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參數(shù)資料
| 型號(hào)： | SMM105NNR05 |
| 廠商： | Summit Microelectronics, Inc. |
| 英文描述： | Single-Channel Supply Voltage Marginer and Active DC Output Controller |
| 中文描述： | 單通道供電電壓Marginer和有源直流輸出控制器 |
| 文件頁數(shù)： | 1/21頁 |
| 文件大小： | 384K |
| 代理商： | SMM105NNR05 |
SMM105
Single-Channel Supply Voltage Marginer and Active DC Output Controller
Preliminary Information
1
(See Last Page)
SUMMIT
Microelectronics, Inc. 2005
1717 Fox Drive San Jose CA 95131 Phone 408 436-9890 FAX 408 436-9897
www.summitmicro.com
2068 1.8 09/20/05
1
FEATURES & APPLICATIONS
Extremely accurate (±0.1%) Active
DC Output Control (ADOC
TM
)
ADOC Automatically adjusts supply output
voltage level under all DC load conditions
Capable of margining supplies with trim inputs
using either positive or negative trim pin control
Wide Margin/ADOC range from 0.3V to VDD
Uses either an internal or external VREF
Operates from any intermediate bus supply
from 8V to 15V and from 2.7V to 5.5V
Programmable START and READY pins
Two programmable general purpose monitor
sensors – UV and OV with FAULT Output Flag
General Purpose 1k EEPROM with Write Protect
I
C 2-wire serial bus for programming
configuration and monitoring status.
28 pad QFN or 25 ball
Ultra
CSP
(Chip-Scale)
package
Applications
In-system test and control of Point-of-Load
(POL) Power Supplies for Multi-voltage
Processors, DSPs and ASICs
Enterprise and edge routers, servers, Storage
Area Networks
INTRODUCTION
The SMM105 actively controls the output voltage level
of a DC/DC converter that uses a Trim or VADJ/FB pin
to adjust the output. An Active DC Output Control
(ADOC
TM
) feature is used during normal operation to
maintain extremely accurate settings of supply
voltages and, during system test, to control margining
of the supplies using I
C commands. Total accuracy
with a ±0.1% external reference is ±0.2%, and ±0.5%
using the internal reference. The device can margin
supplies with either positive or negative trim pin control
within a range of 0.3V to VDD. The SMM105 supply
can be from 12V, 8V, 5V or 3.3V to as low as 2.7V to
accommodate any intermediate bus supply.
The voltage settings (margin high/low and nominal)
are programmed into nonvolatile memory through the
industry standard I
2
C 2-wire data bus. The I
2
C bus is
also used to enable margin high, margin low, ADOC or
normal operation. When margining, the SMM105 will
check the voltage output of the converter and make
adjustments to the trim pin via a feedback loop to bring
the voltage to the margin setting. A margining status
register is set to indicate that the system is ready for
test. The SMM105 ADOC will continue to monitor and
adjust the channel output at the specified level.
SIMPLIFIED APPLICATIONS DRAWING
12VIN (6V to 15V)
VIN
TRIM
V+
V-
VM
FILT_CAP
TRIM_CAP
SMM105
uP/
DSP/
FPGA/
ASIC
Internal or
External
Voltage
Reference
VREF_CNTL
GND
1.2 VIN
SDA
SCL
A2
I
2
C
BUS
3.3/5Vin (2.7V to 5.5V)
R
READY
V
1
VDD_CAP
S
POWER GOOD
A1
A0
WP#
FAULT#
FAULT#
COMP1
COMP2
DC/DC
Converter
TRIM
ON/OFF
UV
OV
GND
Figure 1 – Applications Schematic using the SMM105 Controller to actively control the DC output level
(ADOC) of a DC/DC Converter as well as margin control. The SMM105 can operate over a wide supply range
Note: This is an applications example only. Some pins, components and values are not shown.
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