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Analog Devices Inc. LTC3607IUD#TRPBF
- Part No.:
- LTC3607IUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC3607IUD#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,385
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Product details
Overview
LTC3607IUD#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel monolithic synchronous step-down DC/DC regulator with integrated P- and N-channel MOSFETs, delivering 600mA per channel from a 4.5V–15V input. It features 2.25MHz fixed-frequency operation, 55µA quiescent current, ±1.5% output voltage accuracy, and independent power-good outputs - designed for space-constrained dual-rail systems such as dual Li-ion battery-powered instrumentation and industrial controllers.
For engineers reviewing the LTC3607IUD#TRPBF datasheet, LTC3607IUD#TRPBF pinout, LTC3607IUD#TRPBF application, or LTC3607IUD#TRPBF equivalent, key selection considerations include its dual-output synchronization capability, Burst Mode® vs pulse-skipping mode trade-offs, 3mm × 3mm QFN thermal performance, and 0.6V feedback reference enabling sub-1V outputs.
Technical Context
The LTC3607IUD#TRPBF employs peak current-mode control with shared 2.25MHz clocking across both channels, enabling in-phase switching and precise load transient response. Its architecture integrates internal compensation, independent soft-start timers (≥0.35ms), and overvoltage/undervoltage comparators tied to open-drain PGOOD outputs with 64-cycle blanking.
It supports three operational modes via the MODE/SYNC pin: Burst Mode® (floating or ≥1V) for ultra-low IQ (55µA total), pulse-skipping (grounded) for minimal ripple (~30mVP-P), and external synchronization (1MHz–4MHz). Dropout operation maintains 100% duty cycle with continuous P-MOSFET conduction when VIN approaches VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 15V - supports dual Li-ion (8.4V max) and automotive 12V rail without pre-regulation. |
| Output Current per Channel | 600mA - sufficient for powering microcontrollers, sensors, and interface ICs from each rail. |
| Switching Frequency | 2.25MHz (fixed) - enables use of 1mm-height inductors and compact 10µF ceramic input/output capacitors. |
| Quiescent Current | 55µA total - extends battery runtime in always-on monitoring systems. |
| Feedback Reference Voltage | 0.6V ±1.5% - allows precise setting of low-voltage rails (e.g., 1.2V, 1.8V, 2.5V) with standard resistor dividers. |
| Output Voltage Accuracy | ±1.5% over –40°C to 125°C - ensures stable logic supply margins across industrial temperature range. |
| Shutdown Current | <1µA - meets stringent off-state leakage requirements in energy-harvesting or wake-on-event designs. |
Pinout & Package
Package: 16-lead 3mm × 3mm thermally enhanced plastic QFN (UD package) with exposed PGND pad (Pin 17) requiring PCB soldering for electrical continuity and thermal dissipation (θJA = 68°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE/SYNC (Pin 1) | Mode selection & sync input | Configures light-load behavior (Burst Mode® or pulse-skipping) and accepts external 1–4MHz clock for synchronized multi-rail operation. |
| PGOOD1 / PGOOD2 (Pins 2, 11) | Open-drain power-good indicators | Pull low if respective output deviates >±8.5%; release after 64 clock cycles once regulation is restored - enables sequenced system startup. |
| SVIN (Pin 3) | Supply voltage monitor input | Tracks highest PVIN rail; used for UVLO (3.4–4.3V threshold) and internal bias generation - must be connected to higher of PVIN1/PVIN2. |
| PGND1 / PGND2 / SGND / PGND (Pins 4, 9, 10, 12, 17) | Power and signal ground terminals | Separate high-current PGND paths reduce noise coupling between channels; exposed pad (Pin 17) is mandatory PGND connection for thermal and EMI performance. |
| VFB1 / VFB2 (Pins 14, 15) | Feedback inputs | Monitor divided output voltage against 0.6V reference; enable independent adjustment of each 0.6–VIN output rail. |
| RUN1 / RUN2 (Pins 13, 16) | Enable inputs | Active-high (VIH ≥3.0V); support individual channel shutdown and controlled power sequencing - internal soft-start limits rise time to ≥0.35ms. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables simultaneous 5V/3.3V or 3.3V/1.8V generation on single chip - eliminates need for two discrete converters and reduces BOM count by 40%. |
| Burst Mode® operation | Achieves >90% efficiency at 1mA load with 55µA total IQ - critical for battery-backed real-time clocks and sensor nodes with long idle periods. |
| Internal compensation | Removes requirement for external compensation network - simplifies layout, reduces component count, and guarantees stability with recommended 4.7µH inductors. |
| 100% duty cycle dropout | Maintains regulation down to VIN = VOUT + RDS(ON)_PCH × ILOAD - supports brownout tolerance in automotive cold-crank (6V) scenarios without rail collapse. |
| Thermally enhanced QFN | 3mm × 3mm footprint with exposed PGND pad delivers θJC = 7.5°C/W - sustains 600mA/channel continuous output under 65°C ambient without forced air. |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
Use Scenario: Compact wireless sensor node powered by two series Li-ion cells (6.8–8.4V), requiring isolated 3.3V MCU rail and 1.8V analog front-end rail. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing tightly regulated, low-noise, and independently sequenced power rails with PGOOD confirmation before firmware initialization. Use Value: 55µA quiescent current extends battery life beyond 2 years in sleep mode; 2.25MHz switching avoids AM radio band interference. | Use Scenario: Body control unit in 12V automotive system needing robust 5V microcontroller supply and 3.3V CAN transceiver rail with cold-crank support. IC Role / Device Role / Timing Role: Dual buck converter operating from unregulated vehicle battery (6–16V), delivering fault-tolerant power with independent PGOOD signaling for safety-critical subsystems. Use Value: 100% duty cycle dropout prevents MCU reset during 6V cold-crank; ±1.5% output accuracy ensures CAN transceiver timing compliance. |
| Dual-Rail FPGA I/O Bank | Medical Point-of-Care Analyzer |
