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Analog Devices Inc./Maxim Integrated MAX15103EWL+T
- Part No.:
- MAX15103EWL+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 15-WFBGA, WLBGA
- Datasheet:
-
MAX15103EWL+T.pdf
- Description:
- IC REG LINEAR POS ADJ 3A 15WLP
- Quantity:
- Payment:
- Shipping:
Inventory:7,767
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Product details
Overview
The MAX15103EWL+T from Maxim Integrated is a 3A, low-dropout linear regulator (LDO) with p-channel MOSFET pass element, designed for precision power delivery in high-density server, networking, and telecom infrastructure. It operates from 1.7V to 5.5V input, delivers adjustable output from 0.6V to 5.2V, guarantees ≤200mV dropout at 3A load, achieves ±1.6% output accuracy over line/load/temperature, and features integrated power-good (PG), enable (EN), and soft-start/bypass (SS_BYP) pins for robust power sequencing in multi-rail systems.
For engineers reviewing the MAX15103EWL+T datasheet, MAX15103EWL+T pinout, MAX15103EWL+T application, or MAX15103EWL+T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative LDOs for supply chain flexibility in telecom/datacom power rails.
Technical Context
The MAX15103EWL+T uses an internal p-channel MOSFET pass transistor with 20mΩ RDS(ON), enabling ultra-low dropout and minimal quiescent current (1.8–3.5mA at 3A) even under dropout conditions. Its feedback loop references a precise 600mV FB threshold with ±10mV accuracy over temperature and load, supporting stable regulation down to 0.6V.
It integrates foldback current limiting (3.7A in-regulation, collapsing to 1.8A during short-circuit), thermal shutdown at +160°C with 15°C hysteresis, and a dedicated SS_BYP pin that simultaneously controls soft-start ramp time (via external CSS capacitor) and reduces output noise via bypass capacitance - all without requiring external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports single-rail core logic or memory power in compact 1U servers without parallel devices. |
| Dropout Voltage | ≤200mV at 3A - enables operation with minimal VIN–VOUT margin (e.g., 1.8V IN → 1.6V OUT), reducing power loss and heat generation. |
| Output Accuracy | ±1.6% over line/load/temperature - ensures reliable compliance with tight voltage tolerances of modern ASICs and FPGAs. |
| Output Noise | 15µVRMS (500Hz–100kHz) - meets low-noise requirements for sensitive analog circuitry and PLL power domains. |
| PSRR | 40dB at 100kHz - suppresses high-frequency switching noise from upstream DC-DC converters feeding the LDO input. |
| Thermal Shutdown | +160°C with 15°C hysteresis - protects against sustained overload while allowing recovery after transient thermal events. |
| Soft-Start Control | 9.2µA constant-current charge into external CSS capacitor - enables programmable startup ramp (e.g., 100nF → ~6.3ms) to limit inrush current. |
Pinout & Package
The MAX15103EWL+T is housed in a 15-bump, 1.6mm × 2.7mm Wafer-Level Package (WLP) with bottom-side solder bumps. Thermal performance relies on PCB copper area and thermal vias connected to GND; θJA = 30°C/W on a 4-layer JEDEC-standard board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (EN) | Active-high enable input | Drives internal bias circuits ON/OFF; connects to IN for always-on operation; pulls down internally during shutdown to discharge SS_BYP capacitor. |
| A2 (PG) | Open-drain power-good output | Asserts high when VOUT is within ±3% of target; 650mV threshold with 15mV hysteresis; sinks 2mA max; used for sequenced power-up of downstream rails. |
| A3 (GND) | Ground reference | Primary return path for load current and control circuitry; must be low-impedance connection to system ground plane. |
| A4 (SS_BYP) | Bypass/soft-start input | Accepts external ceramic capacitor (30–100nF) to set soft-start time and reduce output noise; unconnected disables soft-start. |
| A5 (FB) | Feedback input | Senses output voltage via resistive divider; 600mV nominal threshold; input bias current ≤1µA enables high-value resistor selection. |
| B1–B5, C1–C5 (IN) | Input supply voltage | Distributed input pads minimize IR drop and EMI; requires ≥2.2µF ceramic bypass capacitor placed within 6mm of any IN bump. |
