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Analog Devices Inc. LTC3607EMSE#PBF
- Part No.:
- LTC3607EMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3607EMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:138
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Product details
Overview
LTC3607EMSE#PBF from Analog Devices (formerly Linear Technology) is a dual-channel monolithic synchronous step-down DC/DC regulator delivering 600mA per channel from 4.5V to 15V input, with 2.25MHz fixed switching frequency, 55µA quiescent current, and ±1.5% output voltage accuracy-used in dual Li-ion battery-powered instrumentation requiring compact, high-efficiency dual-rail power.
For engineers reviewing the LTC3607EMSE#PBF datasheet, LTC3607EMSE#PBF pinout, LTC3607EMSE#PBF application, or LTC3607EMSE#PBF equivalent, key selection considerations include independent soft-start, Burst Mode™ vs pulse-skipping mode selection via MODE/SYNC pin, PGOOD outputs with ±8.5% regulation window, and thermal performance in the 16-lead MSOP package with exposed PGND pad.
Technical Context
The LTC3607EMSE#PBF implements peak current-mode control with two independent 2.25MHz synchronous buck regulators sharing a common clock and operating in-phase. Each channel features internal compensation, 0.6V reference, and programmable light-load behavior via the MODE/SYNC pin-Burst Mode™ for ultra-low IQ or pulse-skipping for minimal ripple.
It supports independent enable (RUN1/RUN2), separate feedback (VFB1/VFB2), and dedicated power-good outputs (PGOOD1/PGOOD2) with 64-cycle blanking. Input supplies are split across PVIN1/PVIN2/SVIN, enabling flexible sourcing from asymmetric rails or diode-OR configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 15V - supports dual Li-ion (8.4V max) and 12V industrial rails without external pre-regulation. |
| Output Current per Channel | 600mA - sufficient for powering microcontrollers, sensors, and analog front-ends in portable systems. |
| Switching Frequency | 2.25MHz (±25%) - enables use of 1mm-height inductors and small ceramic capacitors for space-constrained layouts. |
| Quiescent Current | 55µA total - extends battery runtime in always-on monitoring applications with both channels active at light load. |
| Feedback Reference Voltage | 0.6V ±1.5% - allows precise low-voltage outputs (e.g., 1.2V, 1.8V, 3.3V, 5V) using standard resistor ratios. |
| Power Good Threshold | ±8.5% window - provides reliable rail sequencing and fault detection without external comparators. |
| Shutdown Current | <1µA - ensures negligible battery drain during system sleep or storage modes. |
Pinout & Package
Package: 16-lead plastic MSOP (3mm × 4.9mm) with exposed PGND pad (Pin 17), rated θJA = 37°C/W, suitable for moderate-power density PCBs without thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE/SYNC (Pin 15) | Mode selection & sync input | Floating or ≥1V enables Burst Mode™; grounded selects pulse-skipping; external 1–4MHz clock synchronizes switching. |
| PGOOD1 (Pin 16) | Channel 1 power-good output | Open-drain signal pulled low if VOUT1 deviates >±8.5%; releases after 64 cycles once regulated. |
| SVIN (Pin 1) | Supply voltage monitor input | Tracks highest of PVIN1/PVIN2; enables UVLO (3.4V–4.3V) and powers internal LDOs and bias circuitry. |
| PGND1 (Pin 2) | Channel 1 power ground | Return path for SW1 current and COUT1; must connect to local high-current ground plane. |
| SW1 (Pin 3) | Channel 1 switch node | Connects to inductor; swings between PVIN1 and PGND1; requires tight layout to minimize EMI and ringing. |
| PVIN1 (Pin 4) | Channel 1 high-side supply | Primary input for Regulator 1; decoupled with 10µF ceramic capacitor near pin. |
| PVIN2 (Pin 5) | Channel 2 high-side supply | Independent input for Regulator 2; enables dual-input operation (e.g., backup battery or auxiliary rail). |
| SW2 (Pin 6) | Channel 2 switch node | Connects to second inductor; identical timing and drive as SW1 but electrically isolated. |
| PGND2 (Pin 7) | Channel 2 power ground | Return path for SW2 current and COUT2; kept separate from PGND1 until joined at single-point PGND. |
| SGND (Pin 8) | Signal ground | Analog reference for VFB1/VFB2, RUN1/RUN2, and MODE/SYNC; routed separately from PGND to avoid noise coupling. |
| PGOOD2 (Pin 9) | Channel 2 power-good output | Independent open-drain status flag with same timing and threshold as PGOOD1. |
