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Analog Devices Inc. LTC3607EUD#PBF
- Part No.:
- LTC3607EUD#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC3607EUD#PBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,108
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Product details
Overview
LTC3607EUD#PBF from Analog Devices (formerly Linear Technology) is a dual-channel monolithic synchronous step-down DC/DC regulator delivering 600mA per channel with 2.25MHz fixed switching frequency, 55µA quiescent current, and ±1.5% output voltage accuracy. It operates from 4.5V to 15V input and supports independent 0.6V–VIN adjustable outputs-used in dual Li-ion battery-powered instrumentation requiring compact, high-efficiency dual-rail power.
For engineers reviewing the LTC3607EUD#PBF datasheet, LTC3607EUD#PBF pinout, LTC3607EUD#PBF application, or LTC3607EUD#PBF equivalent, key selection considerations include its Burst Mode® vs pulse-skipping mode trade-off, 16-lead 3mm × 3mm QFN thermal performance (θJA = 68°C/W), dual PGOOD outputs with ±8.5% regulation window, and external frequency synchronization capability (1–4MHz).
Technical Context
The LTC3607EUD#PBF implements peak current-mode control with independent error amplifiers and internal compensation for each channel, enabling fast line/load transient response without external loop components. Its constant-frequency architecture ensures predictable EMI behavior and simplifies filter design.
It features dual P-channel high-side and N-channel low-side synchronous MOSFETs (RDS(ON) = 0.6Ω / 0.25Ω typ), 100% duty-cycle dropout operation, and a shared MODE/SYNC pin that selects between Burst Mode® (for <1µA shutdown IQ and highest light-load efficiency) and pulse-skipping (for lowest output ripple, <30mVP-P typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 15V - supports dual Li-ion (8.4V max), automotive 12V, and industrial 12V rails without pre-regulation. |
| Output Current per Channel | 600mA - sufficient for powering microcontrollers, sensors, and analog front-ends in space-constrained designs. |
| Switching Frequency | 2.25MHz (typ) - enables use of 1mm-height inductors and small ceramic capacitors, reducing board area. |
| Quiescent Current | 55µA total - extends battery life in always-on portable systems such as medical monitors and IoT edge nodes. |
| Feedback Reference Voltage | 0.6V ±1.5% - allows precise low-voltage outputs (e.g., 1.2V, 1.8V, 2.5V, 3.3V, 5V) using standard resistor ratios. |
| Power Good Accuracy | ±8.5% window - provides reliable system-level sequencing and fault detection for FPGA or processor core supplies. |
| Shutdown Current | <1µA - meets ultra-low-power standby requirements in battery-backed real-time clocks and sensor hubs. |
Pinout & Package
Package: 16-lead 3mm × 3mm plastic QFN (UD package) with exposed PGND pad (Pin 17) requiring PCB soldering for thermal and electrical performance (θJA = 68°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE/SYNC (Pin 1) | Mode selection & sync input | Ground = pulse-skipping; floating or ≥1V = Burst Mode®; external 1–4MHz clock = forced sync with automatic pulse-skipping. |
| PGOOD1 (Pin 2) | Channel 1 power-good indicator | Open-drain output pulled low when VOUT1 deviates >±8.5% from setpoint; releases after 64 clock cycles in regulation. |
| SVIN (Pin 3) | Supply voltage reference input | Master supply rail for internal LDOs and bias circuitry; must be connected to higher of PVIN1/PVIN2 or via diodes. |
| PGND1 (Pin 4) | Channel 1 power ground | Return path for PVIN1, SW1, and CIN1; must be tied to SGND and exposed pad for low-noise operation. |
| SW1 (Pin 5) | Channel 1 switch node | Connects to inductor; switches between PVIN1 and PGND1; requires tight layout to minimize EMI and ringing. |
| PVIN1 (Pin 6) | Channel 1 primary input | High-side MOSFET source connection; accepts up to 15V; decoupled with ≥10µF ceramic capacitor. |
| PVIN2 (Pin 7) | Channel 2 primary input | Independent input rail for second converter; enables dual-input systems (e.g., backup battery + main supply). |
| SW2 (Pin 8) | Channel 2 switch node | Identical function to SW1 but for second channel; requires separate inductor and output filter. |
| PGND2 (Pin 9) | Channel 2 power ground | Return path for PVIN2, SW2, and CIN2; must be joined to SGND and exposed pad at single point. |
| SGND (Pin 10) | Signal ground reference | Analog ground for VFB1/VFB2, RUN1/RUN2, and MODE/SYNC; must be star-connected to PGND at single point. |
| PGOOD2 (Pin 11) | Channel 2 power-good indicator | Functionally identical to PGOOD1 but for VOUT2; enables independent monitoring of dual supplies. |
