends battery runtime in always-on subsystems like real-time clocks or sensor interfaces. |
| Shutdown Current | <1μA - meets stringent energy-harvesting and long-term storage requirements. |
| Power-On Reset Threshold | ±8.5% output regulation window - provides reliable system initialization timing with 175ms delay after regulation achieved. |
Pinout & Package
Package: 10-lead plastic MSOP (3mm × 3mm) with exposed thermal pad (Pin 11 = PGND), rated for –40°C to +85°C ambient operation and θJA = 45°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 feedback input | Connects to resistor divider output; regulates VOUT1 to 0.6V reference - determines output voltage setting accuracy and loop stability. |
| RUN1 (Pin 2) | Channel 1 enable control | High = enable, low = shutdown; must be actively driven - allows independent sequencing or power gating of first output rail. |
| VIN (Pin 3) | Main input power supply | Supplies both channels; requires local 10μF ceramic decoupling - low-impedance path critical for EMI suppression and transient response. |
| SW1 (Pin 4) | Channel 1 switch node | Connects to inductor and catch diode replacement path; swings between VIN and GND - PCB layout must minimize loop area to reduce radiated noise. |
| GND (Pin 5) | Analog ground reference | Not internally connected; ties to system ground plane - separates analog sensing from power return paths to avoid noise coupling into feedback. |
| MODE/SYNC (Pin 6) | Mode selection & sync input | Ground = pulse-skipping (low ripple); VIN = Burst Mode® (high efficiency); also accepts external 1.5MHz clock - enables system-level timing coordination and noise-sensitive design tradeoffs. |
| SW2 (Pin 7) | Channel 2 switch node | Identical function to SW1 but for second regulator - requires symmetrical layout with SW1 to prevent cross-talk and ensure matched transient response. |
| POR (Pin 8) | Power-on reset open-drain output | Pulled low if either VOUT deviates >±8.5%; releases after ~175ms - drives microcontroller reset or FPGA configuration enable with built-in timing. |
| RUN2 (Pin 9) | Channel 2 enable control | Independent enable for second channel - supports staggered startup, fault isolation, or dynamic rail disable during low-power states. |
| VFB2 (Pin 10) | Channel 2 feedback input | Same role as VFB1 for second output - enables dual independent voltage rails (e.g., 1.8V core + 2.5V I/O) from single IC. |
| Exposed Pad (Pin 11) | Power ground (PGND) | Mandatory solder connection to PCB ground plane - primary thermal path and low-impedance return for high-frequency switch currents. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous buck topology | Eliminates external Schottky diodes; achieves up to 96% peak efficiency with integrated 0.35Ω/0.30Ω MOSFETs - reduces BOM count and board area by ~30% vs discrete solutions. |
| Burst Mode® operation | Maintains >85% efficiency at 1mA load per channel - extends battery life in standby modes without compromising regulation accuracy. |
| 100% duty-cycle dropout | Supports VOUT ≥ VIN − (ILOAD × RDS(ON)) down to ~2.3V input - enables seamless transition during battery voltage sag in portable equipment. |
| Externally synchronizable oscillator | Accepts 1.5MHz external clock on MODE/SYNC pin - eliminates beat frequencies in multi-converter systems and simplifies EMI filtering. |
| Integrated power-on reset | Single open-drain POR output asserts low until both outputs stabilize within ±8.5% for ≥175ms - replaces discrete supervisor IC in space-constrained designs. |
Applications
| Digital Camera Power Management | Cellular Handset Baseband Supply |
|---|---|
Use Scenario: Dual-rail power for image sensor (1.8V) and ISP processor (2.5V) in compact camera modules. IC Role / Device Role / Timing Role: Primary dual-output DC/DC regulator providing tightly regulated, low-noise supplies synchronized to system clock. Use Value: 1.5MHz operation allows 2.2μH inductors <2mm tall; Burst Mode® extends battery life during preview mode with minimal voltage droop. |
Use Scenario: Independent 1.2V core and 2.8V RF transceiver supplies in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Dual synchronous buck converter delivering sequenced, low-quiescent-current rails for baseband SoC and RF front-end. Use Value: 40μA quiescent current preserves standby time; 100% duty-cycle dropout maintains regulation as Li-ion discharges from 4.2V to 3.0V. |
| Portable Media Player Audio Codec Supply | PDA Application Processor Core Rail |
Use Scenario: Clean 3.3V analog supply and 1.2V digital supply for high-fidelity audio codec in MP3 players. IC Role / Device Role / Timing Role: Dual-output regulator with pulse-skipping mode selected to minimize switching noise coupling into audio signal paths. Use Value: <10mVpp output ripple in pulse-skipping mode prevents audible artifacts; POR output ensures clean codec initialization. |
Use Scenario: Dynamic voltage scaling for ARM9/ARM11 application processors requiring 1.0V–1.3V core and 3.3V I/O rails. IC Role / Device Role / Timing Role: Programmable dual-buck controller supporting resistor-set outputs and independent RUN pin control for DVFS sequencing. Use Value: Adjustable 0.6V–5V outputs accommodate multiple processor families; RUN1/RUN2 pins enable hardware-controlled rail enable/disable during sleep states. |
