DATASHEET
RAA210925
Pin-Configurable Dual 25A DC/DC Power Module with PMBus Interface
FN9352
Rev.1.00
May 31, 2019
The
RAA210925
is a pin-strap configurable dual 25A
step-down PMBus-compliant DC/DC power supply
module that integrates a digital PWM controller,
synchronous MOSFETs, power inductor, and passive
components. Only input and output capacitors are needed
to finish the design. Because of its thermally-enhanced
HDA packaging technology, the module can deliver up to
25A of continuous output current without the need for
airflow or additional heat sinking. The RAA210925
simplifies configuration and control of Renesas
digital
power technology
while offering an upgrade to full
PMBus configuration through the pin-compatible
ISL8274M.
Operating across an input voltage range of 4.5V to 14V, the
RAA210925 offers adjustable output voltages down to 0.6V
and achieves up to 95.5% conversion efficiencies. A unique
ChargeMode™ control architecture provides a single clock
cycle response to an output load step and can support
switching frequencies up to 1067kHz. The power module
integrates all power and most passive components and
requires only a few external components to operate. The
RAA210925 comes with a preprogrammed configuration
for operating in Pin-strap mode. Output voltage, switching
frequency, input UVLO, soft-start/stop delay and ramp
times, tracking function, and the device SMBus address can
be programmed with external pin-strap resistors. A standard
PMBus interface addresses fault management, as well as
real-time full telemetry and point-of-load monitoring. The
RAA210925 is supported by PowerNavigator™ software,
a Graphical User Interface (GUI), that can configure
modules for desired solutions.
The RAA210925 is available in a low profile, compact
18mmx23mmx7.5mm fully encapsulated, thermally
enhanced HDA package.
Features
• 25A/25A dual-channel output current
• 4.5V to 14V single rail input voltage
• Up to 95.5% efficiency
• Programmable output voltage
• 0.6V to 5V output voltage settings
• ±1.2% accuracy over line/load/temperature
• ChargeMode control loop architecture
• 296kHz to 1067kHz fixed switching frequency
operations
• No compensation required
• Fast single clock cycle transient response
• PMBus interface and/or pin-strap mode
• Programmable through PMBus
• Pin-strap mode for standard settings
• Real-time telemetry for V
IN
, V
OUT
, I
OUT
,
temperature, duty cycle, and f
SW
• Complete over/undervoltage, current, and
temperature protections with fault logging
•
PowerNavigator
supported
• Thermally enhanced 18mmx23mmx7.5mm HDA
package
Applications
• Server, telecom, storage, and datacom
• Industrial/ATE and networking equipment
• General purpose power for ASIC, FPGA, DSP, and
memory
Related Literature
For a full list of related documents, visit our website:
•
RAA210925
device page
FN9352 Rev.1.00
May 31, 2019
Page 1 of 64
RAA210925
VIN
CIN
ENABLE1
ENABLE2
10µF
10µF
VIN
VDD
EN1
EN2
VR5
VR6
VDRV
VCC
VDRV1
2x10µF
VR VR55 SGND PGND
VOUT1
VSENP1
VSENN1
VOUT2
VSENP2
VOUT1
COUT1
VOUT2
18
RAA210925
VSENN2
COUT2
23
m
m
mm
SCL
SDA
SA
PMBus
Interface
7.5mm
Note: This figure represents a typical implementation of the RAA210925. For
PMBus operation, it is recommended to tie the enable pin (EN) to SGND.
Figure 1. Application Circuit
Figure 2. Small Package for High Power Density
FN9352 Rev.1.00
May 31, 2019
Page 2 of 64
RAA210925
Contents
1.
1.1
1.2
1.3
1.4
1.5
2.
2.1
2.2
2.3
2.4
3.
3.1
3.2
3.3
3.4
4.
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
4.15
5.
5.1
5.2
5.3
5.4
5.5
5.6
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
RAA210925 Internal Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operation Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
13
14
14
Typical Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Efficiency Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Startup and Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derating Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transient Response Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
18
19
21
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
SMBus Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Soft-Start, Stop Delay, and Ramp Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Good. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switching Frequency and PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Overcurrent Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loop Compensation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMBus Module Address Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Overvoltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Prebias Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Overload Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phase Spreading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring Using SMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Snapshot Parameter Capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
22
24
26
27
27
29
29
30
31
31
32
33
34
34
Layout Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Thermal Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCB Layout Pattern Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Vias . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stencil Pattern Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reflow Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36
36
36
36
36
37
FN9352 Rev.1.00
May 31, 2019
Page 3 of 64
RAA210925
6.
6.1
6.2
7.
8.
8.1
8.2
9.
PMBus Command Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
PMBus Data Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
PMBus Use Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
PMBus Commands Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Datasheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
FN9352 Rev.1.00
May 31, 2019
Page 4 of 64
RAA210925
1. Overview
1.
1.1
Overview
Typical Application Circuit
(Note 2)
(Note 1)
(Note 3)
Notes:
1. R
1
and R
2
are not required if the PMBus host already has I
2
C pull-up resistors.
2. R
3
through R
11
can be selected according to the tables for the pin-strap resistor setting in this document.
3. V25, VR, and VR55 do not need external capacitors. V25 can be no connection.
Figure 3. RAA210925 Digital PMBus Module Dual 25A/25A Application with Pin-Strap Settings
FN9352 Rev.1.00
May 31, 2019
Page 5 of 64
消费电子
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
