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LTC1844

Features: Very Low Dropout:90mV at 150mA30mV at 50mA (LTC1844-3.3) Wide Input Voltage Range: 1.6V to 6.5V Low 35µA Supply Current, Even in Dropout Low Noise: 30µVRMS (10Hz to 100kHz) ±1.75% Voltage Accuracy Over Temperature,Voltage and Current Ranges Fast Transient Response 10nA Suppl...

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SeekIC No. : 004401913 Detail

LTC1844: Features: Very Low Dropout:90mV at 150mA30mV at 50mA (LTC1844-3.3) Wide Input Voltage Range: 1.6V to 6.5V Low 35µA Supply Current, Even in Dropout Low Noise: 30µVRMS (10Hz to 100kHz) ±1...

LTC1844 Data Sheet

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Part Number:
LTC1844
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:

Very Low Dropout:90mV at 150mA30mV at 50mA (LTC1844-3.3)
Wide Input Voltage Range: 1.6V to 6.5V
Low 35µA Supply Current, Even in Dropout
Low Noise: 30µVRMS (10Hz to 100kHz)
±1.75% Voltage Accuracy Over Temperature,Voltage and Current Ranges
Fast Transient Response
10nA Supply Current in Shutdown
Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 2.8V, 3.3V
Adjustable Output Voltage: 1.25V to 6V
Output Current Limit
Reverse-Battery and Reverse-Current Protection
No Protection Diodes Needed
Stable with 1µF Output Capacitor
Stable with Ceramic Capacitors
Short-Circuit and Thermal Overload Protection
Low Profile (1mm) SOT-23 Package


Application

Bluetooth/802.11 Cards
PDAs and Notebook Computers
Portable Instruments and Battery-Powered Systems
Cellular Phones


Pinout

Connection Diagram


Specifications

Supply Voltage (IN) .......................................  7V to 7V
Input Voltage
SHDN, BYP, ADJ .................................... ...... 0.3V to 7V
Output Voltage
OUT ............................................................  0.3V to 7V
OUT to IN ......................................................  7V to 7V
Output Short-Circut Duration..........................  Indefinite
Operating Junction Temperature Range.
(Notes 2, 10) ........................................40°C to 125°C
Storage Temperature Range ............... 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C


Description

The LTC®1844 Series are low noise VLDOTM(very lowdropout) linear regulators designed for low power/portableapplications. These regulators can operate from inputvoltages as low as 1.6V. Typical output noise is only30µVRMS and typical dropout for the LTC1844-3.3 is just90mV at the maximum load current of 150mA, reducing to30mV at 50mA.

The internal P-channel MOSFET pass transistor requiresno base current, allowing the device to draw only 35µAduring normal operation, independent of the dropoutvoltage and load current. The quiescent current falls to anegligible 10nA during shutdown.

Other features include high output voltage accuracy,excellent transient response, stablity with ultralow ESRceramic capacitors as small as 1µF, reverse-battery andreverse-current protection, short-circuit and thermaloverload protection and output current limiting.

The LTC1844 regulators are available in a low profile(1mm) SOT-23 (ThinSOTTM) package.




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