| RUN1 (Pin 14) | Channel 1 enable input | Active-high (VIH ≥3.0V); internal 0.35ms soft-start prevents inrush; compatible with 3.3V logic. |
| VFB1 (Pin 13) | Channel 1 feedback input | Compares resistive divider output to 0.6V reference; sets VOUT1 = 0.6V × (1 + R1/R2). |
| VFB2 (Pin 12) | Channel 2 feedback input | Identical function to VFB1; enables independent output voltage programming (e.g., 3.3V + 1.8V). |
| RUN2 (Pin 11) | Channel 2 enable input | Matches RUN1 timing and logic thresholds; allows staggered or simultaneous channel startup. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent soft-start | 0.35ms internal ramp per channel prevents input voltage droop and output overshoot during power-up. |
| Burst Mode™ operation | Reduces total IQ to 55µA at light loads while maintaining regulation-critical for battery longevity in sensor nodes. |
| 100% duty cycle dropout | P-channel MOSFET remains fully on when VIN ≈ VOUT, sustaining output down to (VIN − RDS(ON)×ILOAD) without shutdown. |
| External frequency synchronization | Accepts 1–4MHz clock on MODE/SYNC pin to eliminate beat frequencies in multi-regulator systems. |
| Internal compensation | Eliminates need for external compensation network-reduces BOM count and layout sensitivity. |
Applications
| Industrial Sensor Node | Automotive Infotainment Display |
|---|---|
Use Scenario: Compact wireless temperature/humidity sensor powered by two series Li-ion cells (6–8.4V), transmitting data every 5 seconds. IC Role / Device Role / Timing Role: Dual-rail power manager generating 3.3V for MCU/radio and 1.8V for sensor interface, with Burst Mode™ active between transmissions. Use Value: 55µA quiescent current extends battery life beyond 2 years; PGOOD flags ensure clean wake-up and data integrity. | Use Scenario: TFT-LCD backlight and touch controller subsystem in automotive head unit, supplied from 12V battery with transient protection. IC Role / Device Role / Timing Role: Primary DC/DC converter delivering 5V@600mA (backlight driver) and 3.3V@600mA (touch IC), synchronized to system clock via MODE/SYNC. Use Value: 2.25MHz operation avoids AM radio band; independent RUN pins allow display dimming without resetting touch firmware. |
| Dual-Rail FPGA Development Board | Medical Point-of-Care Analyzer |
Use Scenario: Low-cost FPGA evaluation platform requiring stable 1.2V core and 3.3V I/O rails from 12V adapter input. IC Role / Device Role / Timing Role: Single-chip dual-buck solution replacing discrete regulators; uses pulse-skipping mode for low-noise 1.2V core supply. Use Value: Eliminates 4 external MOSFETs, 2 Schottky diodes, and 2 compensation networks-reducing board area by >30%. | Use Scenario: Portable blood glucose meter with OLED display and electrochemical sensor, powered by single Li-ion cell (3–4.2V) boosted to 5V then stepped down. IC Role / Device Role / Timing Role: Secondary regulator generating precision 3.3V analog reference and 1.8V digital rail from intermediate 5V bus. Use Value: ±1.5% output accuracy ensures ADC linearity; <1µA shutdown current meets IEC 62304 standby requirements. |
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 |
|---|---|---|---|
| TPS65270RGET | Higher 3A per channel, 2.2MHz, but 100µA IQ and no Burst Mode™; requires external compensation. | Targeted at higher-power applications like motor drivers; lacks ultra-low-IQ capability for battery-critical designs. | Select only when >1A/channel output or adjustable frequency (0.5–2.2MHz) is required; not drop-in due to different pinout and compensation. |
| MAX20004AATP+T | Automotive-grade AEC-Q100, 600mA/channel, 2.1MHz, 28µA IQ, but fixed 3.3V/5V outputs and no independent RUN/PGOOD. | Designed for infotainment head units with strict qualification; lacks programmability and flexibility for custom voltage rails. | Choose for automotive production where qualification and long-term supply are mandatory; not suitable for prototyping or non-automotive use. |
Compared with TPS65270RGET and MAX20004AATP+T, the LTC3607EMSE#PBF uniquely balances ultra-low quiescent current, full programmability, and dual independent control-making it optimal for portable, battery-sensitive, and development-stage dual-rail systems where flexibility and efficiency are prioritized over automotive qualification or raw current capacity.
