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Analog Devices Inc./Maxim Integrated MAX1572ETC150
- Part No.:
- MAX1572ETC150
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WQFN Exposed Pad
- Datasheet:
-
MAX1572ETC150.pdf
- Description:
- IC REG BUCK 0.75V 800MA 12TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,478
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Product details
Overview
MAX1572ETC150 from Maxim Integrated is a fixed-frequency, synchronous step-down DC-DC converter optimized for powering 1.50V microprocessor/DSP cores in portable electronics. It delivers up to 800mA output current with 2MHz PWM switching, 48µA quiescent current in pulse-group mode, and integrated 170ms RESET output - enabling compact, high-efficiency power delivery in space-constrained applications such as smartphones and digital cameras.
For engineers reviewing the MAX1572ETC150 datasheet, MAX1572ETC150 pinout, MAX1572ETC150 application, or MAX1572ETC150 equivalent, key selection criteria include its 1.50V fixed output, 2.6V–5.5V input range, 12-pin thin QFN package, voltage-positioning load transient response, and forced-PWM/low-quiescent modes for noise-sensitive or battery-life-critical designs.
Technical Context
The MAX1572ETC150 employs a 2MHz current-mode PWM control architecture with internal slope compensation to ensure stability 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. Voltage positioning dynamically adjusts output setpoint vs. load current to halve total output voltage variation during transients, while the open-drain RESET output provides 170ms (min) power-on reset timing referenced to OUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.50V ±2% (voltage-positioned for load transient optimization) |
| Input Voltage Range | 2.6V to 5.5V - supports single-cell Li-ion and multi-cell alkaline/battery stacks |
| Max Output Current | 800mA guaranteed - sufficient for low-voltage CPU/DSP core rails |
| Switching Frequency | 2MHz (1.8–2.2MHz) - enables use of 2.2µH inductor and 10µF ceramic capacitors |
| Quiescent Current | 48µA typical in pulse-group mode - extends battery runtime in standby |
| RESET Delay | 170ms minimum - ensures reliable power-on reset for microprocessors |
| Efficiency | Up to 97% at 3.6V input / 1.5V output - minimizes thermal load in sealed enclosures |
Pinout & Package
MAX1572ETC150 is housed in a 12-pin, 4mm × 4mm × 0.8mm thin QFN package with exposed thermal paddle (EP), requiring connection to PGND/GND for optimal thermal performance and EMI control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Open-drain reset output | Pulled low until VOUT reaches 90% of 1.50V and remains stable for ≥170ms; internal 14kΩ pullup to OUT |
| 2 SS | Soft-start control | Capacitor-to-GND sets startup ramp time; discharges internally at 100Ω in shutdown to prevent residual bias |
| 3,5,11 GND | Signal ground | Must be connected to exposed paddle; separates analog/digital return paths from PGND |
| 4 OUT | Output voltage sense | Direct feedback node; internal 14kΩ discharge to GND in shutdown prevents floating regulation |
| 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 | High-current return path for LX switch; must tie directly to exposed paddle for low-impedance thermal path |
| 8 LX | Switch node | Connects to inductor; high-impedance in shutdown; internal clamp diodes to PGND/BATT require layout care |
| 9 BATT | Main supply input | 2.6V–5.5V source; 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 | Filtered via 10Ω resistor + 0.1µF capacitor to GND - isolates sensitive analog circuitry from supply noise |
Key Features
| Feature | Design Value |
|---|---|
| Voltage positioning | Dynamic output setpoint adjustment matches load-line droop, reducing total output variation by 50% during transients |
| Synchronous rectification | Integrated P-channel high-side and N-channel low-side MOSFETs eliminate external Schottky diode and associated losses |
| Triple power-save modes | Pulse-group (48µA IQ), pulse-skip (faster wake-up), and forced-PWM (fixed 2MHz, low-noise spectrum) selectable via EN pins |
| 170ms RESET timer | Monitors regulated 1.50V output and asserts active-low reset only after sustained valid voltage - no external RC timing needed |
| Soft-start with zero inrush | Controlled via external SS capacitor; prevents input current overshoot even with 10µF+ output capacitance |
Applications
| Smartphone Application Processor Core | Digital Camera Image Sensor Bias |
|---|---|
Use Scenario: Powering ARM-based application processors requiring tightly regulated 1.50V core voltage with rapid load transients during burst processing. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 800mA peak current; RESET output sequences SoC boot sequence. Use Value: Voltage positioning reduces output overshoot/undershoot by 50%, eliminating need for oversized output capacitance and saving PCB area. |
Use Scenario: Supplying low-noise 1.50V bias to CMOS image sensors during video capture, where switching noise could induce pattern noise. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter operating in forced-PWM mode to maintain predictable 2MHz ripple spectrum outside sensor bandwidth. Use Value: 2MHz switching allows ceramic capacitors and small inductors while keeping noise energy away from critical analog imaging bands. |
| Portable Medical Diagnostic Handheld | Industrial PDA Real-Time Controller |
