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Analog Devices Inc./Maxim Integrated MAX1572ETC075
- Part No.:
- MAX1572ETC075
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WQFN Exposed Pad
- Datasheet:
-
MAX1572ETC075.pdf
- Description:
- IC REG BUCK 0.75V 800MA 12TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,163
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Product details
Overview
MAX1572ETC075 from Maxim Integrated is a fixed-frequency, synchronous step-down DC-DC converter designed to power low-voltage microprocessor/DSP cores in portable electronics. It delivers a factory-trimmed 0.75V output at up to 800mA, operates from 2.6V–5.5V input, and uses 2MHz PWM switching with integrated P- and N-channel MOSFETs - enabling compact designs for space-constrained battery-powered systems like smartphones and digital cameras.
For engineers reviewing the MAX1572ETC075 datasheet, MAX1572ETC075 pinout, MAX1572ETC075 application, or MAX1572ETC075 equivalent, key selection criteria include its 0.75V fixed output, 48µA quiescent current in pulse-group mode, 170ms RESET timeout, voltage-positioning load transient response, and compatibility with tiny 2.2µH inductors and 10µF ceramic capacitors.
Technical Context
The MAX1572ETC075 implements a current-mode PWM control architecture with internal slope compensation, enabling stable regulation across wide load ranges and fast transient response. Its dual-MOSFET synchronous rectification eliminates external diode requirements and supports 100% duty-cycle operation near dropout.
Three selectable operating modes - pulse-group (48µA IQ), pulse-skip, and forced-PWM - are controlled via EN1/EN2 logic inputs, allowing dynamic trade-offs between efficiency, ripple, and noise. The device integrates a soft-start circuit (SS pin), open-drain RESET output referenced to OUT, and ABATT analog supply filtering for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.75V ±2% (voltage-positioned for optimized load transients) |
| Max Output Current | 800mA guaranteed continuous output into regulated load |
| Input Voltage Range | 2.6V to 5.5V - compatible with single-cell Li-ion and multi-cell alkaline supplies |
| Switching Frequency | 2MHz ±10% - enables use of miniature 2.2µH inductors and low-ESR ceramic caps |
| Quiescent Current | 48µA typical in pulse-group mode - extends battery life in standby |
| RESET Delay | 170ms minimum after VOUT reaches 90% - ensures reliable power-on reset sequencing |
| Shutdown Current | 0.1µA maximum - minimizes leakage during system sleep |
| Output Ripple | 5mVP-P typical - meets tight noise budgets for sensitive analog/digital cores |
Pinout & Package
MAX1572ETC075 is housed in a 12-pin, 4mm × 4mm thin QFN package with exposed thermal paddle (EP), optimized for high-power-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Open-drain reset output | Pulled low until VOUT stabilizes ≥90% of 0.75V; internal 14kΩ pullup to OUT |
| 2 SS | Soft-start timing control | Capacitor-to-GND sets startup ramp; discharges internally at shutdown (100Ω) |
| 3,5,11 GND | Digital ground reference | Must connect all three pins and exposed paddle to common low-impedance ground plane |
| 4 OUT | Output voltage sense input | Direct connection to regulator output; internal 14kΩ discharge path to GND in shutdown |
| 6 EN2 | Enable/Mode control input | Logic input defining operating mode per truth table (e.g., EN1=0, EN2=1 → pulse-group) |
| 7 PGND | Power ground return | Low-inductance path for LX switching current; connects directly to exposed paddle |
| 8 LX | Switch node | Connects to inductor; high-impedance in shutdown; contains internal clamp diodes to PGND/BATT |
| 9 BATT | Main power input | 2.6V–5.5V supply; requires local 10µF ceramic bypass to GND |
| 10 EN1 | Enable/Mode control input | Paired with EN2 to select shutdown, pulse-group, pulse-skip, or forced-PWM mode |
| 12 ABATT | Analog supply filter input | Filtered version of BATT via 10Ω + 0.1µF RC network - improves PSRR and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Voltage positioning | Matches output droop to load transients - halves total output variation vs. conventional regulators |
| Synchronous rectification | Integrated P- and N-channel MOSFETs eliminate external Schottky diode and reduce conduction losses |
| Triple-mode operation | Selectable pulse-group (ultra-low IQ), pulse-skip (fast transient), or forced-PWM (low-noise spectrum) via EN1/EN2 |
| 170ms RESET timer | Guaranteed minimum delay ensures robust power-on reset for DSP/microprocessor core sequencing |
| 2MHz fixed-frequency PWM | Enables <2.5mm² total passive area (2.2µH + 10µF) - critical for ultra-thin mobile PCBs |
| Zero-inrush soft-start | SS pin controls monotonic VOUT ramp - prevents input current spikes during cold start |
Applications
| Smartphone Core Power | Digital Camera Baseband IC |
|---|---|
Use Scenario: Powers ARM-based application processor core (e.g., Cortex-A series) in battery-operated smartphones requiring sub-1V supply with rapid load transitions. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 0.75V at up to 800mA with voltage positioning to suppress overshoot during CPU burst activity. Use Value: Enables >95% peak efficiency at 300–600mA loads and maintains <10mV output deviation during 20mA→550mA transients in forced-PWM mode. |
Use Scenario: Supplies baseband processor in compact digital cameras where board area and thermal dissipation are tightly constrained. IC Role / Device Role / Timing Role: High-frequency (2MHz) step-down converter providing stable 0.75V rail with integrated RESET for safe boot initialization. Use Value: Reduces external component count by eliminating Schottky diode and allows use of 2.2µH/10µF footprint - saving >3mm² PCB area vs. 500kHz alternatives. |
| Portable Medical Sensor Hub | Wearable Fitness SoC |
