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FAN4855

Features: • Low power PFM boost regulator• Input voltage range is from 1.6V to 4.5V• Output voltage range is from 3V to 5V• 500mA maximum load current capability• 95% efficient power conversion• 2-3 cell and single cell Li-Ion systems• Variable on-time Pul...

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SeekIC No. : 004340371 Detail

FAN4855: Features: • Low power PFM boost regulator• Input voltage range is from 1.6V to 4.5V• Output voltage range is from 3V to 5V• 500mA maximum load current capability• 95% e...

FAN4855 Data Sheet

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Part Number:
FAN4855
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/20

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Product Details

Description



Features:

• Low power PFM boost regulator
• Input voltage range is from 1.6V to 4.5V
• Output voltage range is from 3V to 5V
• 500mA maximum load current capability
• 95% efficient power conversion
• 2-3 cell and single cell Li-Ion systems
• Variable on-time Pulse Frequency Modulation (PFM)
• Internal synchronous rectifier (no need for external diode)
• Low-battery detection
• Logic controlled shutdown with true-load disconnect
• Low (80A) quiescent current
• MSOP-8 and TSSOP-8 Packages




Application

• DSCs
• PDAs
• Cell phones, smart phones
• Portable instrumentations
• 2-3 AA / AAA cells operated devices
• Single cell Li-Ion operated devices




Pinout

Connection Diagram




Specifications

Parameter Min. Max. Units
VIN,VOUTVoltages (Relative to GND) -0.3 6.5 V
tch Voltage (VLto GND) -0.3 VOUT+ 0.3 V
Voltage on any other Pin -0.3 VOUT+ 0.3 v
Peak Switch Current (Ipeak) - Internally Limited -
Output Current (IOUT) 500 mA
Continuous Power Dissipation TSSOP Package 525 mW
MSOP Package 315
Thermal Resistance (JA) TSSOP Package 124 °C/W
MSOP Package 206
Junction Temperature 150 °C
Storage Temperature Range -65 150 °C
Lead Temperature (soldering, 10s) 300 °C




Product Product status Eco Status Pricing* Package type Leads Packing method Package Drawing Package Marking Convention**
FAN4855MTCX Full Production Green $0.90 TSSOP 8 TAPE REEL Line 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code)
Line 2: 4855&C
* Fairchild 1,000 piece Budgetary Pricing
** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples

Package marking information for product FAN4855 is available. Click here for more information .





Description

The FAN4855 is a low power boost regulator designed for low voltage DC to DC conversion in 2-cell battery powered systems such as digital cameras, cell phones and PDAs. The converter starts-up at 1.3V and operates after the start at an input voltage as low as 1V. Output voltage can be adjusted by external resistors from 3.3V to 5V with a maximum load current of 0.5A. Quiescent current in shut-down mode is less than 10A, which maximizes the battery live time. The ON time changes with the input voltage to maintain the ripple current constant and to provide the highest efficiency over a wide load range-while maintaining low peak currents in the boost inductor. The combination of built-in power transistors, synchronous rectification and low supply current, make the FAN4855 ideal for portable applications. The FAN4855 is available in 8-lead MSOP and TSSOP packages.






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