MIC24051

The Micrel MIC24051 is a constant-frequency, synchronous buck regulator featuring a unique adaptive on-time control architecture. The MIC24051 operates over an input supply range of 4.5V to 19V and provides a regulated output of up to 6A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%, and the device operates at a switching frequency of 600kHz.

Micrel’s 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 adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device.

The MIC24051 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, foldback current limit, "hiccup mode" short-circuit protection and thermal shutdown. An open-drain Power Good (PG) pin is provided.

Also see the 6A HyperLight Load® part, MIC24052.

Features
  • 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
  • 6A output current capability, up to 95% efficiency
  • 600kHz switching frequency
  • No external compensation
  • 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
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 6 6
Quiescent Current (mA) typ 0.73 0.73
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
Documents
MIC24051 - 12V, 6A High-Efficiency Buck RegulatorData Sheets11/09/20151283KB
Micrel AN 105 - Troubleshooting Switching Power SuppliesAppNote10/02/2015177KB
Micrel AN 39 - How to Power GSM/GPRS/EDGE/3G/HSPA M2M ModemsAppNote10/01/20151403KB
Micrel AN 87 - Putting Adaptive Constant-ON-Time Buck ICs and Modules to Work in Inverting Buck-Boost ConvertersAppNote10/02/2015509KB
Micrel ANLPS207 - Putting Adaptive Constant-On-Time Buck ICs and Modules to Work in Inverting Buck-Boost ConvertersAppNote11/16/2015509KB
Micrel ANLPS300 - How to Power GSM/GPRS/EDGE/3G/HSPA M2M ModemsAppNote11/16/20151403KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC24051YJL-TR28VQFN-40C to +125CT/R1.321.101.000.970.96
相关开发工具
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC24051YJL-TR0.0816000.22718028VQFN5x6x0.9mmNiPdAue4
MIC24051 - 12V, 6A High-Efficiency Buck Regulator MIC24051
Micrel AN 105 MIC2194
Micrel AN 39 MIC26901
Micrel AN 87 MIC2104
Micrel ANLPS207 MIC2103
Micrel ANLPS300 MIC24053