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Analog Devices Inc./Maxim Integrated MAX1723EZK+T
- Part No.:
- MAX1723EZK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX1723EZK+T.pdf
- Description:
- IC REG BOOST ADJ 400MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,913
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Product details
Overview
MAX1723EZK+T from Maxim Integrated is a compact, high-efficiency step-up DC-DC converter in a 5-pin TSOT package, featuring 1.5μA quiescent supply current, 0.1μA logic-controlled shutdown, ±1% output voltage accuracy, and support for adjustable output (2V to 5.5V) with internal synchronous rectification. It is designed for single-cell battery-powered devices such as remote controls and personal medical instruments.
For engineers reviewing the MAX1723EZK+T datasheet, MAX1723EZK+T pinout, MAX1723EZK+T application, or MAX1723EZK+T equivalent, key selection criteria include startup voltage (0.87V min), input range (1.2V–5.5V), shutdown threshold (75mV to 400mV), feedback voltage (1.21V–1.26V), and absence of internal damping switch-critical for EMI-sensitive low-power portable designs.
Technical Context
The MAX1723EZK+T employs a forced discontinuous, current-limited pulse-frequency-modulation (PFM) control scheme with no oscillator, relying on inductor current limiting (400–620mA) and maximum on-time (3.5–6.5μs) for regulation. Its shutdown function is active-low, enabling ultra-low 0.1μA shutdown current at +25°C.
Unlike MAX1722/MAX1724 variants, the MAX1723EZK+T lacks an internal damping switch and BATT pin, instead powering its startup circuit through the OUT pin-requiring an external Schottky diode for reliable startup below 1.8V input. It uses a resistor-divider network on FB to set output voltage and integrates both N-channel (0.5Ω typ) and P-channel (1.0Ω typ) MOSFETs for synchronous rectification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.2V to 5.5V - supports single alkaline/NiMH or Li+ cell operation without external level-shifting |
| Quiescent Current | 1.5μA into OUT - enables >90% light-load efficiency in battery-critical applications |
| Shutdown Current | 0.01μA at +25°C - extends shelf life and standby time in always-on sensor nodes |
| Output Voltage Accuracy | ±1% - ensures stable rail for precision analog or RF front-end circuits |
| Feedback Voltage | 1.21V to 1.26V - defines regulated output via external resistor divider (R1/R2) |
| Startup Input Voltage | 0.87V min at +25°C - allows operation down to near-dead battery states when paired with external Schottky diode |
| N-Channel RDS(ON) | 0.5Ω typical - minimizes conduction loss during boost switching cycle |
| Switch Current Limit | 400–620mA - sets peak inductor current and constrains maximum output capability |
Pinout & Package
Package: 5-pin TSOT (0.9mm typical height, 1.6mm × 1.6mm footprint), RoHS-compliant, tape-and-reel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BATT | Not connected (N.C.) | No internal connection - MAX1723EZK+T omits BATT pin present in MAX1722/MAX1724; startup powered from OUT |
| SHDN | Active-low shutdown control | Drives low ≤400mV to enter 0.1μA shutdown; tolerates up to 6V regardless of VIN or VOUT |
| GND | Analog/digital ground reference | Common return path for feedback, shutdown, and power stage; must be low-impedance for stability |
| FB | Feedback input for output regulation | Monitors divided output voltage; 1.21–1.26V reference sets VOUT = VFB × (1 + R1/R2) |
| OUT | Power output and bootstrap supply | Delivers regulated output; powers internal circuitry and startup logic - critical for low-VIN operation |
| LX | Switch node | Connects to inductor; carries pulsed current; requires short, low-inductance layout to minimize EMI |
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 supply current enables >1-year battery life in 10μA average-load IoT sensors |
| Adjustable output voltage | 2V to 5.5V range via external resistors - supports multiple system rails from one BOM variant |
| Low-voltage startup | 0.87V minimum start-up (with external Schottky) - extends usable battery range beyond competing fixed-output boosters |
| PFM control architecture | No oscillator; variable frequency operation maintains >80% efficiency from 10μA to 150mA load |
| Logic-compatible shutdown | 0.1μA shutdown current and 75–400mV VIL threshold enable direct interface with GPIOs of ultra-low-power MCUs |
Applications
| Remote Controls | Pagers |
|---|---|
Use Scenario: Battery-powered infrared or RF remotes requiring long shelf life and instant-on response after months of storage. IC Role / Device Role / Timing Role: Step-up converter generating stable 3.3V rail from single 1.5V alkaline cell; regulates during button-press load transients. Use Value: 1.5μA quiescent current and 0.1μA shutdown extend battery life to >2 years; adjustable output supports legacy 2.8V or modern 3.3V MCU cores. | Use Scenario: Compact two-way pagers operating on single NiMH cells with intermittent receive/transmit duty cycles. IC Role / Device Role / Timing Role: Primary power regulator delivering 3.0V/100mA bursts to RF transceiver and display driver during alert events. Use Value: 0.87V startup ensures operation until battery drops below 0.9V; PFM mode maintains >85% efficiency across 10μA–100mA load range. |
| Personal Medical Devices | Low-Power Hand-Held Instruments |
