MIC33153 Datasheet PDF - MICREL



Part Number MIC33153
Description 4MHz PWM 1.2A Internal Inductor Buck Regulator
Page 17 Pages

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4MHz PWM 1.2A Internal Inductor
Buck Regulator with HyperLight Load™
and Power Good
General Description
The MIC33153 is a high-efficiency 4MHz 1.2A
synchronous buck regulator with an internal inductor,
HyperLight Load™ mode, Power Good (PG) output
indicator, and programmable soft start. HyperLight Load™
provides very high efficiency at light loads and ultra-fast
transient response which makes the MIC33153 perfectly
suited for supplying processor core voltages. An additional
benefit of this proprietary architecture is very low output
ripple voltage throughout the entire load range with the use
of small output capacitors.
The MIC33153 is designed so that only two external
capacitors as small as 2.2µF are needed for stability. This
gives the MIC33153 the ease of use of an LDO with the
efficiency of a HyperLight Load™ DC converter. The
MIC33153 achieves efficiency in HyperLight LoadTM mode
as high as 85% at 1mA, with a very low quiescent current
of 22µA. At higher loads, the MIC33153 provides a
constant switching frequency up to 4MHz.
The MIC33153 is available in 14-pin 3.0mm x 3.5mm
MLF® package with an operating junction temperature
range from –40°C to +125°C.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Internal inductor
Simplifies design to two external capacitors
Input voltage: 2.7V to 5.5V
Output voltage: fixed or adjustable (0.62V to 3.6V)
Up to 1.2 A output current
Up to 93% peak efficiency
85% typical efficiency at 1mA
Power Good (PG) output
Programmable soft start
22µA typical quiescent current
4MHz PWM operation in continuous mode
Ultra-fast transient response
Low ripple output voltage
35mVpp ripple in HyperLight Loadmode
7mV output voltage ripple in full PWM mode
0.01µA shutdown current
Thermal shutdown and current limit protection
14-pin 3.0 x 3.5 x 1.1mm MLF® package
–40°C to +125°C junction temperature range
Solid State Drives (SSD)
Mobile handsets
Portable media/MP3 players
Portable navigation devices (GPS)
WiFi/WiMax/WiBro modules
Wireless LAN cards
Portable applications
Typical Application
Fixed Output Voltage
Adjustable Output Voltage
HyperLight Load is a trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademark Amkor Technology Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-01200 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2010

MIC33153 datasheet pdf
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Related : Start with MIC3315 Part Numbers by
MIC33153 4MHz PWM 1.2A Internal Inductor Buck Regulator MIC33153
MIC33153 pdf

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