Use Scenario: Powering low-power microcontrollers and ADCs in battery-operated diagnostic tools requiring >100-hour standby life. IC Role / Device Role / Timing Role: High-efficiency step-down regulator in pulse-group mode; RESET ensures clean MCU initialization after battery insertion. Use Value: 48µA quiescent current extends shelf life and operational runtime without compromising 800mA burst capability. |
Use Scenario: Regulating 1.50V for real-time industrial controllers deployed in wide-temperature environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Robust DC-DC converter with thermal shutdown (160°C) and undervoltage lockout (2.20–2.55V) ensuring reliable operation across temperature extremes. Use Value: Guaranteed 800mA output and 1.50V accuracy over full temperature range simplifies thermal derating and system validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 1.5V fixed output, 3MHz switching, 750mA max, 22µA IQ in DCS-Control™ mode | Lacks integrated RESET output and voltage positioning; smaller 2mm × 2mm WSON package | Select when ultra-low IQ and minimal footprint outweigh need for RESET sequencing and transient optimization. |
| RT8059NGSP | 1.5V fixed output, 2MHz switching, 800mA max, 55µA IQ in auto-PFM mode, no RESET | No voltage positioning or soft-start control; uses external resistor divider for adjustable versions (not applicable here) | Choose for cost-sensitive designs where RESET and precise transient behavior are handled externally. |
Compared with TPS62231DRYR and RT8059NGSP, the MAX1572ETC150 uniquely integrates 170ms RESET, voltage positioning, and triple-mode control in a thermally enhanced 4mm × 4mm QFN - making it optimal for portable systems requiring coordinated power sequencing and minimal output variation under dynamic loads.
Availability
MAX1572ETC150 is available at Aetrix Electronics and suitable for smartphone power management, portable medical diagnostics, industrial handheld controllers, and digital camera subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1572ETC150 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 portable, industrial, and communications applications.
The MAX1572 series was designed specifically for high-efficiency, space-constrained DC-DC conversion in battery-powered portable electronics - emphasizing low IQ, small external components, and robust power-on reset functionality.
FAQ
What output voltage does the MAX1572ETC150 deliver?
The MAX1572ETC150 delivers a factory-trimmed fixed output voltage of 1.50V with ±2% accuracy over load, line, and temperature. This value is confirmed in the Chip Information table and Electrical Characteristics section, where output-voltage accuracy is specified as –2% to +2% at 800mA load and –40°C to +85°C ambient.
Does the MAX1572ETC150 require an external Schottky diode?
No, the MAX1572ETC150 does not require an external Schottky diode. It integrates both a P-channel high-side MOSFET and an N-channel low-side synchronous rectifier, enabling full synchronous rectification and eliminating conduction losses and board space associated with external diodes.
How is the RESET function timed in the MAX1572ETC150?
The MAX1572ETC150 provides a 170ms (minimum) active-low RESET signal that remains asserted until the output voltage reaches and sustains ≥90% of 1.50V for at least 170ms. The RESET pin is open-drain with an internal 14kΩ pullup to OUT, and timing is guaranteed across –40°C to +85°C.
What are the operating modes supported by the MAX1572ETC150?
The MAX1572ETC150 supports four operating modes controlled by EN1 and EN2 logic levels: shutdown (both low), pulse-group (EN1=0, EN2=1), pulse-skip (EN1=1, EN2=0), and forced-PWM (both high). Pulse-group mode achieves 48µA typical quiescent current, while forced-PWM maintains constant 2MHz switching for noise control.
What package type and thermal characteristics does the MAX1572ETC150 use?
The MAX1572ETC150 uses a 12-pin, 4mm × 4mm × 0.8mm thin QFN package with exposed thermal paddle. Its continuous power dissipation is 1349mW at +70°C (derating 16.9mW/°C above), and thermal shutdown activates at 160°C with 20°C hysteresis - ensuring safe operation under sustained 800mA loads in compact layouts.
MAX1572ETC150 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)
MAX1572ETC150 FAQ
1.How can I place an order for MAX1572ETC150 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1572ETC150 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 MAX1572ETC150 reliable?
The price and inventory of MAX1572ETC150 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1572ETC150 is usually 5 days.
3.What payment methods are accepted for MAX1572ETC150?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1572ETC150 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1572ETC150?
MAX1572ETC150 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1572ETC150 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 MAX1572ETC150?
For technical support, including MAX1572ETC150 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1572ETC150 requirements.
6.How does Aetrix verify that MAX1572ETC150 is sourced from the original manufacturer or authorized distributors?
All MAX1572ETC150 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 MAX1572ETC150 meets industry standards.
7.What is the process for return or replacement of MAX1572ETC150?
All MAX1572ETC150 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1572ETC150, 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 MAX1572ETC150 part is unused and in its original packaging.
Return procedure for MAX1572ETC150:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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