Use Scenario: Portable FPGA-based analyzer requiring separate 1.2V core and 2.5V I/O supplies from a single 12V input, with tight cross-regulation and low EMI. IC Role / Device Role / Timing Role: Synchronized dual-channel regulator minimizing beat-frequency noise between rails; in-phase switching reduces input capacitor RMS current. Use Value: Shared 2.25MHz clock eliminates inter-rail switching noise; internal soft-start prevents inrush-induced voltage sag on shared input rail. | Use Scenario: Battery-operated handheld diagnostic device using dual Li-ion (8.4V) input to power 3.3V digital processing and 5.0V precision ADC reference simultaneously. IC Role / Device Role / Timing Role: High-efficiency dual buck supplying noise-sensitive analog circuitry and low-power digital logic with independent enable/control. Use Value: Burst Mode® operation achieves 94% efficiency at 5mA load; ±1.5% output accuracy ensures <0.1% ADC gain error contribution. |
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 2A per channel rating; 3.5V–18V input; no Burst Mode®; requires external compensation. | Better suited for high-current applications (e.g., motor drivers), but lacks ultra-low-IQ mode for battery longevity. | Select TPS65270RGET only when >600mA/channel is required and layout area permits larger inductors/capacitors. |
| MAX20006AATP+T | Automotive AEC-Q100 Grade-1; 3.5V–36V input; 600mA/channel; integrated spread-spectrum; lower 25µA IQ in shutdown. | Designed for harsh environments (–40°C to +125°C ambient); includes watchdog timer and fault reporting not present in LTC3607IUD#TRPBF. | Choose MAX20006AATP+T for automotive under-hood applications requiring AEC-Q100 qualification and extended input range. |
Compared with TPS65270RGET and MAX20006AATP+T, the LTC3607IUD#TRPBF uniquely balances ultra-low quiescent current (55µA), compact 3mm × 3mm QFN packaging, and dual-channel synchronization - making it optimal for portable industrial and medical devices where size, battery life, and noise control are prioritized over extreme input voltage range or automotive qualification.
Availability
LTC3607IUD#TRPBF is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, dual-rail FPGA power systems, and portable medical analyzers requiring stable component supply across production lifecycles.
Supply support for LTC3607IUD#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 and maintains its high-performance power management portfolio with rigorous characterization and long-term product support.
The LTC3607IUD#TRPBF belongs to Linear's monolithic synchronous buck regulator family, engineered specifically for space-constrained, battery-sensitive dual-rail applications demanding high light-load efficiency, precise output accuracy, and robust thermal performance in small QFN packages.
FAQ
What is the maximum junction temperature and thermal resistance of the LTC3607IUD#TRPBF?
The LTC3607IUD#TRPBF has a maximum junction temperature (TJMAX) of 125°C and a thermal resistance of θJA = 68°C/W in the 3mm × 3mm QFN package. The exposed PGND pad (Pin 17) must be soldered to a thermal pad on the PCB to achieve this rating; failure to do so degrades thermal performance and risks premature thermal shutdown under sustained 600mA loads.
How does the MODE/SYNC pin affect light-load efficiency and output ripple in the LTC3607IUD#TRPBF?
The MODE/SYNC pin directly controls the LTC3607IUD#TRPBF's light-load behavior: floating or applying ≥1V selects Burst Mode®, achieving 55µA total IQ and >90% efficiency at 1mA but with ~30mVP-P ripple; grounding selects pulse-skipping mode, reducing ripple to <10mVP-P at the cost of ~20µA higher IQ. This trade-off is hardware-selectable without firmware intervention.
Can the LTC3607IUD#TRPBF operate with different input voltages on PVIN1 and PVIN2?
Yes - the LTC3607IUD#TRPBF supports independent input supplies on PVIN1 and PVIN2. SVIN must be connected to the higher of the two rails (via diode OR-ing if uncertain), as it powers internal bias circuitry and sets the UVLO threshold. This enables flexible power architectures, such as backup battery switchover or mixed-source systems.
What is the minimum output voltage achievable with the LTC3607IUD#TRPBF, and what limits it?
The LTC3607IUD#TRPBF supports output voltages down to 0.6V (its internal reference), but practical minimums are constrained by minimum on-time (~65ns). At 2.25MHz, VOUT(MIN) ≈ 0.146 × VIN(MAX); for VIN = 12V, this yields ~1.75V. Below this, the part enters pulse-skipping mode while maintaining regulation - verified in datasheet Figure 3607 G03.
Does the LTC3607IUD#TRPBF require external compensation components?
No - the LTC3607IUD#TRPBF features fully internal compensation, eliminating external type-II or type-III networks. Stability is guaranteed with standard 4.7µH shielded inductors and 10µF ceramic output capacitors, as validated in the Typical Application Circuit (Figure 3607 TA01a) and confirmed across –40°C to 125°C.
LTC3607IUD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN 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):
- 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)
LTC3607IUD#TRPBF FAQ
1.How can I place an order for LTC3607IUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3607IUD#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 LTC3607IUD#TRPBF reliable?
The price and inventory of LTC3607IUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3607IUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3607IUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3607IUD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3607IUD#TRPBF?
LTC3607IUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3607IUD#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 LTC3607IUD#TRPBF?
For technical support, including LTC3607IUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3607IUD#TRPBF requirements.
6.How does Aetrix verify that LTC3607IUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3607IUD#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 LTC3607IUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3607IUD#TRPBF?
All LTC3607IUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3607IUD#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 LTC3607IUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3607IUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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