My Inquiry
My Account
Analog Devices Inc. LT3154AV#TRPBF
- Part No.:
- LT3154AV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
LT3154AV#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 6A 16LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,663
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3154AV#TRPBF from Analog Devices is a 6A synchronous buck-boost DC/DC converter with single-inductor architecture, operating across 1.8V–5.5V input and adjustable 1.8V–5.5V output. It delivers up to 97% efficiency at 2.2MHz, features 17μA Burst Mode quiescent current, and integrates low-RDS(ON) N-/P-channel MOSFETs (25mΩ/18mΩ) in a thermally enhanced 3mm × 3mm LQFN package for portable medical instruments and battery-powered RF transmitters.
For engineers reviewing the LT3154AV#TRPBF datasheet, LT3154AV#TRPBF pinout, LT3154AV#TRPBF application, or LT3154AV#TRPBF equivalent, key selection criteria include its wide VIN/VOUT overlap range, programmable 500kHz–4MHz switching frequency, selectable Burst/PWM mode, internal soft-start, and UVLO threshold programming - all critical for compact, high-efficiency power rails in space-constrained embedded systems.
Technical Context
The LT3154AV#TRPBF employs a proprietary four-switch buck-boost topology with average current mode control, enabling seamless transitions between buck, buck-boost, and boost modes without discontinuities in inductor current or loop transfer function. Its internal transconductance error amplifier (110μS) and dual-stage PWM drive logic coordinate SW1/SW2 switching with precise peak (8–12A), average (5.4–8.7A), zero-crossing, and reverse-current (–0.9 to –1.8A) limits.
Operation supports fixed-frequency PWM (via RT resistor or external SYNC clock) or automatic Burst Mode (via SYNC/MODE = GND), with oscillator programmability from 500kHz to 4MHz and ±18% tolerance accommodation. The VC pin provides direct access to the voltage error amplifier output for loop compensation using external RC/CC/CHF networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 1.8V to 5.5V - supports single-cell Li-ion, 2-cell alkaline, USB, and backup power sources without pre-regulation. |
| VOUT Range | 1.8V to 5.5V (adjustable via FB divider) - enables rail-to-rail output matching for mixed-voltage SoCs and peripherals. |
| Continuous Output Current | Up to 6A - sustained delivery under buck-dominant conditions (VIN > VOUT) with thermal management via exposed PGND pad. |
| Quiescent Current | 17μA in Burst Mode - extends battery life in always-on portable terminals and handheld computers. |
| Switching Frequency | Programmable 500kHz–4MHz (default 2.2MHz) - balances EMI suppression, inductor size, and efficiency for noise-sensitive RF applications. |
| Feedback Voltage | 0.97V to 1.01V (typ. 0.99V) - high-accuracy reference enables ±1% output regulation over temperature and load. |
| MOSFET RDS(ON) | High-side: 25mΩ; Low-side: 18mΩ @ 3.6V - minimizes conduction loss and thermal rise in high-current 3.3V/5V conversion. |
Pinout & Package
The LT3154AV#TRPBF is housed in a 16-lead 3mm × 3mm × 0.74mm LQFN package with an exposed PGND thermal pad (Pin 17) requiring solder connection to PCB ground plane per JEDEC θJA = 30°C/W specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (1,2) | Power input supply rail | Must be connected to VIN; requires ≥22μF low-ESR capacitor to PGND for high-current transient response. |
| VIN (3) | Signal input voltage reference | Low-noise control supply decoupled with ≥1μF capacitor; powers internal bias circuitry. |
| EN/UVLO (4) | Enable and undervoltage lockout input | Programmable turn-on (1.155–1.245V) and hysteresis (100mV); connects to resistor divider for source-specific startup. |
| SYNC/MODE (5) | Mode select and clock sync input | Logic-high = PWM only; logic-low = Burst Mode; external clock = synchronized operation with 75ns min pulse width. |
| RT (6) | Oscillator frequency programming | Resistor-to-GND sets fSW = 110/RT (kΩ); connect to VIN for fixed 2.2MHz operation. |
| GND (7) | Signal ground reference | Separate low-noise return for control circuitry; must tie to PGND at single point on PCB. |
| SS (8) | Soft-start timing control | Connect to VIN for 2.2ms default ramp; external capacitor sets tSS = 0.8 × CSS (nF) to limit inrush current. |
| FB (9) | Output voltage feedback node | Resistor divider sets VOUT = 1.0V × (1 + R3/R4); 50nA max input leakage preserves accuracy. |
| VC (10) | Voltage error amplifier output | Drives current loop; requires external RC/CC/CHF network for stable average current mode compensation. |
