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LTC1875

Features: ` High Efficiency: Up to 95%` Low Quiescent Current: Only 15mA with No Load` 550kHz Constant Frequency Operation` 2.65V to 6V Input Voltage Range` VOUT from 0.8V to VIN, IOUT to 1.5A` True PLL Frequency Locking from 350kHz to 750kHz` Power Good Output Voltage Monitor` Low Dropout Operati...

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SeekIC No. : 004401944 Detail

LTC1875: Features: ` High Efficiency: Up to 95%` Low Quiescent Current: Only 15mA with No Load` 550kHz Constant Frequency Operation` 2.65V to 6V Input Voltage Range` VOUT from 0.8V to VIN, IOUT to 1.5A` True...

LTC1875 Data Sheet

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Part Number:
LTC1875
Supply Ability:
5000

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

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Product Details

Description



Features:

` High Efficiency: Up to 95%
` Low Quiescent Current: Only 15mA with No Load
` 550kHz Constant Frequency Operation
` 2.65V to 6V Input Voltage Range
` VOUT from 0.8V to VIN, IOUT to 1.5A
` True PLL Frequency Locking from 350kHz to 750kHz
` Power Good Output Voltage Monitor
` Low Dropout Operation: 100% Duty Cycle
`Burst Mode® or Pulse Skipping Operation
` Current Mode Operation for Excellent Line and Load Transient Response
` Shutdown Mode Draws <1A Supply Current
`±2% Output Voltage Accuracy
` Overcurrent and Overtemperature Protected
` Available in 16-Lead SSOP Package


Application

· Portable Computers
· Portable Instruments
·Wireless Modems


Pinout

Connection Diagram


Specifications

Input Supply Voltage .................................. 0.3V to 7V
ITH, PLL_LPF Voltages ............................. 0.3V to 2.7V
RUN/SS, VFB Voltages ............................. 0.3V to VIN
SYNC/MODE Voltage ................................ 0.3V to VIN
(VPVIN VSWP) Voltage ........................... 0.3V to 7V
VSWN Voltage ............................................ 0.3V to 7V
P-Channel Switch Source Current (DC) ...................... 2A
N-Channel Switch Sink Current (DC) .......................... 2A
Peak Switching Sink and Source Current .................... 3A
Operating Ambient Temperature Range
    (Note 2) ............................................... 40  to 85
Junction Temperature (Note 3, 6) ........................... 125
Storage Temperature Range ................. 65  to 150
Lead Temperature (Soldering, 10 sec)..................... 300


Description

The LTC®1875 is a high efficiency 1.5A monolithic synchronous buck regulator using a constant frequency, current mode architecture. Operating supply current is only 15mA with no load and drops to <1A in shutdown. The input supply voltage range of 2.65V to 6V makes the LTC1875 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.

The switching frequency is internally set to 550kHz, allowing the use of small surface mount inductors and capacitors.
For noise sensitive applications, the LTC1875 can be externally synchronized from 350kHz to 750kHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low.

The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with a 0.8V feedback reference voltage. The LTC1875 is available in a 16-lead SSOP package.




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