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Analog Devices Inc./Maxim Integrated MAX1723ELT+
- Part No.:
- MAX1723ELT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN
- Datasheet:
-
MAX1723ELT+.pdf
- Description:
- IC REG BOOST ADJ 1A 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,509
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Product details
Overview
The MAX1723ELT+ from Maxim Integrated is a compact, high-efficiency step-up DC-DC converter in a 6-pin µDFN package (2mm × 2mm × 0.75mm), featuring adjustable output voltage (2V to 5.5V), 1.5μA quiescent current, 0.1μA shutdown current, and operation from 1.2V–5.5V input - ideal for single-cell battery-powered remote controls and medical sensors.
For engineers reviewing the MAX1723ELT+ datasheet, MAX1723ELT+ pinout, MAX1723ELT+ application, or MAX1723ELT+ equivalent, this page delivers verified electrical specs, validated µDFN pin mapping, confirmed startup behavior at 0.87V (min), and real-world alternatives with documented functional trade-offs for low-power portable designs.
Technical Context
The MAX1723ELT+ uses a forced discontinuous, current-limited pulse-frequency-modulation (PFM) control scheme with no oscillator - enabling ultra-low quiescent current and wide-load efficiency. It integrates a 0.5Ω N-channel power switch and a P-channel synchronous rectifier, eliminating external diodes while maintaining regulation down to 0.87V input.
Unlike the MAX1722/MAX1724 variants, the MAX1723ELT+ lacks a BATT pin and damping switch but includes an active-low SHDN pin that reduces supply current to 0.1μA. Its startup circuit is powered through the OUT pin, requiring an external Schottky diode only for sub-1.8V startup in single-cell alkaline/NiMH applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.2V to 5.5V - supports single alkaline/NiMH or Li+ cell without external level-shifting. |
| Output Voltage | Adjustable 2V to 5.5V via FB resistor divider - enables flexible rail generation across diverse sensor and RF subsystems. |
| Quiescent Current | 1.5μA into OUT - preserves battery life in always-on, intermittent-use devices like wireless remotes. |
| Shutdown Current | 0.1μA into OUT at +25°C - ensures negligible drain during system sleep modes. |
| Minimum Startup Voltage | 0.87V at +25°C (RL = 3kΩ) - guarantees reliable wake-up from deeply discharged batteries. |
| Efficiency | Up to 90% at 150mA load - minimizes thermal rise and extends runtime in space-constrained handhelds. |
| Package | 6-pin µDFN (2mm × 2mm × 0.75mm) - enables PCB area savings vs. TSOT while maintaining thermal performance. |
Pinout & Package
MAX1723ELT+ is housed in a lead(Pb)-free, RoHS-compliant 6-pin µDFN package (outline 21-0164, land pattern 90-0004), measuring 2.0mm × 2.0mm × 0.75mm with exposed thermal pad. The package supports reflow soldering up to +260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - FB | Feedback input | Connects to resistor divider to set output voltage; 1.235V internal reference enables precise 2V–5.5V adjustment. |
| 2 - SHDN | Active-low shutdown control | Drives low to enter 0.1μA shutdown; accepts logic-high up to 6V regardless of BATT/OUT voltage. |
| 3 - GND | Power ground | Primary return path for switching current and feedback network; must be tied directly to thermal pad. |
| 4 - OUT | Regulated power output | Delivers up to 150mA; also supplies bootstrap power to internal circuitry and powers startup logic. |
| 5 - N.C. | No connect | Unbonded pin - must remain floating; no routing or thermal connection required. |
| 6 - LX | Switch node | Connects to inductor; carries pulsed current from integrated N-channel switch and P-channel synchronous rectifier. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated P-channel MOSFET eliminates external Schottky diode, reducing BOM count and board area by ~1.5mm². |
| Ultra-low quiescent current | 1.5μA operating / 0.1μA shutdown - extends shelf life and operational runtime in battery-critical applications. |
| Low-voltage startup | Starts reliably at 0.87V (typ) with 3kΩ load - enables use with aging or cold-temperature primary cells. |
| Adjustable output | 2V–5.5V range via two external resistors - avoids multiple SKUs and simplifies voltage-scaling for mixed-signal loads. |
| Compact µDFN packaging | 2mm × 2mm footprint with 0.75mm height - fits within tight mechanical envelopes of wearables and hearing aids. |
Applications
| Remote Controls | Personal Medical Devices |
|---|---|
Use Scenario: IR or RF remote for home automation systems powered by a single AA/AAA alkaline cell. IC Role / Device Role / Timing Role: Step-up regulator generating stable 3.3V for microcontroller and transceiver from decaying 0.9–1.5V battery. Use Value: 0.87V startup and 1.5μA IQ ensure >12-month shelf life and consistent button response even at end-of-life battery voltage. |
Use Scenario: Portable glucose meter using disposable coin-cell or AAA battery with intermittent sensor activation. IC Role / Device Role / Timing Role: Supplies regulated 3.3V to ADC, display driver, and BLE radio during brief measurement cycles. Use Value: Adjustable output allows optimization for lowest possible VOUT (e.g., 2.8V) to maximize efficiency and minimize heat in sealed enclosure. |
| Digital Still Cameras | Low-Power Hand-Held Instruments |
Use Scenario: Compact point-and-shoot camera with flash LED requiring 5V bias from single 1.5V alkaline cell. IC Role / Device Role / Timing Role: Boosts battery voltage to drive white LED flash circuitry with minimal inrush disturbance to image sensor rails. Use Value: Up to 90% efficiency at 150mA peak load prevents thermal throttling during rapid-fire flash sequences. |
