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Analog Devices Inc. LTC3602EFE#TRPBF
- Part No.:
- LTC3602EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3602EFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2.5A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,103
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Product details
Overview
LTC3602EFE#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC converter delivering up to 2.5A at adjustable output voltages from 0.6V to 9.5V, operating from 4.5V–10V input. It integrates 65mΩ top and 90mΩ bottom N-channel MOSFETs, supports 300kHz–3MHz programmable switching frequency, and features OPTI-LOOP® compensation for optimized transient response in point-of-load power supplies.
For engineers reviewing the LTC3602EFE#TRPBF datasheet, LTC3602EFE#TRPBF pinout, LTC3602EFE#TRPBF application, or LTC3602EFE#TRPBF equivalent, key selection considerations include its 16-lead exposed TSSOP package with thermal pad, Burst Mode® operation for light-load efficiency, PGOOD monitoring, TRACK/SS for voltage sequencing, and compatibility with ceramic output capacitors in space-constrained industrial and portable systems.
Technical Context
The LTC3602EFE#TRPBF uses constant-frequency current-mode control with internal slope compensation active above 30% duty cycle to prevent subharmonic oscillation. Its main control loop regulates output by adjusting peak inductor current via the ITH pin, referenced to a 0.6V ±1% internal bandgap.
It supports three operational modes selected via SYNC/MODE pin: forced continuous conduction (for low-noise applications), Burst Mode® (for high light-load efficiency), and pulse-skipping (via grounded SYNC/MODE). Overtemperature protection shuts down both switches at ~150°C and auto-restarts below 115°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 10V - supports single-cell Li-ion, 5V rail, and intermediate bus architectures without external pre-regulation. |
| Output Current | Up to 2.5A - sufficient for FPGA core rails, DSP processors, and ASIC I/O supplies. |
| Switch RDS(ON) | 65mΩ (top), 90mΩ (bottom) - enables >95% peak efficiency at 3.3V/2.5A with minimal external heat sinking. |
| Quiescent Current | 75μA in Burst Mode - extends battery life in always-on portable instrumentation. |
| Feedback Reference | 0.6V ±1% - allows precise low-voltage regulation down to 0.6V with standard resistor dividers. |
| Switching Frequency | 300kHz to 3MHz - selectable via RT resistor or external clock sync; higher frequencies reduce inductor/capacitor size. |
| Power Good Output | Open-drain PGOOD with ±10% window - provides system-level power sequencing and fault detection. |
Pinout & Package
Package: 16-lead plastic TSSOP with exposed thermal pad (Pin 17 = SGND), rated for –40°C to +85°C ambient operation. θJA = 38°C/W; requires PCB soldering of exposed pad for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC/MODE (Pin 1) | Mode select & sync input | Configures Burst Mode®, forced CCM, or external clock sync; voltage level sets burst clamp threshold. |
| PGOOD (Pin 2) | Power good monitor | Open-drain output pulled low if VOUT deviates >±10% - used for processor reset or system enable sequencing. |
| RT (Pin 3) | Oscillator timing | Resistor-to-ground sets switching frequency; supports 300kHz–3MHz range with linear scaling. |
| ITH (Pin 4) | Error amplifier output | Compensation node for loop stability; connects to RC network for OPTI-LOOP® tuning across load/capacitor variations. |
| VFB (Pin 5) | Feedback input | Monitors resistive divider output; regulates VOUT to 0.6V reference - enables precision output programming. |
| RUN (Pin 6) | Enable control | Active-high logic input; ≥0.7V enables regulator; can be tied to PVIN for always-on operation. |
| TRACK/SS (Pin 7) | Tracking/soft-start | Accepts external ramp for voltage tracking (e.g., core/I/O sequencing) or capacitor for programmable soft-start. |
| PGND (Pins 8–10) | Power ground | Low-impedance return path for high di/dt switch currents - must be connected to solid ground plane under IC. |
| SW (Pins 11–13) | Switch node | Connects to inductor; carries high-frequency square wave - requires short, low-inductance layout to minimize EMI. |
