MIC28510

The Micrel MIC28510 is an adjustable frequency, synchronous buck regulator featuring unique adaptive on–time control architecture. The MIC28510 operates over an input supply range of 4.5V to 75V and provides a regulated output of up to 4A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%.

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 MIC28510 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.

Features
  • Hyper Speed Control™ architecture enables
  • High delta V operation (VIN = 75V and VOUT = 0.8V)
  • Small output capacitance
  • 4.5V to 75V voltage input
  • 4A output current capability, up to 95% efficiency
  • Adjustable output voltage form 0.8V to 24V
  • ≤1% FB accuracy
  • Any Capacitor™ stable
  • Zero-ESR to high–ESR output capacitors
  • 100kHz to 500kHz switching frequency
  • Internal compensation
  • Foldback current limit and "hiccup" mode short-circuit protection
  • Thermal shutdown
  • Supports safe startup into a pre-biased load
  • -40°C to +125°C junction temperature range
  • 28-pin 5mm x 6mm MLF® 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) 75 75
Output Voltage Range Min (V) 0.8 0.8
Output Voltage Range Max (V) 5.5 5.5
Output Current (A) max 4 4
Quiescent Current (mA) typ 1.4 1.4
Synchronous Rectifier Yes Yes
Operating Temp Range -40 to 125 -40 to 125
Vfb (V) 0.8 0.8
Duty Cycle Max (%) 0.8 0.8
SHUTDOWN Current (µA) (Typ) 700 700
Documents
MIC28510 - 75V/4A Hyper Speed Control? Synchronous DC/DC Buck RegulatorData Sheets11/05/20151135KB
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
MIC28510 Evaluation BoardUser Guides11/11/2015363KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC28510HYJL-TR28VQFN-40C to +125CT/R**********
MIC28510YJL-TR28VQFN-40C to +125CT/R2.592.161.961.901.88
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC28510YJL-TR0.0816000.22718028VQFN5x6x0.9mmNiPdAue4
MIC28510HYJL-TR0.0816000.22718028VQFN5x6x0.9mmNiPdAue4
MIC28510 - 75V/4A Hyper Speed Control? Synchronous DC/DC Buck Regulator MIC28510
Micrel AN 39 MIC261203
Micrel ANLPS300 MIC24053
MIC28510 Evaluation Board MIC28510
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