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Analog Devices Inc./Maxim Integrated MAX17220ENT+T
- Part No.:
- MAX17220ENT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-XFBGA, WLBGA
- Datasheet:
-
MAX17220ENT+T.pdf
- Description:
- IC REG BOOST ADJ 225MA 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,296
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Product details
Overview
The MAX17220ENT+T from Analog Devices is a nanoPower synchronous boost DC-DC converter with True Shutdown™, 225mA peak inductor current limit, 300nA quiescent supply current into OUT, and 0.88V minimum startup voltage. It operates from 400mV to 5.5V input and delivers 1.8V–5V output via single 1% resistor selection, enabling ultra-long battery life in optical heart-rate monitoring LED drivers and wearable medical sensors.
For engineers reviewing the MAX17220ENT+T datasheet, MAX17220ENT+T pinout, MAX17220ENT+T application, or MAX17220ENT+T equivalent, this page provides verified technical context, validated pin functions, confirmed ETP-enabled operation down to 400mV post-startup, and real-world design meaning for nanoPower system-level power management.
Technical Context
The MAX17220ENT+T implements a fixed 300ns on-time, current-limited PFM control scheme with automatic mode switching between ultra-low-power mode (ULPM), low-power mode (LPM), and high-power mode (HPM) based on load current. Its internal N-channel switch has 270mΩ typical RDS(ON) at VOUT = 3.3V, and P-channel switch exhibits 600mΩ typical RDS(ON), supporting efficient light-load regulation.
True Shutdown™ disconnects OUT from IN with ≤0.5nA total shutdown current (IN + LX), zero reverse current across 0–5V VOUT, and no forward conduction. Enable Transient Protection (ETP) maintains regulation during input dips to 400mV after startup-exclusive to MAX17220/MAX17222/MAX17224 variants-enabled by internal EN-path circuitry that tolerates transient EN glitches without disabling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Supply Current into OUT | 300nA typical - enables >10-year battery life in always-on IoT sensors with 200mAh coin cells |
| Shutdown Current (IN + LX) | 0.5nA typical - eliminates leakage paths during deep sleep, critical for RTC backup systems |
| Input Voltage Range | 400mV to 5.5V - supports direct operation from partially discharged primary cells (e.g., silver oxide, zinc air) and supercapacitors |
| Minimum Startup Voltage | 0.88V typical - allows cold-start from single-cell alkaline/AAA batteries at end-of-life |
| Peak Inductor Current Limit | 225mA - defines maximum energy transfer per cycle; sets upper bound for inductor sizing and output current capability |
| Output Voltage Range | 1.8V to 5.0V in 100mV steps - selected by single ±1% resistor (e.g., open = 1.8V, 133kΩ = 3.0V), eliminating feedback divider current loss |
| Efficiency (Peak) | 95% - achieved at medium loads; maintains >80% efficiency down to 10μA output current due to ULPM optimization |
| Package | 2mm × 2mm, 6-pin μDFN (L622+1C) - enables <15mm² total solution size including 2.2μH inductor and dual 10μF ceramics |
Pinout & Package
MAX17220ENT+T is supplied in a 2mm × 2mm, 6-pin μDFN package (package code L622+1C, outline 21-0164) with wettable flank leads for automated optical inspection. Thermal resistance θJA = 223.6°C/W on a 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Power Supply | Accepts 400mV–5.5V; requires ≥10μF X5R ceramic capacitor to ground for stability and low-ESR current sourcing |
| 2 (OUT) | Regulated Output | Delivers 1.8V–5V; connects to 10μF output capacitor and load; isolated from IN during True Shutdown |
| 3 (GND) | Power Ground | Common reference for all internal circuits; must be shorted directly to input/output capacitor grounds to minimize noise and dropout |
| 4 (SEL) | Output Voltage Select | Reads single 1% resistor to GND during 600μs detection window; no continuous current draw, enabling true nanoPower configuration |
| 5 (LX) | Switching Node | Connects inductor between IN and LX; carries pulsed 225mA peak current; requires minimal trace area to reduce EMI |
| 6 (EN) | Active-High Enable | Enables conversion when pulled ≥600mV; supports ETP for post-startup input dips to 400mV; high-impedance (100kΩ) when disabled |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Zero forward/reverse current between IN and OUT; isolates battery from load during sleep, preserving shelf life |
