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Analog Devices Inc. LTC3424EMS#PBF
- Part No.:
- LTC3424EMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC3424EMS#PBF.pdf
- Description:
- IC REG BOOST ADJ 2A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,713
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Product details
Overview
LTC3424EMS#PBF 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, 95% peak efficiency, and supports adjustable output voltages from 1.5V to 5.5V - ideal for powering 1.8V logic rails in GPS receivers and handheld instrumentation.
For engineers reviewing the LTC3424EMS#PBF datasheet, LTC3424EMS#PBF pinout, LTC3424EMS#PBF application, or LTC3424EMS#PBF equivalent, key selection criteria include its 0.16Ω NMOS/0.21Ω PMOS synchronous switch pair, Burst Mode® operation (38µA quiescent current), 3MHz programmable switching frequency, and MSOP-10 package compatibility with space-constrained portable designs.
Technical Context
The LTC3424EMS#PBF employs current-mode control with adaptive slope compensation for stable loop response across input/output variations. Its internal architecture integrates a 2A NMOS main switch and 0.21Ω P-channel synchronous rectifier, eliminating external Schottky diodes while enabling >95% efficiency at light-to-moderate loads.
Burst Mode® operation is user-enabled via the MODE/SYNC pin and reduces quiescent current to 38µA by entering sleep cycles when regulation is met; fixed-frequency mode (up to 3MHz) is selected by pulling MODE/SYNC low or synchronizing to an external clock signal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Current Rating | 2A max - supports ≥700mA output at 1.8V from 1.2V input without thermal derating |
| Input Voltage Range | 0.5V to 5.5V operating - enables startup from weak single-cell alkaline or NiMH sources |
| Output Voltage Range | 1.5V to 5.5V adjustable - set via resistor divider on FB pin with 1.25V reference |
| Quiescent Current | 38µA in Burst Mode® - extends battery life in standby-sensitive applications like pagers |
| Switching Frequency | Up to 3MHz - allows use of sub-3mm inductors (e.g., 2.2µH) for ultra-compact layouts |
| Efficiency | Up to 95% - achieved via synchronous rectification, eliminating Schottky conduction loss |
| Shutdown Current | <1µA - ensures minimal battery drain during system sleep states |
Pinout & Package
Package: 10-lead MSOP (3mm × 3mm × 1.1mm height), RoHS-compliant, with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Rt | Oscillator timing resistor connection | Programs switching frequency per fOSC = 3×10¹⁰/Rt; sets max 3MHz operation |
| MODE/SYNC | Burst Mode enable / external clock sync input | High = Burst Mode®; Low = fixed frequency; external clock disables Burst Mode |
| VIN | Input voltage sense for control circuitry | Operates down to 0.5V but requires VDD ≥2.7V for startup |
| SW | Switch node | Connects to inductor and optional Schottky; handles 2A peak current |
| GND | Signal and power ground | Common return for control logic, feedback, and power paths |
| VDD | Internal circuitry power supply | Must be ≥2.7V (up to 5.5V); powers gate drivers and error amp |
| VOUT | Synchronous rectifier output | Delivers regulated output; body diode provides hold-up during shutdown |
| FB | Feedback voltage sensing | Monitors resistor divider; 1.25V reference enables precise output adjustment |
| VC | Error amplifier output | Connects to compensation network (RZ, CC1, CC2) for loop stability |
| SHDN | Enable/disable control | Ground = shutdown (<1µA IQ); >1V = active |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 0.16Ω NMOS + 0.21Ω PMOS switches eliminate external Schottky diode and associated losses |
| Burst Mode® operation | User-selectable via MODE/SYNC pin; reduces IQ to 38µA while maintaining regulation under light loads |
| OPTI-LOOP® compensation | Single-pole compensation network on VC pin simplifies stability design across wide load/input ranges |
| Wide input range | 0.5V–5.5V VIN operation enables direct interface with depleted single-cell batteries |
| Thermal shutdown & current limit | Protects against overload and PCB overheating; current limit threshold is 2A typical (LTC3424) |
Applications
| GPS Receivers | Handheld Instruments |
|---|---|
Use Scenario: Powering 1.8V RF front-end and baseband ICs from a single 1.2V–1.5V alkaline/NiMH cell. IC Role / Device Role / Timing Role: Primary step-up regulator delivering regulated 1.8V at up to 600mA with low-noise fixed-frequency operation. Use Value: Enables continuous GPS lock during battery depletion; Burst Mode® extends tracking time by 3.2× vs. fixed-frequency mode at 500µA load. | Use Scenario: Supplying 3.3V microcontroller core and 1.8V sensor interface from one AA cell in portable multimeters. IC Role / Device Role / Timing Role: Dual-rail boost converter using resistor-divider programming and OPTI-LOOP® for fast transient response to measurement bursts. Use Value: Maintains 1% output regulation across 0.9V–1.5V input swing; 95% efficiency minimizes heat in sealed enclosures. |
| Pagers | Battery Backup Systems |
