MAX15300ETI+T - Auto-Comp Digital PoL Controller | Maxim Integrated
MPN: MAX15300ETI+T ✓ نشطMAX15300ETI+T نظرة عامة
A digital Point-of-Load controller is a power-management IC that regulates a low-voltage, high-current DC rail directly at the point where the load (CPU, ASIC, FPGA, memory) consumes it, replacing traditional analog PWM controllers. PoL controllers sit one tier below an intermediate bus converter (typically 12V) and one tier above the load device in the distributed power architecture. The 'Auto-Comp' feature refers to the controller's ability to autonomously measure the output filter characteristics and compute optimal PID loop compensation, eliminating the manual design step normally required for buck converters.
Key features include adaptive dead-time control, cycle-by-cycle current limiting, pre-bias monotonic startup, and four selectable switching frequencies (600/800/1000/1200 kHz). The internal 8-bit ADC digitizes output voltage, current, and temperature for closed-loop regulation and PMBus reporting, and fault events trigger configurable responses including retry, latch-off, or warning-only behavior. The PMBus interface enables remote margining, sequencing, and real-time telemetry across a 2-wire SMBus-compatible serial bus.
Typical applications include powering FPGAs, ASICs, and DSPs from 12V intermediate bus architectures, telecom and networking line cards, server motherboard DC-DC VRM stages, base-station power modules, and any distributed-power PCB where adaptive compensation simplifies design-in. The TQFN-EP package provides a low thermal-resistance path for the controller itself, although most thermal dissipation is in the external MOSFETs it drives.
Designers should pair the MAX15300ETI+T with a current-sense element (Rsense or DCR sensing) and follow the manufacturer's inductor and capacitor selection guidelines to achieve the desired ripple and transient response. The PMBus device address is set by an external resistor, allowing multiple controllers on the same bus. Programmable soft-start and output-voltage margining make the device especially attractive for multi-rail systems that require coordinated sequencing.
بدائل مباشرة لـ MAX15300ETI+T — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MAX15300ETI+T (نفس عامل الشكل والبصمة) — يختلف في Control Method, Digital Interface, Output Voltage Range, Package, Topology.
MAX15301ETI+T
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX15302ETI+T
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
MAX15300ETI+T-T
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX15300AETI+T
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
LTC3811EUFD#PBF
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX15300ETI+T الحدود القصوى والخصائص الكهربائية
| البنية الطوبولوجية | Synchronous Buck Controller (PoL) |
| نطاق جهد الدخل | 4.7 V to 24 V |
| نطاق جهد الخرج | 0.6 V to 5.25 V |
| عدد المخارج | 1 |
| Maximum Output Current (external MOSFET dependent) | 30 A+ typical design point |
| تردد التبديل | 600 / 800 / 1000 / 1200 kHz (programmable) |
| Control Method | Digital PID with Auto-Compensation |
| Digital Interface | PMBus 1.2/1.3-compatible SMBus |
| Internal ADC | 8-bit (VOUT, IOUT, temperature telemetry) |
| Current Sense Method | Rsense or inductor DCR sensing |
| بدء التشغيل الناعم | Programmable via PMBus |
| Pre-Bias Startup | Monotonic (yes) |
| العلبة | 28-pin TQFN-EP (5x5 mm) |
| نوع التركيب | Surface Mount |
| Lead-Free / RoHS | Lead-free, RoHS3 compliant per distributor listings |
تكوين أطراف MAX15300ETI+T
| دبوس 1 | PVCC — Gate-driver supply for external MOSFETs |
| دبوس 2 | LX — Switch-node connection to external L/MOSFET drain |
| دبوس 3 | BST — Bootstrap supply for high-side gate driver |
| دبوس 4 | DH — High-side gate-drive output |
| دبوس 5 | DL — Low-side gate-drive output |
| دبوس 6 | PGND — Power ground return for gate drivers |
| دبوس 7 | AGND — Analog ground for sensitive references |
| دبوس 8 | VSENSE — Output-voltage remote-sense input |
| دبوس 9 | CSN — Current-sense negative input |
| دبوس 10 | CSP — Current-sense positive input |
| دبوس 11 | TSENSE — External temperature-sense input |
| دبوس 12 | REF — Internal reference decoupling |
| دبوس 13 | EN — Enable input (active high) |
| دبوس 14 | PGOOD — Power-good output (open drain) |
| دبوس 15 | FAULT — Fault output (open drain) |
| دبوس 16 | FSEL0 — Frequency-select bit 0 |
| دبوس 17 | FSEL1 — Frequency-select bit 1 |
| دبوس 18 | ADDR — PMBus address-select resistor input |
| دبوس 19 | SDA — PMBus serial data (SMBus) |
| دبوس 20 | SCL — PMBus serial clock (SMBus) |
| دبوس 21 | ALERT — PMBus alert output (open drain) |
| دبوس 22 | VDD — Internal supply decoupling |
| دبوس 23 | VIN — Input voltage monitor |
| دبوس 24 | VOUT — Output voltage monitor |
| دبوس 25 | NC — Not connected (per datasheet) |
| دبوس 26 | NC — Not connected (per datasheet) |
| دبوس 27 | NC — Not connected (per datasheet) |
| دبوس 28 | EP — Exposed pad (thermal/ground) |
التطبيقات النموذجية
MAX15300ETI+T مناسب لـ 6 التطبيقs: FPGA / ASIC Core Rail Power, Server / Storage VRM, Telecom Line-Card Power, Industrial Distributed Power Modules, Base Station / RF Subsystem Power, Test & Measurement Instrumentation.
