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SMB208A Fiches technique(PDF) 1 Page - Summit Microelectronics, Inc.

No de pièce SMB208A
Description  Dual Programmable Buck Regulators with Integrated MOSFETs and Digital Control
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Fabricant  SUMMIT [Summit Microelectronics, Inc.]
Site Internet  http://www.summitmicro.com
Logo SUMMIT - Summit Microelectronics, Inc.

SMB208A Fiches technique(HTML) 1 Page - Summit Microelectronics, Inc.

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SMB206A/7A/8A
Preliminary
1
(See Last Page)
SUMMIT Microelectronics, Inc. 2012 • 757 N. Mary Ave • Sunnyvale CA 94085 • Phone 408 523-1000 • FAX 408 523-1266
http://www.summitmicro.com/
2147 2.4 2/23/2012
1
Dual Programmable Buck Regulators with Integrated MOSFETs and Digital
Control
FEATURES
• Dual Step-Down DC-DC Outputs
-
Integrated power MOSFET switches
-
1A-3A output current with built in current limit
-
Input voltage range: +4.5V to +16V
-
Output voltage +0.8V to +5.0V (+/-2.5% accuracy)
-
Automatic PFM mode for light load efficiency
-
Integrated frequency compensation
• Integrated Power Control and Programmability
-
I
2C Digital or Pin Control (Enable)
-
Static and Dynamic Programmable Output Voltage
128 levels of output voltage settings
“Coarse” nominal setpoint
0.8V-1.8V and 2.3/2.5/3.0/3.3/5.0V
“Fine” Margining
+1.14% to +7.95% (vs. coarse
setting)
-
PWM frequency 500-1000kHz with 180
o interleave
-
Output enable and power up/down sequence
-
Programmable output softstart/stop
-
Output UV monitoring with PGOOD/RESET output
APPLICATIONS
• Digital LCD/Plasma TV
• Digital Set-Top Box/PVR/DVR
• Datacom/Telecom Equipment
The SMB206A/7A/8A are highly integrated and flexible dual-
output DC-DC regulators designed for use in a wide variety of
applications. High integration reduces system cost and
component
count,
while
the
built-in
non-volatile
digital
programmability cuts development time by allowing system
designers to custom tailor the device to suit almost any
application.
The SMB206A/7A/8A includes integrated high-side MOSFET
switches
for
up
to
1A-3A
continuous
output
current.
Programmable output voltages as low as +0.8V support the
latest VLSI digital cores. Minimum external components result
in a very compact solution size for space constrained
applications.
Sophisticated power control/monitoring functions required by
many systems are built-in and accessible via digital I
2C
interface. These include digitally programmable output voltage
setpoint,
power-up/down
softstart
and
sequencing,
independent
enable/disable,
output
UV
monitoring
with
PowerGood/Reset output. Additionally, fine resolution voltage
margining is provided to allow for sophisticated system
optimization.
The integration of features and built-in flexibility of the
SMB206A/7A/8A allow the system designer to create a
“platform solution” that can be easily modified without
hardware changes. The SMB206A/7A/8A are well suited to
applications with an input range of +4.5V to +16V. The
operating temperature range is -40
oC to +85oC and the
available packages are 3mm X 3mm 20-pad QFN or 6.5mm X
6.4mm TSSOP-24.
Memory
CPU/SoC
SMB206A/7A/8A
Step-Down 1
int. FET
System
Control
and
Monitoring
PGOOD/RESET Output
Enable Inputs
+4.5V to +16V
DC IN
Step-Down 0
int. FET
0.8V-VIN (Prog.)
up to 1A-3A
0.8V-VIN (Prog.)
up to 1A-3A
I2C I/F
SMB206A - 3A+3A
SMB207A - 1A+1A
SMB208A - 2A+2A
Figure 1 - SIMPLIFIED APPLICATION
FEATURES & APPLICATIONS
INTRODUCTION


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