| VOUT (11) | Signal output voltage reference | Low-noise sensing node decoupled with ≥1μF capacitor; ties directly to PVOUT. |
| PVOUT (12) | Power output supply rail | Must connect to VOUT; requires ≥68μF low-ESR capacitor to PGND (value scales with VOUT and load). |
| SW2 (13) | Switch node 2 | Connects to one end of power inductor; switches with SW1 to implement four-switch buck-boost topology. |
| PGND (14,15,17) | Power ground return | Exposed pad (Pin 17) is mandatory PGND connection; ensures θJC = 6°C/W thermal performance. |
| SW1 (16) | Switch node 1 | Connects to other end of power inductor; complements SW2 for bidirectional energy transfer. |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor buck-boost architecture | Eliminates need for separate buck/boost converters or coupled inductors - reduces BOM count and board area by >30% in multi-rail portable designs. |
| Adjustable 500kHz–4MHz switching frequency | Enables optimization for EMI compliance (lower fSW) or miniaturization (higher fSW), with external synchronization support for noise-critical RF subsystems. |
| Burst Mode® with 17μA IQ | Maintains >85% efficiency at 1mA load - critical for long-duration standby in handheld medical devices and inventory scanners. |
| Programmable EN/UVLO and soft-start | Allows precise power sequencing and inrush control across diverse battery chemistries (Li-ion, NiMH, alkaline) without additional discrete components. |
| Thermally enhanced 3mm × 3mm LQFN | Exposes PGND pad for direct PCB thermal coupling - achieves 50°C/W effective θJA in 2-layer layouts, supporting 6A continuous output. |
Applications
| Portable Inventory Terminals | Handheld Computers |
|---|---|
Use Scenario: Powering ARM-based SoC, display backlight, and 2D barcode scanner from single Li-ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Primary buck-boost regulator delivering regulated 3.3V and 5.0V rails with seamless VIN-to-VOUT crossover during battery discharge. Use Value: Eliminates need for separate buck and boost stages, reducing solution size by 40% while maintaining >92% efficiency across full battery voltage range. |
Use Scenario: Supplying 1.8V core, 3.3V I/O, and 5V USB OTG from dual-cell alkaline (1.8–3.2V) or USB-C (5V) input. IC Role / Device Role / Timing Role: Single-chip dual-output power manager with independent FB dividers and coordinated soft-start sequencing. Use Value: Enables rapid wake-from-sleep with <2.2ms soft-start and 17μA quiescent current - extending runtime by 3.2× vs. conventional PMIC solutions. |
| Wireless RF Transmitter | Battery-Powered Systems |
Use Scenario: Biasing PA stage and powering RF transceiver IC in sub-GHz ISM band module operating from coin cell or Li-SOCl₂ battery. IC Role / Device Role / Timing Role: High-efficiency, low-noise power source with SYNC/MODE pin enabling external clock synchronization to avoid RF band interference. Use Value: Achieves <–65dBc conducted EMI at 2.4GHz with 2.2MHz fixed-frequency PWM mode - meets FCC Part 15 Class B requirements without shielding. |
Use Scenario: Providing stable 3.3V rail for microcontroller, sensors, and BLE radio in wearable health monitor powered by CR2032 or thin-film battery. IC Role / Device Role / Timing Role: Ultra-low-IQ buck-boost converter with programmable UVLO to prevent deep discharge and extend battery cycle life. Use Value: Delivers 89% efficiency at 100μA load and maintains regulation down to 1.8V VIN - enabling 14-day operation on single CR2032 cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2918GL-Z | 4A rated, 2.5V–18V input, fixed 3.3V/5V outputs, no programmable UVLO or SYNC | Limited to fixed-output industrial modules; lacks Burst Mode and adjustable frequency | Choose for cost-sensitive, non-battery applications where 4A output suffices and design simplicity outweighs feature flexibility. |
| TPS63020DSJR | 3A rated, 1.8V–5.5V input, 1.2V–5.5V output, 2.4MHz fixed frequency, 25μA IQ | Lower current capability and higher quiescent current; no external RT or SS programming | Prefer when footprint compatibility with existing TPS6302x designs is required and 3A output meets system needs. |
Compared with MP2918GL-Z and TPS63020DSJR, the LT3154AV#TRPBF offers 2× higher output current, 40% lower light-load quiescent current, and full programmability of frequency, soft-start, and UVLO - making it uniquely suited for next-generation portable instrumentation demanding both high density and extended battery life.
