My Inquiry
My Account
Analog Devices Inc. LTC3407EDD-3#TRPBF
- Part No.:
- LTC3407EDD-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3407EDD-3#TRPBF.pdf
- Description:
- IC REG BUCK 1.8V/3.3V DL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,017
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3407EDD-3#TRPBF 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 1.8V/0.8A and 3.3V/0.8A outputs from a 3.3V–5.5V input, operates at a fixed 2.25MHz switching frequency, features internal 0.35Ω P-channel and 0.30Ω N-channel MOSFETs, and supports Burst Mode® operation for 40μA quiescent current - enabling use in battery-powered digital cameras and cellular handsets.
For engineers reviewing the LTC3407EDD-3#TRPBF datasheet, LTC3407EDD-3#TRPBF pinout, LTC3407EDD-3#TRPBF application, or LTC3407EDD-3#TRPBF equivalent, key selection criteria include verified dual-output voltage accuracy (±1.8% over temperature), confirmed 2.25MHz constant-frequency operation with external synchronization capability, validated 100% duty-cycle dropout behavior, and documented thermal performance in the 3mm × 3mm DFN package with exposed pad.
Technical Context
The LTC3407EDD-3#TRPBF employs a current-mode control architecture with shared 2.25MHz oscillator across both channels, enabling in-phase switching and precise load transient response. Each channel integrates matched P-channel high-side and N-channel synchronous rectifier switches, eliminating external Schottky diodes while supporting continuous conduction mode and 100% duty-cycle operation during dropout.
Its MODE/SYNC pin provides hardware-selectable operating modes: tie to VIN for Burst Mode® (40μA IQ, higher ripple), tie to GND for pulse-skipping mode (low-noise, fixed-frequency down to light loads), or drive with external 2.25MHz clock for synchronization. The POR output delivers a 117ms reset delay after both outputs achieve regulation within –8.5% of target.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 5.5V - supports single-cell Li-ion or regulated 3.3V/5V rails without external LDO pre-regulation. |
| Output Voltages | 1.8V ±1.8% and 3.3V ±1.8% - factory-trimmed feedback dividers enable accurate core I/O rail generation without external resistors. |
| Switching Frequency | 2.25MHz (±25%) - enables use of sub-3mm-height inductors (e.g., 2.2μH) and ceramic capacitors ≤10μF for ultra-thin portable designs. |
| Peak Switch Current | 1.2A per channel - sufficient to sustain 800mA output with margin under worst-case RDS(ON) and thermal conditions. |
| Quiescent Current | 40μA total (both channels active) - extends battery runtime in standby states for handheld devices. |
| Shutdown Current | <1μA - ensures negligible drain on primary battery during system sleep or power-off. |
| Thermal Package | 10-lead 3mm × 3mm DFN with exposed PGND pad - θJA = 40°C/W enables >500mW power dissipation at 85°C ambient without forced airflow. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed power ground pad (Pin 11), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT1 (Pin 1) | Channel 1 feedback node | Connects to internal 0.6V reference amplifier; sets 1.8V output via internal resistor divider - no external components required. |
| RUN1 (Pin 2) | Channel 1 enable input | Active-high logic: ≥1.5V enables regulator; ≤0.3V disables with <1μA leakage - supports independent power sequencing. |
| VIN (Pin 3) | Main power input | Supplies both channels and internal circuitry; requires local 10μF ceramic decoupling to minimize high-frequency noise injection. |
| SW1 (Pin 4) | Channel 1 switch node | Drives external inductor; swings from VIN to GND; must be routed with minimal loop area to reduce EMI and switching losses. |
| GND (Pin 5) | Analog ground reference | Separate from PGND; connects to PCB ground plane for signal integrity - not internally bonded to exposed pad. |
| MODE/SYNC (Pin 6) | Mode select & sync input | Configures Burst Mode® (VIN), pulse-skipping (GND), or accepts 2.25MHz external clock - determines light-load efficiency vs. noise tradeoff. |
| SW2 (Pin 7) | Channel 2 switch node | Identical function to SW1; shares same oscillator but operates independently - enables dual-rail power with isolated inductor paths. |
| POR (Pin 8) | Power-on reset open-drain output | Pulls low if either VOUT drops >8.5% below regulation; releases after 262,144 clock cycles (~117ms) - provides system-level reset timing. |
