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LTC1266-5

Features: ·Ultrahigh Efficiency: Over 95% Possible·Drives N-Channel MOSFET for High Current or P-Channel MOSFET for Low Dropout·Pin Selectable Burst Mode Operation·1% Output Accuracy (LTC1266A)·Pin Selectable Phase of Topside Driver for Boost or Step-Down Operation·Wide VIN Range: 3.5V to 20V·On-C...

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LTC1266-5: Features: ·Ultrahigh Efficiency: Over 95% Possible·Drives N-Channel MOSFET for High Current or P-Channel MOSFET for Low Dropout·Pin Selectable Burst Mode Operation·1% Output Accuracy (LTC1266A)·Pin ...

LTC1266-5 Data Sheet

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Part Number:
LTC1266-5
Supply Ability:
5000

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

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Product Details

Description



Features:

·Ultrahigh Efficiency: Over 95% Possible
·Drives N-Channel MOSFET for High Current or P-Channel MOSFET for Low Dropout
·Pin Selectable Burst Mode Operation
·1% Output Accuracy (LTC1266A)
·Pin Selectable Phase of Topside Driver for Boost or Step-Down Operation
·Wide VIN Range: 3.5V to 20V
·On-Chip Low-Battery Detector
·High Efficiency Maintained Over Large Current Range
·Low 170mA Standby Current at Light Loads
·Current Mode Operation for Excellent Line and Load Transient Response
·Logic Controlled Micropower Shutdown: IQ < 40mA
·Short-Circuit Protection
·Synchronous Switching with Nonoverlaping Gate Drives
·Available in 16-Pin Narrow SO Package


Application

· Notebook and Palmtop Computers
· Portable Instruments
· Cellular Telephones
· DC Power Distribution Systems
· GPS Systems


Pinout

Connection Diagram


Specifications

Input Supply Voltage (Pins 2, 5) ............... 20V to 0.3V
Continuous Output Current (Pins 1, 16) ............... 50mA
Sense Voltages (Pins 8, 9) ....................... 13V to 0.3V
SHDN Voltage (Pin 11) ............................. 12V to 0.3V
PINV, BINH, LBIN (Pins 3, 4, 13)...............20V to 0.3V
LBOUT Output Current ......................................... 12mA
Operating Ambient Temperature Range ...... 0 to 70
Industrial Temperature Range ................ 40 to 85
Extended Commercial
Temperature Range ................................ 40 to 85
Junction Temperature (Note 2) ............................ 125
Storage Temperature Range ............... 65 to 150
Lead Temperature (Soldering, 10 sec).................. 300


Description

The LTC®1266 series is a family of synchronous switching regulator controllers featuring automatic Burst ModeTM operation to maintain high efficiencies at low output currents. These devices drive external power MOSFETs at switching frequencies up to 400kHz using a constant offtime current mode architecture providing constant ripple current in the inductor. They can drive either an N-channel or a P-channel topside MOSFET.

The operating current level of LTC1266-5 is user-programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V to 18V (20V maximum).  Constant off-time architecture provides low dropout regulation limited only by the RDS(ON) of the topside MOSFET (when using the P-channel) and the resistance of the inductor and current sense resistor.

The LTC1266 series combines synchronous switching for maximum efficiency at high currents with an automatic low current operating mode, called Burst Mode operation, which reduces switching losses. Standby power is reduced to only 1mW at VIN = 5V (at IOUT = 0). Load currents in Burst Mode operation are typically 0mA to 500mA.




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