Availability
LT3154AV#TRPBF is available at Aetrix Electronics and suitable for portable inventory terminals, handheld computers, and wireless RF transmitters requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability for medical and industrial OEM programs.
Supply support for LT3154AV#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.
The LT3154AV#TRPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency DC/DC converters, engineered specifically for compact, high-current battery-powered systems where input voltage may fall above, below, or equal to the required output rail.
FAQ
What is the maximum continuous output current of the LT3154AV#TRPBF?
The LT3154AV#TRPBF delivers up to 6A continuous output current when operating in buck mode (VIN > VOUT) with adequate PCB thermal design. Its 25mΩ high-side and 18mΩ low-side MOSFETs, combined with the exposed PGND pad, enable this rating while maintaining junction temperature within the –40°C to 125°C operating range. Derating applies under boost-dominant conditions or elevated ambient temperatures.
How does the LT3154AV#TRPBF handle input voltages both above and below the output voltage?
The LT3154AV#TRPBF uses a four-switch synchronous buck-boost topology that automatically transitions between buck, buck-boost, and boost modes without interruption. When VIN > VOUT, switches A/B PWM while D remains on; when VIN ≈ VOUT, all four switches modulate; when VIN < VOUT, switches C/D PWM while A remains on. This seamless algorithm maintains continuous regulation and avoids output glitches across the full 1.8V–5.5V range.
Can the LT3154AV#TRPBF be synchronized to an external clock, and what are the requirements?
Yes, the LT3154AV#TRPBF can be synchronized to an external clock applied to the SYNC/MODE pin. The external clock frequency must exceed the internally programmed oscillator frequency (set by RT), and the RT resistor must be selected to set the internal oscillator 25%–50% below the lowest synchronization frequency to accommodate ±18% oscillator tolerance. Pulse width must be ≥75ns, and the clock must be clean and rail-to-rail.
What is the purpose of the VC pin on the LT3154AV#TRPBF, and how is it used?
The VC pin on the LT3154AV#TRPBF is the output of the internal transconductance voltage error amplifier (110μS). It drives the average current mode control loop and requires external compensation components (RC, CC, CHF) connected to GND to stabilize the voltage and current loops. Proper VC network design ensures robust load transient response and prevents oscillation, especially in boost-mode operation where right-half-plane zero effects dominate.
Does the LT3154AV#TRPBF support programmable undervoltage lockout, and how is it configured?
Yes, the LT3154AV#TRPBF supports accurate, resistor-programmable undervoltage lockout via the EN/UVLO pin. Connecting a resistor divider from VIN to GND sets the turn-on threshold as VTURNON = 1.2V × (1 + R1/R2), with 100mV internal hysteresis. This allows precise startup/shutdown control tailored to specific battery chemistries - for example, enabling operation only above 3.0V for Li-ion cells while preventing deep discharge.
LT3154AV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-VFQFN 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:
- 6A
- Frequency - Switching:
- 2.2MHz, 500kHz ~ 4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LQFN (3x3)
LT3154AV#TRPBF FAQ
1.How can I place an order for LT3154AV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3154AV#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 LT3154AV#TRPBF reliable?
The price and inventory of LT3154AV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3154AV#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3154AV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3154AV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3154AV#TRPBF?
LT3154AV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3154AV#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 LT3154AV#TRPBF?
For technical support, including LT3154AV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3154AV#TRPBF requirements.
6.How does Aetrix verify that LT3154AV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3154AV#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 LT3154AV#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3154AV#TRPBF?
All LT3154AV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3154AV#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 LT3154AV#TRPBF part is unused and in its original packaging.
Return procedure for LT3154AV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3154AV#TRPBF 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…
