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Analog Devices Inc./Maxim Integrated MAX1724ELT27+T
- Part No.:
- MAX1724ELT27+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN
- Datasheet:
-
MAX1724ELT27+T.pdf
- Description:
- IC REG BOOST 2.7V 400MA 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,618
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Product details
Overview
The MAX1724ELT27+T from Maxim Integrated is a fixed-output 2.7V, high-efficiency step-up DC-DC converter in a 6-pin µDFN package (2mm × 2mm × 0.75mm), featuring 1.5μA quiescent current, ±1% output voltage accuracy over temperature, 0.91V guaranteed startup, and integrated EMI suppression. It operates from 0.8V to 5.5V input and delivers up to 150mA output current, ideal for single-cell battery-powered medical sensors and remote wireless transmitters.
For engineers reviewing the MAX1724ELT27+T datasheet, MAX1724ELT27+T pinout, MAX1724ELT27+T application, or MAX1724ELT27+T equivalent, key selection criteria include ultra-low IQ, fixed 2.7V output with tight tolerance, shutdown current ≤0.5μA at +25°C, internal synchronous rectification eliminating external diodes, and compatibility with low-input-voltage alkaline/NiMH/Li+ cells.
Technical Context
The MAX1724ELT27+T uses a forced discontinuous, current-limited pulse-frequency-modulation (PFM) control scheme with no oscillator-switching frequency varies dynamically with load. Its 0.5Ω N-channel power switch and P-channel synchronous rectifier enable high efficiency without external components.
It integrates a damping switch on the BATT pin to suppress LX node ringing and reduce EMI, and features a dedicated low-voltage startup circuit powered from BATT, guaranteeing operation down to 0.91V input at +25°C. Shutdown is active-low with logic thresholds of 75mV (VIL) and 800mV (VIH).
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 stable biasing of 2.7V logic or analog rails without feedback resistors. |
| Input Voltage Range | 0.8V to 5.5V; supports direct operation from one alkaline/NiMH cell (0.9–1.6V) or single Li+ cell (2.7–4.2V). |
| Quiescent Current | 1.5μA into OUT (typical); ensures >85% light-load efficiency at 100μA output, critical for multi-year battery life. |
| Shutdown Current | 0.01μA into BATT at +25°C; reduces system standby drain to sub-nA levels when paired with external load switches. |
| Startup Voltage | 0.91V guaranteed at +25°C (no load); allows reliable wake-up from deeply discharged batteries before regulation begins. |
| Max Output Current | 150mA at VIN = 1.5V, VOUT = 2.7V; sufficient for driving RF transceivers, OLED displays, or sensor signal chains. |
| Package | 6-pin µDFN (2mm × 2mm × 0.75mm); enables compact PCB layout with thermal pad for enhanced power dissipation in space-constrained wearables. |
Pinout & Package
MAX1724ELT27+T is housed in a 6-pin µDFN package (outline 21-0164, land pattern 90-0004) with exposed thermal pad. Pin 1 is marked by a dot; top marking is "ADJ".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BATT | Battery input and damping switch connection | Accepts 0.8–5.5V input; internal damping switch suppresses LX ringing to meet Class B EMI limits without added snubbers. |
| SHDN | Active-low shutdown control | Pulled low (<75mV) disables switching; pulled high (>800mV) enables operation; tolerates up to 6V regardless of BATT/OUT voltage. |
| GND | Power and signal reference ground | Must be connected to low-impedance ground plane within 5mm of CIN/COUT to minimize noise coupling and ground bounce. |
| FB | Feedback input | Not used on MAX1724ELT27+T (fixed-output variant); left unconnected per datasheet; internally tied to 1.235V reference. |
| OUT | Regulated power output and bootstrap supply | Delivers 2.7V @ up to 150mA; also powers internal gate drivers-requires ≥10μF ceramic capacitor for stability. |
| LX | Switch node (N-FET drain / P-FET drain) | Connects to inductor; exhibits damped ringing due to internal BATT-switch clamp; requires short, low-inductance trace to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates need for external Schottky diode-reduces BOM count, board area, and conduction losses by ~0.3V drop reduction. |
| Internal EMI suppression | Damping switch on BATT pin actively quenches LX ringing, lowering radiated emissions without ferrite beads or RC snubbers. |
| Ultra-low quiescent current | 1.5μA IQ enables >10-year battery life in 10mA-hr coin cells powering intermittent-sense applications (e.g., BLE beacons). |
| Guaranteed 0.91V startup | Starts regulation from single NiMH cell at end-of-discharge (≤1.0V), extending usable battery capacity by 15–20%. |
| Fixed 2.7V output accuracy | ±1% over –40°C to +85°C ensures consistent ADC reference or MCU I/O voltage without calibration drift. |
Applications
| Medical Sensor Nodes | Remote Wireless Transmitters |
|---|---|
Use Scenario: Wearable glucose monitor using CR2032 coin cell and low-power ADC. IC Role / Device Role / Timing Role: Step-up regulator providing stable 2.7V rail for precision analog front-end and BLE radio during 10ms burst transmissions. Use Value: 1.5μA IQ extends CR2032 lifetime beyond 3 years; 0.91V startup ensures operation until battery reaches 0.95V. |
Use Scenario: Battery-powered industrial temperature sensor transmitting data every 5 minutes via sub-GHz RF module. IC Role / Device Role / Timing Role: Supplies 2.7V to RF IC and microcontroller during 200ms active transmit window; shuts down between intervals. Use Value: 0.01μA shutdown current minimizes idle drain; EMI suppression avoids interference with sensitive RF receive bands. |
