MIC24052 _ BDTIC 中国领先电子元器件代理商

MIC24052

The Micrel MIC24052 is a constant-frequency, synchronous DC/DC buck regulator featuring adaptive on-time control architecture. The MIC24052 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. The MIC24052 operates at a constant 600kHz switching frequency in continuous-conduction mode and can be used to provide up to 6A 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 MIC24052 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include under voltage 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 MIC24052 includes a power good (PG) output to allow simple sequencing.

Also see the 6A Hyper Speed Control™ part, MIC24051.

产品特性

HyperLight Load® efficiency &em; up to 80% at 10mA
Hyper Speed Control™ architecture enables
High delta V operation (VIN = 19V and VOUT = 0.8V)
Small output capacitance
4.5V to 19V input voltage
Adjustable output from 0.8V to 5.5V (±1% accuracy)
Any Capacitor™ stable &em; Zero-to-high ESR
600kHz switching frequency
Power Good (PG) output
Foldback current limit and "hiccup" mode short-circuit protection
Supports safe start-up into a pre-biased load
-40°C to +125°C junction temperature range
Available in 28-pin 5mm X 6mm QFN package

技术参数

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 6	6
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

文档资料

MIC24052 - 12V, 6A High-Efficiency Buck Regulator	Data Sheets	11/09/2015	1337KB
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