My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8640YEXT16+T
- Part No.:
- MAX8640YEXT16+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MAX8640YEXT16+T.pdf
- Description:
- IC REG BUCK 1.6V 500MA SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,532
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8640YEXT16+T from Maxim Integrated is a synchronous step-down DC-DC converter optimized for space-constrained portable applications. It delivers up to 500mA at a factory-preset 1.6V output, operates with a 2MHz switching frequency, uses only a 2.2µH inductor and 4.7µF output capacitor, and achieves 28µA quiescent current - enabling long battery life in handheld devices.
For engineers reviewing the MAX8640YEXT16+T datasheet, MAX8640YEXT16+T pinout, MAX8640YEXT16+T application, or MAX8640YEXT16+T equivalent, key selection criteria include guaranteed 500mA output at 1.6V, ultrasonic pulse-skipping mode down to 1mA loads, ±1% initial output accuracy, voltage-positioning load regulation, and SC70 package compatibility with high-density PCB layouts.
Technical Context
The MAX8640YEXT16+T implements a proprietary hysteretic PWM control scheme that enables fast line/load transient response and stable operation with minimal external components. Its voltage-positioning feedback architecture samples the LX node directly, eliminating phase lag from the output capacitor and yielding load regulation equal to the inductor's DC resistance multiplied by load current.
This architecture supports ultrasonic skip-mode operation below 100mA, maintaining switching frequencies above 20kHz even at 1mA load, while internal synchronous rectification replaces the external Schottky diode and reduces conduction losses. The device integrates fast soft-start to suppress inrush current and features thermal shutdown with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-preset 1.6V (±1% initial accuracy) - eliminates external resistor divider and simplifies BOM. |
| Switching Frequency | Up to 2MHz - enables use of compact 2.2µH inductors and reduces EMI filtering requirements. |
| Max Output Current | 500mA guaranteed - sufficient for microprocessor I/O rails or DSP core supplies in portable systems. |
| Quiescent Current | 28µA typical - extends battery runtime in always-on or low-duty-cycle applications. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li+ (3.0–4.2V), alkaline (3.0–4.5V), and USB-powered systems. |
| Shutdown Current | 0.01µA typical - ensures near-zero power drain when disabled, critical for standby modes. |
| Load Regulation | Voltage-positioning type: ΔVOUT = IL × RDCR(L) - minimizes overshoot during load transients without requiring large output capacitance. |
Pinout & Package
MAX8640YEXT16+T is housed in a lead-free, RoHS-compliant 6-pin SC70 package (2.0mm × 2.1mm), suitable for high-density portable PCBs. 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 | High-impedance during shutdown; connects internally to drains of p-channel and n-channel MOSFETs - requires short, low-inductance trace to inductor. |
| 2, 5 - GND | Power ground | Two dedicated ground pins must be connected together directly under the IC and tied to input/output capacitor grounds - critical for noise immunity and thermal performance. |
| 3 - OUT | Output sense/feedback | Internally connected to precision voltage reference and regulation network; bypass with ceramic capacitor placed adjacent to pin 3 and pin 2 - defines output voltage setpoint. |
| 4 - SHDN | Active-low enable | Logic input requiring ≥10µs low pulse after VIN exceeds UVLO (2.6V typ) to reset internal logic; pulls to GND for shutdown (0.01µA ICC). |
| 6 - IN | Input supply | Accepts 2.7V–5.5V; bypass with ceramic capacitor placed adjacent to pin 6 and pin 5 - filters high-frequency switching noise and supports soft-start. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasonic skip mode | Maintains >20kHz switching frequency down to 1mA load - avoids audible noise in audio-sensitive portable devices. |
| Internal synchronous rectification | Replaces external Schottky diode; reduces conduction loss and improves efficiency across full load range. |
| Voltage-positioning load regulation | Delivers predictable ΔVOUT = IL × RDCR(L), halving peak-to-peak output excursions during load transients vs. conventional buck regulators. |
| Fast soft-start | Eliminates inrush current at startup - reduces stress on input source (e.g., Li+ cells) and input capacitor sizing requirements. |
| Small external component count | Requires only one inductor (2.2µH), one input cap (2.2µF), and one output cap (4.7µF) - lowers BOM cost and board area. |
Applications
| Microprocessor I/O Power | Cell Phone Baseband Core |
|---|---|
|
Use Scenario: Supplying 1.6V I/O rails for ARM-based microcontrollers in wearables and IoT edge nodes. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 1.6V at up to 500mA with fast transient response to handle burst-mode communication loads. Use Value: Factory-preset 1.6V eliminates feedback resistors; 2MHz switching allows ultra-compact 2.2µH inductor placement near processor package. |
Use Scenario: Powering baseband processor cores in dual-SIM smartphones operating from single-cell Li+ batteries. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting dynamic voltage scaling (DVS) during varying processing loads. Use Value: 28µA quiescent current extends standby time; voltage-positioning regulation minimizes VDD droop during RF transmit bursts. |
| Digital Still Camera Sensor Bias | Portable Medical Monitor Display |
|
