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Analog Devices Inc./Maxim Integrated MAXM17623AMB+
- Part No.:
- MAXM17623AMB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- DC DC Converters
- Package:
- 10-SMD Module
- Datasheet:
-
MAXM17623AMB+.pdf
- Description:
- IC REG BUCK ADJ 1A 10EMGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,545
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Product details
Overview
MAXM17623AMB+ from Maxim Integrated is a Himalaya-series synchronous step-down DC-DC power module integrating MOSFETs, compensation circuitry, and a 1.5µH inductor in a compact uSLIC™ package. It operates from 2.9V to 5.5V input, delivers up to 1A output current, regulates output voltage from 0.8V to 1.5V with ±1% feedback accuracy, and runs at a fixed 2MHz switching frequency-enabling high-density point-of-load regulation in battery-powered and industrial sensor systems.
For engineers reviewing the MAXM17623AMB+ datasheet, MAXM17623AMB+ pinout, MAXM17623AMB+ application, or MAXM17623AMB+ equivalent, key selection criteria include its 2MHz PWM-mode operation, 1ms soft-start, open-drain PGOOD output, internal compensation, and support for prebias startup-critical for reliable power sequencing in multi-rail embedded systems.
Technical Context
The MAXM17623AMB+ employs peak-current-mode control with fixed-frequency PWM operation (1.92–2.08MHz), internally compensated loop dynamics, and cycle-by-cycle overcurrent protection limiting inductor peak current to 1.7A (typ). Its architecture integrates a high-side pMOSFET and low-side nMOSFET with slope compensation and an error amplifier referenced to a stable 0.8V internal bandgap.
Startup behavior is defined by EN pin threshold (VEN_HIGH = 2V min), 1ms internal soft-start ramp, and latch-based MODE pin sampling at power-up-grounding MODE forces continuous PWM mode, while leaving it unconnected enables light-load PFM operation. The device supports 100% duty-cycle operation and maintains regulation during input brownout down to 2.72V (UVLO rising threshold).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9V to 5.5V - supports single-cell Li-ion, USB 5V, and standard logic rails without external LDO pre-regulation. |
| Output Voltage Range | 0.8V to 1.5V - factory-configured for core voltage domains of microcontrollers, FPGAs, and low-voltage ASICs. |
| Max Output Current | 1A continuous - sufficient for SoC cores, DSPs, and RF transceivers in space-constrained designs. |
| Switching Frequency | 2.00MHz (±4%) - enables use of sub-10µF ceramic output capacitors and reduces EMI filter size. |
| Feedback Accuracy | ±1% over temperature - ensures tight output regulation critical for sensitive analog and mixed-signal circuits. |
| Shutdown Current | 0.1µA (typ) - minimizes battery drain in always-on IoT edge nodes and portable instrumentation. |
| Thermal Shutdown | Rising threshold at 165°C with 10°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
MAXM17623AMB+ is housed in a 10-pin, 2.6mm × 2.1mm × 1.3mm uSLIC™ package (package code MA102A2+1), featuring separate signal (SGND) and power (PGND) ground pins to minimize noise coupling and optimize EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - LX | Switching node | Internal connection to integrated inductor and MOSFETs; no external trace-must be kept short and isolated from sensitive analog routing. |
| 2 - OUTSNS | Output voltage sense | Kelvin connection point for remote sensing; improves load regulation by rejecting PCB IR drop in high-current paths. |
| 3 - FB | Feedback input | Connects to resistor divider midpoint; sets output voltage via VFB = 0.8V reference-determines regulation setpoint with ±1% tolerance. |
| 4 - PGOOD | Open-drain power-good indicator | Asserts high after 184µs post-soft-start when VOUT ≥ 93.5% of target; used for system power sequencing and fault monitoring. |
| 5 - MODE | Operation mode select | Grounded = forced PWM (fixed 2MHz); floating = automatic PFM/PWM transition-optimizes efficiency across load range. |
| 6 - OUT | Power output | Main regulated output terminal; connects directly to output capacitor and load-requires low-ESR ceramic (≥10µF typical). |
| 7 - EN | Enable control | Active-high logic input (2V min threshold); controls full power-up/down sequence including soft-start and shutdown current < 0.1µA. |
| 8 - SGND | Signal ground reference | Reference for FB, MODE, PGOOD, and EN; must tie to PGND at single point near IN bypass capacitor to avoid ground bounce. |