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 |
|---|---|---|---|
| TPS62400DRCT | Fixed 1.2V/1.8V outputs; 2.5V–6V input; 2.25MHz switching; 22μA IQ | Non-adjustable outputs limit flexibility; higher frequency enables smaller passives but increases EMI risk | Select when fixed dual-rail outputs suffice and board space is more constrained than voltage flexibility. |
| MAX16922ATG+T | Automotive-grade AEC-Q100; 3.5V–36V input; 1.2A per channel; integrated watchdog | Higher voltage rating and automotive qualification increase cost and footprint; not optimized for sub-5V battery systems | Select only for automotive infotainment or telematics where extended input range and qualification are mandatory. |
Compared with TPS62400DRCT and MAX16922ATG+T, the LTC3407EMSE#PBF offers uniquely adjustable dual outputs, lowest quiescent current in active mode (40μA), and Burst Mode® efficiency optimization below 10mA - making it optimal for consumer battery-powered devices prioritizing runtime and design flexibility over fixed outputs or automotive compliance.
Availability
LTC3407EMSE#PBF is available at Aetrix Electronics and suitable for digital cameras, cellular handsets, and portable media players requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC3407EMSE#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 acquired Linear Technology in 2017 and continues its legacy of high-performance power management ICs with rigorous process control and application-focused design.
The LTC3407EMSE#PBF belongs to Linear's precision dual-output DC/DC converter product line, engineered specifically for space-constrained, battery-operated portable electronics demanding high light-load efficiency and accurate dual-rail regulation.
FAQ
What is the maximum output current per channel for the LTC3407EMSE#PBF?
The LTC3407EMSE#PBF delivers up to 600mA continuously per channel under typical conditions (VIN = 3.6V, TA = 25°C, with proper thermal layout). Peak switch current limit is specified at 1A minimum, but sustained output is limited by thermal dissipation in the MSOP-10 package - derating is required above 85°C ambient or with poor PCB copper area.
Does the LTC3407EMSE#PBF require external Schottky diodes?
No, the LTC3407EMSE#PBF does not require external Schottky diodes. It integrates synchronous P-channel and N-channel MOSFETs with RDS(ON) of 0.35Ω and 0.30Ω respectively, enabling high-efficiency operation without body-diode conduction losses - a key advantage over nonsynchronous buck regulators.
How does the MODE/SYNC pin affect LTC3407EMSE#PBF operation?
The MODE/SYNC pin on the LTC3407EMSE#PBF selects between Burst Mode® (pin tied to VIN) for highest light-load efficiency or pulse-skipping mode (pin grounded) for lowest output ripple. When driven by an external 1.5MHz clock, it forces pulse-skipping mode and synchronizes switching edges - critical for noise-sensitive mixed-signal systems.
What is the purpose of the exposed pad on the LTC3407EMSE#PBF MSOP package?
The exposed pad (Pin 11) on the LTC3407EMSE#PBF is designated PGND and must be soldered to a solid PCB ground plane. It serves as the primary thermal conduction path (θJA = 45°C/W) and low-impedance return for high-frequency switch currents - omitting this connection degrades thermal performance and may cause instability or premature failure.
Can the LTC3407EMSE#PBF operate with input voltage below 2.5V?
No, the LTC3407EMSE#PBF has a guaranteed operating input range of 2.5V to 5.5V. Below 2.5V, undervoltage lockout disables operation to prevent unstable regulation. The absolute maximum rating allows –0.3V to 6V, but functional operation is not assured outside the specified 2.5V–5.5V range - use only within datasheet limits for reliable LTC3407EMSE#PBF performance.
LTC3407EMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (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):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC3407EMSE#PBF FAQ
1.How can I place an order for LTC3407EMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3407EMSE#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 LTC3407EMSE#PBF reliable?
The price and inventory of LTC3407EMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3407EMSE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3407EMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3407EMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3407EMSE#PBF?
LTC3407EMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3407EMSE#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 LTC3407EMSE#PBF?
For technical support, including LTC3407EMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3407EMSE#PBF requirements.
6.How does Aetrix verify that LTC3407EMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3407EMSE#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 LTC3407EMSE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3407EMSE#PBF?
All LTC3407EMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3407EMSE#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 LTC3407EMSE#PBF part is unused and in its original packaging.
Return procedure for LTC3407EMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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