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Analog Devices Inc./Maxim Integrated MAX1724EZK33+T
- Part No.:
- MAX1724EZK33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX1724EZK33+T.pdf
- Description:
- IC REG BOOST 3.3V 400MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,094
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Product details
Overview
MAX1724EZK33+T from Maxim Integrated is a fixed-output 3.3V, synchronous step-up DC-DC converter in a 5-pin TSOT package, featuring 1.5μA quiescent current, 0.91V guaranteed startup voltage, ±1% output voltage accuracy, and integrated EMI suppression. It operates from 0.8V to 5.5V input and delivers up to 150mA output current for ultra-low-power single-cell battery systems.
For engineers reviewing the MAX1724EZK33+T datasheet, MAX1724EZK33+T pinout, MAX1724EZK33+T application, or MAX1724EZK33+T equivalent, key selection criteria include fixed 3.3V output, TSOT-5 footprint compatibility, shutdown control via SHDN pin, internal synchronous rectification, and low-voltage startup capability down to 0.91V.
Technical Context
The MAX1724EZK33+T uses a forced discontinuous, current-limited PFM control scheme with no oscillator-switching frequency varies dynamically with load. It integrates an N-channel power switch (0.5Ω RDS(ON)) and a P-channel synchronous rectifier, eliminating external diodes and reducing conduction losses.
A dedicated damping switch on the BATT pin suppresses LX node ringing to reduce EMI, while the low-voltage startup circuit draws power directly from BATT to guarantee operation at 0.91V input. Shutdown is active-low, drawing only 0.01μA at +25°C when asserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% over -40°C to +85°C - ensures stable rail for 3.3V logic without external feedback resistors. |
| Input Voltage Range | 0.8V to 5.5V - supports single alkaline/NiMH (0.9–1.6V) or Li+ (2.7–4.2V) cells without external biasing. |
| Quiescent Current | 1.5μA into OUT - enables >1-year battery life in always-on sensor nodes powered by CR2032 or AAA cells. |
| Startup Voltage | 0.91V min at +25°C - allows reliable boot from deeply discharged single-cell batteries before regulation begins. |
| Max Output Current | 150mA at VIN = 1.5V, VOUT = 3.3V - sufficient for BLE transceivers, OLED displays, or low-power microcontrollers. |
| Shutdown Current | 0.01μA into BATT at +25°C - preserves battery charge during extended sleep modes in portable medical devices. |
| Package | 5-pin TSOT (0.9mm height, 1.6mm × 1.6mm footprint) - enables compact PCB layouts in space-constrained wearables. |
Pinout & Package
MAX1724EZK33+T is housed in a 5-pin Thin SOT (TSOT) package with 0.65mm pitch, 1.6mm × 1.6mm body, and 0.9mm typical height. Pin 1 is marked by a dot or beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BATT | Battery input and damping switch connection | Primary power input; internal damping switch reduces EMI at LX node during light-load operation. |
| SHDN | Active-low shutdown control | Pull low (<400mV) to disable switching and reduce supply current to 0.01μA; tolerates up to 6V regardless of BATT/OUT voltage. |
| GND | Analog and power ground reference | Common return path for all internal circuits; must be connected to low-impedance ground plane within 5mm of CIN/COUT. |
| OUT | Regulated power output and bootstrap supply | Delivers 3.3V output; also powers internal gate drivers-requires 10μF ceramic capacitor placed adjacent to pin. |
| LX | Switch node (N-channel drain / P-channel drain) | Connects to inductor; high dv/dt node requiring short trace routing and minimal loop area to limit EMI radiation. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode-reduces BOM count, board area, and conduction loss by replacing ~0.3V diode drop with <0.2V MOSFET RDS(ON) drop. |
| Integrated EMI suppression | Damping switch on BATT pin actively quenches LX ringing-measurably lowers radiated emissions without adding ferrite beads or RC snubbers. |
| Ultra-low quiescent current | 1.5μA supply current enables >10-year shelf life in coin-cell-powered IoT sensors with infrequent wake-ups. |
| Guaranteed 0.91V startup | Starts regulation even when battery voltage drops below 1.0V-critical for maintaining functionality in aging primary cells. |
| Fixed 3.3V output | No external feedback resistors required-simplifies design, improves accuracy (±1%), and eliminates resistor tolerance drift effects. |
Applications
| Remote Wireless Transmitters | Pagers |
|---|---|
Use Scenario: Battery-powered sub-GHz RF modules transmitting telemetry every 5 minutes in industrial monitoring. IC Role / Device Role / Timing Role: Step-up regulator providing stable 3.3V rail to RF transceiver IC during brief 20ms transmit bursts. Use Value: 0.91V startup ensures continued operation until battery reaches 0.85V, extending usable battery life by 18% vs. competing converters. |
Use Scenario: Legacy two-way pagers using single AA alkaline cell with intermittent display and alert activation. IC Role / Device Role / Timing Role: Primary voltage booster supplying regulated 3.3V to LCD driver and audio amplifier during alert events. Use Value: 1.5μA quiescent current limits standby drain to <1nAh/hour-enabling 5+ years of shelf life before first use. |
| Personal Medical Devices | Low-Power Hand-Held Instruments |
Use Scenario: Portable blood glucose meters operating from one AAA alkaline cell with daily usage. IC Role / Device Role / Timing Role: Powers 3.3V ADC, microcontroller, and LCD backlight only during 30-second measurement cycles. Use Value: Active-low SHDN pin allows MCU to fully disable converter between tests-reducing average current to 0.01μA in sleep mode. |