Availability
LTC3607EMSE#PBF is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive display subsystems, FPGA development platforms, and medical point-of-care analyzers requiring stable component supply with guaranteed long-term availability.
Supply support for LTC3607EMSE#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 legacy of high-performance power management ICs with rigorous characterization and application support.
The LTC3607EMSE#PBF belongs to Linear's monolithic synchronous buck regulator product line, designed specifically for space-constrained, battery-powered systems demanding dual independent rails, ultra-low IQ, and robust transient response.
FAQ
What is the maximum junction temperature rating for the LTC3607EMSE#PBF?
The LTC3607EMSE#PBF has a maximum junction temperature (TJMAX) of 125°C, with thermal resistance θJA = 37°C/W in the MSOP package. Operation above this limit triggers overtemperature protection, and continuous operation beyond 125°C may impair reliability. The device is specified for –40°C to 125°C operating junction temperature range, with the E-grade validated from 0°C to 85°C and assured over full range by design and correlation.
Can the LTC3607EMSE#PBF operate with only one channel enabled?
Yes, the LTC3607EMSE#PBF supports independent channel control: RUN1 and RUN2 are separate inputs, allowing Channel 1 to remain active while Channel 2 is disabled (or vice versa). When only one channel operates, quiescent current drops to 35µA (typical), and the disabled channel draws <1µA in shutdown-enabling dynamic power partitioning in adaptive systems.
Does the LTC3607EMSE#PBF require external Schottky diodes?
No, the LTC3607EMSE#PBF integrates synchronous P-channel and N-channel MOSFETs for each channel, eliminating the need for external Schottky diodes. This improves efficiency-especially at light loads-and reduces component count, PCB area, and thermal complexity compared to asynchronous buck converters.
How does the MODE/SYNC pin affect light-load efficiency and output ripple in the LTC3607EMSE#PBF?
When the MODE/SYNC pin is floating or ≥1V, the LTC3607EMSE#PBF enters Burst Mode™, reducing quiescent current to 55µA and achieving up to 96% efficiency at light loads-but with typical 30mVP-P output ripple. When grounded, it switches to pulse-skipping mode, lowering ripple to <10mVP-P at the cost of ~5–10% lower light-load efficiency due to higher switching losses.
What is the purpose of the SVIN pin on the LTC3607EMSE#PBF?
The SVIN pin on the LTC3607EMSE#PBF serves as the master supply voltage monitor and bias source-it must be connected to the higher of PVIN1 or PVIN2 (via external diodes if uncertain) to ensure proper UVLO (3.4V–4.3V), internal LDO operation, and accurate reference generation. It does not supply output current but enables stable startup and protection across asymmetric input configurations.
LTC3607EMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (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):
- 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-MSOP-EP
LTC3607EMSE#PBF FAQ
1.How can I place an order for LTC3607EMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3607EMSE#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 LTC3607EMSE#PBF reliable?
The price and inventory of LTC3607EMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3607EMSE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3607EMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3607EMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3607EMSE#PBF?
LTC3607EMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3607EMSE#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 LTC3607EMSE#PBF?
For technical support, including LTC3607EMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3607EMSE#PBF requirements.
6.How does Aetrix verify that LTC3607EMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3607EMSE#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 LTC3607EMSE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3607EMSE#PBF?
All LTC3607EMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3607EMSE#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 LTC3607EMSE#PBF part is unused and in its original packaging.
Return procedure for LTC3607EMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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