MIC26950

The Micrel MIC26950 is a constant-frequency, synchronous buck regulator featuring a unique digitally modified adaptive ON-time control architecture. The MIC26950 operates over an input supply range of 4.5V to 26V and provides a regulated output at up to 12A of output current. The output voltage is adjustable down to 0.8V with a typical accuracy of ±1%, and the device operates at a switching frequency of 300kHz.

Hyper Speed Control™ architecture allows for ultra-fast transient response while reducing the output capacitance and also makes (High VIN)/(Low VOUT) operation possible. This digitally modified adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device.

The MIC26950 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, internal soft-start to reduce inrush current, fold-back current limit, "hiccup" mode short-circuit protection and thermal shutdown.

产品特性
  • Hyper Speed Control™ architecture enables
  • High delta V operation (VIN = 26V and VOUT = 0.8V)
  • Small output capacitance
  • 4.5V to 26V input voltage
  • Adjustable output from 0.8V to 5.5V (±1% accuracy)
  • Any Capacitor™ Stable
  • Zero ESR to high-ESR output capacitance
  • 12A output current capability
  • 300kHz switching frequency
  • Internal compensation
  • Up to 95% efficiency
  • 6ms Internal soft-start
  • Foldback current-limit and "hiccup" mode short-circuit protection
  • Thermal shutdown
  • Supports safe start-up into a pre-biased load
  • -40°C to +125°C junction temperature range
  • 28-pin 5mm x 6mm MLF® 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) 26 26
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 1.4 1.4
Switching Frequency (kHz) 300 300
Synchronous Rectifier Yes Yes
Operating Temp Range -40 to 125 -40 to 125
Vfb (V) 0.8 0.8
Duty Cycle Max (%) 0.87 0.87
SHUTDOWN Current (µA) (Typ) 700 700
文档资料
MIC26950 - 12A Hyper Speed Control? Synchronous DC-DC Buck RegulatorData Sheets11/05/2015770KB
订购型号
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC26950YJL-TR28VQFN-40C to +125CT/R2.381.981.801.741.72
器件无铅环保信息
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC26950YJL-TR0.0816000.22718028VQFN5x6x0.9mmNiPdAue4
MIC26950 - 12A Hyper Speed Control? Synchronous DC-DC Buck Regulator MIC26950