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MIC33050 Dataheets PDF



Part Number MIC33050
Manufacturers Micrel Semiconductor
Logo Micrel Semiconductor
Description 4MHz Internal Inductor PWM Buck Regulator
Datasheet MIC33050 DatasheetMIC33050 Datasheet (PDF)

MIC33050 4MHz Internal Inductor PWM Buck Regulator with HyperLight Load® General Description Features The Micrel MIC33050 is a high-efficiency 600mA PWM synchronous buck (step-down) regulator with internal inductor featuring HyperLight Load, a patent-pending switching scheme that offers best-in-class light load efficiency and transient performance while providing very small external components and low output ripple at all loads. The MIC33050 also has a very-low typical quiescent current of 20.

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MIC33050 4MHz Internal Inductor PWM Buck Regulator with HyperLight Load® General Description Features The Micrel MIC33050 is a high-efficiency 600mA PWM synchronous buck (step-down) regulator with internal inductor featuring HyperLight Load, a patent-pending switching scheme that offers best-in-class light load efficiency and transient performance while providing very small external components and low output ripple at all loads. The MIC33050 also has a very-low typical quiescent current of 20µA and can achieve over 85% efficiency even at 1mA. In contrast to traditional light load schemes, the HyperLight Load architecture does not trade off control speed to obtain low standby currents and in doing so, the device only needs a small output capacitor to absorb the load transient as the powered device goes from light load to full load. At higher loads, the MIC33050 provides a constant switching frequency of greater than 4MHz while providing peak efficiencies greater than 93%. The MIC33050 is available in fixed and adjustable output voltages and comes in a 12-pin 3mm x 3mm MLF® with a junction operating range of –40C to +125C. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com.  Input voltage: 2.7V to 5.5V  600mA output current  Fixed and adjustable output voltage options  No external inductor required  Ultra-fast transient response  20µA quiescent current  4MHz switching in PWM mode  Low output voltage ripple  >93% peak efficiency  >85% efficiency at 1mA  Micropower shutdown  12-pin 3mm x 3mm MLF®  –40C to +125C junction temperature range Applications  Cellular phones  Digital cameras  Portable media players  Wireless LAN cards  WiFi, WiMax, and WiBro modules  USB-powered devices ____________________________________________________________________________________________________________ Typical Application HyperLight Load is a registered trademark of Micrel, Inc. MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com May 2012 M9999-050312-C Micrel, Inc. Ordering Information Part Number MIC33050-CYHL MIC33050-4YHL MIC33050-GYHL MIC33050-SYHL MIC33050-AYHL Voltage 1.0V 1.2V 1.8V 3.3V ADJ Temperature Range –40° to +125°C –40° to +125°C –40° to +125°C –40° to +125°C –40° to +125°C Package 12-Pin 3mm x 3mm MLF® 12-Pin 3mm x 3mm MLF® 12-Pin 3mm x 3mm MLF® 12-Pin 3mm x 3mm MLF® 12-Pin 3mm x 3mm MLF® Notes: 1. Other output voltage options available. Please contact Micrel for details. 2. MLF® is a green RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. Pin Configuration MIC33050 Lead Finish Pb-Free Pb-Free Pb-Free Pb-Free Pb-Free 12-Pin 3mm x 3mm MLF® (HL) Fixed Output Top View 12-Pin 3mm x 3mm MLF® (HL) Adjustable Output Top View Pin Description Pin Number (Fixed) 1 2 3, 4, 5, 6 7, 8 9 Pin Number (Adj) 1 2 3, 4, 5, 6 7, 8 9 10 10 11 – – 11 12 12 EP EP Pin Name VIN PGND SW OUT EN SNS CFF FB AGND ePad Pin Function Supply Voltage (Input): Requires bypass capacitor-to-GND. Power Ground. Switch (Output): Internal power MOSFET output switches. Output after the internal inductor. Enable (Input): Logic low will shut down the device, reducing the quiescent current to less than 4µA. Do not leave floating. Input to the error amplifier. Connect to the external resistor divider network to see the output voltage. For fixed output voltages connect VOUT (internal resistor network sets the output voltage). Feed forward capacitor connected to out sense pin. Feedback voltage. Connect a resistor divider from output to ground to set the output voltage. Analog ground. Exposed Heatsink Pad. Connect to power ground for best thermal performance. May 2012 2 M9999-050312-C Micrel, Inc. MIC33050 Absolute Maximum Ratings(1) Supply Voltage (VIN) .........................................................6V Output Switch Voltage (VSW) ............................................6V Output Switch Current (ISW)..............................................2A Logic Input Voltage (VEN) .................................. –0.3V to VIN ESStoDraRgeatTinegm(3p)..e..r.a..t.u..r.e...R...a..n..g..e...(.T..s.)..............................–..6. 5E°SCDtoS+en1s5i0ti°vCe Operating Ratings(2) Supply Voltage (VIN)......................................... 2.7V to 5.5V Logic Input Voltage (VEN)…………………………-0.3V to VIN Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C Thermal Resistance 3mm x 3mm MLF®-12 (JA)................................60°C/W Electrical Characteristics(4) TA = 25°C with VIN = VEN = 3.6V; CFF = 560pF; COUT = 4.7µF; IOUT = 20mA unless otherwise specified. Bold values indicate –40°C< TJ < +125°C. Parameter Supply Voltage Range Undervoltage Lockout Threshold UVLO Hysteresis Quiescent Current, Hyper LL mode Shutdown Current Output Voltage Accuracy Current Limit in PWM Mo.


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