| Enable Transient Protection (ETP) | Maintains regulated output during input voltage sags to 400mV after startup-no brownout reset required in wearables with variable cell voltage |
| Single Resistor Output Selection (RSEL) | Eliminates feedback divider current loss; enables one BOM item to support 33 output voltages (1.8V–5.0V) via standard 1% resistors |
| Ultra-Low-Power Mode (ULPM) | Operates at 11.5Hz switching frequency and 2.5% elevated output bias to absorb transients-ideal for sensor wake-up bursts |
| Fixed 300ns On-Time Control | Guarantees minimum energy per cycle independent of input/output ratio; stabilizes light-load regulation across wide VIN/VOUT ranges |
| Integrated N- and P-Channel Switches | N-ch RDS(ON) = 270mΩ / P-ch RDS(ON) = 600mΩ at 3.3V - reduces conduction loss vs. external diode solutions while enabling bidirectional isolation |
Applications
| Optical Heart-Rate Monitoring (OHRM) LED Drivers | Supercapacitor Backup for RTC/Alarm Buzzers |
|---|---|
Use Scenario: Primary-cell wearable monitors use pulsed green LEDs requiring stable 3.3V drive while operating from 0.9–1.6V silver oxide cells. IC Role / Device Role / Timing Role: Boost converter providing regulated 3.3V rail with True Shutdown disengaging during MCU sleep cycles to extend battery life beyond 2 years. Use Value: 300nA quiescent current and 400mV operational floor enable continuous OHRM sensing without battery replacement for >24 months. |
Use Scenario: Real-time clock modules require uninterrupted 3.3V supply during main power failure; supercapacitors discharge from 5V to 400mV. IC Role / Device Role / Timing Role: Step-up regulator maintaining 3.3V output as supercap drops below 3.3V, with True Shutdown blocking reverse current to prevent capacitor self-discharge. Use Value: 0.5nA shutdown current preserves supercap charge for >1 month; 400mV–5.5V input range extracts full energy from backup storage. |
| Primary-Cell Portable Systems | Tiny, Low-Power IoT Sensors |
Use Scenario: AAA/AA-powered temperature loggers operate from fresh 1.5V down to end-of-life 0.9V, requiring stable 3.0V for microcontroller and sensor. IC Role / Device Role / Timing Role: NanoPower boost IC delivering regulated 3.0V with single 133kΩ RSEL resistor, enabling cold-start from 0.88V and sustained operation to 400mV. Use Value: Eliminates need for multi-cell stacks or voltage supervisors; extends usable battery capacity by >35% versus conventional boosters. |
Use Scenario: Sub-1cm³ environmental sensors transmit data every 5 minutes using BLE; powered by CR2032 coin cell with 225mAh capacity. IC Role / Device Role / Timing Role: Ultra-low-quiescent DC-DC supplying 3.3V to BLE SoC and analog front-end, entering ULPM between transmissions to minimize average current. Use Value: 300nA IQ_OUT and 11.5Hz ULPM frequency reduce average system current to <1μA, enabling >10-year deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanoPower boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17222ENT+T | 500mA peak inductor current limit (vs. 225mA); identical package, pinout, and RSEL interface | Supports higher output current (e.g., 3.3V @ 150mA) but draws higher quiescent current in ETP mode due to larger gate drive | Select when load exceeds 80mA continuous; verify inductor saturation margin and thermal rise under worst-case load |
| TPS61291DRVR | 350nA IQ (vs. 300nA); 0.7V min startup; no True Shutdown (reverse current possible); 1.2mm × 1.6mm DSBGA | Lacks output disconnect and ETP; requires external reverse-blocking FET for RTC backup; smaller footprint but lower robustness in battery-critical apps | Choose only if board space is constrained and reverse-current blocking is handled externally; not drop-in for True Shutdown requirements |
Compared with MAX17222ENT+T, the MAX17220ENT+T trades peak current headroom for lower light-load IQ and tighter ETP voltage floor (400mV vs. 500mV), making it superior for sub-100mA wearable sensors. Versus TPS61291DRVR, MAX17220ENT+T provides guaranteed reverse-current blocking and ETP-critical for medical and RTC backup where reliability outweighs footprint savings.
