MIC2130 Datasheet, PDF (1/20 Pages) Micrel Semiconductor – High Voltage Synchronous Buck Control IC with Low EMI Option

MIC2130/1
High Voltage Synchronous Buck
Control IC with Low EMI Option
General Description
The MIC2130/1 is a high voltage input PWM synchronous
buck controller IC. It is a voltage mode controller with a
fast hysteretic control loop (FHyCL) employed during fast
line and load transients. The internal gate drivers are
designed to drive high current MOSFETs.
The MIC2130/1 can produce output voltages down to 0.7V
with input voltage from 8V to 40V. The MIC2130 family of
control ICs implements fixed frequency PWM control. The
active anti-shoot through drive scheme means a wide
range of external MOSFETs may be used while
maintaining optimum efficiency.
The MIC2131 is the fully functional version of the family
and implements a new feature to minimize EMI. This
function is critical for systems that need to be compliant
with EMI standards throughout the world.
The MIC2130/1 is available in small size 16-pin 4mm x
4mm MLF^® package, as well as 16-pin e-TSSOP at a
junction temperature range of –40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• 8V to 40V input voltage range
• Adjustable output voltages down to 0.7V
• LOW EMI option MIC2131
• Fixed 150kHz and 400kHz frequency options
• Excellent line and load regulation due to fast hysteretic
control loop during transients
• Adaptive gate drive allows efficiencies over 95%
• Programmable current limit with no sense resistor
• Senses low-side MOSFET current
• Internal drivers allow 15A output current
• Power Good output allow simple sequencing
• Programmable soft-start pin
• 100% increase in current limit (MIC2131)
• Output over-voltage protection
• Programmable Input UVLO
• 16-pin e-TSSOP and 16-pin 4mm x 4mm MLF^®
• Junction temperature range of –40°C to +125°C
Applications
• Industrial/Medical DC/DC point of use power
• Printer head drivers
• Automotive Systems
• Telecom systems
• LCD/ Plasma TV
• Gaming Machines
Typical Application
MIC2130/1 High Input Voltage Converter
Efficiency V_OUT = 3.3V
@ +25°C
98
96 ^12V
8V
94
92
20V
10V
90
88
86
30V
24V
84
82
40V
80
4567
OUTPUT CURRENT (A)
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
April 2008
M9999-042108-C