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SMB214A 데이터시트 PDF




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부품번호 SMB214A 기능
기능 Three-channel Programmable DC-DC System Power Managers
제조업체 Summit Microelectronics
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SMB214A 데이터시트, 핀배열, 회로
SMB214A/B/C
Preliminary Information
High-power, Three-channel Programmable DC-DC System Power Managers
FEATURES & APPLICATIONS
INTRODUCTION
Digital programming of all major parameters via
I2C interface and non-volatile memory
Output voltage set point
Input/battery voltage monitoring
Output power-up/down sequencing
Dynamic voltage control of all outputs
UV/OV monitoring of all outputs
Enable/Disable outputs independently
User friendly Graphical User Interface (GUI)
Three synchronous step-down output channels
Integrated RESET monitor
+2.7V to +6.0V Input Range
Highly accurate output voltage: <2.5%
Factory programmable dead times
0% to 100% Duty Cycle operation
Undervoltage Lockout (UVLO) with hysteresis
Operating frequency: 400kHz (SMB214A), 800kHz
(SMB214B), 1MHz (SMB214C)
Applications
Car & Marine Navigation Systems
Set-top Boxes
TVs
DDR Memory
Mobile Computing/PDAs
Office Equipment
DMB Systems
www.DataSheet4U.com
SIMPLIFIED APPLICATIONS DRAWING
The SMB214A/B/C are highly integrated and flexible three-
channel power managers designed for use in a wide range of
applications. The built-in digital programmability allows system
designers to custom tailor the device to suit almost any multi-
channel power supply application from digital camcorders to
set-top boxes. Complete with a user friendly GUI, all
programmable settings, including output voltages and
input/output voltage monitoring, can be customized with ease.
The SMB214A/B/C integrate all the essential blocks required to
implement a complete three-channel power subsystem
consisting of three synchronous step-down “buck” controllers.
Additionally sophisticated power control/monitoring functions
required by complex systems are built-in. These include
digitally programmable output voltage set point, power-
up/down sequencing, enable/disable, dynamic voltage
management and UV/OV monitoring on all channels.
The integration of features and built-in flexibility of the
SMB214A/B/C allows the system designer to create a “platform
solution” that can be easily modified via software without major
hardware changes. Combined with the re-programmability of
the SMB214A/B/C, this facilitates rapid design cycles and
proliferation from a base design to future product generations.
The SMB214A/B/C are suited to a wide variety of applications
with an input range of +2.7V to +6.0V. Higher input voltage
operation can easily be implemented with a small number of
external components. Output voltages are extremely accurate
(<2.5%). Communication is accomplished via the industry
standard I2C bus. All user-programmed settings are stored in
non-volatile EEPROM. The devices are offered in both the
commercial and the industrial operating temperature range.
The package type is a lead-free, RoHS compliant, 5x5 QFN-
32.
+2.7V to +6.0V
or
Li-Ion
SMB214
I2C/SMBus
Enable Input
RESET Output
(Power Good)
System
Control
and
Monitoring
RESET
Monitor
3 Step-
Down
(Buck)
Channels
+0.5V to Vin (Prog.) @ 5A
CPU Core
+0.5V to Vin (Prog.) @ 5A
Memory, I/O
+0.5V to Vin (Prog.) @ 5A
Analog/RF
Figure 1 – Applications schematic featuring the SMB214A/B/C programmable DC-DC controllers.
Note: This is an applications example only. Some pins, components and values are not shown.
© SUMMIT Microelectronics, Inc. 2007
757 N. Mary Avenue • Sunnyvale CA 94085
http://www.summitmicro.com/
2128 2.0 6/20/2008
Phone 408 523-1000 • FAX 408 523-1266
1




SMB214A pdf, 반도체, 판매, 대치품
INTERNAL BLOCK DIAGRAM
COMP2_CH[0,1,2]
VM_CH[0,1,2]
100k
I2C/SMBUS
SDA
SCL
COMP1_CH[0,1,2]
VREF
DIGITAL TO
VDDCAPCOANNVAELROTGER
VBATT
z
z
+ OA
z
CLAMP
zz
LEVEL
SHIFTER
VREF
+
+
BANDGAP VREF
VDD_CAP
2.5V
REGULATOR
z z + UV2
z
zD Q
LEVEL
SHIFTER
VREF
+ UV1z
SMB214A/B/C
+ DUTY
CYCLE
LIMIT
OSC
Fixed 400/800/
1000kHz
MAX LIMIT
LOW LIMIT
GLITCH
FILTER
OVER VOLTAGE
DETECTION
GLITCH
FILTER
UNDER VOLTAGE
DETECTION
Channel 0,1,2
Synchronous
buck
PWM Converter
SEQUENCING
AND
MONITORING
LOGIC
ENABLE
HVSUP[0,1,2]
HSDRV[0,1,2]
DEADTIME
LSDRV[0,1,2]
PWREN
GND
Figure 3 –SMB214A/B/C internal block diagram. Programmable functional blocks include: level shifters, digital
to analog converter and the VM_CH[0,1,2] voltage dividers.
www.DataSheet4U.com
Summit Microelectronics, Inc
2128 2.0 6/20/2008
4

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SMB214A 전자부품, 판매, 대치품
PACKAGE AND PIN DESCRIPTION
SMBTo2p1V4iAew/B/C
5mm x 5mm QFN-32
SMB214A/B/C
www.DataSheet4U.com
32 31 30 29 28 27 26 25
1 24
2 23
3 22
4 21
5 20
6 19
7 18
8 17
9 10 11 12 13 14 15 16
Summit Microelectronics, Inc
2128 2.0 6/20/2008
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