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Analog Devices Inc. LTC3424EMS#TRPBF
- Part No.:
- LTC3424EMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC3424EMS#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 2A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,336
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Product details
Overview
LTC3424EMS#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, fixed-frequency, synchronous step-up DC/DC converter optimized for single-cell battery systems. It delivers up to 1.5W output power with 2A switch current limit, 95% peak efficiency, and supports adjustable output voltages from 1.5V to 5.5V. Designed for low-noise portable instrumentation, it operates from 0.5V input and requires ≥2.7V on VDD to power internal circuitry.
For engineers reviewing the LTC3424EMS#TRPBF datasheet, LTC3424EMS#TRPBF pinout, LTC3424EMS#TRPBF application, or LTC3424EMS#TRPBF equivalent, key selection criteria include burst-mode enable control, 3MHz programmable switching frequency via external resistor, OPTI-LOOP® compensation, thermal shutdown, and MSOP-10 package compatibility with space-constrained handheld devices.
Technical Context
The LTC3424EMS#TRPBF employs current-mode control with adaptive slope compensation, enabling stable loop response across wide input/output voltage ranges and fast transient load recovery. Its integrated 0.16Ω NMOS switch and 0.21Ω PMOS synchronous rectifier eliminate external Schottky diode requirements while maintaining high efficiency at light loads.
Burst Mode operation-enabled by driving MODE/SYNC high-reduces quiescent current to 38µA, extending battery life in intermittent-load applications. Fixed-frequency mode (MODE/SYNC low or externally synchronized) ensures predictable EMI behavior, with oscillator accuracy ±20% over temperature and supply variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Current Limit | 2A typical - supports ≥1.5W output at 1.8V/600mA with margin for peak transients |
| Input Voltage Range | 0.5V to 5.5V operating - enables direct connection to discharged alkaline/NiMH cells down to 0.5V |
| Output Voltage Range | 1.5V to 5.5V adjustable - set via resistor divider on FB pin with 1.25V reference |
| Quiescent Current (Burst) | 38µA - extends battery runtime in standby without compromising startup capability |
| Switching Frequency | Up to 3MHz - allows use of sub-3mm inductors (e.g., 2.2µH) for ultra-compact PCB layouts |
| Efficiency (Peak) | 95% - achieved with synchronous rectification, minimizing conduction losses vs. diode-based boosters |
| Shutdown Current | <1µA - ensures negligible drain during system sleep or storage |
| Package | 10-lead MSOP - 3mm × 3mm footprint with exposed pad for thermal management in high-power density designs |
Pinout & Package
Package: 10-lead MSOP (3mm × 3mm, 0.5mm pitch), thermally enhanced with exposed pad (GND-connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Rt | Oscillator timing input | Connects external resistor to ground to set switching frequency (f = 3×10¹⁰/Rt Hz); enables precise EMI tuning |
| MODE/SYNC | Burst mode control / clock sync | High = Burst Mode (38µA IQ); Low = fixed frequency; external clock = synchronization (100ns–2µs pulse width) |
| VIN | Main power input | Accepts 0.5V–5.5V input; powers power path only-IC control logic powered separately via VDD |
| SW | Switch node | Drives external inductor; connects to NMOS drain and PMOS source; requires short, low-inductance trace |
| GND | Signal and power ground | Common reference for all analog/digital blocks; must be connected to exposed pad for thermal and noise performance |
| VDD | Internal circuitry supply | Requires 2.7V–5.5V independent supply; powers error amp, oscillator, logic-enables operation below VIN |
| VOUT | Synchronous rectifier output | Delivers regulated output; body diode provides hold-up during shutdown (VIN – 0.3V typical) |
| FB | Feedback input | Monitors output via resistor divider; 1.25V reference enables accurate 1.5V–5.5V adjustment |
| VC | Error amplifier output | Connects OPTI-LOOP® compensation network (RZ, CC1, CC2); sets loop stability and transient response |
| SHDN | Enable/disable control | Ground = shutdown (<1µA IQ); >1V = active; no external pull-up required |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing BOM count and board area while achieving 95% peak efficiency |
| Burst Mode enable control | User-selectable via MODE/SYNC pin-enables 38µA quiescent current without sacrificing startup reliability |
| OPTI-LOOP® compensation | Single-pole compensation network on VC pin simplifies design and ensures stability across full load/temperature range |
| Zero-current detection | Shuts off PMOS switch when inductor current drops below 50mA, preventing reverse current and improving light-load efficiency |
| Thermal shutdown & current limit | Protects against sustained overload or poor heatsinking; latches off until thermal recovery and restart conditions met |
| 3MHz programmable oscillator | External Rt resistor allows precise frequency selection (100kHz–3MHz), enabling optimal trade-off between size and efficiency |
Applications
| Handheld Medical Instruments | GPS Receivers |
|---|---|
Use Scenario: Portable blood glucose meters and pulse oximeters powered by single AA/AAA cells requiring stable 1.8V or 3.3V rails. IC Role / Device Role / Timing Role: Primary step-up regulator delivering regulated output from 0.9V–1.5V battery input; manages burst-mode transitions during sensor sampling intervals. Use Value: 38µA Burst Mode IQ extends battery life to >6 months per set; 95% efficiency minimizes heat in sealed enclosures. |
Use Scenario: Compact GPS modules in asset trackers where RF sensitivity demands low-noise, fixed-frequency operation. IC Role / Device Role / Timing Role: Supplies clean 3.3V to GPS baseband IC and LNA; synchronized to system clock to avoid IF band interference. Use Value: 3MHz fixed-frequency mode avoids 455kHz/1.1MHz sensitive bands; MSOP-10 footprint fits <8mm² PCB area. |
| Wireless Handsets | Battery-Backed Real-Time Clocks |
