(Hong Kong)
Product Summary
The LTC1143CS#TR is a dual step-down switching regulator controller featuring automatic Burst Mode operation to maintain high efficiencies at low output currents. The LTC1143CS#TR is composed of two separate regulator blocks, each driving an external power MOSFET at switching frequencies up to 400kHz using a constant off-time current mode architecture. The operating current level for both regulators is userprogrammable via an external current sense resistor. Wide input supply range allows operation from 4V to 14V (16V maximum). 100% duty cycle provides low dropout regulation limited only by the RDS(ON) of the external MOSFET and resistance of the inductor and current sense resistor. The LTC1143CS#TR is ideal for applications requiring dual output voltages with high conversion efficiencies over a wide load current range in a small amount of board space.
Parametrics
LTC1143CS#TR absolute maximum ratings: (1)Input Supply Voltage (Pins 5,13): 16V to –0.3V; (2)Continuous Output Current (Pins 4,12): 50mA; (3)Sense Voltages (Pins 1, 8, 9, 16) VIN ≥ 12.7V: 13V to –0.3V; (4)Sense Voltages (Pins 1, 8, 9, 16) VIN < 12.7V: (VIN + 0.3V) to – 0.3V; (5)Shutdown Voltage: 7V to – 0.3V; (6)Operating Temperature Range Ambient: 0℃ to 70℃; (7)Operating Temperature Range Extended Commercial: –40℃ to 85℃; (8)Junction Temperature: 125℃; (9)Storage Temperature Range: –65℃ to 150℃; (10)Lead Temperature (Soldering, 10 sec): 300℃.
Features
LTC1143CS#TR features: (1)Dual Output: 3.3V, 5V; (2)Very High Efficiency: Over 95% Possible; (3)Current Mode Operation for Excellent Line and Load Transient Response; (4)High Efficiency Maintained over Three Decades of Output Current; (5)Low Standby Current at Light Loads: 160μA/Output; (6)Logic-Controlled Shutdown; (7)Very Low Dropout Operation: 100% Duty Cycle; (8)Available in Narrow 16-Pin SO Package.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |
 LTC1143CS#TR |
|
IC REG CTRLR BUCK PWM CM 16-SOIC |
Data Sheet |
|
|
||||||
|
LTC1143CS#TRPBF |
|
IC REG CTRLR BUCK PWM CM 16-SOIC |
Data Sheet |
|
|
||||||