Use Scenario: Providing 2.5V display driver and 1.8V logic supply in ultra-low-power paging receivers with intermittent wake-up. IC Role / Device Role / Timing Role: Standby-optimized boost converter leveraging 38µA Burst Mode® quiescent current and <1µA shutdown. Use Value: Achieves 12-month shelf life on CR2032 coin cell; no external diode reduces BOM count and board area. | Use Scenario: Backing up real-time clock (RTC) and SRAM during main power failure in industrial controllers. IC Role / Device Role / Timing Role: Low-voltage boost stage converting 0.9V supercapacitor or backup cell to 3.3V system rail. Use Value: Starts reliably at 0.5V input; body diode in PMOS switch holds VOUT during SHDN assertion without external MOSFET. |
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#PBF | Same 2A switch rating, but lacks VDD pin - powered directly from VIN; no separate 2.7V+ bias required | Better suited for VIN ≥2.7V systems; cannot operate below 2.7V VIN due to lack of auxiliary VDD rail | Select LTC3402EMS#PBF if input voltage consistently exceeds 2.7V and board space permits removal of VDD supply path |
| TPS61099YFFR | Lower 1.2A switch current, 1.2MHz fixed frequency, 300nA shutdown current - no programmable Rt or external sync | Optimized for ultra-low-IQ wearables; not suitable for >600mA loads or noise-sensitive RF apps requiring 3MHz operation | Choose TPS61099YFFR only for sub-300mA, coin-cell-powered devices where minimum shutdown current outweighs frequency flexibility |
Compared with LTC3402EMS#PBF and TPS61099YFFR, the LTC3424EMS#PBF uniquely supports true single-cell operation down to 0.5V VIN *while* providing a dedicated VDD rail for robust control-circuit biasing - making it irreplaceable in legacy 1.2V–1.5V battery systems requiring high output current and frequency agility.
Availability
LTC3424EMS#PBF is available at Aetrix Electronics and suitable for GPS receivers, handheld instruments, pagers, battery backup systems, and wireless handsets requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC3424EMS#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 and maintains full product support, documentation, and manufacturing continuity for all Linear-branded power ICs.
The LTC3424EMS#PBF belongs to Linear's micropower synchronous boost converter family, designed specifically for space- and energy-constrained portable electronics powered by single-cell alkaline, NiMH, or LiFePO₄ batteries.
FAQ
What is the minimum input voltage required for LTC3424EMS#PBF to start switching?
The LTC3424EMS#PBF requires ≥2.7V applied to the VDD pin to power internal control circuitry and initiate switching. However, once started, the device continues regulating with VIN as low as 0.5V - enabling operation from deeply discharged single-cell batteries. The VDD supply must be derived separately (e.g., from a higher-voltage rail or charge pump).
Can LTC3424EMS#PBF operate without an external timing resistor?
No. The LTC3424EMS#PBF requires an external resistor (Rt) connected from Pin 1 to GND to set the oscillator frequency per fOSC = 3×10¹⁰/Rt. Without Rt, the oscillator remains inactive and no switching occurs. Typical values range from 15kΩ (2MHz) to 30.1kΩ (1MHz) for common applications.
Does LTC3424EMS#PBF require an external Schottky diode for proper operation?
No. The LTC3424EMS#PBF integrates both NMOS and PMOS synchronous switches, eliminating the need for an external Schottky diode. While adding one (e.g., MBRM120T3) can marginally improve peak efficiency at high frequencies, it is optional - unlike non-synchronous boost converters which mandate external diodes.
How does Burst Mode® operation affect output voltage ripple on LTC3424EMS#PBF?
In Burst Mode®, the LTC3424EMS#PBF 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 operation's consistent 100–300kHz ripple. Designers should verify ripple tolerance in noise-sensitive analog sections (e.g., GPS LNA) before enabling Burst Mode®.
What is the thermal performance of LTC3424EMS#PBF in a standard 1-layer PCB layout?
In a standard 1-layer PCB layout, the LTC3424EMS#PBF has a junction-to-ambient thermal resistance (θJA) of 130°C/W. At 1.5W output power and 25°C ambient, this results in ~195°C junction temperature - exceeding the 125°C maximum. A 4-layer board (θJA = 100°C/W) or thermal vias under the exposed pad are mandatory for reliable continuous operation.
LTC3424EMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC3424EMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3424EMS#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 LTC3424EMS#PBF reliable?
The price and inventory of LTC3424EMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3424EMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC3424EMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3424EMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3424EMS#PBF?
LTC3424EMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3424EMS#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 LTC3424EMS#PBF?
For technical support, including LTC3424EMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3424EMS#PBF requirements.
6.How does Aetrix verify that LTC3424EMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3424EMS#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 LTC3424EMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC3424EMS#PBF?
All LTC3424EMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3424EMS#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 LTC3424EMS#PBF part is unused and in its original packaging.
Return procedure for LTC3424EMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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