Use Scenario: Feature phones with OLED displays needing 5.5V bias from single Li-ion cell during call bursts. IC Role / Device Role / Timing Role: High-current boost stage supporting 600mA pulsed loads; MODE/SYNC driven by baseband processor for dynamic efficiency scaling. Use Value: 2A switch current handles 5.5V@600mA peaks; 0.16Ω NMOS RDS(ON) limits voltage drop during transmit events. |
Use Scenario: Industrial controllers retaining time/date during main power loss using coin-cell backup. IC Role / Device Role / Timing Role: Maintains 3.0V RTC supply from 1.2V CR2032 cell; enters Burst Mode between time updates to minimize self-discharge. Use Value: <1µA shutdown current prevents measurable coin-cell depletion over 10-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3402EMS#TRPBF | Same 2A switch current and MSOP-10 package, but lacks VDD pin-uses VIN for internal logic; no separate VDD supply required | Preferred for simpler single-rail systems where VIN ≥2.7V; unsuitable when VIN dips below 2.7V during operation | Select LTC3402EMS#TRPBF if VDD rail is unavailable and VIN remains ≥2.7V; otherwise retain LTC3424EMS#TRPBF for true ultra-low-VIN support |
| LTC3426EMS#TRPBF | Higher 3A switch current, 1.5MHz max frequency, and integrated power-good flag; same VDD requirement and pinout | Used in systems requiring fault reporting or higher output current (e.g., 5V@1A); adds PGOOD signal for sequencing | Choose LTC3426EMS#TRPBF when >1.5W output or system-level power monitoring is needed; LTC3424EMS#TRPBF remains optimal for cost-sensitive 1.5W designs |
Compared with LTC3402EMS#TRPBF, LTC3424EMS#TRPBF enables operation with VIN as low as 0.5V while maintaining internal regulation via dedicated VDD-critical for deeply discharged batteries. Versus LTC3426EMS#TRPBF, it trades peak current headroom and PGOOD for lower cost and identical footprint in standard 1.5W applications.
Availability
LTC3424EMS#TRPBF is available at Aetrix Electronics and suitable for handheld medical instruments, GPS receivers, wireless handsets, and battery-backed real-time clocks requiring stable component supply across long production lifecycles.
Supply support for LTC3424EMS#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 precision analog and power management portfolio. Linear pioneered high-efficiency micropower DC/DC conversion for portable electronics.
The LTC3424EMS#TRPBF belongs to Linear's synchronous boost converter family targeting single-cell battery systems with stringent size, efficiency, and quiescent current requirements-designed specifically for space-constrained, battery-powered instrumentation.
FAQ
What is the minimum input voltage the LTC3424EMS#TRPBF can regulate from?
The LTC3424EMS#TRPBF operates with an input voltage as low as 0.5V, making it suitable for deeply discharged alkaline or NiMH cells. However, the VDD pin must be supplied with ≥2.7V independently to power internal control circuitry-this allows regulation even when VIN falls below 2.7V. The device will not start up until VDD exceeds 2.7V.
How does Burst Mode operation affect output ripple on the LTC3424EMS#TRPBF?
In Burst Mode, the LTC3424EMS#TRPBF delivers energy in discrete packets until regulation is achieved, then sleeps-causing variable-frequency ripple with a typical steady-state amplitude below 3%. This differs from fixed-frequency mode, which produces consistent 3MHz ripple. Burst Mode reduces average IQ to 38µA but increases low-frequency spectral content, so fixed-frequency mode is preferred for noise-sensitive RF sections.
Can the LTC3424EMS#TRPBF be synchronized to an external clock?
Yes-the MODE/SYNC pin accepts an external clock signal (100ns–2µs pulse width) to synchronize the internal oscillator. To ensure reliable synchronization, the free-running frequency (set by Rt) must be ~30% lower than the target sync frequency. During synchronization, Burst Mode is automatically disabled, enforcing constant-frequency operation for EMI predictability.
What is the purpose of the VDD pin on the LTC3424EMS#TRPBF?
The VDD pin supplies power exclusively to the LTC3424EMS#TRPBF's internal control circuitry-including the error amplifier, oscillator, and logic-requiring 2.7V to 5.5V. This decouples control power from the main VIN rail, enabling operation even when VIN drops below 2.7V (e.g., during battery discharge). Without proper VDD voltage, the IC will not start or regulate, regardless of VIN level.
Does the LTC3424EMS#TRPBF require an external Schottky diode?
No-the LTC3424EMS#TRPBF integrates both NMOS and PMOS switches for synchronous rectification, eliminating the need for an external Schottky diode. While adding one (e.g., MBRM120T3) can improve peak efficiency by ~1–2% during NMOS-to-PMOS transition, it is optional and adds cost/area. The internal synchronous design achieves 95% peak efficiency without it.
LTC3424EMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- Up to 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC3424EMS#TRPBF FAQ
1.How can I place an order for LTC3424EMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3424EMS#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 LTC3424EMS#TRPBF reliable?
The price and inventory of LTC3424EMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3424EMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3424EMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3424EMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3424EMS#TRPBF?
LTC3424EMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3424EMS#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 LTC3424EMS#TRPBF?
For technical support, including LTC3424EMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3424EMS#TRPBF requirements.
6.How does Aetrix verify that LTC3424EMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3424EMS#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 LTC3424EMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3424EMS#TRPBF?
All LTC3424EMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3424EMS#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 LTC3424EMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC3424EMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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