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SMB113A 데이터시트 PDF




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부품번호 SMB113A 기능
기능 Four-channel Programmable DC-DC System Power Managers
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SMB113A 데이터시트, 핀배열, 회로
SMB113A/B/SMB117/A
Preliminary Information
High-power, Four-channel Programmable DC-DC System Power Managers
FEATURES & APPLICATIONS
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
Digital soft-start and output slew rate
Dynamic voltage control of all outputs
UV/OV monitoring of all outputs
Enable/Disable outputs independently
User friendly Graphical User Interface (GUI)
Four synchronous step-down output channels
Integrated RESET monitor
+2.7V to +6.0V Input Range
Highly accurate output voltage: <1.5%
Factory programmable dead times
0% to 100% Duty Cycle operation
Undervoltage Lockout (UVLO) with hysteresis
250kHz (SMB117A), 400kHz (SMB117), 800kHz
(SMB113A), 1MHz (SMB113B) operating frequency
96 bytes of user configurable nonvolatile memory
Applications
Car & Marine Navigation Systems
Set-top Boxes
TVs
DDR Memory
Mobile Computing/PDAs
Office Equipment
DMB Systems
SIMPLIFIED APPLICATIONS DRAWING
INTRODUCTION
The SMB113A/B and SMB117/A are highly integrated and
flexible four-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 SMB113A/B and SMB117/A integrate all the essential
blocks required to implement a complete four-channel power
subsystem consisting of four 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
SMB113A/B and SMB117/A 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 SMB113A/B and SMB117/A, this
facilitates rapid design cycles and proliferation from a base
design to future product generations.
The SMB113A/B and SMB117/A 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 (<1.5%). Communication is accomplished
via the industry standard I2C bus. All user-programmed
settings are stored in non-volatile EEPROM of which 96 bytes
may be used as general-purpose memory. 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
I2C/SMBus
Enable Input
Reset Input
RESET Output
(Power Good)
SMB113A/B
System
Control
and
Monitoring
4 Step-
Down
(Buck)
Channels
RESET
Monitor
+0.5V to Vin (Prog.) @ 1.5A/5A
CPU Core
+0.5V to Vin (Prog.) @ 1.5A/5A Memory, I/O
+0.5V to Vin (Prog.) @ 1.5A/5A
DSP/Codec
+0.5V to Vin (Prog.) @ 1.5A/5A
Analog/RF
+2.7V to +6.0V
or
Li-Ion
I2C/SMBus
Enable Input
Reset Input
RESET Output
(Power Good)
SMB117/A
System
Control
and
Monitoring
4 Step-
Down
(Buck)
Channels
RESET
Monitor
+0.5V to Vin (Prog.) @ 5A/10A
CPU Core
+0.5V to Vin (Prog.) @ 5A/10A
Memory, I/O
+0.5V to Vin (Prog.) @ 5A/10A
DSP/Codec
+0.5V to Vin (Prog.) @ 5A/10A
Analog/RF
Figure 1 – Applications schematic featuring the SMB113A/B/117/A 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/
2111 2.5 6/11/2010
Phone 408 523-1000 • FAX 408 523-1266
1




SMB113A pdf, 반도체, 판매, 대치품
INTERNAL BLOCK DIAGRAM
COMP2_CH[0,1,2,3]
VM_CH[0,1,2,3]
100k
I2C/SMBUS
SDA
SCL
COMP1_CH[0,1,2,3]
VREF
DIGITAL TO
ANALOG
CONVERTER
VBATT
VDDCAP
VDD_CAP
2.5V
REGULATOR
z
z
z
+ OA
z
CLAMP
zz
LEVEL
SHIFTER
VREF
+
+
BANDGAP VREF
z+
UV2
z
zD Q
LEVEL
SHIFTER
VREF
+ UV1z
SMB113A/B/SMB117/A
Preliminary Information
+ DUTY
CYCLE
LIMIT
OSC
Fixed 250/400/
800/1000kHz
MAX LIMIT
LOW LIMIT
GLITCH
FILTER
OVER VOLTAGE
DETECTION
GLITCH
FILTER
UNDER VOLTAGE
DETECTION
Channel 0,1,2,3
Synchronous buck
PWM Converter
SEQUENCING
AND
MONITORING
LOGIC
ENABLE
HVSUP[0,1,2,3]
HSDRV[0,1,2,3]
DEADTIME
LSDRV[0,1,2,3]
PWREN0
GND
Figure 3 –SMB113A/B and SMB117/A internal block diagram. Programmable functional blocks include: level
shifters, digital to analog converter and the VM_CH[0,1,2,3] voltage dividers.
Summit Microelectronics, Inc
2111 2.5 6/11/2010
4

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SMB113A 전자부품, 판매, 대치품
SMB113A/B/SMB117/A
Preliminary Information
PIN DESCRIPTION
Pin Number
29
Pin Type
IN
Pin Name
VM_CH3
Pin Description
The VM_CH3 (Channel 3 Voltage Monitor) pin connects the channel 3
step-down controller output. Internally the VM_CH3 pin connects to an
internal programmable resistor divider.
30
PWR
GND
Ground
31
32
PAD
OUT
PWR
PWR
LSDRV_CH0
HVSUP0
GND
The LSDRV_CH0 (Channel 0 Low-side Driver) pin is the lower switching
node of the channel 0 synchronous step-down buck controller. Attach to
the gate of n-channel MOSFET.
Channel 0 High Voltage Supply used to power the channel 0 buck
driver.
Exposed metal (thermal) Pad on bottom of SMB113A/B and SMB117/A.
The thermal pad of the QFN package must be connected to the PCB
GND.
Summit Microelectronics, Inc
2111 2.5 6/11/2010
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