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Analog Devices Inc./Maxim Integrated MAX1572ETC130+
- Part No.:
- MAX1572ETC130+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX1572ETC130+.pdf
- Description:
- IC REG BUCK 1.3V 800MA 12TQFN
- Quantity:
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Inventory:3,525
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Product details
Overview
MAX1572ETC130+ from Maxim Integrated is a fixed-frequency, synchronous step-down DC-DC converter optimized for powering 1.30V microprocessor/DSP cores in space-constrained portable electronics. It delivers up to 800mA output current from a 2.6V–5.5V input, operates at 2MHz switching frequency, achieves up to 97% efficiency, and integrates a 170ms (min) active-low RESET output. It is used in smartphones and digital cameras where compact size and high light-load efficiency are critical.
For engineers reviewing the MAX1572ETC130+ datasheet, MAX1572ETC130+ pinout, MAX1572ETC130+ application, or MAX1572ETC130+ equivalent, key selection criteria include its 1.30V preset output voltage, 48µA typical quiescent current in pulse-group mode, 12-pin 4mm × 4mm thin QFN package with exposed paddle, and support for forced-PWM, pulse-skip, and pulse-group operating modes.
Technical Context
The MAX1572ETC130+ employs a 2MHz fixed-frequency current-mode PWM control architecture with internal slope compensation to ensure stability and fast transient response. Its dual-MOSFET synchronous rectification eliminates the need for an external Schottky diode and enables 100% duty-cycle operation near dropout.
It implements voltage positioning to match load regulation with transient droop-reducing total output voltage variation by half-and features three selectable power-saving modes (pulse-group, pulse-skip, forced-PWM) controlled via EN1/EN2 logic inputs. The integrated 170ms RESET timer monitors VOUT against 90% of nominal and asserts open-drain low on undervoltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.30V ±2% (voltage-positioning enabled; supports tight core rail tolerance) |
| Max Output Current | 800mA continuous (supports DSP/microprocessor core loads without derating) |
| Input Voltage Range | 2.6V to 5.5V (compatible with single-cell Li-ion, Li-poly, or 3.3V/5V system rails) |
| Switching Frequency | 2MHz ±10% (enables use of tiny 2.2µH inductor and 10µF ceramic output capacitor) |
| Quiescent Current | 48µA typical in pulse-group mode (extends battery life in standby/sleep states) |
| RESET Delay | 170ms minimum after VOUT reaches 90% (ensures reliable power-on reset for processors) |
| Shutdown Current | 0.1µA typical (minimizes battery drain during full system shutdown) |
| Efficiency Peak | Up to 97% at mid-load (reduces thermal stress and improves power density) |
Pinout & Package
MAX1572ETC130+ is housed in a 12-pin, 4mm × 4mm × 0.8mm thin QFN package with exposed thermal paddle (EP), rated for -40°C to +85°C operation. The exposed paddle must be soldered to a PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Open-drain reset output | Pulled low until VOUT stabilizes at ≥90% of 1.30V; internal 14kΩ pullup to OUT ensures clean processor reset signaling |
| 2 (SS) | Soft-start control | Connects to GND via capacitor (e.g., 1000pF) to linearly ramp output voltage and eliminate inrush current |
| 3, 5, 11 (GND) | Signal ground | Must be tied to exposed paddle and PGND; provides low-impedance return path for feedback and logic circuits |
| 4 (OUT) | Output voltage sense | Direct connection to regulated output node; internal discharge path to GND in shutdown prevents floating bias |
| 6 (EN2) | Enable/Mode control input 2 | Logic input defining operating mode per truth table (e.g., EN1=0, EN2=1 → pulse-group mode) |
| 7 (PGND) | Power ground | Primary return path for high-current LX switching node; must connect directly to exposed paddle |
| 8 (LX) | Switch node | Drives external 2.2µH inductor; high-impedance in shutdown; internal clamp diodes protect against inductive kickback |
| 9 (BATT) | Main supply input | Accepts 2.6V–5.5V; requires local 10µF ceramic bypass capacitor to minimize input ripple and EMI |
| 10 (EN1) | Enable/Mode control input 1 | Paired with EN2 to select shutdown, pulse-group, pulse-skip, or forced-PWM operation |
| 12 (ABATT) | Analog supply input | Filtered via 10Ω resistor and 0.1µF capacitor to isolate noise-sensitive internal reference and control circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Voltage positioning | Matches output droop during load transients to prevent overshoot-halving total output voltage variation versus conventional regulators |
| Synchronous rectification | Integrated P-channel high-side and N-channel low-side MOSFETs eliminate external Schottky diode, reducing BOM count and conduction losses |
| Triple power-save modes | Pulse-group (48µA IQ), pulse-skip (faster wake-up, lower ripple), and forced-PWM (fixed 2MHz, predictable EMI spectrum) selectable via EN1/EN2 |
| 170ms RESET timer | Guaranteed minimum delay ensures stable core voltage before releasing processor reset-no external timing components required |
| 100% duty-cycle capability | Enables operation with VIN as low as VOUT + IOUT × (RDS(ON)P + RL); supports ultra-low dropout in battery-critical conditions |
| Soft-start with zero inrush | Controlled voltage ramp via SS pin prevents input current spikes during startup-protects source and avoids brownout |
Applications
| Smartphone Core Power | Digital Camera Baseband |
|---|---|
|
Use Scenario: Powers 1.30V ARM-based application processor core in LTE smartphone during active and sleep cycles. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated core voltage with dynamic load response. Use Value: 97% peak efficiency and 48µA quiescent current extend talk time; 2MHz switching minimizes board area occupied by passive components. |
Use Scenario: Supplies 1.30V to baseband IC in high-resolution digital camera during image capture and playback. IC Role / Device Role / Timing Role: High-transient-response DC-DC converter maintaining stable core rail during burst-mode sensor readout and video encoding. Use Value: Voltage positioning prevents output overshoot when baseband load drops post-capture; 170ms RESET ensures clean boot after power recovery. |