| RUN2 (Pin 9) | Channel 2 enable input | Independent enable control identical to RUN1 - allows staggered startup or dynamic rail disable for power management. |
| VOUT2 (Pin 10) | Channel 2 feedback node | Internal 0.6V reference amplifier input; sets 3.3V output - eliminates need for external feedback resistors or trimming. |
| Exposed Pad (Pin 11) | Power ground (PGND) | Mandatory solder connection to PCB ground plane; carries high-frequency return current from both switch nodes - critical for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Simultaneous 1.8V/0.8A and 3.3V/0.8A outputs with separate RUN and feedback pins - eliminates need for two discrete converters in space-constrained designs. |
| Synchronous rectification | Integrated 0.35Ω P-channel and 0.30Ω N-channel MOSFETs per channel - achieves up to 95% efficiency without external Schottky diodes or associated layout complexity. |
| Burst Mode® operation | Reduces total quiescent current to 40μA while maintaining regulation - extends battery life in always-on subsystems like camera sensors or Bluetooth radios. |
| 100% duty-cycle dropout | Enables VOUT tracking VIN down to VOUT + RDS(ON)·ILOAD - sustains operation during brownout events without rail collapse or system reset. |
| Externally synchronizable oscillator | Accepts 2.25MHz clock on MODE/SYNC pin - eliminates beat frequencies in multi-converter systems and simplifies EMI filtering. |
Applications
| Digital Camera Power Management | Cellular Handset Baseband Supply |
|---|---|
Use Scenario: Powers image sensor (1.8V) and ISP/FPGA I/O (3.3V) in compact point-and-shoot cameras with single Li-ion cell input. IC Role / Device Role / Timing Role: Dual-output DC/DC regulator providing tightly regulated, low-noise rails with independent enable control for power sequencing. Use Value: Enables 3mm × 3mm board footprint and >12-hour standby via 40μA quiescent current - meets stringent thickness and battery-life requirements. | Use Scenario: Supplies application processor core (1.8V) and RF transceiver interface (3.3V) in GSM/UMTS handsets operating from 3.6V nominal battery. IC Role / Device Role / Timing Role: Synchronous buck converter delivering fast load-transient response (<20μs recovery) to handle bursty processor activity. Use Value: Achieves 95% peak efficiency at 500mA load, reducing thermal load on PCB and extending talk time by 8% versus non-synchronous alternatives. |
| Portable Media Player Audio Codec Supply | Wireless Modem Baseband Power |
Use Scenario: Generates clean 1.8V analog supply for audio DAC and 3.3V digital supply for SD card interface in MP3 players. IC Role / Device Role / Timing Role: Dual-channel regulator with pulse-skipping mode selected via MODE/SYNC = GND to minimize output ripple (<15mVpp) on sensitive analog rail. Use Value: Eliminates audible switching noise in headphones by suppressing sub-harmonics - verified via 2.25MHz fixed-frequency operation and optimized LC filter design. | Use Scenario: Powers baseband processor (1.8V) and Ethernet PHY (3.3V) in DSL/wireless broadband modems powered from 5V wall adapter. IC Role / Device Role / Timing Role: High-frequency synchronous buck converter enabling small 2.2μH inductors and ceramic output caps - reduces solution size by 40% vs. 500kHz alternatives. Use Value: Supports 2.25MHz operation with external synchronization to avoid interference with 2.4GHz RF band - critical for coexistence in integrated modem/radio designs. |
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 |
|---|---|---|---|
| TPS62125DSGR | Single-output 1.8V/1A; requires external feedback for 3.3V rail; 2.25MHz sync capable; 22μA IQ. | Not dual-output - needs second converter or LDO for 3.3V; better for cost-sensitive single-rail systems. | Select when only 1.8V rail is needed and lowest possible IQ is critical; add TPS79633 for 3.3V if required. |
| RT8059NGQW | Dual-output (1.8V/1A + 3.3V/1A); 1.5MHz max frequency; 55μA IQ; no external sync; different pinout. | Lower switching frequency requires larger inductors; higher IQ reduces battery life; incompatible pin mapping prevents drop-in replacement. | Choose for higher output current headroom and simpler mode control - but expect layout redesign and thermal derating at 2.25MHz-equivalent loads. |
Compared with TPS62125DSGR and RT8059NGQW, the LTC3407EDD-3#TRPBF uniquely integrates dual precision outputs with Burst Mode® and synchronization in a single 3mm × 3mm DFN, offering superior space efficiency and verified 40μA light-load IQ for portable battery systems.
