MIC24056 _ BDTIC a Leading Distributor in China

MIC24056

The Micrel MIC24056 is a constant-frequency, synchronous DC/DC buck regulator featuring adaptive on-time control architecture. The MIC24056 operates over a supply range of 4.5V to 19V. It has an internal linear regulator which provides a regulated 5V to power the internal control circuitry. MIC24056 operates at a constant 600kHz switching frequency in continuous-conduction mode and can be used to provide up to 12A of output current. The output voltage is adjustable down to 0.8V.

HyperLight Load^® architecture provides the same high efficiency and ultra-fast transient response as the Hyper Speed Control™ architecture under medium to heavy loads, but also maintains high efficiency under light load conditions by transitioning to variable frequency, discontinuous mode operation.

The MIC24056 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions, thermal shutdown, internal soft start to reduce the inrush current, foldback current-limit and "hiccup" mode short-circuit protection. The MIC24056 includes a power good (PG) output to allow simple sequencing. The 12A Hyper Speed Control™ part, MIC24055, is also available.

Features

HyperLight Load® efficiency - up to 80% at 10mA
Hyper Speed Control™ architecture enables
High delta V operation (VIN = 19V and VOUT = 0.8V)
Small output capacitance
Input voltage range: 4.5V to 19V
Output current up to 12A
Up to 95% efficiency
Adjustable output voltage from 0.8V to 5.5V
±1% feedback accuracy
Any Capacitor™ stable - zero-to-high ESR
600kHz switching frequency
Power Good (PG) output
Foldback current-limit and "hiccup" mode short-circuit protection
Safe start-up into pre-biased loads
-40°C to +125°C junction temperature range
Available in 28-pin 5mm — 6mm QFN package

Parameter

Parameter Name Value	Value
Regulator Type Step Down (Buck)	Step Down (Buck)
# of Outputs 1	1
Input Voltage Range Min (V) 4.5	4.5
Input Voltage Range Max (V) 19	19
Output Voltage Range Min (V) 0.8	0.8
Output Voltage Range Max (V) 5.5	5.5
Output Current (A) max 12	12
Quiescent Current (mA) typ 0.45	0.45
Switching Frequency (kHz) 600	600
Synchronous Rectifier Yes	Yes
Operating Temp Range -40 to 125	-40 to 125
Vfb (V) 0.8	0.8
Duty Cycle Max (%) 0.82	0.82
SHUTDOWN Current (µA) (Typ) 5	5
Light Load Efficiency Mode Yes	Yes

Documents

MIC24056 - 12V, 12A High-Efficiency Buck Regulator	Data Sheets	11/09/2015	1623KB
Micrel AN 105 - Troubleshooting Switching Power Supplies	AppNote	10/02/2015	177KB
Micrel AN 39 - How to Power GSM/GPRS/EDGE/3G/HSPA M2M Modems	AppNote	10/01/2015	1403KB
Micrel AN 87 - Putting Adaptive Constant-ON-Time Buck ICs and Modules to Work in Inverting Buck-Boost Converters	AppNote	10/02/2015	509KB
Micrel ANLPS207 - Putting Adaptive Constant-On-Time Buck ICs and Modules to Work in Inverting Buck-Boost Converters	AppNote	11/16/2015	509KB
Micrel ANLPS300 - How to Power GSM/GPRS/EDGE/3G/HSPA M2M Modems	AppNote	11/16/2015	1403KB