| C1–C5 (OUT) | Regulated output | Distributed output pads support high-current delivery; requires ≥22µF ceramic output capacitor with ≤50mΩ ESR for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| p-Channel Pass Transistor | 20mΩ RDS(ON) enables low dropout and <3.5mA ground current at 3A - avoids base-drive losses inherent in PNP-based LDOs. |
| Foldback Current Limit | 3.7A in-regulation limit collapses exponentially to 1.8A when VOUT drops to 17% of nominal - sustains indefinite short-circuit without damage. |
| Integrated Power-Good | Open-drain PG output with 100µs delay and 650mV threshold - eliminates need for external supervisor IC in multi-rail sequencing. |
| Adjustable Output (0.6V–5.2V) | Uses standard 600mV FB reference and external resistor divider - supports diverse core voltages (e.g., 0.85V CPU, 1.2V DDR, 3.3V I/O) with one BOM item. |
| Low-Noise Bypass Path | SS_BYP pin accepts external capacitor to shunt high-frequency noise on FB node - improves PSRR and reduces output ripple without extra filtering stages. |
Applications
| Telecom Line Cards | High-Density Server DIMMs |
|---|---|
|
Use Scenario: Powering FPGA configuration banks and SerDes analog supplies on carrier-grade line cards where EMI and thermal density are tightly constrained. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering clean 1.2V/1.8V from intermediate 3.3V rail; PG signal coordinates FPGA initialization sequence. Use Value: 15µVRMS noise and 40dB PSRR at 100kHz prevent bit errors in 10G/25G serial links; 200mV dropout allows use of smaller input capacitors and lower-cost upstream converters. |
Use Scenario: Supplying DDR4/DDR5 memory termination voltage (VTT) and reference voltage (VREF) in 2U/1U rack servers with strict board space limits. IC Role / Device Role / Timing Role: Dual-role LDO providing both VTT (0.6V) and VREF (0.6 × VDDQ) with matched tracking; EN/PG pins synchronize with memory controller power-up. Use Value: ±1.6% accuracy ensures VREF stays within JEDEC-specified ±1% window; 1.6mm × 2.7mm WLP footprint fits between memory chips without compromising routing. |
| 5G Base Station RF Front-End | Optical Transceiver Modules |
|
Use Scenario: Biasing GaN power amplifiers and low-noise amplifiers in active antenna units where thermal cycling and reliability are critical. IC Role / Device Role / Timing Role: Local point-of-load regulator for RF ICs; thermal shutdown (+160°C) and foldback protection guard against antenna mismatch faults. Use Value: 3A capability supports burst-mode PA operation; -40°C to +85°C rating matches outdoor base station environmental specs; no external compensation required simplifies layout. |
Use Scenario: Providing ultra-stable 3.3V and 2.5V supplies to laser diode drivers and transimpedance amplifiers in SFP+/QSFP modules. IC Role / Device Role / Timing Role: Secondary LDO cleaning noisy switcher output; SS_BYP pin reduces jitter-inducing noise on clock distribution paths. Use Value: Soft-start prevents optical module hot-plug inrush from disrupting host switch fabric; 1.6mm × 2.7mm size fits inside pluggable module housing with <10mm height budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS7A8300RGRT | 3A, 50µVRMS noise, 200mV dropout, but requires external compensation and larger 2.0mm × 2.0mm QFN package. | Lacks integrated PG and SS_BYP; needs external supervisor and RC network for sequencing. | Choose when lowest possible noise (<50µVRMS) is mandatory and board space permits larger footprint and extra components. |
| Analog Devices ADM7172ACPZ-R7 | 3A, 12µVRMS noise, 175mV dropout, but only supports fixed 1.2V/1.8V/2.5V/3.3V outputs - no adjustable 0.6V option. | No FB pin; cannot generate sub-1V core voltages required by latest ASICs/FPGAs. | Choose for fixed-voltage, ultra-low-noise applications where 0.6V adjustability is unnecessary and 12µVRMS noise justifies higher cost. |
Compared with TPS7A8300RGRT and ADM7172ACPZ-R7, the MAX15103EWL+T uniquely combines adjustable 0.6V–5.2V output, integrated PG/EN/SS_BYP, 1.6mm × 2.7mm WLP size, and 15µVRMS noise - making it optimal for space-constrained, multi-voltage telecom and server designs requiring full sequencing control without external components.