FPGA / ASIC Core Rail Power
The MAX15300ETI+T regulates a low-voltage core rail directly at an FPGA or ASIC load, accepting a 12V intermediate bus and producing 0.6V-5.25V at up to 30A. According to the manufacturer datasheet, its PMBus telemetry reports VOUT/IOUT/temperature for FPGA health monitoring, and pre-bias monotonic startup prevents back-feeding current into a partially-energized load. Auto-Compensation eliminates the manual PID tuning normally required when the FPGA's bulk capacitance differs from prior designs, shortening bring-up.
موصى به
Server / Storage VRM
In server and storage motherboard power trees, the MAX15300ETI+T serves as a single-phase PoL stage deriving 1.0V-3.3V rails from a 12V bus. According to the manufacturer datasheet, its 4.7-24V input range covers 12V standard rails, while programmable switching frequency (600/800/1000/1200 kHz) allows the designer to trade efficiency against inductor size for different rails. PMBus sequencing aligns startup order across CPU, memory, and ASIC rails, critical for VR13-class servers.
موصى به
Telecom Line-Card Power
For telecom line cards powered from a 48V-isolated intermediate bus converted to 12V locally, the MAX15300ETI+T produces the low-voltage rails needed by network ASICs and SerDes. According to the manufacturer datasheet, the 4.7-24V input window tolerates post-converter bus variation, and adaptive dead-time control minimizes switching losses. PMBus current/temperature telemetry enables remote health monitoring required by carrier-grade reliability targets.
موصى به
Industrial Distributed Power Modules
In industrial 24V-bus distributed power modules, the MAX15300ETI+T regulates local point-of-load rails for sensors, MCU/MPU subsystems, and analog signal chains. According to the manufacturer datasheet, the 24V input ceiling handles nominal industrial 24V rails, and the Auto-Comp PID adapts automatically as output capacitance scales with module I/O count. The 5x5 mm TQFN-EP footprint fits compact DIN-rail or PCB-mounted modules where small PCB area matters.
موصى به
Base Station / RF Subsystem Power
Base-station RF chains need low-noise, fast-transient rails for ADC/DAC, transceivers, and clocking ICs. According to the manufacturer datasheet, the MAX15300ETI+T's digital control loop achieves tight regulation under load steps, and pre-bias startup allows it to be inserted into hot-swap or sequencing architectures common in macro-base-station designs. PMBus-driven margining supports production calibration of RF power rails.
موصى به
Test & Measurement Instrumentation
ATE and bench-top test equipment demands precisely regulated low-voltage rails with digital telemetry for automated test routines. According to the manufacturer datasheet, the MAX15300ETI+T supports PMBus-driven output margining used in production ATE to validate load regulation, and its digital telemetry streamlines instrument-level fault diagnostics. The Auto-Comp PID adapts when DUT cards with different bulk-capacitance profiles are swapped in the test fixture.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MAX15300ETI+T — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MAX15301ETI+T | MAX15302ETI+T | MAX15300ETI+T-T | MAX15300AETI+T | LTC3811EUFD#PBF |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Analog Devices |
| Package | TQFN-28-EP (5x5 mm) | TQFN-28-EP (5x5 mm) - same | TQFN-28-EP (5x5 mm) - same | TQFN-28-EP (5x5 mm) - same | TQFN-28-EP (5x5 mm) - same | TQFN-28-EP (5x5 mm) - same |
| Digital Interface | PMBus 1.2/1.3 | PMBus 1.2/1.3 | PMBus 1.2/1.3 | PMBus 1.2/1.3 | PMBus 1.2/1.3 | No PMBus (analog) |
| Auto-Compensation | Yes (digital PID) | Yes | Yes | Yes | Yes | No (analog) |
| Pre-Bias Startup | Yes (monotonic) | Yes | Yes | Yes | Yes | Yes |
أبرز الفروقات
- Auto-Compensation eliminates manual PID tuning (مقابلLTC3811EUFD#PBF)
- Single-package family upgrade path (مقابلMAX15301ETI+T)
- Integrated PMBus telemetry reduces external components (مقابلMAX15302ETI+T)
ملاحظات التصميم
Place the bootstrap capacitor (CBST) as close as possible to the BST and LX pins of the MAX15300ETI+T, and use a wide LX copper pour to minimize parasitic inductance. According to manufacturer layout guidance, the power ground (PGND) and analog ground (AGND) returns should join only at the exposed pad (EP) beneath the IC, with PGND routing directly under the low-side MOSFET. Decouple VDD and PVCC with 1uF X7R ceramics placed within 1mm of the relevant pins. Without these layout practices the regulator may exhibit switching jitter and elevated output ripple.
Estimated: at 600 kHz, 12V input, 1.0V/30A output, the MAX15300ETI+T dissipates roughly 0.5-1W in the controller IC itself; most losses are in the external MOSFETs. The TQFN-EP exposed pad must be soldered to a copper area of at least 1 sq inch with thermal vias for theta_JA to stay within datasheet limits. Without adequate PCB copper, the controller may trigger internal thermal shutdown before MOSFETs reach their rated current. Designers should follow the manufacturer's thermal-via count guideline.
Do not connect PMBus pull-ups to voltages above 3.6V; the MAX15300ETI+T SDA/SCL/ADDR pins are not 5V-tolerant per the manufacturer datasheet. Setting the PMBus address resistor to an unsupported value will default to address 0x30 and may collide on a multi-device bus. For pre-bias monotonic startup to function, the output must be sensed through the VSENSE pin, not the VOUT monitor pin; using VOUT directly disables pre-bias detection. Avoid routing the CSN/CSP differential pair through vias to minimize current-sense error.
معلومات الامتثال
RoHS3 compliant and lead-free per distributor listings (ics-embedded, components-house). AEC-Q100 is not applicable since the MAX15300ETI+T targets commercial/industrial server and telecom applications, not automotive. Halogen-free status not stated in the verified data; set to unknown rather than assumed.
