Document
MAX20730
EVALUATION KIT AVAILABLE
Integrated, Step-Down Switching Regulator with PMBus
General Description
The MAX20730 is a fully integrated, highly efficient switching regulator with PMBus™ for applications operating from 4.5V to 16V and requiring up to 25A (max) load. This single-chip regulator provides extremely compact, highefficiency power-delivery solutions with high-precision output voltages and excellent transient response for networking, datacom, and telecom equipment.
The IC offers a broad range of programmable features through either the PMBus or a capacitor and resistor connected to a dedicated programming pin. Using this feature, the operation can be optimized for a specific application, reducing the component count and/or setting appropriate trade-offs between the regulator’s performance and system cost. Ease of programming enables using the same design for multiple applications.
The IC includes protection and telemetry features. Positive and negative cycle-by-cycle overcurrent protection and overtemperature protection ensure a rugged design. Input undervoltage lockout shuts down the device to prevent operation when the input voltage is out of specification. A status pin provides an output signal to show that the output voltage is within range and the system is regulating.
Applications
●● Communications Equipment ●● Networking Equipment ●● Servers and Storage Equipment ●● Point-of-Load Voltage Regulators ●● µP Chipsets ●● Memory VDDQ ●● I/O
DESCRIPTION
CURRENT INPUT
OUTPUT
RATING* VOLTAGE VOLTAGE
Electrical rating
25A
4.5V to 16V 0.6V to 5.5V
Thermal rating, TA = 55°C, 200LFM
25A
12V
1V
Thermal rating, TA = 85°C, 0LFM
15A
12V
1V
*For specific operating conditions, refer to the SOA curves in the Typical Operating Characteristics section.
Benefits and Features
●● High Power Density and Low Component Count • Overall Solution Size 509mm2 Including Inductor and Output Capacitors • 90.8% Peak Efficiency with VDDH = 12V and VOUT = 1V • Fast Transient Response: Supports Up to 300A/μs Load-Step Transients
●● Optimized Component Performance and Efficiency with Reduced Design-In Time • PMBus-Compliant Interface for Telemetry and Power Management • Voltage, Current, and Temperature Reporting through the Digital Bus
●● Increased Power-Supply Reliability with System and IC Self-Protection Features • Differential Remote Sense with Open-Circuit Detection • Hiccup Overcurrent Protection • Programmable Thermal Shutdown
Typical System Efficiency vs. Load Current (VDDH = 12V)
EFFICIENCY (%)
100 95 90 85 80 75 70 65 60 55 50
0
VoVutO=U5TV= 5V VoVutO=U3T.3=V 3.3V VoVutO=U1T.8=V 1.8V VoVutO=U1T.2=V 1.2V VoVutO=U1TV= 1V VoVutO=U0T.8=V 0.8V VoVutO=U0T.6=5V0.65V
5
10
15
20
25
IOUT (A)
Order Information appears at end of data sheet. PMBus is a trademark of SMIF, Inc.
19-8583; Rev 2; 4/20
MAX20730
Integrated, Step-Down Switching Regulator with PMBus
Absolute Maximum Ratings
Input Pin Voltage (VDDH) (Note 1).........................-0.3V to +18V VCC ..........................................................................-0.3V to +2V OE Pin Voltage....................................................-0.3V to +15.5V STAT, CLK, DATA, and
SMALERT Pin Voltages........................................-0.3V to +4V PGMA, PGMB, VSENSE+ and
VSENSE- Pin Voltages..........................................-0.3V to +2V
Switching Node Voltage (VX) DC...........................-0.3V to +18V Switching Node Voltage (VX) 25ns (Note 2)...........-10V to +23V (BST - VX) Pin Differential....................................-0.3V to +2.5V Junction Temperature (TJ)................................................+150°C Storage Temperature Range............................. -65°C to +150°C Peak Reflow Temperature Lead-Free.............................. +260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Operating Ratings
Input Voltage (VDDH)................................................. 4.5V to 16V Junction Temperature (TJ)................................. -40°C to +125°C
Maximum Average Input Current (IVDDH) (Note 3)..................6A Maximum Average Output Current (IOUT).............................25A Peak Output Current (IPK)......................................................50A
Package Information
Package Code
P154A6F+1
Outline Number
21-100020
Land Pattern Number
90-100021
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction to Ambient (θJA) (Still Air, No Heatsink; Note 4)
16.3°C/W
Junction to Case (θJC)
0.62°C/W
For the latest package outline information and land patter.