LTC1143CS
High efficiency dual SO-16Step step-down regulator controller
peculiarity
- LTC1143 Dual Output, LTC1143L: 3.3V, 5V LTC1143L - ADJ: Adjustable Dual
- Extremely high efficiency: more than 95% possible
- Current mode operation with excellent line and load transient response
- Thirty years of output current maintained high efficiency
- Low standby current at light load: 160μA/Output
- Logic Control Shutdown (LTC1143, LTC1143L)
- Wide VINRange: 3.5V to 16V (LTC1143L, LTC1143L - ADJ)
- Very low dropout operation: 100% duty cycle
- Narrow to mid-body 16-pin SO package
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description
The LTC ® 1143 Series is a dual, step-down switching regulator controller with automatic burst mode ™ operation to maintain high efficiency at low output currents. The device consists of two independent regulator modules, each driving an external power MOSFET at switching frequencies up to 400kHz, using a constant-off-time current-mode architecture. Fixed and adjustable voltages are available.
The current operating two regulators is user-programmable, with an external current sense resistor. The wide input voltage range allows operation from 4V to 14V (16V max). LTC1143L and LTC1143L - ADJ extends operation to VIN= 3.5V。 The 100% duty cycle provides low dropout regulation, external MOSFETs and inductors, and current sense resistorstargetResistiveR DS（ON），can only be limited by a limited number of .
The LTC1143 series is ideal for dual output voltage applications that require high conversion efficiency over a wide load current range with little board space.