| BOOST (Pin 14) | Bootstrap supply | Charges floating gate driver for top MOSFET; requires 0.1μF ceramic capacitor between BOOST and SW. |
| PVIN (Pin 15) | Main power input | 4.5V–10V supply input; requires local 10μF+ ceramic decoupling to PGND near pin. |
| INTVCC (Pin 16) | Internal LDO output | 5.0V ±2% regulated supply for internal circuitry; powers RUN, SYNC/MODE, and feedback circuits. |
| SGND (Pin 17) | Signal ground | Reference for analog circuitry (VFB, ITH, TRACK/SS); must be connected to PCB ground plane under exposed pad. |
Key Features
| Feature | Design Value |
|---|---|
| OPTI-LOOP® Compensation | Allows stable loop response across wide output capacitor ESR ranges (1mΩ–100mΩ) and load currents (1mA–2.5A) without redesign. |
| Adjustable Burst Clamp | External control of minimum peak inductor current (0A–3.5A) via SYNC/MODE voltage enables precise ripple/noise/efficiency trade-off. |
| Synchronous Power Switches | Integrated 65mΩ/90mΩ MOSFETs eliminate external Schottky diode, reducing BOM count and improving efficiency at all loads. |
| 99% Maximum Duty Cycle | Enables ultra-low dropout operation (e.g., 3.3V out from 3.6V input) by forcing top switch on for multiple cycles with periodic bottom-switch refresh. |
| Overtemperature Protection | Thermal shutdown at ~150°C with hysteresis (restart at ~115°C) prevents permanent damage during sustained overload or poor heatsinking. |
Applications
| Point-of-Load Supplies | Portable Instruments |
|---|---|
Use Scenario: Regulating 1.2V/2A for an FPGA core rail on a dense PCB with limited board area and strict thermal constraints. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise core voltage with fast transient response. Use Value: OPTI-LOOP® ensures stability with small ceramic output caps; 65mΩ RDS(ON) minimizes self-heating; 16-pin TSSOP fits tight layouts. | Use Scenario: Powering a handheld multimeter with dual rails (3.3V microcontroller, 5V display backlight) from a single Li-ion cell. IC Role / Device Role / Timing Role: Main step-down converter enabling battery-powered operation with extended runtime via 75μA Burst Mode quiescent current. Use Value: Adjustable burst clamp reduces output ripple while maintaining >85% efficiency at 10mA load; PGOOD confirms rail readiness before display initialization. |
| Server Backplane Power | Battery-Powered Devices |
Use Scenario: Generating 5V/2A for hot-swap controller and management ASICs on a telecom backplane with 8.4V intermediate bus. IC Role / Device Role / Timing Role: High-efficiency intermediate converter supporting dynamic load steps and robust fault reporting. Use Value: Synchronizable switching frequency avoids beat frequencies with other converters; PGOOD and TRACK/SS support safe power-up sequencing across distributed modules. | Use Scenario: Supplying 3.3V/2.5A to a wireless sensor node with intermittent RF transmission bursts and long sleep intervals. IC Role / Device Role / Timing Role: Primary power stage managing deep-sleep wake-up transients and minimizing average current draw. Use Value: Forced continuous mode suppresses switching noise during RF receive; Burst Mode resumes automatically during sleep to cut IQ to 75μA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54227PWPR | Lower max output current (2A vs 2.5A); fixed 500kHz frequency; no Burst Mode®; 14-pin HTSSOP package. | Lacks adjustable light-load efficiency mode and voltage tracking - less suitable for battery-critical or multi-rail sequencing designs. | Choose when fixed-frequency simplicity and TI's ecosystem support outweigh need for burst optimization and TRACK/SS functionality. |
| MP2307DN-LF-Z | 2A rating; 300kHz–2MHz frequency range; no PGOOD or TRACK/SS; 8-pin SOIC package; higher RDS(ON) (110mΩ/140mΩ). | Missing critical system-monitoring features (PGOOD) and sequencing capability (TRACK/SS); lower efficiency at full load. | Select for cost-sensitive, non-sequencing applications where 2A output and basic regulation suffice and footprint is constrained to SOIC-8. |
Compared with TPS54227PWPR and MP2307DN-LF-Z, the LTC3602EFE#TRPBF delivers higher output current, integrated voltage tracking/sequencing, and configurable Burst Mode® for superior efficiency across dynamic load profiles - making it optimal for precision, multi-rail, and battery-sensitive systems.
