MIC261203

The Micrel MIC261203 is a constant-frequency, synchronous DC/DC buck regulator featuring adaptive on-time control architecture. The MIC261203 operates over a supply range of 4.5V to 28V. It has an internal linear regulator which provides a regulated 5V to power the internal control circuitry. MIC261203 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 MIC261203 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 MIC261203 includes a Power Good (PG) output to allow simple sequencing.

产品特性
  • HyperLight Load® efficiency - up to 80% at 10mA
  • Hyper Speed Control™ architecture enables
  • High delta V operation (VIN = 28V and VOUT = 0.8V)
  • Small output capacitance
  • Input voltage range: 4.5V to 28V
  • Output current up to 12A
  • Up to 95% efficiency
  • Adjustable output voltage from 0.8V to 5.5V
  • ±1% FB 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
  • 5mm x 6mm MLF® package
  • -40°C to +125°C junction temperature range
技术参数
aspxParamName aspxParamValue aspxParamValue
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) 28 28
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
文档资料
MIC261203-28V, 12A Hyper Light Load? Synchronous DC/DC Buck RegulatorData Sheets11/05/20151049KB
Micrel AN 39 - How to Power GSM/GPRS/EDGE/3G/HSPA M2M ModemsAppNote10/01/20151403KB
Micrel ANLPS300 - How to Power GSM/GPRS/EDGE/3G/HSPA M2M ModemsAppNote11/16/20151403KB
订购型号
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC261203YJL-TR28VQFN-40C to +125CT/R**********
器件无铅环保信息
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC261203-ZAYJL-TR0.0816000.22718028VQFN5x6x0.9mmNiPdAue4
MIC261203-ZYJL-TR0.0816000.22718028VQFN5x6x0.9mmNiPdAue4
MIC261203YJL-TR0.0816000.22718028VQFN5x6x0.9mmNiPdAue4
MIC261203-28V, 12A Hyper Light Load? Synchronous DC/DC Buck Regulator MIC261203
Micrel AN 39 MIC261203
Micrel ANLPS300 MIC261203
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