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Analog Devices Inc./Maxim Integrated MAX1724EZK27+T
- Part No.:
- MAX1724EZK27+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX1724EZK27+T.pdf
- Description:
- IC REG BOOST 2.7V 400MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,630
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Product details
Overview
The MAX1724EZK27+T from Maxim Integrated is a fixed-output, 2.7V step-up DC-DC converter IC optimized for single-cell battery-powered systems. It features 1.5μA quiescent current, 0.91V guaranteed startup voltage, ±1% output voltage accuracy over temperature, and integrated synchronous rectification. It is used in ultra-low-power remote controls and medical sensors where minimal standby drain and compact size are critical.
For engineers reviewing the MAX1724EZK27+T datasheet, MAX1724EZK27+T pinout, MAX1724EZK27+T application, or MAX1724EZK27+T equivalent, key selection criteria include fixed 2.7V output, TSOT-5 package compatibility, shutdown current ≤0.5µA at +25°C, EMI suppression via internal damping switch, and operation down to 0.8V input.
Technical Context
The MAX1724EZK27+T employs a forced discontinuous, current-limited PFM control scheme with no oscillator-switching frequency varies dynamically with load. Its 0.5Ω N-channel power switch and integrated P-channel synchronous rectifier eliminate external diodes while maintaining high light-load efficiency.
It integrates a dedicated damping switch on the BATT pin to suppress LX node ringing and reduce EMI without degrading efficiency. Startup is powered directly from BATT, enabling reliable operation from 0.91V input-critical for aging alkaline or NiMH cells.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7V ±1% (2.633V–2.767V over –40°C to +85°C); enables direct replacement of 2.7V LDOs without feedback resistors. |
| Input Voltage Range | 0.8V to 5.5V; supports single-cell alkaline/NiMH (0.9–1.6V) and Li+ (2.7–4.2V) without external biasing. |
| Quiescent Current | 1.5µA into OUT (typical); ensures >1-year battery life in 10µA average-load applications like IR remotes. |
| Shutdown Current | 0.01µA into BATT at +25°C; reduces system standby loss to negligible levels in always-on sensor nodes. |
| Startup Voltage | 0.91V (guaranteed at +25°C, RL = 3kΩ); allows functional operation even as primary cell voltage drops below 1.0V. |
| Efficiency | Up to 90% at 150mA load; maintains >80% efficiency down to 100µA due to PFM architecture and synchronous rectification. |
| Package | 5-pin TSOT (0.9mm height, 1.6mm × 1.6mm footprint); compatible with high-density PCB layouts and reflow assembly. |
Pinout & Package
MAX1724EZK27+T uses a 5-pin Thin SOT (TSOT) package with 0.65mm pitch and 0.9mm typical height. Pin 1 is unmarked corner adjacent to chamfered edge; pin numbering follows standard TSOT counterclockwise convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BATT | Battery input and damping switch connection | Accepts 0.8–5.5V input; powers startup circuit and hosts internal damping switch to suppress LX ringing and reduce EMI. |
| SHDN | Active-low shutdown control | Drives low (≤75mV) to enter 0.01µA shutdown; tolerates up to 6V logic high regardless of BATT/OUT voltage. |
| GND | Analog and power ground reference | Must be connected to low-impedance ground plane within 5mm of CIN/COUT grounds to minimize noise and ground bounce. |
| OUT | Regulated power output and bootstrap supply | Delivers up to 150mA at 2.7V; supplies internal gate drive; requires ≥10µF ceramic output capacitor for stability. |
| LX | Switch node (N-MOSFET drain / P-MOSFET drain) | Connects to external 10µH inductor; exhibits damped ringing during light load; must be routed short and away from sensitive analog traces. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated P-channel MOSFET eliminates external Schottky diode-reducing BOM cost and board area by ~2mm². |
| EMI suppression | Internal BATT-connected damping switch reduces LX ringing amplitude by >50%, easing EMC compliance without added components. |
| Ultra-low IQ architecture | 1.5µA quiescent current into OUT enables >10-year shelf life in battery-backed memory or real-time clock circuits. |
| Guaranteed low-voltage startup | 0.91V minimum startup (tested, not typical) ensures reliable wake-up from deeply discharged single-cell batteries. |
| Fixed-output precision | ±1% output tolerance over full temperature range eliminates need for post-production calibration in portable instrumentation. |
Applications
| Remote Controls | Personal Medical Sensors |
|---|---|
Use Scenario: Battery-powered infrared remote for smart home devices operating intermittently for years on AA/AAA cells. IC Role / Device Role / Timing Role: Primary voltage booster converting 1.0–1.5V alkaline cell output to stable 2.7V for microcontroller and IR LED driver. Use Value: 1.5µA quiescent current extends battery life beyond 5 years; 0.91V startup ensures functionality until cell voltage drops to 0.95V. |
Use Scenario: Disposable glucose monitor using coin-cell battery with strict 2-year shelf-life requirement before first use. IC Role / Device Role / Timing Role: Step-up regulator powering ADC, sensor interface, and BLE radio during brief measurement bursts. Use Value: 0.01µA shutdown current prevents measurable battery self-discharge during storage; TSOT-5 footprint fits <8mm² PCB area. |
| Digital Still Cameras | Low-Power Hand-Held Instruments |