Use Scenario: Portable glucose meters or pulse oximeters powered by coin-cell or AAA batteries with strict leakage-current limits. IC Role / Device Role / Timing Role: Supplies precise 2.5V analog reference and 3.3V digital rail from 1.2V–1.5V input; activated only during measurement sequence. Use Value: ±1% output accuracy ensures ADC linearity; 0.1μA shutdown prevents battery drain during 99% idle time. | Use Scenario: Field-service multimeters or thermal imagers using AA batteries and requiring rapid wake-from-sleep response. IC Role / Device Role / Timing Role: Generates 5.0V rail for LCD backlight and op-amp signal chain from single 1.5V alkaline cell. Use Value: Adjustable output allows 5.0V configuration via R1/R2; TSOT package enables <25mm² total solution size including inductor and caps. |
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 |
|---|---|---|---|
| MAX1722EZK+T | Includes BATT pin and internal damping switch; no shutdown; fixed or adjustable output | Better EMI performance in noise-sensitive RF modules; unsuitable where logic-controlled shutdown is required | Select MAX1722EZK+T only if shutdown is unnecessary and LX ringing suppression is critical |
| MAX1724EZK33+T | Fixed 3.3V output; includes SHDN and damping switch; same TSOT-5 package | Eliminates external feedback resistors; trades adjustability for reduced component count and faster design-in | Choose MAX1724EZK33+T when 3.3V rail is fixed and EMI reduction is prioritized over output flexibility |
Compared with MAX1722EZK+T, the MAX1723EZK+T adds shutdown control but sacrifices damping and BATT pin functionality-making it optimal for space-constrained, intermittently active systems where external diode-assisted startup is acceptable. Versus MAX1724EZK33+T, it offers voltage adjustability at the cost of added resistor network and slightly higher EMI risk.
Availability
MAX1723EZK+T is available at Aetrix Electronics and suitable for remote controls, personal medical devices, and low-power hand-held instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1723EZK+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 MAX172x family was designed specifically for ultra-low-power, single-cell battery applications demanding minimal quiescent current, small footprint, and reliable low-voltage startup-targeting portable instrumentation and wireless edge nodes.
FAQ
What is the minimum input voltage required for MAX1723EZK+T to start up?
The MAX1723EZK+T guarantees startup at 0.87V (min) at +25°C with an external Schottky diode installed between LX and OUT. Without the diode, startup is not assured below 1.8V due to reliance on OUT pin for startup circuit power. This behavior is confirmed in the datasheet's "Low-Voltage Startup Circuit" section and Figure 3 schematic.
Does MAX1723EZK+T include an internal damping switch for EMI reduction?
No, the MAX1723EZK+T does not include an internal damping switch. Unlike MAX1722/MAX1724 variants, it lacks this feature-confirmed in the Selector Guide table and "BATT/Damping Switch" section. Designers must rely on layout optimization and external filtering to meet EMI requirements.
What is the function of the BATT pin on MAX1723EZK+T?
The MAX1723EZK+T has no BATT pin. Pin 1 is unconnected (N.C.), as explicitly stated in the Pin Description table and Selector Guide. Its startup circuit is powered from the OUT pin-not BATT-distinguishing it from MAX1722/MAX1724 and necessitating external diode use for sub-1.8V operation.
Can MAX1723EZK+T be used to generate 5.0V output from a 1.5V input?
Yes, the MAX1723EZK+T supports output voltages up to 5.5V via external feedback resistors (R1/R2). With a 1.5V input, it delivers up to ~100mA at 5.0V (per Typical Operating Characteristics curves), though efficiency drops to ~75% at full load-verified in Figure toc01 (EFFICIENCY vs. LOAD CURRENT, VOUT = 5.0V).
What is the shutdown threshold voltage range for MAX1723EZK+T?
The SHDN pin of MAX1723EZK+T has a guaranteed low threshold (VIL) of 75mV to 400mV and high threshold (VIH) of 500mV to 800mV, per Electrical Characteristics tables. This allows direct interfacing with 1.8V or 3.3V GPIOs without level-shifting, and ensures robust noise immunity in noisy portable environments.
MAX1723EZK+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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 5.5V
- 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
MAX1723EZK+T FAQ
1.How can I place an order for MAX1723EZK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1723EZK+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 MAX1723EZK+T reliable?
The price and inventory of MAX1723EZK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1723EZK+T is usually 5 days.
3.What payment methods are accepted for MAX1723EZK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1723EZK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1723EZK+T?
MAX1723EZK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1723EZK+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 MAX1723EZK+T?
For technical support, including MAX1723EZK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1723EZK+T requirements.
6.How does Aetrix verify that MAX1723EZK+T is sourced from the original manufacturer or authorized distributors?
All MAX1723EZK+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 MAX1723EZK+T meets industry standards.
7.What is the process for return or replacement of MAX1723EZK+T?
All MAX1723EZK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1723EZK+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 MAX1723EZK+T part is unused and in its original packaging.
Return procedure for MAX1723EZK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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