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Analog Devices Inc. LTC3536EDD#TRPBF
- Part No.:
- LTC3536EDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3536EDD#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,175
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Product details
Overview
LTC3536EDD#TRPBF from Analog Devices (formerly Linear Technology) is a synchronous 4-switch buck-boost DC/DC converter delivering up to 1A continuous output current with ±1% output voltage accuracy, 1.8V–5.5V input/output range, and programmable 300kHz–2MHz switching frequency. It operates seamlessly across buck, boost, and buck-boost modes-ideal for RF power supplies and precision portable instrumentation where input voltage may dip below or rise above the regulated output.
For engineers reviewing the LTC3536EDD#TRPBF datasheet, LTC3536EDD#TRPBF pinout, LTC3536EDD#TRPBF application, or LTC3536EDD#TRPBF equivalent, key selection criteria include its low-noise architecture, 32µA Burst Mode quiescent current, internal soft-start, output disconnect in shutdown, and compatibility with 3mm × 3mm DFN packaging for space-constrained designs.
Technical Context
The LTC3536EDD#TRPBF implements a proprietary 4-switch topology with two integrated P-channel and two N-channel MOSFETs, enabling continuous regulation when VIN < VOUT, VIN > VOUT, or VIN ≈ VOUT without mode transition artifacts. Its voltage-mode control loop uses an internal error amplifier (90dB gain) with external Type III compensation via VC–FB network.
Switching is governed by a resistor-programmable oscillator (RT pin) or external synchronization via MODE/SYNC pin (0.3–2MHz), while dual current limiting-input limit (2.5A typ.) and peak switch limit (3.4A typ.)-protects against overload and short-circuit faults. Reverse current limiting (0.55A typ.) actively disables SW2 during forced reverse conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, NiMH, or supercapacitor inputs without pre-regulation. |
| Output Voltage Range | 1.8V to 5.5V - adjustable via FB divider; fixed 3.3V typical in reference designs. |
| Continuous Output Current | 1A at VIN ≥ 3V, VOUT = 3.3V - derates at extreme step-up/down ratios due to inductor current constraints. |
| Quiescent Current (Burst Mode) | 32µA - extends battery runtime in standby for handheld medical or wireless sensors. |
| Switching Frequency | 300kHz–2MHz - set by RT resistor or synchronized externally; default 1.2MHz when RT tied to VIN. |
| Feedback Reference Voltage | 0.6V ±1% - enables precise output setting with minimal divider error sensitivity. |
| Shutdown Current | 1µA - ensures near-zero drain during system sleep states. |
| Thermal Shutdown Threshold | 125°C - protects device under sustained overload or poor PCB thermal design. |
Pinout & Package
The LTC3536EDD#TRPBF is housed in a thermally enhanced 10-pin (3mm × 3mm) plastic DFN package with exposed PGND pad (Pin 11) requiring solder connection to PCB ground plane for optimal thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RT (Pin 1) | Oscillator frequency programming | Resistor-to-GND sets fSW = 100/RT (kΩ); tie to VIN for 1.2MHz default. |
| SGND (Pin 2) | Analog ground reference | Separate Kelvin return for FB/VC; must be isolated from high-current PGND paths. |
| MODE/SYNC (Pin 3) | Operation mode control & sync input | Logic 0 = PWM; logic 1 = Burst Mode; external clock input (0.3–2MHz) for EMI reduction. |
| SW1 (Pin 4) | High-side switch node | Connects to one end of buck-boost inductor; carries bidirectional current in all operating modes. |
| SW2 (Pin 5) | Low-side switch node | Connects to other end of inductor; critical for minimizing layout-induced ringing and noise. |
| VOUT (Pin 6) | Regulated power output | Requires low-ESR ceramic capacitor (≥22µF) placed adjacent to pin with short ground return. |
| VIN (Pin 7) | Main power input | Accepts 1.8–5.5V; requires ≥10µF low-ESR bypass cap close to pin with minimal trace inductance. |
| SHDN (Pin 8) | Enable/disable control | Active-high; pulls total supply current to ≤1µA in shutdown with output disconnected. |
| FB (Pin 9) | Feedback voltage sensing | Monitors resistive divider; regulates VOUT = 0.6V × (1 + RTOP/RBOT) with 50nA input bias. |
| VC (Pin 10) | Error amplifier output | Connects to external Type III compensation network (RFF, CFF, CPOLE, CFB) for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost mode transitions | Eliminates output transients and subharmonics during VIN crossing VOUT-critical for RF-sensitive loads. |
| Low-noise PWM operation | Fixed-frequency switching with voltage-mode control yields predictable EMI spectrum and <20mVPP ripple at 1A load. |
| Burst Mode efficiency optimization | Reduces no-load IQ to 32µA while maintaining regulation-ideal for intermittent-sensing applications. |
| Integrated protection suite | Includes overtemperature shutdown, input/peak/reverse current limiting, and internal soft-start (0.9ms typ.). |
| Output disconnect in shutdown | Prevents backfeed from VOUT to VIN-enables safe integration into multi-rail systems with independent power sequencing. |
| Small-footprint DFN package | 3mm × 3mm outline with exposed thermal pad achieves θJA = 39.7°C/W for high-power density layouts. |
Applications
| Wireless Inventory Terminals | Handheld Medical Instruments |
|---|---|
Use Scenario: Portable barcode scanners powered by single-cell Li-ion (2.7–4.2V) requiring stable 3.3V rail for MCU and RF transceiver. IC Role / Device Role / Timing Role: Primary buck-boost regulator maintaining 3.3V output as battery discharges below 3.3V and charges above it. Use Value: Eliminates need for separate buck and boost stages; 95% peak efficiency preserves battery life across full voltage range. |
Use Scenario: Battery-powered pulse oximeter with analog front-end demanding ultra-low noise and tight voltage tolerance. IC Role / Device Role / Timing Role: Low-noise power source for ADC reference and op-amp rails, operating in PWM mode to minimize ripple. Use Value: <20mVPP output ripple and ±1% accuracy ensure measurement integrity without post-regulation filtering. |
| Wireless Locators & Microphones | Supercapacitor Backup Power Supply |