Availability
LTC3407EDD-3#TRPBF is available at Aetrix Electronics and suitable for digital cameras, cellular handsets, and portable media players requiring stable component supply, long-term production continuity, and guaranteed RoHS-compliant packaging.
Supply support for LTC3407EDD-3#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and consumer markets.
The LTC3407EDD-3#TRPBF belongs to Linear's µPower DC/DC converter family, engineered specifically for ultra-low-quiescent-current, high-frequency operation in space- and battery-constrained portable electronics.
FAQ
What is the maximum output current capability of each channel in the LTC3407EDD-3#TRPBF?
The LTC3407EDD-3#TRPBF supports up to 0.8A continuous output current per channel under typical thermal conditions (TA = 25°C, 2-layer PCB). Its 1.2A peak switch current limit and 0.35Ω top-switch RDS(ON) allow sustained 800mA delivery at 1.8V and 3.3V outputs with proper layout and thermal management - verified in Figure 1 of the official datasheet.
Does the LTC3407EDD-3#TRPBF require external feedback resistors to set its output voltages?
No, the LTC3407EDD-3#TRPBF does not require external feedback resistors. Its 1.8V and 3.3V outputs are set by internal precision resistor dividers referenced to a 0.6V bandgap - confirmed in the "ELECTRICAL CHARACTERISTICS" table (VOUT1 = 1.8V, VOUT2 = 3.3V) and "PIN FUNCTIONS" section, which states VOUT1 and VOUT2 connect directly to internal error amplifiers.
How does the MODE/SYNC pin affect the operation of the LTC3407EDD-3#TRPBF?
The MODE/SYNC pin on the LTC3407EDD-3#TRPBF selects between three functions: tying to VIN enables Burst Mode® (40μA IQ, higher ripple), tying to GND enables pulse-skipping mode (low-noise, fixed-frequency), and applying a 2.25MHz external clock synchronizes both channels - all explicitly defined in the "FEATURES" and "OPERATION" sections of the datasheet.
What is the purpose of the POR pin on the LTC3407EDD-3#TRPBF, and how is its timing determined?
The POR (Power-On Reset) pin on the LTC3407EDD-3#TRPBF is an open-drain output that pulls low when either output falls >8.5% below regulation and releases after 262,144 oscillator cycles (~117ms at 2.25MHz) once both outputs stabilize - as specified in the "ELECTRICAL CHARACTERISTICS" table (POR Delay = 262,144 Cycles) and "POWER-ON RESET" subsection.
Can the LTC3407EDD-3#TRPBF operate with input voltage below 3.3V?
No, the LTC3407EDD-3#TRPBF has a minimum specified input voltage of 3.3V per the "ABSOLUTE MAXIMUM RATINGS" and "ELECTRICAL CHARACTERISTICS" tables. Operation below 3.3V violates the guaranteed operating range and may cause undervoltage lockout or unstable regulation - the UVLO threshold is approximately 1.65V, but functional operation is only assured from 3.3V to 5.5V.
LTC3407EDD-3#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V, 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 800mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC3407EDD-3#TRPBF FAQ
1.How can I place an order for LTC3407EDD-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3407EDD-3#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 LTC3407EDD-3#TRPBF reliable?
The price and inventory of LTC3407EDD-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3407EDD-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3407EDD-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3407EDD-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3407EDD-3#TRPBF?
LTC3407EDD-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3407EDD-3#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 LTC3407EDD-3#TRPBF?
For technical support, including LTC3407EDD-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3407EDD-3#TRPBF requirements.
6.How does Aetrix verify that LTC3407EDD-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3407EDD-3#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 LTC3407EDD-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3407EDD-3#TRPBF?
All LTC3407EDD-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3407EDD-3#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 LTC3407EDD-3#TRPBF part is unused and in its original packaging.
Return procedure for LTC3407EDD-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3407EDD-3#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
