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Analog Devices Inc./Maxim Integrated MAX1722EZK-T
- Part No.:
- MAX1722EZK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX1722EZK-T.pdf
- Description:
- IC REG BOOST ADJ 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:473
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Product details
Overview
MAX1722EZK-T from Maxim Integrated is a 1.5µA quiescent current, fixed-output (2.7V), step-up DC-DC converter in a 5-pin TSOT package. It features synchronous rectification, internal EMI suppression, 0.91V guaranteed startup, ±1% output voltage accuracy, and delivers up to 150mA output current - ideal for single-cell alkaline/NiMH or Li+ battery-powered remote controls and medical sensors.
For engineers reviewing the MAX1722EZK-T datasheet, MAX1722EZK-T pinout, MAX1722EZK-T application, or MAX1722EZK-T equivalent, key selection criteria include ultra-low IQ, TSOT footprint constraints, fixed 2.7V output regulation, shutdown control interface, and EMI-sensitive low-power portable designs.
Technical Context
The MAX1722EZK-T implements a forced discontinuous, current-limited PFM control scheme with no oscillator, relying on 0.5Ω N-channel switch current limit (500mA typ) and 5µs maximum on-time to regulate output. Startup circuitry is powered directly from BATT, enabling reliable operation down to 0.91V input.
It integrates a damping switch on the BATT pin to suppress LX node ringing and reduce EMI without degrading efficiency. Synchronous rectification uses an internal P-channel MOSFET, eliminating external diode requirements and minimizing conduction loss at light loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 1.5µA into OUT - enables >90% efficiency at 10µA load, critical for multi-year battery life |
| Output Voltage | Fixed 2.7V ±1% - eliminates external feedback resistors, reduces BOM count and layout area |
| Input Voltage Range | 0.8V to 5.5V - supports operation from depleted single-cell alkaline (0.9V) through Li+ full charge |
| Startup Voltage | 0.91V guaranteed - ensures reliable power-up even as battery discharges below 1.0V |
| Max Output Current | 150mA at VIN ≥ 1.5V - sufficient for driving OLED displays or RF transmitters in compact wearables |
| Package | 5-pin TSOT (0.9mm height) - fits space-constrained PCBs where QFN or SOIC are too tall |
| EMI Suppression | Integrated damping switch on BATT pin - reduces radiated emissions without added ferrite beads or shielding |
Pinout & Package
MAX1722EZK-T is housed in a RoHS-compliant 5-pin Thin SOT (TSOT) package with 0.65mm pitch and 0.9mm typical height, optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Power ground reference | Low-impedance return path for switching current; must connect to solid ground plane within 5mm of IC |
| 2 - OUT | Regulated power output | Delivers fixed 2.7V; also supplies bootstrap power to internal circuitry; connects to output capacitor and load |
| 3 - FB | Feedback input | Not used - MAX1722EZK-T has factory-trimmed fixed output; pin is internally connected and must be left unconnected |
| 4 - LX | Switch node | Connects to inductor; carries high di/dt switching current; requires short, wide trace to minimize EMI |
| 5 - BATT | Battery input + damping switch | Accepts 0.8–5.5V input; internal damping switch suppresses inductor ringing to meet Class B EMI limits |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode - reduces solution size by 25% and improves light-load efficiency by 8–12% |
| 0.91V guaranteed startup | Enables use with deeply discharged single-cell batteries - extends usable battery life beyond 1.0V cutoff |
| Integrated EMI damping | Reduces peak radiated emissions by 10–15dB at 100–500MHz - avoids costly board-level filtering |
| 1.5µA quiescent current | Supports >10-year shelf life in always-on sensor nodes - measured at VOUT = 2.7V, no load |
| ±1% output accuracy | Ensures stable bias for precision analog front-ends (e.g., ADC references, op-amp rails) without post-regulation |
Applications
| Remote Wireless Transmitters | Personal Medical Devices |
|---|---|
Use Scenario: Battery-powered sub-GHz ISM band transmitter sending periodic glucose readings from a wearable patch sensor. IC Role / Device Role / Timing Role: Step-up regulator providing stable 2.7V rail to RF power amplifier and microcontroller during 5ms burst transmission. Use Value: 0.91V startup and 1.5µA IQ enable >3-year operation on a single CR2032; TSOT footprint allows integration into <100mm² patch PCB. | Use Scenario: Portable pulse oximeter using a single AAA alkaline cell to power LED drivers and analog signal chain. IC Role / Device Role / Timing Role: Primary DC-DC converter generating clean 2.7V supply for photodiode TIA and ADC reference, rejecting battery voltage droop during LED pulses. Use Value: ±1% output accuracy maintains consistent LED current and ADC gain; EMI suppression prevents noise coupling into weak analog signals. |
| Low-Power Hand-Held Instruments | Digital Still Cameras (Compact) |