Use Scenario: Powers low-power sensor fusion MCU in FDA-cleared handheld diagnostic devices requiring long battery life and EMI-controlled operation. IC Role / Device Role / Timing Role: Efficiency-optimized DC-DC converter operating in pulse-group mode (48µA IQ) during sensor idle periods, with forced-PWM for active measurement windows. Use Value: Extends runtime by >30% over comparable 500kHz converters while meeting CISPR-22 Class B conducted emissions limits via predictable 2MHz switching spectrum. |
Use Scenario: Delivers regulated 0.75V supply to ultra-low-power wearable SoC (e.g., Nordic nRF5340) in wrist-worn fitness trackers with strict thickness limits. IC Role / Device Role / Timing Role: Compact-area buck regulator with integrated soft-start and RESET, supporting seamless wake-from-sleep transitions. Use Value: Achieves <0.5mm profile with 4mm×4mm QFN and enables zero-inrush startup - preventing brownout during BLE radio wake events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | 0.75V fixed output, 800mA, 3MHz switching, but lacks integrated RESET and voltage positioning | Requires external reset IC and compensation tuning for load transients | Preferred when higher switching frequency justifies added design complexity and external components |
| RT8059GJ6 | 0.75V fixed output, 800mA, 2MHz, includes RESET but no voltage positioning or pulse-group mode | Higher 100µA quiescent current limits battery life in always-on sensor nodes | Selected when RESET functionality is required but ultra-low IQ is not critical |
Compared with TPS62231DRYT and RT8059GJ6, the MAX1572ETC075 uniquely combines 0.75V fixed output, integrated 170ms RESET, voltage positioning, and 48µA pulse-group IQ - making it optimal for space- and battery-limited portable systems demanding both precision regulation and minimal BOM count.
Availability
MAX1572ETC075 is available at Aetrix Electronics and suitable for smartphone core power, digital camera baseband ICs, portable medical sensor hubs, wearable fitness SoCs, and handheld instrumentation requiring stable component supply with full traceability and lifecycle support.
Supply support for MAX1572ETC075 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX1572ETC075 belongs to Maxim's high-efficiency portable power management product line, engineered specifically for low-voltage, high-current core supplies in battery-powered devices where size, efficiency, and transient performance are critical.
FAQ
What output voltage does the MAX1572ETC075 provide?
The MAX1572ETC075 provides a factory-trimmed fixed output voltage of 0.75V with ±2% accuracy over temperature and load. This value is laser-trimmed during production and cannot be adjusted externally - ensuring consistent core supply voltage for low-power microprocessors and DSPs without requiring feedback resistor networks.
How does the MAX1572ETC075 achieve ultra-low quiescent current?
The MAX1572ETC075 achieves 48µA typical quiescent current in pulse-group mode by dynamically powering down nonessential internal circuitry when the output voltage rises 0.8% above nominal regulation. During light-load conditions, this mode cycles the controller on/off to minimize average supply current while maintaining regulation - a key advantage for battery longevity in portable systems using MAX1572ETC075.
Does the MAX1572ETC075 require an external Schottky diode?
No, the MAX1572ETC075 does not require an external Schottky diode. It integrates both a high-side P-channel and low-side N-channel MOSFET for synchronous rectification, eliminating conduction losses and thermal overhead associated with discrete diodes - reducing component count and improving efficiency across the full 0–800mA load range of MAX1572ETC075.
What is the purpose of the ABATT pin on the MAX1572ETC075?
The ABATT pin on the MAX1572ETC075 provides a filtered analog supply path derived from BATT through an integrated 10Ω resistor and external 0.1µF capacitor to GND. This dedicated low-noise rail powers sensitive analog blocks (error amplifier, reference, PWM comparator), improving PSRR and reducing switching noise coupling into the feedback loop - directly enhancing regulation accuracy and stability of MAX1572ETC075.
Can the MAX1572ETC075 operate with 100% duty cycle?
Yes, the MAX1572ETC075 supports 100% duty-cycle operation when the input voltage approaches the 0.75V output, enabling minimal dropout performance. In this mode, the high-side P-channel MOSFET remains fully enhanced (non-switching), and regulation relies solely on its RDS(ON)P - resulting in VDROPOUT = IOUT × (RDS(ON)P + inductor DCR), as specified in the MAX1572ETC075 electrical characteristics table.
MAX1572ETC075 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.6V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.75V
- Voltage - Output (Max):
- -
- Current - Output:
- 800mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TQFN (4x4)
MAX1572ETC075 FAQ
1.How can I place an order for MAX1572ETC075 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1572ETC075 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 MAX1572ETC075 reliable?
The price and inventory of MAX1572ETC075 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1572ETC075 is usually 5 days.
3.What payment methods are accepted for MAX1572ETC075?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1572ETC075 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1572ETC075?
MAX1572ETC075 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1572ETC075 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 MAX1572ETC075?
For technical support, including MAX1572ETC075 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1572ETC075 requirements.
6.How does Aetrix verify that MAX1572ETC075 is sourced from the original manufacturer or authorized distributors?
All MAX1572ETC075 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 MAX1572ETC075 meets industry standards.
7.What is the process for return or replacement of MAX1572ETC075?
All MAX1572ETC075 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1572ETC075, 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 MAX1572ETC075 part is unused and in its original packaging.
Return procedure for MAX1572ETC075:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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