Availability
LTC3602EFE#TRPBF is available at Aetrix Electronics and suitable for point-of-load supplies, portable instrumentation, and server backplane power requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance over –40°C to +85°C.
Supply support for LTC3602EFE#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 legacy of high-performance power management ICs with rigorous characterization and application-focused design.
The LTC3602EFE#TRPBF belongs to Linear's monolithic synchronous buck regulator product line, engineered for high-efficiency, low-noise, and thermally robust point-of-load conversion in space- and power-constrained systems.
FAQ
What is the maximum output current capability of the LTC3602EFE#TRPBF?
The LTC3602EFE#TRPBF delivers up to 2.5A of continuous output current when properly heatsinked using its exposed thermal pad. This rating assumes operation within the specified input voltage range (4.5V–10V), ambient temperature ≤85°C, and adequate PCB copper area per the datasheet layout guidelines. Peak current limit is 4.5A, but sustained 2.5A output requires thermal management to maintain junction temperature below 125°C.
Does the LTC3602EFE#TRPBF support output voltage tracking for multi-rail systems?
Yes, the LTC3602EFE#TRPBF supports voltage tracking via its TRACK/SS pin (Pin 7). Applying a ramp voltage to this pin causes the output to follow that ramp until it reaches 0.6V, after which regulation transitions to the internal reference. This enables precise sequencing between core and I/O rails in FPGAs, microprocessors, and DSPs - preventing latch-up and ensuring safe power-up order without external controllers.
How is switching frequency set on the LTC3602EFE#TRPBF?
Switching frequency on the LTC3602EFE#TRPBF is set either by connecting a resistor between the RT pin (Pin 3) and ground, or by applying an external clock signal to the SYNC/MODE pin (Pin 1). With RT, frequency scales linearly from 300kHz to 3MHz; for synchronization, the external clock must be 300kHz–3MHz, and the RT resistor should be chosen for ~25% lower nominal frequency to ensure lock.
What protection features does the LTC3602EFE#TRPBF include?
The LTC3602EFE#TRPBF integrates overtemperature shutdown (trip at ~150°C, restart at ~115°C), overvoltage/undervoltage protection (via PGOOD monitoring ±10%), short-circuit current limiting (secondary 4.5A valley-current limit), and INTVCC undervoltage lockout (4.2V with 700mV hysteresis). These features operate autonomously without external components to safeguard both the IC and downstream circuitry.
Can the LTC3602EFE#TRPBF operate with ceramic output capacitors?
Yes, the LTC3602EFE#TRPBF is fully compatible with ceramic output capacitors and benefits from their low ESR. Its OPTI-LOOP® compensation architecture maintains stability across a wide range of ceramic capacitor values and ESR (1mΩ–100mΩ), eliminating the need for electrolytic or tantalum types. Layout best practices - including short traces, local grounding, and proper BOOST capacitor placement - are essential to avoid ringing.
LTC3602EFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 9.5V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
LTC3602EFE#TRPBF FAQ
1.How can I place an order for LTC3602EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3602EFE#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 LTC3602EFE#TRPBF reliable?
The price and inventory of LTC3602EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3602EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3602EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3602EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3602EFE#TRPBF?
LTC3602EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3602EFE#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 LTC3602EFE#TRPBF?
For technical support, including LTC3602EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3602EFE#TRPBF requirements.
6.How does Aetrix verify that LTC3602EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3602EFE#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 LTC3602EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3602EFE#TRPBF?
All LTC3602EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3602EFE#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 LTC3602EFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3602EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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