MIC2130/1
High Voltage Synchronous Buck
Control IC with Low EMI Option
General Description
Features
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.
• 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
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.
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
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.
• 100% increase in current limit (MIC2131)
• Output over-voltage protection
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.
• Programmable Input UVLO
• 16-pin e-TSSOP and 16-pin 4mm x 4mm MLF®
• 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.
Applications
• Industrial/Medical DC/DC point of use power
• Printer head drivers
• Automotive Systems
• Telecom systems
• LCD/ Plasma TV
• Gaming Machines
Typical Application
Efficiency V
= 3.3V
OUT
@ +25°C
98
96
94
92
90
88
86
84
82
80
8V
12V
10V
20V
30V
40V
24V
4
5 6 7
OUTPUT CURRENT (A)
MIC2130/1 High Input Voltage Converter
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-042108-C
April 2008