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Analog Devices Inc./Maxim Integrated MAX8640YEXT13+
- Part No.:
- MAX8640YEXT13+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX8640YEXT13+.pdf
- Description:
- IC REG BUCK 1.3V 500MA SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,894
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Product details
Overview
MAX8640YEXT13+ from Maxim Integrated is a synchronous step-down DC-DC converter optimized for space-constrained portable applications. It delivers up to 500mA output current at a factory-preset 1.3V, operates with a 2MHz switching frequency, uses only a 2.2µH inductor and 4.7µF output capacitor, and features 28µA quiescent current - enabling long battery life in handheld devices.
For engineers reviewing the MAX8640YEXT13+ datasheet, MAX8640YEXT13+ pinout, MAX8640YEXT13+ application, or MAX8640YEXT13+ equivalent, key selection criteria include guaranteed 500mA load capability, ±1% output voltage accuracy at 1.3V, ultrasonic pulse-skipping mode down to 1mA, fast transient response, and SC70 package compatibility with tight PCB layout constraints.
Technical Context
The MAX8640YEXT13+ employs a proprietary hysteretic PWM control scheme that enables stable regulation without external compensation while maintaining low output ripple across all loads. Its voltage-positioning feedback architecture samples the LX node directly, eliminating phase lag from the output capacitor and yielding load regulation proportional to inductor DCR (e.g., ~100mΩ × ILOAD).
It integrates complementary p-channel and n-channel MOSFETs with on-resistances of 0.6Ω (pFET) and 0.35Ω (nFET), supports shutdown with 0.01µA typical ICC, and includes internal soft-start to suppress inrush current - critical for Li+-cell and alkaline-powered systems where input source impedance is high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory preset 1.3V (±1% initial accuracy); eliminates external resistor divider and saves board area. |
| Switching Frequency | Up to 2MHz; enables use of small 2.2µH inductors and reduces EMI above audible range. |
| Max Output Current | 500mA guaranteed; sufficient for microprocessor I/O rails or DSP core supplies in portable gear. |
| Quiescent Current | 28µA typical at no load; extends battery runtime in standby and light-load modes. |
| Input Voltage Range | 2.7V to 5.5V; compatible with single-cell Li+, 3.3V logic rails, and dual-cell alkaline inputs. |
| Shutdown Current | 0.01µA typical; allows deep power-down in always-on subsystems without leakage penalty. |
| Load Transient Response | Overshoot < ±30mV for 5mA ↔ 250mA steps; enabled by voltage-positioning feedback and fast loop dynamics. |
Pinout & Package
MAX8640YEXT13+ is housed in a lead-free, RoHS-compliant 6-pin SC70 package (2.0mm × 2.1mm), suitable for high-density portable PCB layouts. Thermal performance is rated at 245mW continuous power dissipation at +70°C (derating 3.1mW/°C above).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LX) | Inductor switch node | Connects to internal pFET drain and nFET source; carries high di/dt switching current; requires short, low-inductance trace routing. |
| 2,5 (GND) | Power ground | Dual GND pins must be connected together directly under IC and tied to input/output capacitor grounds to minimize ground bounce. |
| 3 (OUT) | Output voltage sense | Internally connects to feedback network; bypass with ceramic capacitor close to pin 3 and pin 2 for stability and noise immunity. |
| 4 (SHDN) | Active-low enable | Logic-low ≥10µs after VIN exceeds UVLO (2.6V) resets internal logic; drives 0.01µA shutdown current when asserted. |
| 6 (IN) | Input supply | Accepts 2.7V–5.5V; bypass with ceramic capacitor near pin 6 and pin 5 to suppress switching noise and reduce input ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-positioning load regulation | Output droop equals inductor DCR × load current (e.g., 100mΩ × 500mA = 50mV), minimizing transient overshoot by ~50% vs conventional buck converters. |
| Ultrasonic pulse-skipping mode | Operates >20kHz down to 1mA load, eliminating audible noise while maintaining 28µA quiescent current and low output ripple. |
| Internal synchronous rectification | Replaces external Schottky diode; achieves >90% efficiency at 200mA with 2.2µH/4.7µF components and eliminates diode forward drop loss. |
| Fast soft-start | Prevents inrush current into output capacitor; reduces required input capacitance and avoids brownout on weak sources like coin cells. |
| Small external component count | Only two passive components needed: 2.2µH inductor and 4.7µF ceramic output capacitor - no feedback resistors or compensation network. |
Applications
| Microprocessor I/O Power | Cell Phone Baseband Core |
|---|---|
|
Use Scenario: Supplying 1.3V I/O rail for ARM-based microcontrollers in wearables and IoT edge nodes. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 500mA with fast load-transient response to handle bursty peripheral activity. Use Value: Voltage-positioning feedback ensures < ±30mV output deviation during 5mA ↔ 250mA transients, preventing I/O timing violations. |
Use Scenario: Powering baseband processor cores in slim smartphones where board area is constrained. IC Role / Device Role / Timing Role: Compact, high-efficiency DC-DC converter replacing larger discrete solutions in RF module power domains. Use Value: 2MHz operation enables 2.2µH inductor and 4.7µF capacitor - reducing total solution footprint by >40% vs 500kHz alternatives. |
| Digital Still Camera (DSC) Sensor Bias | MP3 Player Audio Codec Supply |
|
Use Scenario: Providing clean, low-noise 1.3V bias to CMOS image sensor analog front-end circuits. IC Role / Device Role / Timing Role: Low-ripple, low-quiescent-current regulator supporting always-on imaging functions with minimal thermal impact. Use Value: 28µA quiescent current and ultrasonic skip mode extend standby time; output ripple < 10mVPP prevents sensor pattern noise. |
