My Inquiry
My Account
Analog Devices Inc. LT3436EFE#PBF
- Part No.:
- LT3436EFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT3436EFE#PBF.pdf
- Description:
- IC REG BST SEPIC ADJ 3A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,525
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3436EFE#PBF from Analog Devices (formerly Linear Technology) is a monolithic 800kHz current-mode boost switching regulator with integrated 3A/0.1Ω NPN power switch, 1.2V feedback reference, ±2% output voltage tolerance, and thermally enhanced 16-pin TSSOP package. It delivers up to 0.9A at 12V from 5V input in portable computing and battery-powered systems.
For engineers reviewing the LT3436EFE#PBF datasheet, LT3436EFE#PBF pinout, LT3436EFE#PBF application, or LT3436EFE#PBF equivalent, key selection criteria include constant-frequency current-mode control, 3V–25V input range, 11µA shutdown current, synchronization capability (1MHz–1.4MHz), and thermal performance enabled by exposed-pad GND.
Technical Context
The LT3436EFE#PBF implements fixed-frequency (800kHz typ.) current-mode control using an internal oscillator, cycle-by-cycle peak current sensing, and an error amplifier whose output (VC pin) sets the switch current threshold. Its dual-loop architecture ensures fast transient response and stable operation across wide duty cycles.
It integrates a high-current NPN switch with 330mV typical on-voltage drop at 3A, a precision 1.2V ±1.5% feedback reference, and a dedicated SYNC pin accepting logic-level signals for external frequency synchronization up to 1.4MHz - enabling EMI reduction and multi-rail coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 800kHz typical; enables compact magnetics and low-profile ceramic capacitors (e.g., 3.9µH inductor, 4.7µF/22µF output caps). |
| Input Voltage Range | 3V to 25V; supports single Li-ion (2.7V–4.2V), 5V/12V rails, and 24V industrial inputs without external regulators. |
| Max Switch Current | 3A guaranteed minimum; constant over all duty cycles - critical for reliable boost operation under varying VIN/VOUT ratios. |
| Feedback Reference | 1.2V ±1.5% (±2% overall output tolerance); allows precise output setting via standard resistor dividers (e.g., 90.9kΩ/10kΩ for 12V). |
| Shutdown Current | 11µA max at VSHDN = 0V; enables ultra-low-power standby in battery-critical applications like DSL modems and portable computers. |
| Synchronization Range | 1MHz to 1.4MHz; accepts logic-compatible external clock to eliminate beat frequencies and simplify multi-converter layout. |
| Thermal Resistance | θJA = 45°C/W (typ.), θJC(PAD) = 10°C/W; exposed pad must be soldered to PCB ground plane for full 125°C junction rating. |
Pinout & Package
LT3436EFE#PBF uses a 16-lead plastic TSSOP package with exposed thermal pad (Pin 17 = GND). The package measures 4.4mm × 5.0mm × 1.1mm and requires soldering of the exposed pad to a PCB ground plane for thermal integrity and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 5, 6, 8, 9, 16, 17) | Power and signal reference ground | All GND pins plus exposed pad must be shorted on PCB; improper grounding causes load regulation error and instability. |
| VIN (Pin 2) | Main power input | Supplies internal bias regulator and switch driver; requires local 2.2µF–10µF ceramic bypass capacitor. |
| SW (Pins 3, 4) | Switch collector node | High-di/dt node connecting to inductor and catch diode; trace must be short and wide to minimize ringing and EMI. |
| FB (Pin 12) | Feedback input | Monitors output via resistor divider; 1.2V reference sets VOUT; impedance <5kΩ required for startup current foldback. |
| VC (Pin 13) | Error amplifier output / current limit control | Used for loop compensation (RC network); also clamps peak switch current - 0.3V (light load) to 0.9V (3A load). |
| SYNC (Pin 14) | External oscillator sync input | Logic-level compatible (1.5V–2.2V threshold); drives internal oscillator up to 1.4MHz; float or ground when unused. |
| SHDN (Pin 11) | Enable/disable control | 1.35V threshold; open or pulled high enables operation; internal 3µA pull-up allows simple UVLO implementation with resistive divider. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-frequency current-mode control | Enables predictable EMI spectrum, stable loop compensation, and fast transient response without subharmonic oscillation (slope-compensated). |
| Integrated 3A/0.1Ω NPN switch | Eliminates external MOSFET and gate driver; reduces BOM count and layout complexity while maintaining >85% efficiency at 0.8A (5V→12V). |
| Exposed-pad thermally enhanced TSSOP | θJC = 10°C/W enables 125°C continuous operation with proper PCB copper area - essential for high-power density portable designs. |
| 11µA shutdown supply current | Extends battery life in always-on systems; supports deep-sleep modes in DSL modems and handheld instruments. |
| Synchronization input (1–1.4MHz) | Allows deterministic timing alignment across multiple converters - critical for noise-sensitive applications like audio power supplies and imaging sensors. |
Applications
| DSL Modems | Portable Computers |
|---|---|
Use Scenario: Powering line-driver ICs and PHY transceivers requiring stable 12V from 3.3V or 5V system rails. IC Role / Device Role / Timing Role: Primary DC/DC boost converter delivering regulated 12V at up to 0.8A with low-noise, high-efficiency operation. Use Value: Enables compact, fanless modem design with <11µA shutdown current preserving standby battery life. |
Use Scenario: Generating 5V or 12V auxiliary rails from single-cell Li-ion batteries (2.7V–4.2V) in ultrabooks and tablets. IC Role / Device Role / Timing Role: High-efficiency step-up regulator supporting dynamic load steps during CPU/GPU activity bursts. Use Value: Delivers 1.5A at 5V from 3.3V input with >87% efficiency, minimizing thermal stress in space-constrained enclosures. |
| Battery-Powered Systems | Distributed Power |