| VFB2 (Pin 14) | Channel 2 feedback input | Connects to resistor divider on VOUT2; 0.6V reference sets output voltage; sensitive to noise-requires short, shielded trace. |
| RUN2 (Pin 13) | Channel 2 enable input | Active-high (≥3.0V); internal soft-start limits rise time to ≥0.35ms; can be driven by 3.3V logic or SVIN. |
| VFB1 (Pin 15) | Channel 1 feedback input | Same function as VFB2 but for VOUT1; accuracy directly determines output regulation tolerance. |
| RUN1 (Pin 16) | Channel 1 enable input | Active-high (≥3.0V); independent control enables staggered startup or dynamic power gating per rail. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent soft-start | Each channel has dedicated internal soft-start (0.35ms min), preventing inrush current and enabling controlled power-up sequencing. |
| Synchronous rectification | Integrated P-channel high-side and N-channel low-side MOSFETs eliminate need for external Schottky diodes, improving efficiency by ~5–8% at medium loads. |
| External frequency synchronization | Accepts 1–4MHz external clock on MODE/SYNC pin, allowing EMI reduction via spread-spectrum or alignment with system clock domains. |
| Low-dropout 100% duty cycle | Enables operation down to VOUT = VIN – (IOUT × RDS(ON)), critical for maintaining regulation during brownout or battery discharge. |
| Independent PGOOD outputs | Two open-drain status flags allow discrete monitoring of each output's regulation window (±8.5%), supporting fault-tolerant system supervision. |
Applications
| Industrial Sensor Node | Automotive Infotainment Core Supply |
|---|---|
Use Scenario: Compact wireless sensor node powered by two series Li-ion cells (6–8.4V), requiring isolated 3.3V for MCU and 1.8V for RF transceiver. IC Role / Device Role / Timing Role: Dual-output buck regulator providing tightly regulated, low-noise rails with independent enable and PGOOD signaling for firmware-controlled power management. Use Value: 55µA quiescent current extends battery life beyond 1 year in sleep mode; 2.25MHz switching avoids AM radio band interference. | Use Scenario: Head unit supplying 5V for display interface and 3.3V for audio codec, operating from 12V vehicle battery with cold-crank tolerance down to 4.5V. IC Role / Device Role / Timing Role: Dual synchronous buck converter delivering stable, sequenced power with PGOOD-driven reset assertion before processor boot. Use Value: Wide 4.5–15V input range survives load-dump and cranking events; ±1.5% output accuracy ensures reliable ADC reference and digital logic margins. |
| Dual-Rail FPGA Development Board | Medical Point-of-Care Diagnostic Module |
Use Scenario: FPGA evaluation platform needing 1.2V core and 2.5V I/O rails from 12V input, with minimal board area and thermal budget. IC Role / Device Role / Timing Role: Monolithic dual buck IC replacing two discrete regulators, reducing component count and layout complexity while enabling synchronized switching. Use Value: 3mm × 3mm QFN footprint saves >40% PCB area vs discrete solutions; internal compensation eliminates 4 external compensation parts per channel. | Use Scenario: Portable ultrasound probe requiring ultra-low-noise 3.3V analog supply and 1.2V digital supply, with strict battery runtime and EMI constraints. IC Role / Device Role / Timing Role: Dual low-IQ buck regulator operating in Burst Mode® during standby and pulse-skipping during imaging bursts. Use Value: <30mVP-P ripple in pulse-skipping mode ensures clean analog signal chain; <1µA shutdown current preserves charge during transport. |
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 |
|---|---|---|---|
| TPS65270RGET | Higher 3A per channel rating; 2.2MHz fixed frequency; requires external compensation; no Burst Mode®. | Better suited for high-current industrial PLC I/O modules than low-power portable devices. | Select TPS65270RGET only if >1A/channel output or external loop tuning is required; not drop-in due to different pinout and compensation scheme. |
| ISL8026IRZ | 600mA per channel; 2.5MHz switching; 30µA IQ; no MODE/SYNC pin; fixed PFM mode only. | Optimized for lowest possible quiescent current in always-on applications, but lacks ripple/noise trade-off flexibility. | Choose ISL8026IRZ when minimizing standby power is absolute priority and fixed low-ripple operation is acceptable; differs in pin assignment and lack of sync capability. |
Compared with TPS65270RGET and ISL8026IRZ, the LTC3607EUD#PBF uniquely balances ultra-low IQ, flexible light-load mode selection, and integrated compensation in a thermally optimized QFN-making it optimal for space- and battery-limited dual-rail systems where design simplicity and runtime are critical.