Use Scenario: Supplying 1.3V to stereo audio codecs in portable music players powered by single Li+ cells. IC Role / Device Role / Timing Role: Efficient, compact voltage regulator interfacing directly with battery input (2.7V–4.2V) and codec load. Use Value: 2.7V–5.5V input range accommodates full Li+ discharge curve; fast line-transient response (< 20µs settling) prevents audio pop/click. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | Fixed 1.3V output, 3MHz switching, 400mA max, 17µA IQ, 2.05V–6.5V input | Lower max current and higher minimum input voltage limit; less suitable for sub-2.7V alkaline operation | Preferred where higher switching frequency and lower IQ are prioritized over 500mA headroom |
| RT8059ZSP | Adjustable output (0.6V–5.5V), 2MHz, 600mA, 30µA IQ, 2.5V–5.5V input, requires external feedback resistors | Requires external resistors and compensation; lacks factory-preset simplicity and voltage-positioning benefit | Chosen when programmable output or tighter input voltage tolerance (2.5V min) is required |
Compared with TPS62231DRYT and RT8059ZSP, the MAX8640YEXT13+ uniquely combines factory-set 1.3V, 500mA capability, voltage-positioning load regulation, and 2.7V minimum input - making it optimal for space- and battery-life-critical 1.3V I/O rails where design simplicity and transient robustness are essential.
Availability
MAX8640YEXT13+ is available at Aetrix Electronics and suitable for microprocessor I/O power, cell phone baseband core supplies, and digital still camera sensor bias requiring stable component supply, consistent RoHS compliance, and long-term production availability.
Supply support for MAX8640YEXT13+ 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, automotive, and portable applications.
The MAX8640Y series targets ultra-compact, high-efficiency DC-DC conversion in battery-powered handhelds - emphasizing minimal external components, low quiescent current, and robust transient performance without compensation networks.
FAQ
What is the factory-preset output voltage of the MAX8640YEXT13+?
The MAX8640YEXT13+ has a factory-preset output voltage of 1.3V with ±1% initial accuracy at +25°C and ±2% over the full -40°C to +85°C operating temperature range. This fixed output eliminates the need for external feedback resistors, reducing component count and PCB area. The 1.3V setting is confirmed in the Selector Guide table and Pin Description section of the official datasheet.
Does the MAX8640YEXT13+ require external compensation components?
No, the MAX8640YEXT13+ does not require external compensation components. Its proprietary hysteretic PWM control scheme and voltage-positioning feedback architecture - which senses the LX node directly - provide inherent loop stability with only a 2.2µH inductor and 4.7µF ceramic output capacitor. This simplifies design and improves reliability compared to traditional voltage-mode buck regulators.
What package type and dimensions does the MAX8640YEXT13+ use?
The MAX8640YEXT13+ uses a lead-free, RoHS-compliant 6-pin SC70 package measuring 2.0mm × 2.1mm. This ultra-small outline is documented in the Package Information section (Document No. X6S-1) and Pin Configurations diagram. The dual GND pins (pins 2 and 5) must be connected directly under the IC to ensure proper thermal and electrical performance.
How does the MAX8640YEXT13+ achieve low quiescent current in light-load conditions?
The MAX8640YEXT13+ achieves 28µA typical quiescent current by automatically entering ultrasonic pulse-skipping mode below ~100mA load. In this mode, switching frequency drops while remaining above 20kHz to avoid audible noise, and internal circuitry minimizes bias currents. Shutdown mode further reduces current to 0.01µA when SHDN is pulled low.
Can the MAX8640YEXT13+ operate from a single alkaline cell?
Yes, the MAX8640YEXT13+ can operate from a single alkaline cell. Its 2.7V to 5.5V input range covers the full discharge curve of a fresh alkaline cell (~1.5V × 2 = 3.0V open-circuit, dropping to ~2.7V under load). The 2.6V UVLO threshold ensures reliable startup and operation even as the cell voltage declines, making it suitable for remote controls, sensors, and other primary-battery-powered devices.
MAX8640YEXT13+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX8640YEXT13+ FAQ
1.How can I place an order for MAX8640YEXT13+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8640YEXT13+ 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 MAX8640YEXT13+ reliable?
The price and inventory of MAX8640YEXT13+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8640YEXT13+ is usually 5 days.
3.What payment methods are accepted for MAX8640YEXT13+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8640YEXT13+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8640YEXT13+?
MAX8640YEXT13+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8640YEXT13+ 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 MAX8640YEXT13+?
For technical support, including MAX8640YEXT13+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8640YEXT13+ requirements.
6.How does Aetrix verify that MAX8640YEXT13+ is sourced from the original manufacturer or authorized distributors?
All MAX8640YEXT13+ 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 MAX8640YEXT13+ meets industry standards.
7.What is the process for return or replacement of MAX8640YEXT13+?
All MAX8640YEXT13+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8640YEXT13+, 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 MAX8640YEXT13+ part is unused and in its original packaging.
Return procedure for MAX8640YEXT13+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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