| 9 - PGND | Power ground return | High-current return path for inductor and MOSFETs; requires solid copper pour and direct connection to input capacitor negative terminal. |
| 10 - IN | Input power supply | Accepts 2.9–5.5V; requires local 2.2µF ceramic decoupling placed adjacent to IN/PGND pins to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5µH inductor + MOSFETs + compensation | Eliminates 12+ external components and layout-sensitive loop tuning-reduces design time and validation risk. |
| Prebias startup capability | Enables safe power-up into existing output voltage (e.g., multi-rail SoCs), preventing reverse current and bus contention. |
| 100% duty-cycle operation | Maintains regulation down to VIN ≈ VOUT, extending usable input range in battery discharge scenarios. |
| All-ceramic capacitor support | Enables compact, low-profile designs using only MLCCs-no tantalum or electrolytic capacitors required. |
| JESD22-B103/B104/B111 qualified | Validated for mechanical robustness in harsh environments-drop, shock, and vibration resistance for industrial and automotive applications. |
Applications
| Point-of-Load Regulation | Industrial Sensor Nodes |
|---|---|
|
Use Scenario: Powering ARM Cortex-M7 MCU core rail (1.2V @ 800mA) on a 4-layer industrial PLC I/O module with strict EMI limits. IC Role / Device Role / Timing Role: Primary step-down regulator delivering tightly regulated, low-noise core voltage with fast transient response (< 20mV deviation under 0.5A step load). Use Value: Internal 2MHz switching and integrated LC filter reduce conducted emissions by >15dB vs. discrete solutions-meeting CISPR-22 Class B without added ferrites. |
Use Scenario: Supplying 0.9V/1A to a precision ADC and 1.5V/300mA to a low-power wireless SoC in a battery-operated environmental sensor node. IC Role / Device Role / Timing Role: Dual-output-capable power source enabling independent voltage scaling and ultra-low quiescent current (0.1µA shutdown) for 10-year battery life. Use Value: PFM mode extends light-load efficiency to >85% at 10mA, doubling runtime versus fixed-frequency alternatives in intermittent wake-up cycles. |
| Battery-Powered Medical Wearables | Distributed Power Systems |
|
Use Scenario: Regulating 1.2V for a Bluetooth LE radio and 0.8V for a biosensor ASIC in a compact ECG patch powered by a 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Single-chip power solution supporting dynamic voltage scaling and seamless prebias startup during radio transmit bursts. Use Value: 1ms soft-start prevents inrush-induced brownout on shared battery rail; 100% duty-cycle operation sustains regulation until battery drops to 1.2V. |
Use Scenario: Providing localized 1.5V/1A supplies to FPGA I/O banks across a large-format industrial vision camera backplane with distributed 5V input. IC Role / Device Role / Timing Role: Modular, plug-and-play POL converter minimizing board area and eliminating custom magnetics per rail. Use Value: uSLIC™ footprint (2.6mm × 2.1mm) allows placement directly beneath FPGA BGA-reducing trace inductance and improving PSRR above 1MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down power module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAXM17624AMB+ | Fixed 4MHz switching frequency; output voltage range 1.5V–3.3V; integrated 1µH inductor. | Targeted at higher-VOUT rails (e.g., 2.5V/3.3V I/O, memory, or interface supplies) where smaller inductance enables faster transient response. | Select MAXM17624AMB+ when output voltage >1.5V is required and PCB area constraints favor higher-frequency operation. |
| TPS826718SIPR | 1.8V fixed output; 2.2MHz switching; 0.8A max current; 2.05mm × 2.05mm × 1.05mm package; no MODE pin or PGOOD. | Limited to fixed 1.8V output; lacks programmability, power-good signaling, and prebias startup-suited for cost-sensitive, single-rail consumer wearables. | Choose TPS826718SIPR only for non-critical 1.8V rails where feature reduction and lower cost outweigh flexibility and reliability requirements. |
Compared with MAXM17624AMB+, MAXM17623AMB+ provides tighter low-VOUT regulation (0.8V–1.5V) and lower inductor DCR for improved light-load efficiency; versus TPS826718SIPR, it offers full voltage adjustability, robust sequencing features, and industrial-grade thermal/EMI performance-justifying its use in mission-critical embedded systems.