Use Scenario: Providing isolated or non-isolated 5V/12V outputs in handheld test equipment, medical monitors, and IoT edge nodes. IC Role / Device Role / Timing Role: Main power conversion stage with UVLO (via SHDN pin) preventing brownout-induced system resets. Use Value: 3V–25V input range accommodates diverse chemistries (Li-ion, LiFePO₄, alkaline stacks); 1.35V SHDN threshold enables accurate undervoltage lockout. |
Use Scenario: Local point-of-load (POL) boosting in telecom infrastructure, where 12V or 24V backplane supplies feed lower-voltage subsystems. IC Role / Device Role / Timing Role: Compact, high-frequency boost converter synchronized to system clock to suppress conducted EMI. Use Value: 800kHz operation reduces filter size; SYNC pin allows phase alignment with other converters to cancel ripple currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3471EFE#PBF | Higher 1.3MHz switching frequency; 2.5A switch; 2.5V–16V input range; no SYNC pin. | Better suited for ultra-compact designs needing smaller inductors/caps but limited to lower input voltages. | Select LT3471EFE#PBF when board space is critical and input stays ≤16V; avoid if 24V or synchronization is required. |
| LT3573EDE#PBF | 600kHz frequency; 3A switch; 3V–40V input; integrated soft-start; no SYNC; different pinout (DFN-12). | Wider input range supports 36V automotive or industrial inputs; lacks synchronization and TSSOP thermal pad. | Choose LT3573EDE#PBF for high-input-voltage robustness (>25V) or soft-start necessity; not drop-in due to package and pinout mismatch. |
Compared with LT3436EFE#PBF, LT3471EFE#PBF trades input voltage headroom and synchronization for higher frequency and smaller passive components, while LT3573EDE#PBF extends input range to 40V but sacrifices thermal performance and timing control - making LT3436EFE#PBF optimal for 3V–25V, sync-capable, thermally demanding portable applications.
Availability
LT3436EFE#PBF is available at Aetrix Electronics and suitable for DSL modems, portable computers, and battery-powered systems requiring stable component supply, consistent thermal performance, and long-term production continuity.
Supply support for LT3436EFE#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) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving industrial, automotive, communications, and healthcare markets.
The LT3436EFE#PBF belongs to Linear's high-efficiency monolithic boost converter family, designed specifically for space-constrained, thermally sensitive applications requiring wide input range, precise regulation, and robust current-mode control.
FAQ
What is the maximum output current achievable with the LT3436EFE#PBF in a 5V-to-12V boost configuration?
The LT3436EFE#PBF delivers up to 0.9A at 12V from a 5V input under typical conditions (TA = 25°C, proper layout, thermal pad soldered). Maximum output current is thermally limited - derating applies above 85°C ambient or with insufficient copper area on the exposed pad. Efficiency remains >85% across this load range.
Can the LT3436EFE#PBF operate from a single Li-ion cell (2.7V–4.2V) to generate 5V?
Yes, the LT3436EFE#PBF supports input voltages down to 3V per datasheet specifications. With a 2.7V start-up condition, it can deliver up to 2.0A at 5V (per TA04 curve), provided the PCB layout minimizes trace resistance and the exposed pad is fully soldered for thermal management.
How does the SYNC pin function on the LT3436EFE#PBF, and what happens if left unconnected?
The SYNC pin on the LT3436EFE#PBF accepts logic-level signals (20%–80% duty cycle) to synchronize the internal oscillator from 1MHz to 1.4MHz. If left unconnected, the LT3436EFE#PBF operates at its nominal 800kHz frequency. Grounding the pin disables synchronization and reverts to free-running mode.
What is the role of the VC pin on the LT3436EFE#PBF, and how is it used in compensation?
The VC pin on the LT3436EFE#PBF is the error amplifier output and serves as the current-limit threshold input. For loop compensation, a series RC network (e.g., 10kΩ + 10nF) is connected between VC and GND to set dominant pole (2–20Hz) and zero (1–5kHz), ensuring stability with ceramic output capacitors.
Is the LT3436EFE#PBF RoHS-compliant and lead-free?
Yes, the LT3436EFE#PBF is RoHS-compliant and lead-free. The "#PBF" suffix explicitly denotes lead-free (Pb-free) packaging per Analog Devices' product marking convention and meets JEDEC J-STD-020 moisture sensitivity level 3 requirements.
LT3436EFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 35V (Switch)
- Current - Output:
- 3A (Switch)
- Frequency - Switching:
- 800kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
LT3436EFE#PBF FAQ
1.How can I place an order for LT3436EFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3436EFE#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 LT3436EFE#PBF reliable?
The price and inventory of LT3436EFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3436EFE#PBF is usually 5 days.
3.What payment methods are accepted for LT3436EFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3436EFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3436EFE#PBF?
LT3436EFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3436EFE#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 LT3436EFE#PBF?
For technical support, including LT3436EFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3436EFE#PBF requirements.
6.How does Aetrix verify that LT3436EFE#PBF is sourced from the original manufacturer or authorized distributors?
All LT3436EFE#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 LT3436EFE#PBF meets industry standards.
7.What is the process for return or replacement of LT3436EFE#PBF?
All LT3436EFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3436EFE#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 LT3436EFE#PBF part is unused and in its original packaging.
Return procedure for LT3436EFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3436EFE#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