Use Scenario: UWB-based indoor positioning tag using BLE SoC and ultra-low-power sensor fusion. IC Role / Device Role / Timing Role: Efficient power management IC enabling Burst Mode operation during idle periods and PWM during active ranging. Use Value: 32µA quiescent current extends months-long battery life; seamless mode switching avoids brownouts during wake events. |
Use Scenario: Real-time clock (RTC) backup supply charged from main 3.3V rail and sustaining operation during AC failure. IC Role / Device Role / Timing Role: Bidirectional buck-boost controller charging supercapacitor from 3.3V and discharging to 1.8–3.3V RTC rail. Use Value: Reverse current limit prevents uncontrolled discharge; output disconnect isolates backup rail during main power presence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Lower max output current (600mA), fixed 3.3V/5V options only; no RT programming or external sync. | Suitable for cost-sensitive consumer wearables but lacks programmability for precision industrial use. | Select if fixed-output, lower-cost, and smaller solution size outweigh need for adjustable frequency and fine VOUT tuning. |
| MAX77827AEWE+T | Higher IQ in low-power mode (20µA), but limited to 500mA output and narrower 2.5–5.5V input range. | Better for always-on IoT nodes with strict µA-level standby budgets, not for 1A peak loads. | Choose when ultra-low quiescent current dominates over output current capability and input flexibility. |
Compared with TPS63020DSJR and MAX77827AEWE+T, the LTC3536EDD#TRPBF uniquely combines 1A output, full 1.8–5.5V I/O adjustability, programmable frequency, and true seamless buck-boost operation-making it the preferred choice for high-fidelity portable instrumentation and RF subsystems.
Availability
LTC3536EDD#TRPBF is available at Aetrix Electronics and suitable for wireless inventory terminals, handheld medical instruments, wireless locators, and supercapacitor backup power supplies requiring stable component supply, long-lifecycle support, and guaranteed parametric compliance.
Supply support for LTC3536EDD#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 automotive-grade reliability testing.
The LTC3536EDD#TRPBF belongs to Linear's precision buck-boost regulator product line, designed specifically for noise-sensitive, battery-powered applications where input voltage varies across the output setpoint-such as portable test equipment and RF front-ends.
FAQ
What is the maximum continuous output current of the LTC3536EDD#TRPBF?
The LTC3536EDD#TRPBF delivers up to 1A continuous output current when VIN ≥ 3V and VOUT = 3.3V. At lower input voltages-e.g., VIN = 1.8V-the maximum continuous output drops to 300mA due to increased inductor current requirements in boost mode. Derating curves are provided in the Typical Performance Characteristics section of the LTC3536EDD#TRPBF datasheet.
Does the LTC3536EDD#TRPBF support external frequency synchronization?
Yes, the LTC3536EDD#TRPBF supports external synchronization via the MODE/SYNC pin. When driven with a clean clock signal (0.3–2MHz, ≥1.2V high level, 10–90% duty cycle), the internal oscillator locks to the external source-enabling EMI reduction through frequency dithering or alignment with system clocks. This capability is confirmed in the Pin Functions and Operation sections of the LTC3536EDD#TRPBF datasheet.
How does the LTC3536EDD#TRPBF handle output voltage regulation when VIN equals VOUT?
The LTC3536EDD#TRPBF uses a proprietary 4-switch control algorithm that enables seamless, transient-free regulation when VIN = VOUT-without entering discontinuous conduction or introducing subharmonic oscillation. During this "pass-through" region, switches A and D remain on while B and C modulate to maintain feedback loop stability. This behavior is explicitly verified in the Block Diagram and Operation sections of the LTC3536EDD#TRPBF datasheet.
What compensation network is required for stable operation of the LTC3536EDD#TRPBF?
The LTC3536EDD#TRPBF requires an external Type III compensation network between VC and FB pins, typically comprising RFF, CFF, CPOLE, and CFB. This configuration provides sufficient phase margin across load and input variations. Recommended values are detailed in the Applications Information section of the LTC3536EDD#TRPBF datasheet, with Figure 2 illustrating the standard implementation.
Is the LTC3536EDD#TRPBF pin-compatible with other packages in the LTC3536 family?
No, the LTC3536EDD#TRPBF (10-pin DFN) is not pin-compatible with the LTC3536EMSE#TRPBF (12-pin MSOP). While both share identical functionality and electrical specifications, their pin assignments differ-for example, SHDN is Pin 8 in DFN but Pin 10 in MSOP, and PGND is the exposed pad (Pin 11) in DFN versus Pin 5 + exposed pad (Pin 13) in MSOP. Layout redesign is required when substituting packages.
LTC3536EDD#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-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- 300kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC3536EDD#TRPBF FAQ
1.How can I place an order for LTC3536EDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3536EDD#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 LTC3536EDD#TRPBF reliable?
The price and inventory of LTC3536EDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3536EDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3536EDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3536EDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3536EDD#TRPBF?
LTC3536EDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3536EDD#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 LTC3536EDD#TRPBF?
For technical support, including LTC3536EDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3536EDD#TRPBF requirements.
6.How does Aetrix verify that LTC3536EDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3536EDD#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 LTC3536EDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3536EDD#TRPBF?
All LTC3536EDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3536EDD#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 LTC3536EDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3536EDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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