Availability
The MAX15103EWL+T is available at Aetrix Electronics and suitable for telecom infrastructure, high-density server power rails, and 5G base station RF subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX15103EWL+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 and mixed-signal ICs for demanding applications in communications, computing, and industrial systems.
The MAX15103EWL+T belongs to Maxim's high-current, low-noise LDO family targeting next-generation datacom and telecom equipment where small size, precision regulation, and integrated power management features are essential.
FAQ
What is the minimum output voltage supported by the MAX15103EWL+T?
The MAX15103EWL+T supports an adjustable output voltage down to 0.6V, set using an external resistive divider connected to the FB pin. This 0.6V minimum enables direct powering of advanced low-voltage cores such as ARM Cortex-A7x processors and DDR5 VDDQ rails. The FB threshold is precisely 600mV with ±10mV tolerance over temperature and load, ensuring accurate regulation at sub-1V levels.
Does the MAX15103EWL+T require external compensation components?
No, the MAX15103EWL+T is internally compensated and does not require external compensation components. Its stability is guaranteed with a minimum 22µF ceramic output capacitor having ≤50mΩ ESR, as specified in the datasheet. This eliminates the need for external RC networks or compensation pins, simplifying layout and reducing BOM count for the MAX15103EWL+T in high-density applications.
How does the SS_BYP pin function in the MAX15103EWL+T?
The SS_BYP pin on the MAX15103EWL+T serves dual functions: it acts as a soft-start control input (charged by a precise 9.2µA internal current source to set ramp time) and as a noise-reduction bypass node (shunting high-frequency noise on the FB path). Connecting a 100nF capacitor from SS_BYP to GND yields ~6.3ms soft-start and simultaneously lowers output voltage noise - both functions are implemented without additional external circuitry for the MAX15103EWL+T.
What thermal protection features does the MAX15103EWL+T include?
The MAX15103EWL+T includes thermal shutdown at +160°C with 15°C hysteresis and foldback current limiting that reduces output current from 3.7A to 1.8A during overloads. These features protect the device during sustained short-circuit or high-ambient conditions. For continuous operation, the junction temperature must remain ≤+125°C - achievable with proper PCB copper area and thermal vias, as the MAX15103EWL+T's θJA is 30°C/W on a standard 4-layer board.
Can the MAX15103EWL+T be used in automotive applications?
The MAX15103EWL+T is specified for -40°C to +85°C operation and is not qualified to AEC-Q100 automotive standards. While its temperature range overlaps with some automotive cabin applications, it lacks automotive-grade qualification, extended life testing, and failure-in-time (FIT) data required for automotive use. For automotive designs, engineers should select explicitly qualified alternatives rather than relying on the MAX15103EWL+T.
MAX15103EWL+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 15-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.2V
- Voltage Dropout (Max):
- 0.2V @ 3A
- Current - Output:
- 3A
- Current - Quiescent (Iq):
- 3.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 40dB (100kHz)
- Control Features:
- Enable, Power Good, Soft Start
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-WLP (1.58x2.66)
MAX15103EWL+T FAQ
1.How can I place an order for MAX15103EWL+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX15103EWL+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 MAX15103EWL+T reliable?
The price and inventory of MAX15103EWL+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX15103EWL+T is usually 5 days.
3.What payment methods are accepted for MAX15103EWL+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX15103EWL+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX15103EWL+T?
MAX15103EWL+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX15103EWL+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 MAX15103EWL+T?
For technical support, including MAX15103EWL+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX15103EWL+T requirements.
6.How does Aetrix verify that MAX15103EWL+T is sourced from the original manufacturer or authorized distributors?
All MAX15103EWL+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 MAX15103EWL+T meets industry standards.
7.What is the process for return or replacement of MAX15103EWL+T?
All MAX15103EWL+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX15103EWL+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 MAX15103EWL+T part is unused and in its original packaging.
Return procedure for MAX15103EWL+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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