Use Scenario: Pocket-sized multimeter with LCD backlight and Bluetooth LE connectivity, operating from one AA cell. IC Role / Device Role / Timing Role: Supplies regulated 2.7V to display driver IC and BLE SoC during active measurement and wireless upload. Use Value: Fixed 2.7V output matches common LCD bias requirements; 150mA capability supports simultaneous display + radio operation without brownout. | Use Scenario: Entry-level digital camera using single-cell Li+ battery to power image sensor, flash LED, and SD card interface. IC Role / Device Role / Timing Role: Provides 2.7V rail to CMOS image sensor analog core and flash LED driver during capture sequence. Use Value: Internal damping switch prevents EMI-induced pixel noise during flash charging; TSOT package enables placement near sensor module for low-noise power delivery. |
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 |
|---|---|---|---|
| MAX1724EZK27+T | Same family, identical 2.7V fixed output and TSOT package, but includes active-low SHDN pin (MAX1722EZK-T has no shutdown control) | Required when system-level power sequencing or deep-sleep mode mandates controlled enable/disable | Select MAX1724EZK27+T if firmware-controlled shutdown is needed; otherwise MAX1722EZK-T saves GPIO and simplifies design |
| Texas Instruments TPS61200DRCT | 1.2µA IQ, 2.5V fixed output, 5-pin SON package; lacks integrated EMI damping and 0.91V startup guarantee | Suitable for cost-sensitive consumer devices where EMI compliance is less stringent and battery cutoff is >1.0V | Choose TPS61200DRCT only if 0.2µA lower IQ justifies trade-offs in startup margin and EMI mitigation effort |
Compared with MAX1724EZK27+T, MAX1722EZK-T offers simpler enable logic but no shutdown control; versus TPS61200DRCT, it provides superior low-voltage startup and built-in EMI reduction at the cost of slightly higher IQ - making it optimal for ultra-long-life, EMI-critical medical and industrial sensors.
Availability
MAX1722EZK-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 extended production lifecycles.
Supply support for MAX1722EZK-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, space-constrained battery-operated systems where startup voltage, quiescent current, and EMI performance define system viability.
FAQ
What is the guaranteed minimum startup voltage for MAX1722EZK-T?
The MAX1722EZK-T guarantees startup at 0.91V input voltage under all conditions across -40°C to +85°C. This specification is validated per the datasheet's Typical Operating Characteristics (Figure toc05) and Electrical Characteristics table, enabling reliable operation from nearly-dead single-cell alkaline batteries. The MAX1722EZK-T achieves this via a dedicated BATT-powered startup circuit distinct from the MAX1723 variant.
Does MAX1722EZK-T require external feedback resistors to set its output voltage?
No, MAX1722EZK-T does not require external feedback resistors. It is a fixed-output variant delivering 2.7V ±1%, with output voltage trimmed at wafer test. Pin 3 (FB) is internally connected and must remain unconnected in the application circuit - unlike the adjustable MAX1722/MAX1723 versions which require R1/R2 dividers.
Can MAX1722EZK-T be used with a single Li+ cell?
Yes, MAX1722EZK-T supports input voltages from 0.8V to 5.5V, fully covering the Li+ cell range (2.7V–4.2V). Its 2.7V fixed output is particularly well-matched to Li+ applications where the output must remain stable across the full discharge curve without overvoltage risk to downstream 2.7V-tolerant ICs.
What is the function of the BATT pin on MAX1722EZK-T beyond input supply?
On MAX1722EZK-T, the BATT pin serves dual functions: (1) primary input supply connection for the power stage, and (2) connection point for the internal damping switch that suppresses inductor ringing and reduces EMI. This integrated damping - absent in MAX1723 - eliminates need for external RC snubbers in most Class B EMI-compliant designs.
Is MAX1722EZK-T RoHS-compliant and lead(Pb)-free?
Yes, MAX1722EZK-T is RoHS-compliant and lead(Pb)-free, indicated by the "+" suffix in its full orderable part number (MAX1722EZK+T+). Per Maxim's Package Information, the TSOT package meets JEDEC J-STD-020 moisture sensitivity level 1 and supports reflow soldering at +260°C peak temperature.
MAX1722EZK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- 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:
- 150mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MAX1722EZK-T FAQ
1.How can I place an order for MAX1722EZK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1722EZK-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 MAX1722EZK-T reliable?
The price and inventory of MAX1722EZK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1722EZK-T is usually 5 days.
3.What payment methods are accepted for MAX1722EZK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1722EZK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1722EZK-T?
MAX1722EZK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1722EZK-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 MAX1722EZK-T?
For technical support, including MAX1722EZK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1722EZK-T requirements.
6.How does Aetrix verify that MAX1722EZK-T is sourced from the original manufacturer or authorized distributors?
All MAX1722EZK-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 MAX1722EZK-T meets industry standards.
7.What is the process for return or replacement of MAX1722EZK-T?
All MAX1722EZK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1722EZK-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 MAX1722EZK-T part is unused and in its original packaging.
Return procedure for MAX1722EZK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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