Availability
LTC3607EUD#PBF is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive infotainment subsystems, and portable medical diagnostics requiring stable component supply across extended temperature ranges (–40°C to 125°C).
Supply support for LTC3607EUD#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 maintains its precision power management portfolio with rigorous qualification and long-term product support.
The LTC3607EUD#PBF belongs to Linear's high-efficiency monolithic DC/DC regulator family, designed specifically for dual-rail battery-powered and automotive applications demanding low quiescent current, small solution size, and robust transient performance.
FAQ
What is the maximum input voltage the LTC3607EUD#PBF can handle?
The LTC3607EUD#PBF supports an absolute maximum input voltage of 15V on PVIN1, PVIN2, and SVIN pins. Its recommended operating input range is 4.5V to 15V, making it suitable for dual Li-ion battery packs (up to 8.4V), 12V automotive systems, and industrial 12V rails. Exceeding 15V risks permanent damage per Absolute Maximum Ratings.
Does the LTC3607EUD#PBF require external compensation components?
No, the LTC3607EUD#PBF features fully internal compensation for both channels, eliminating the need for external Type-II or Type-III compensation networks. This reduces BOM count, saves PCB area, and simplifies design-especially beneficial for compact, cost-sensitive applications like portable instrumentation and wearables.
How does the MODE/SYNC pin affect light-load efficiency and output ripple in the LTC3607EUD#PBF?
When the MODE/SYNC pin is grounded, the LTC3607EUD#PBF operates in pulse-skipping mode, delivering lowest output ripple (<30mVP-P typical) at the expense of slightly lower light-load efficiency. When floated or pulled ≥1V, it enters Burst Mode®, achieving highest efficiency (55µA IQ) but with higher ripple. The pin also accepts 1–4MHz external clocks for synchronization.
Can the LTC3607EUD#PBF operate with different input voltages on PVIN1 and PVIN2?
Yes-the LTC3607EUD#PBF supports independent input rails: PVIN1 powers Channel 1 and PVIN2 powers Channel 2. SVIN must be connected to the higher of the two inputs (or via diodes if polarity/level is uncertain). This enables flexible architectures such as primary battery + backup supercapacitor or isolated domain supplies.
What thermal considerations apply to the LTC3607EUD#PBF in high-current operation?
The LTC3607EUD#PBF uses a 3mm × 3mm QFN with exposed PGND pad (Pin 17), rated at θJA = 68°C/W. To maintain junction temperature ≤125°C at 600mA per channel, ensure ≥1.5cm² copper pour under the exposed pad, multiple thermal vias to inner ground planes, and avoid enclosing the device in sealed enclosures without airflow.
LTC3607EUD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN 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):
- 4.5V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 15V
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
LTC3607EUD#PBF FAQ
1.How can I place an order for LTC3607EUD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3607EUD#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 LTC3607EUD#PBF reliable?
The price and inventory of LTC3607EUD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3607EUD#PBF is usually 5 days.
3.What payment methods are accepted for LTC3607EUD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3607EUD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3607EUD#PBF?
LTC3607EUD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3607EUD#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 LTC3607EUD#PBF?
For technical support, including LTC3607EUD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3607EUD#PBF requirements.
6.How does Aetrix verify that LTC3607EUD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3607EUD#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 LTC3607EUD#PBF meets industry standards.
7.What is the process for return or replacement of LTC3607EUD#PBF?
All LTC3607EUD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3607EUD#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 LTC3607EUD#PBF part is unused and in its original packaging.
Return procedure for LTC3607EUD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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