| Low-Power Hand-Held Instruments | Digital Still Cameras (Compact) |
Use Scenario: Pocket-sized multimeter powered by two AAA alkaline cells. IC Role / Device Role / Timing Role: Generates 2.7V for LCD bias and op-amp rails during measurement; handles input voltage decay from 3.0V to 1.2V. Use Value: Wide 0.8–5.5V input range accommodates full battery discharge curve; TSOT/µDFN footprint saves space in slim enclosure. |
Use Scenario: Keychain-sized camera with CMOS image sensor and flash LED. IC Role / Device Role / Timing Role: Powers 2.7V sensor interface and memory buffer during image capture; supplies peak current for LED flash assist. Use Value: 150mA output supports brief 100mA flash pulses; synchronous rectification improves efficiency over discrete boost solutions. |
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 |
|---|---|---|---|
| TPS61200DRCR | Adjustable output (1.8–5.5V); 2.5μA IQ; no internal EMI damping; 5-pin TSOT23 package. | Requires external feedback resistors; less suitable for EMI-sensitive RF modules without added filtering. | Select when adjustable output or smaller TSOT23 footprint is prioritized over lowest IQ or EMI performance. |
| SP6641A-2.7TR | Fixed 2.7V output; 2.2μA IQ; no shutdown; 5-pin SOT23 package; no EMI suppression. | Lacks SHDN pin-requires external MOSFET for system-level power gating; higher IQ reduces battery life in duty-cycled apps. | Choose only for cost-sensitive, non-shutdown applications where EMI and ultra-low IQ are secondary concerns. |
Compared with TPS61200DRCR and SP6641A-2.7TR, the MAX1724ELT27+T uniquely combines fixed 2.7V ±1% accuracy, 1.5μA IQ, active-low shutdown, and integrated EMI damping-making it optimal for space-constrained, battery-critical, and RF-cohabitant designs.
Availability
MAX1724ELT27+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 across long product lifecycles.
Supply support for MAX1724ELT27+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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX1722/MAX1723/MAX1724 family was engineered specifically for ultra-low-power, single-cell battery systems where minimal quiescent current, small size, and EMI robustness are mandatory design constraints.
FAQ
What is the guaranteed minimum startup voltage for MAX1724ELT27+T?
The MAX1724ELT27+T guarantees startup at 0.91V input voltage at +25°C with no load, as confirmed in the Electrical Characteristics table. This value degrades slightly to 0.95V at +85°C and improves to 0.83V at 0°C, enabling reliable operation across the full –40°C to +85°C temperature range even with deeply discharged batteries.
Does MAX1724ELT27+T require external feedback resistors?
No, the MAX1724ELT27+T is a fixed-output variant with internal feedback network set to 2.7V. The FB pin is not connected externally and must remain unpopulated per the datasheet; using it would disrupt regulation. This eliminates resistor tolerance errors and saves PCB area versus adjustable alternatives like MAX1722.
How does the internal damping switch in MAX1724ELT27+T reduce EMI?
The MAX1724ELT27+T's damping switch connects between BATT and LX during inductor flyback, providing a low-impedance path to dissipate resonant energy that causes high-frequency ringing. This suppresses radiated EMI peaks above 30MHz without adding external components-verified in Figure 6 of the datasheet.
What is the maximum continuous output current of MAX1724ELT27+T at 1.2V input?
At VIN = 1.2V and VOUT = 2.7V, the MAX1724ELT27+T delivers up to 85mA continuous output current, as derived from the "Maximum Output Current vs. Input Voltage" graph (Figure toc04) and confirmed by efficiency curves showing >75% efficiency at this point. Higher currents require ≥1.5V input.
Can MAX1724ELT27+T be used with a single Li+ cell?
Yes-the MAX1724ELT27+T supports input voltages from 0.8V to 5.5V, fully covering the 2.7V–4.2V discharge range of a single Li+ cell. Its 2.7V fixed output matches common Li+ cutoff voltages, making it ideal for applications needing regulated 2.7V rail after battery protection circuitry.
MAX1724ELT27+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN
- 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:
- 6-µDFN (2x2)
MAX1724ELT27+T FAQ
1.How can I place an order for MAX1724ELT27+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1724ELT27+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 MAX1724ELT27+T reliable?
The price and inventory of MAX1724ELT27+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1724ELT27+T is usually 5 days.
3.What payment methods are accepted for MAX1724ELT27+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1724ELT27+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1724ELT27+T?
MAX1724ELT27+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1724ELT27+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 MAX1724ELT27+T?
For technical support, including MAX1724ELT27+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1724ELT27+T requirements.
6.How does Aetrix verify that MAX1724ELT27+T is sourced from the original manufacturer or authorized distributors?
All MAX1724ELT27+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 MAX1724ELT27+T meets industry standards.
7.What is the process for return or replacement of MAX1724ELT27+T?
All MAX1724ELT27+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1724ELT27+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 MAX1724ELT27+T part is unused and in its original packaging.
Return procedure for MAX1724ELT27+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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