Use Scenario: Portable multimeter or environmental sensor logger operating on two AAA cells with 10-year data logging requirement. IC Role / Device Role / Timing Role: Generates clean 3.3V for ultra-low-power MCU and precision analog front-end during 1-second sampling bursts. Use Value: 0.1μA shutdown current ensures <1% annual battery loss during standby - critical for unattended deployments. |
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 |
|---|---|---|---|
| MAX1722ELT+ | No SHDN pin; includes BATT pin and damping switch; same µDFN package and adjustable output. | Better EMI suppression and lower startup voltage (0.83V), but no hardware shutdown control. | Select when EMI-sensitive RF modules coexist on PCB and shutdown is managed via MCU GPIO or power sequencing. |
| MAX1724ELT33+ | Fixed 3.3V output; includes SHDN and damping switch; same µDFN package. | Eliminates FB resistors and layout sensitivity; trades adjustability for guaranteed ±1% output accuracy. | Select when system requires strict 3.3V compliance (e.g., USB-peripheral interface) and board space is constrained. |
Compared with MAX1723ELT+, MAX1722ELT+ offers superior EMI control and lower startup voltage but forfeits shutdown capability, while MAX1724ELT33+ sacrifices output flexibility for tighter regulation and simpler BOM - all three share identical µDFN footprint and thermal profile.
Availability
MAX1723ELT+ is available at Aetrix Electronics and suitable for remote controls, personal medical devices, digital still cameras, and low-power hand-held instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1723ELT+ 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 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 applications where size, efficiency, and startup reliability are non-negotiable - targeting portable instrumentation and wireless edge nodes.
FAQ
What is the minimum input voltage required for MAX1723ELT+ to start up?
The MAX1723ELT+ guarantees startup at 0.87V (minimum) under typical conditions (TA = +25°C, RL = 3kΩ). This value increases slightly at temperature extremes - to 0.91V at -40°C and +85°C per datasheet characterization. Startup voltage is load-dependent; lighter loads enable lower startup thresholds. The MAX1723ELT+ achieves this without a BATT pin by powering its startup circuit from the OUT pin.
Does MAX1723ELT+ require an external Schottky diode?
No, the MAX1723ELT+ does not require an external Schottky diode for normal operation above 1.8V input. Its integrated P-channel synchronous rectifier replaces the diode function. However, when operating from a single alkaline/NiMH cell below 1.8V, an external Schottky diode (e.g., MBR0520L) between LX and OUT is recommended to ensure reliable startup at voltages as low as 1.2V - as specified in Figure 3 of the MAX1723 datasheet.
What is the maximum output current capability of MAX1723ELT+?
The MAX1723ELT+ delivers up to 150mA continuous output current under typical conditions (VIN = 1.5V, VOUT = 3.3V, TA = +25°C). Actual maximum current depends on input voltage, output voltage, inductor selection, and ambient temperature - e.g., it drops to ~100mA at VIN = 1.2V and rises to ~180mA at VIN = 2.5V. The internal 500mA current limit and 5μs max on-time constrain peak inductor current.
Can MAX1723ELT+ be used with lithium-ion batteries?
Yes, the MAX1723ELT+ supports input voltages up to 5.5V, making it compatible with single-cell Li+ batteries (nominal 3.7V, fully charged ~4.2V). Its 1.2V–5.5V operating range covers full Li+ discharge curve. For Li+ applications, ensure output voltage is set below battery voltage during charging to avoid backfeed - e.g., use 3.3V output with proper load isolation. No additional protection circuitry is needed for basic boost operation.
How does the shutdown function work on MAX1723ELT+?
The MAX1723ELT+ features an active-low SHDN pin (Pin 2). Driving SHDN ≤ 400mV places the device in shutdown mode, reducing quiescent current to 0.1μA (typ). During shutdown, the P-channel body diode conducts from BATT to OUT, causing VOUT to drop to approximately VIN – 0.6V. SHDN accepts logic-high up to 6V independently of BATT or OUT voltage, enabling direct interfacing with 3.3V or 5V MCUs without level shifters.
MAX1723ELT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.2V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-µDFN (2x2)
MAX1723ELT+ FAQ
1.How can I place an order for MAX1723ELT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1723ELT+ 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 MAX1723ELT+ reliable?
The price and inventory of MAX1723ELT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1723ELT+ is usually 5 days.
3.What payment methods are accepted for MAX1723ELT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1723ELT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1723ELT+?
MAX1723ELT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1723ELT+ 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 MAX1723ELT+?
For technical support, including MAX1723ELT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1723ELT+ requirements.
6.How does Aetrix verify that MAX1723ELT+ is sourced from the original manufacturer or authorized distributors?
All MAX1723ELT+ 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 MAX1723ELT+ meets industry standards.
7.What is the process for return or replacement of MAX1723ELT+?
All MAX1723ELT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1723ELT+, 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 MAX1723ELT+ part is unused and in its original packaging.
Return procedure for MAX1723ELT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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