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Part Number: MIC2185
Description: Micrel's MIC2185 is a high efficiency synchronous boost PWM control IC. With its wide input voltage range of 2.9V to
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MIC2185
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General Description
MIC2185 General Description
Micrel's MIC2185 is a high efficiency synchronous boost PWM control IC. With its wide input voltage range of 2.9V to
14V, the MIC2185 can be used to efficiently boost voltages in 1- or 2-cell Li Ion battery powered applications, as well as fixed 3.3V and 5V systems. Its powerful 5 output drivers allow the MIC2185 to supply large output currents with the selection of the proper external MOSFETs.
With it's fixed frequency PWM architecture, and easily synchronized drive, the MIC2185 is ideal for noise-sensitive telecommunications applications. The nominal 400kHz operatingfrequency of the MIC2185 can be divided by two, allowing the device to be externally synchronized to frequencies below 400kHz.
The MIC2185 also features a low current shutdown mode and a programmable undervoltage lockout. A skipped pulse mode of operation can be manually set to achieve higher efficiencies at light load conditions.
The MIC2185 is available in a 16 pin SOIC package and 16 pin QSOP package with an ambient temperature operating range from 40°C to 85°C.
MIC2185 Maximum Ratings
Supply Voltage (VINA, VINP) .........................................15V
Digital Supply Voltage (VDD) ...........................................7V
Skip Pin Voltage (VSKIP) ................................. 0.3V to 7V
Comp Pin Voltage (VCOMP) ............................. 0.3V to 3V
Feedback Pin Voltage (VFB) ............................ 0.3V to 3V
Enable Pin Voltage (VEN/UVLO) .................... 0.3V to 15V
Current Sense Voltage (VCSH) ....................... 0.3V to 1V
Sync Pin Voltage (VSYNC) ............................... 0.3V to 7V
Freq/2 Pin Voltage (VFREQ/2) ......................... 0.3V to 7V
Power Dissipation (PD)
16 lead SOP ................................. 400mW @ TA = 85°C
16 lead QSOP ................................245mW@ TA = 85°C
Ambient Storage Temp ....................... 65°C to +150°C
Digital Supply Voltage (VDD) ...........................................7V
Skip Pin Voltage (VSKIP) ................................. 0.3V to 7V
Comp Pin Voltage (VCOMP) ............................. 0.3V to 3V
Feedback Pin Voltage (VFB) ............................ 0.3V to 3V
Enable Pin Voltage (VEN/UVLO) .................... 0.3V to 15V
Current Sense Voltage (VCSH) ....................... 0.3V to 1V
Sync Pin Voltage (VSYNC) ............................... 0.3V to 7V
Freq/2 Pin Voltage (VFREQ/2) ......................... 0.3V to 7V
Power Dissipation (PD)
16 lead SOP ................................. 400mW @ TA = 85°C
16 lead QSOP ................................245mW@ TA = 85°C
Ambient Storage Temp ....................... 65°C to +150°C
MIC2185 Features
• Input voltage range: 2.9V to 14V
• 95% efficiency
• Oscillator frequency of 200kHz/400kHz
• Frequency sync to 600kHz
• 0.5A shutdown current
• Two 5 output drivers
• Front edge blanking
• PWM Current Mode Control
• Cycle-by-Cycle current limiting
• Frequency foldback protection
• Adjustable under-voltage lockout
• Precision 1.245V reference output
• 16 pin SOIC narrow body package and 16 pin QSOP package
• 95% efficiency
• Oscillator frequency of 200kHz/400kHz
• Frequency sync to 600kHz
• 0.5A shutdown current
• Two 5 output drivers
• Front edge blanking
• PWM Current Mode Control
• Cycle-by-Cycle current limiting
• Frequency foldback protection
• Adjustable under-voltage lockout
• Precision 1.245V reference output
• 16 pin SOIC narrow body package and 16 pin QSOP package
MIC2185 Typical Application
• 3.3V to 5V conversion in telecom systems
• Satellite Phones
• Cable Modems
• 1-and 2-cell Li Ion battery operated equipment
• Satellite Phones
• Cable Modems
• 1-and 2-cell Li Ion battery operated equipment
MIC2185 Connection Diagram
MIC2185
PDF/DataSheet Download
- Datasheet: MIC2185
- File Size: 145149 KB
- Manufacturer: MICREL [Micrel Semiconductor]
- Click here to Download
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