Use Scenario: Generating clean 1.6V bias for CMOS image sensor analog front-end in compact DSCs. IC Role / Device Role / Timing Role: Low-noise, low-ripple power source with ultrasonic skip mode to prevent interference with image capture timing. Use Value: <10mVpp output ripple at all loads ensures minimal sensor readout noise; SC70 footprint fits tight camera module layouts. |
Use Scenario: Powering OLED display drivers in handheld patient monitors where battery life and EMI compliance are critical. IC Role / Device Role / Timing Role: Compact, efficient DC-DC stage converting 3.7V battery to regulated 1.6V display logic supply. Use Value: Fast line-transient response (<10µs recovery) maintains display stability during battery voltage sag; RoHS-compliant SC70 meets medical regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS622313DRYT | 1.6V fixed output, 3MHz switching, 350mA max, 29µA IQ, 6-pin WSON (2.0 × 2.0mm) | Lower output current rating; slightly larger package footprint; no voltage-positioning architecture | Select when higher switching frequency is prioritized over load-transient performance and 500mA headroom. |
| Analog Devices ADP2119ACPZ-R7 | 1.6V fixed output, 1.2MHz switching, 600mA max, 30µA IQ, 6-pin LFCSP (2.0 × 2.0mm) | Lower switching frequency increases inductor size; lacks ultrasonic skip mode; different soft-start behavior | Select when higher output current margin is required and board space permits larger 4.7µH inductor. |
Compared with TPS622313DRYT and ADP2119ACPZ-R7, the MAX8640YEXT16+T uniquely combines 500mA capability, 2MHz operation, voltage-positioning regulation, and ultrasonic skip mode in a 2.0mm × 2.1mm SC70 package - offering superior transient response and layout efficiency for space-constrained 1.6V rail generation.
Availability
MAX8640YEXT16+T is available at Aetrix Electronics and suitable for microprocessor I/O power, cell phone baseband core supplies, and digital still camera sensor bias applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MAX8640YEXT16+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 high-performance analog, mixed-signal, and power-management ICs for demanding applications in industrial, automotive, communications, and consumer markets.
The MAX8640Y series targets ultra-compact, high-efficiency DC-DC conversion in battery-powered portable electronics - emphasizing minimal external components, low quiescent current, and robust transient performance in sub-3mm² footprints.
FAQ
What is the factory-preset output voltage of the MAX8640YEXT16+T?
The MAX8640YEXT16+T has a factory-preset output voltage of 1.6V 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 and simplifies design for applications requiring a stable 1.6V rail.
Does the MAX8640YEXT16+T support ultrasonic operation at light loads?
Yes, the MAX8640YEXT16+T automatically enters ultrasonic pulse-skipping mode below 100mA load, maintaining switching frequencies above 20kHz even at 1mA load. This prevents audible noise in sensitive audio or imaging applications - a key advantage over conventional buck converters that drop into sub-20kHz skip mode.
What package type and dimensions does the MAX8640YEXT16+T use?
The MAX8640YEXT16+T uses a lead-free, RoHS-compliant 6-pin SC70 package measuring 2.0mm × 2.1mm. Its small footprint and thermal characteristics (245mW at +70°C, derating 3.1mW/°C) make it ideal for high-density portable PCBs where space and thermal management are constrained.
How does the voltage-positioning load regulation of the MAX8640YEXT16+T improve transient response?
The MAX8640YEXT16+T implements voltage-positioning regulation by sampling the LX node directly, resulting in load regulation ΔVOUT = IL × RDCR(L). This architecture removes phase lag from the output capacitor, cuts peak-to-peak output-voltage excursions in half during load transients, and enables stable operation with very small ceramic output capacitors.
What are the recommended external components for the MAX8640YEXT16+T?
The MAX8640YEXT16+T is optimized for a 2.2µH inductor and 4.7µF output capacitor (C2), with a 2.2µF input capacitor (C1) placed close to the IN and GND pins. Inductor DC resistance should be 75–150mΩ for optimal voltage positioning; X5R/X7R ceramic capacitors are recommended for stable capacitance across temperature and bias.
MAX8640YEXT16+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.6V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
MAX8640YEXT16+T FAQ
1.How can I place an order for MAX8640YEXT16+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8640YEXT16+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 MAX8640YEXT16+T reliable?
The price and inventory of MAX8640YEXT16+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8640YEXT16+T is usually 5 days.
3.What payment methods are accepted for MAX8640YEXT16+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8640YEXT16+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8640YEXT16+T?
MAX8640YEXT16+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8640YEXT16+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 MAX8640YEXT16+T?
For technical support, including MAX8640YEXT16+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8640YEXT16+T requirements.
6.How does Aetrix verify that MAX8640YEXT16+T is sourced from the original manufacturer or authorized distributors?
All MAX8640YEXT16+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 MAX8640YEXT16+T meets industry standards.
7.What is the process for return or replacement of MAX8640YEXT16+T?
All MAX8640YEXT16+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8640YEXT16+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 MAX8640YEXT16+T part is unused and in its original packaging.
Return procedure for MAX8640YEXT16+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8640YEXT16+T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
