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LTC1751

Features: ` 5V Output Current: 100mA (VIN 3V)` 3.3V Output Current: 80mA (VIN 2.5V)`Ultralow Power: 20A Quiescent Current` Regulated Output Voltage: 3.3V ±4%, 5V ±4%, ADJ` No Inductors` Short-Circuit/Thermal Protection`VIN Range: 2V to 5.5V` 800kHz Switching Frequency` Very Low Shutdown Current: ...

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SeekIC No. : 004401879 Detail

LTC1751: Features: ` 5V Output Current: 100mA (VIN 3V)` 3.3V Output Current: 80mA (VIN 2.5V)`Ultralow Power: 20A Quiescent Current` Regulated Output Voltage: 3.3V ±4%, 5V ±4%, ADJ` No Inductors` Short-Circu...

LTC1751 Data Sheet

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Part Number:
LTC1751
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

` 5V Output Current: 100mA (VIN  3V)
` 3.3V Output Current: 80mA (VIN 2.5V)
`Ultralow Power: 20A Quiescent Current
` Regulated Output Voltage: 3.3V ±4%, 5V ±4%, ADJ
` No Inductors
` Short-Circuit/Thermal Protection
`VIN Range: 2V to 5.5V
` 800kHz Switching Frequency
` Very Low Shutdown Current: <2A
` Shutdown Disconnects Load from VIN
` PowerGood/Undervoltage Output
` Adjustable Soft-Start Time
` Available in an 8-Pin MSOP Package


Application

· Li-Ion Battery Backup Supplies
· Local 3V and 5V Conversion
·Smart Card Readers
· PCMCIA Local 5V Supplies
· White LED Backlighting


Pinout

Connection Diagram


Specifications

VIN to GND .................................................. 0.3V to 6V
PGOOD, FB, VOUT to GND ............................ 0.3V to 6V
SS, SHDN to GND .......................... 0.3V to (VIN + 0.3V)
VOUT Short-Circuit Duration .............................. Indefinite
IOUT (Note 2)......................................................... 125mA
Operating Temperature Range (Note 3) ..... 40 to 85
Storage Temperature Range ................ ....65 to 150
Lead Temperature (Soldering, 10 sec)..................... 300


Description

The LTC®1751 family are micropower charge pump DC/ DC converters that produce a regulated output voltage at up to 100mA. The input voltage range is 2V to 5.5V. Extremely low operating current (20mA typical with no load) and low external parts count (one flying capacitor and two small bypass capacitors at VIN and VOUT) make them ideally suited for small, battery-powered applications.

The LTC1751 family operate as Burst ModeTM switched capacitor voltage doublers to achieve ultralow quiescent current. They have thermal shutdown capability and can survive a continuous short circuit from VOUT to GND. The PGOOD pin on the LTC1751-3.3 and LTC1751-5 indicates when the output voltage has reached its final value and if the output has an undervoltage fault condition. The FB pin of the adjustable LTC1751 can be used to program the desired output voltage or current. An optional soft-start capacitor may be used at the SS pin to prevent excessive inrush current during start-up.

The LTC1751 family is available in an 8-pin MSOP package.





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