Use Scenario: Pocket-sized multimeters with auto-ranging and backlit LCD, powered by single CR2032 coin cell. IC Role / Device Role / Timing Role: Generates precise 3.3V reference and digital supply for precision analog front-end and display controller. Use Value: ±1% output accuracy maintains ADC linearity across temperature, eliminating need for software calibration. |
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 |
|---|---|---|---|
| Texas Instruments TPS61200DRCT | Adjustable output (1.5–5.5V), higher 2.5μA quiescent current, no integrated EMI damping switch | Requires external feedback resistors; less suitable for space-constrained designs needing fixed 3.3V | Select when output voltage flexibility outweighs EMI reduction and ultra-low IQ requirements |
| Analog Devices ADP5070ARMZ-R7 | Higher 2.8μA IQ, 2.5V–15V input range, requires external MOSFETs and diodes, no BATT damping switch | Designed for higher input voltages and dual-output configurations-not optimized for single-cell <1V startup | Choose for multi-cell or wide-input applications where MAX1724EZK33+T's 0.91V startup is unnecessary |
Compared with TPS61200DRCT and ADP5070ARMZ-R7, the MAX1724EZK33+T uniquely combines fixed 3.3V output, 0.91V startup, 1.5μA IQ, and integrated EMI damping-making it optimal for miniaturized, single-cell, ultra-low-power systems where layout area and EMI compliance are critical.
Availability
MAX1724EZK33+T is available at Aetrix Electronics and suitable for remote wireless transmitters, personal medical devices, and low-power hand-held instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1724EZK33+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and consumer applications.
The MAX1722/MAX1723/MAX1724 family was designed specifically for ultra-low-power, single-cell battery-powered devices demanding minimal quiescent current, small footprint, and reliable low-voltage startup-targeting wearables, sensors, and portable instrumentation.
FAQ
What is the guaranteed minimum startup voltage for MAX1724EZK33+T?
The MAX1724EZK33+T guarantees startup at 0.91V input voltage at +25°C with no load, enabling operation from deeply discharged single-cell alkaline or NiMH batteries. This specification is validated across the full -40°C to +85°C operating temperature range, with typical startup voltage rising to 0.95V at +85°C per the datasheet's Typical Operating Characteristics curves.
Does MAX1724EZK33+T require external components for basic operation?
Yes, the MAX1724EZK33+T requires three external components for functional operation: a 10μH power inductor between LX and BATT, a 10μF ceramic input capacitor between BATT and GND, and a 10μF ceramic output capacitor between OUT and GND. No feedback resistors are needed due to its fixed 3.3V output configuration.
How does the SHDN pin function on MAX1724EZK33+T?
The SHDN pin on MAX1724EZK33+T is an active-low control input. Driving it below 400mV disables switching and reduces BATT supply current to 0.01μA at +25°C. The pin accepts logic-high voltages up to 6V independent of BATT or OUT voltage, allowing direct interface with 3.3V or 5V microcontrollers without level-shifting.
What package type and dimensions does MAX1724EZK33+T use?
The MAX1724EZK33+T uses a 5-pin Thin SOT (TSOT) package with outline number 21-0113, measuring 1.6mm × 1.6mm × 0.9mm (typical height). Pin pitch is 0.65mm, and the package is lead(Pb)-free and RoHS-compliant, marked "ADQJ" on the top surface.
Is MAX1724EZK33+T compatible with single Li+ cells?
Yes, the MAX1724EZK33+T supports input voltages from 0.8V to 5.5V, making it fully compatible with single Li+ cells (nominal 3.7V, range 2.7–4.2V). Its 3.3V fixed output provides ideal regulation for 3.3V microcontrollers and peripherals, and its low 1.5μA quiescent current minimizes standby drain during deep-sleep modes.
MAX1724EZK33+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):
- 3.3V
- 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
MAX1724EZK33+T FAQ
1.How can I place an order for MAX1724EZK33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1724EZK33+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 MAX1724EZK33+T reliable?
The price and inventory of MAX1724EZK33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1724EZK33+T is usually 5 days.
3.What payment methods are accepted for MAX1724EZK33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1724EZK33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1724EZK33+T?
MAX1724EZK33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1724EZK33+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 MAX1724EZK33+T?
For technical support, including MAX1724EZK33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1724EZK33+T requirements.
6.How does Aetrix verify that MAX1724EZK33+T is sourced from the original manufacturer or authorized distributors?
All MAX1724EZK33+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 MAX1724EZK33+T meets industry standards.
7.What is the process for return or replacement of MAX1724EZK33+T?
All MAX1724EZK33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1724EZK33+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 MAX1724EZK33+T part is unused and in its original packaging.
Return procedure for MAX1724EZK33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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