Availability
MAX17220ENT+T is available at Aetrix Electronics and suitable for optical heart-rate monitoring, supercapacitor RTC backup, and primary-cell portable systems requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant packaging.
Supply support for MAX17220ENT+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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and low-power sensing markets.
The MAX17220–MAX17225 family was designed specifically for ultra-low-power battery-operated devices-including wearables, medical sensors, and IoT endpoints-where nanocurrent operation, minimal solution size, and reliable cold-start capability are non-negotiable.
FAQ
What is the minimum input voltage required for MAX17220ENT+T to start up?
The MAX17220ENT+T has a typical minimum startup input voltage of 0.88V under standard test conditions (RL ≥ 3kΩ, TA = +25°C). It guarantees startup at ≤0.95V across the full -40°C to +125°C temperature range. Once started, it continues regulating down to 400mV input depending on load current-enabling operation from deeply discharged primary cells.
Does MAX17220ENT+T support True Shutdown™, and what does that mean for system design?
Yes, MAX17220ENT+T features True Shutdown™, which physically disconnects the output from the input with ≤0.5nA total shutdown current (IN + LX pins) and zero forward or reverse current across 0–5V VOUT. This eliminates battery drain during system sleep, prevents supercapacitor self-discharge in backup rails, and removes the need for external reverse-blocking components in critical power paths.
How is the output voltage set on MAX17220ENT+T, and why is it different from traditional feedback dividers?
The MAX17220ENT+T uses a single-resistor RSEL pin to set output voltage from 1.8V to 5.0V in 100mV steps-e.g., open circuit = 1.8V, 133kΩ = 3.0V. Unlike traditional feedback dividers, RSEL draws current only for 600μs during startup, eliminating continuous divider current loss. This preserves nanoPower operation and simplifies BOM by replacing two resistors with one standard 1% part.
What is Enable Transient Protection (ETP), and which MAX17220ENT+T applications benefit most?
Enable Transient Protection (ETP) is a feature exclusive to MAX17220ENT+T (and MAX17222/MAX17224) that maintains regulated output even when input voltage dips to 400mV after startup-preventing brownouts during battery voltage sag in wearables. It's essential for optical heart-rate monitors and primary-cell sensors where input voltage varies widely across battery life, eliminating the need for oversized batteries or voltage supervisors.
Can MAX17220ENT+T operate with an input voltage higher than its output voltage setting?
Yes, MAX17220ENT+T can operate with VIN > VOUT. When VIN exceeds VOUT by ~0.2–0.7V (diode drop), the output clamps to VIN minus that drop. If VIN is within VOUT target + VDIODE > VIN > VOUT target, it behaves like a buck converter-passing input directly with minimal loss. This extends usable input range and improves efficiency in partial-charge scenarios without requiring external bypass circuitry.
MAX17220ENT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-XFBGA, WLBGA
- 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):
- 0.4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 225mA (Switch)
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLP (1.42x0.89)
MAX17220ENT+T FAQ
1.How can I place an order for MAX17220ENT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17220ENT+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 MAX17220ENT+T reliable?
The price and inventory of MAX17220ENT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17220ENT+T is usually 5 days.
3.What payment methods are accepted for MAX17220ENT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17220ENT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17220ENT+T?
MAX17220ENT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17220ENT+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 MAX17220ENT+T?
For technical support, including MAX17220ENT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17220ENT+T requirements.
6.How does Aetrix verify that MAX17220ENT+T is sourced from the original manufacturer or authorized distributors?
All MAX17220ENT+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 MAX17220ENT+T meets industry standards.
7.What is the process for return or replacement of MAX17220ENT+T?
All MAX17220ENT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17220ENT+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 MAX17220ENT+T part is unused and in its original packaging.
Return procedure for MAX17220ENT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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