| Portable Media Player SoC | Handheld Test Instrument MCU |
|
Use Scenario: Regulates 1.30V supply for SoC in MP3/DVD player with variable audio/video decoding load. IC Role / Device Role / Timing Role: Efficient step-down converter supporting wide dynamic load range (1mA–800mA) with minimal output ripple. Use Value: Pulse-group mode reduces IQ to 48µA during music playback pause; forced-PWM mode suppresses audible noise during sensitive analog stages. |
Use Scenario: Provides 1.30V core voltage to precision measurement MCU in battery-powered handheld multimeter. IC Role / Device Role / Timing Role: Low-noise, high-accuracy power source with guaranteed RESET assertion during brownout events. Use Value: 5mVP-P output ripple and <±2% output accuracy maintain ADC reference stability; 0.1µA shutdown current preserves battery over months of storage. |
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 |
|---|---|---|---|
| TPS62231DRYR | Fixed 1.3V output, 3MHz switching, 600mA max, 22µA IQ in DCS-Control™ mode, 6-pin WSON | Limited current capacity and no integrated RESET; requires external reset IC for processor sequencing | Preferred for ultra-small footprint designs where 600mA suffices and RESET is handled separately |
| RT8059ZSP | Adjustable 0.6V–3.3V output, 2MHz, 800mA, 55µA IQ in PS mode, 8-pin WDFN, no RESET | Requires external resistor divider and reset supervisor; lacks voltage positioning and fixed 1.30V option | Suitable when output voltage flexibility is needed and system-level reset management is already implemented |
Compared with MAX1572ETC130+, TPS62231DRYR offers higher switching frequency and smaller package but lower current and no RESET; RT8059ZSP provides adjustable output and similar current but adds design complexity for voltage setting and reset generation-making MAX1572ETC130+ optimal for drop-in 1.30V core rail replacement with integrated sequencing.
Availability
MAX1572ETC130+ is available at Aetrix Electronics and suitable for smartphone core power, digital camera baseband supplies, portable media player SoCs, handheld test instrument MCUs, and PCMCIA card power conversion requiring stable component supply across industrial temperature ranges.
Supply support for MAX1572ETC130+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for portable, industrial, and communications systems.
The MAX1572 product line was designed specifically for high-efficiency, small-footprint DC-DC conversion in battery-powered microprocessor core applications-emphasizing light-load IQ, integrated RESET, and voltage positioning for transient robustness.
FAQ
What is the exact output voltage of the MAX1572ETC130+?
The MAX1572ETC130+ has a factory-trimmed fixed output voltage of 1.30V, with guaranteed accuracy of ±2% over load, line, and temperature (-40°C to +85°C). This value is confirmed in the Ordering Information table and Electrical Characteristics section of the datasheet, where "ETC130" explicitly denotes the 1.30V variant. The device does not support external adjustment.
Does the MAX1572ETC130+ require an external Schottky diode?
No, the MAX1572ETC130+ does not require an external Schottky diode. It integrates both a P-channel high-side switch and an N-channel synchronous rectifier, enabling full synchronous rectification. This eliminates conduction losses associated with external diodes and reduces thermal dissipation-confirmed in the Features list and Typical Operating Circuit diagram.
How is the RESET function timed in the MAX1572ETC130+?
The MAX1572ETC130+ asserts its open-drain RESET output low until the regulated output reaches and sustains ≥90% of 1.30V (i.e., ≥1.17V), then holds it low for a minimum of 170ms. This delay is internally generated and independent of external components. The RESET pin is pulled up to the OUT node via an internal 14kΩ resistor, ensuring proper logic-level signaling to processors.
Which operating mode gives the lowest quiescent current for the MAX1572ETC130+?
Pulse-group mode delivers the lowest quiescent current for the MAX1572ETC130+: 48µA typical at light loads. This mode fully disables noncritical internal circuitry when VOUT rises 0.8% above 1.30V, resuming switching only when VOUT falls below that threshold. Pulse-skip mode draws higher IQ (~700µA), while forced-PWM draws significantly more due to continuous 2MHz switching.
What package type and thermal pad configuration does the MAX1572ETC130+ use?
The MAX1572ETC130+ uses a 12-pin, 4mm × 4mm × 0.8mm thin QFN package with exposed thermal paddle (EP). The exposed paddle must be soldered to a PCB copper pour connected to PGND and GND pins (pins 3, 5, 7, 11) to ensure adequate thermal dissipation and electrical performance-per the Package Information and Pin Description sections of the datasheet.
MAX1572ETC130+ 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:
- -
MAX1572ETC130+ FAQ
1.How can I place an order for MAX1572ETC130+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1572ETC130+ 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 MAX1572ETC130+ reliable?
The price and inventory of MAX1572ETC130+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1572ETC130+ is usually 5 days.
3.What payment methods are accepted for MAX1572ETC130+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1572ETC130+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1572ETC130+?
MAX1572ETC130+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1572ETC130+ 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 MAX1572ETC130+?
For technical support, including MAX1572ETC130+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1572ETC130+ requirements.
6.How does Aetrix verify that MAX1572ETC130+ is sourced from the original manufacturer or authorized distributors?
All MAX1572ETC130+ 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 MAX1572ETC130+ meets industry standards.
7.What is the process for return or replacement of MAX1572ETC130+?
All MAX1572ETC130+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1572ETC130+, 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 MAX1572ETC130+ part is unused and in its original packaging.
Return procedure for MAX1572ETC130+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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