Use Scenario: Compact point-and-shoot camera requiring flash LED boost from single Li+ cell (2.8–4.2V). IC Role / Device Role / Timing Role: Supplies 2.7V rail for image sensor bias and memory interface during capture sequence. Use Value: 90% peak efficiency minimizes thermal rise in sealed plastic housing; EMI suppression avoids interference with CMOS image sensor analog front-end. |
Use Scenario: Portable multimeter with auto-ranging and Bluetooth connectivity, powered by two AAA cells. IC Role / Device Role / Timing Role: Generates precise 2.7V reference rail for 16-bit ADC and LCD bias from declining 1.2–3.0V input. Use Value: ±1% output accuracy over –40°C to +85°C eliminates gain drift compensation; TSOT-5 allows placement near ADC input pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCT | Adjustable output (1.8–5.5V), higher 2.5µA IQ, no internal damping switch, 6-pin SON package. | Requires external feedback resistors; less suitable for space-constrained 2.7V-only designs; higher EMI risk without layout mitigation. | Select only if adjustable output or higher output current (>200mA) is required; verify EMI performance in final layout. |
| SP6641A-2.7TR | Fixed 2.7V output, 2.2µA IQ, no shutdown, 5-pin SOT-23 package, no EMI damping. | Lacks SHDN pin-cannot achieve sub-µA system sleep; no BATT damping switch increases radiated emissions in noisy environments. | Use only in cost-sensitive, non-regulated shutdown applications where EMI is not a compliance concern. |
Compared with TPS61200DRCT and SP6641A-2.7TR, the MAX1724EZK27+T uniquely combines fixed 2.7V precision, lowest quiescent current, integrated EMI suppression, and active shutdown-all in the smallest TSOT-5 footprint, making it optimal for battery longevity and regulatory certification in compact portable devices.
Availability
MAX1724EZK27+T is available at Aetrix Electronics and suitable for remote controls, personal medical sensors, and low-power hand-held instruments requiring stable component supply with long-term lifecycle assurance.
Supply support for MAX1724EZK27+T 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power management, sensing, and communication in constrained environments.
The MAX1722/MAX1723/MAX1724 family was engineered specifically for ultra-low-power, single-cell battery applications demanding minimal quiescent current, small footprint, and robust startup behavior under voltage sag.
FAQ
What is the guaranteed minimum startup voltage for MAX1724EZK27+T?
The MAX1724EZK27+T guarantees startup at 0.91V input (measured at +25°C with 3kΩ load), verified across production lots. This specification ensures reliable operation even as alkaline or NiMH cells discharge below 1.0V, and is enabled by the BATT-powered startup circuit-not the OUT pin.
Does MAX1724EZK27+T require external components for basic operation?
Yes-the MAX1724EZK27+T requires an external 10µH inductor between LX and VIN, a 10µF ceramic input capacitor at BATT, and a 10µF ceramic output capacitor at OUT. No feedback resistors are needed since the 2.7V output is internally fixed; the SHDN pin may be tied to BATT for always-on operation.
How does the internal damping switch in MAX1724EZK27+T reduce EMI?
The MAX1724EZK27+T's damping switch connects between BATT and LX during inductor flyback, providing a controlled path to dissipate resonant energy. This reduces peak-to-peak ringing amplitude at LX by >50% compared to undamped operation, lowering broadband radiated emissions without affecting output ripple or efficiency.
What is the maximum continuous output current of MAX1724EZK27+T?
The MAX1724EZK27+T delivers up to 150mA continuously at 2.7V output when VIN ≥ 1.5V and ambient temperature is ≤+70°C. At lower input voltages (e.g., 1.0V), maximum output current decreases to ~60mA due to duty-cycle and switch-current-limit constraints-see Figure toc04 in the datasheet.
Is MAX1724EZK27+T RoHS-compliant and lead-free?
Yes-MAX1724EZK27+T carries a "+" suffix indicating RoHS-compliant, lead-free construction. It is qualified for Pb-free reflow soldering at +260°C peak temperature per JEDEC J-STD-020, and its TSOT package meets IPC/JEDEC standard land patterns for automated assembly.
MAX1724EZK27+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- -
- Current - Output:
- 400mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MAX1724EZK27+T FAQ
1.How can I place an order for MAX1724EZK27+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1724EZK27+T 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 MAX1724EZK27+T reliable?
The price and inventory of MAX1724EZK27+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1724EZK27+T is usually 5 days.
3.What payment methods are accepted for MAX1724EZK27+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1724EZK27+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1724EZK27+T?
MAX1724EZK27+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1724EZK27+T 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 MAX1724EZK27+T?
For technical support, including MAX1724EZK27+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1724EZK27+T requirements.
6.How does Aetrix verify that MAX1724EZK27+T is sourced from the original manufacturer or authorized distributors?
All MAX1724EZK27+T 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 MAX1724EZK27+T meets industry standards.
7.What is the process for return or replacement of MAX1724EZK27+T?
All MAX1724EZK27+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1724EZK27+T, 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 MAX1724EZK27+T part is unused and in its original packaging.
Return procedure for MAX1724EZK27+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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