Availability
MAXM17623AMB+ is available at Aetrix Electronics and suitable for point-of-load power supplies, battery-powered medical wearables, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAXM17623AMB+ 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, automotive, and communications markets.
The Himalaya uSLIC™ power module product line was designed to eliminate design complexity in compact, high-reliability power systems-integrating magnetics, MOSFETs, and control logic into thermally optimized, drop-tested modules for demanding embedded applications.
FAQ
What is the maximum output current capability of the MAXM17623AMB+?
The MAXM17623AMB+ delivers up to 1A of continuous output current under specified thermal conditions (TA ≤ +125°C, four-layer board). Derating applies above +85°C ambient; full 1A is guaranteed at VIN = 3.3V and VOUT = 1.2V with proper PCB copper area and airflow. The device includes cycle-by-cycle overcurrent protection limiting peak inductor current to 1.7A (typ) to safeguard against short-circuit faults.
Does the MAXM17623AMB+ support startup into a prebiased output?
Yes, the MAXM17623AMB+ supports safe startup into a prebiased output voltage in both PWM and PFM modes. This feature prevents reverse current flow and avoids discharging the output capacitor-critical for multi-rail systems where other regulators may already be active. Startup timing and regulation stability are maintained regardless of initial VOUT level, as confirmed in Figures toc55 and toc56 of the official datasheet.
How does the MODE pin affect efficiency and noise performance of the MAXM17623AMB+?
When the MODE pin is grounded, MAXM17623AMB+ operates in forced PWM mode at fixed 2MHz-ensuring constant switching frequency for predictable EMI filtering but reducing light-load efficiency. When left floating, it enters PFM mode below ~100mA load, skipping pulses to achieve >85% efficiency at 10mA. PFM introduces variable frequency content, so PWM is preferred in noise-sensitive RF sections, while PFM maximizes battery life in idle states.
What is the purpose of the OUTSNS pin on the MAXM17623AMB+?
The OUTSNS pin on the MAXM17623AMB+ provides Kelvin sensing of the output voltage at the load, separate from the main OUT pin. By routing OUTSNS directly to the positive terminal of the output capacitor with a dedicated trace, voltage drop across PCB traces and parasitic resistance is excluded from feedback-improving load regulation accuracy to ±1% across 0–1A load steps, especially critical in high-current, low-VOUT applications like processor cores.
Can the MAXM17623AMB+ operate with 100% duty cycle, and why is this important?
Yes, the MAXM17623AMB+ supports true 100% duty-cycle operation, allowing VOUT to remain regulated even when VIN drops to within ~100mV of the output voltage. This is essential in battery-powered systems where input voltage declines during discharge-e.g., sustaining 1.2V output down to a 1.3V Li-ion cell voltage-eliminating the need for inefficient linear post-regulation and maximizing usable battery capacity.
MAXM17623AMB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-SMD Module
- Packaging:
- Strip
- Product Status:
- Active
- Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output 1:
- -
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- -
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-eMGA (2.6x2.1)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MAXM17623AMB+ FAQ
1.How can I place an order for MAXM17623AMB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAXM17623AMB+ 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 MAXM17623AMB+ reliable?
The price and inventory of MAXM17623AMB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAXM17623AMB+ is usually 5 days.
3.What payment methods are accepted for MAXM17623AMB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAXM17623AMB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAXM17623AMB+?
MAXM17623AMB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAXM17623AMB+ 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 MAXM17623AMB+?
For technical support, including MAXM17623AMB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAXM17623AMB+ requirements.
6.How does Aetrix verify that MAXM17623AMB+ is sourced from the original manufacturer or authorized distributors?
All MAXM17623AMB+ 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 MAXM17623AMB+ meets industry standards.
7.What is the process for return or replacement of MAXM17623AMB+?
All MAXM17623AMB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAXM17623AMB+, 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 MAXM17623AMB+ part is unused and in its original packaging.
Return procedure for MAXM17623AMB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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