NCP1546
1.5 A, 170 kHz, Buck
Regulator with
Synchronization Capability
The NCP1546 is a 1.5 A buck regulator IC operati...
NCP1546
1.5 A, 170 kHz, Buck
Regulator with
Synchronization Capability
The NCP1546 is a 1.5 A buck regulator IC operating at a fixed−frequency of 170 kHz. The device uses the V2t control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation for today’s high−speed logic. The NCP1546 accommodates input
voltages from 4.0 V to 40 V and contains synchronization circuitry.
The on−chip NPN transistor is capable of providing a minimum of 1.5 A of output current, and is biased by an external “boost” capacitor to ensure saturation, thus minimizing on−chip power dissipation. Protection circuitry includes thermal shutdown, cycle−by−cycle current limiting and frequency foldback.
Features
V2 Architecture Provides Ultra−Fast Transient Response, Improved
Regulation and Simplified Design
Wide Operating Range: 4 V to 40 V 2.0% Error Amp Reference
Voltage Tolerance Switch Frequency Decrease of 4:1 in Short Circuit Conditions
Reduces Short Circuit Power Dissipation
BOOST Lead Allows “Bootstrapped” Operation to Maximize
Efficiency
Sync Function for Parallel Supply Operation or Noise Minimization Shutdown Lead Provides Power−Down Option 1.0 mA Quiescent Current During Power−Down Thermal Shutdown Soft−Start These are Pb−Free Devices
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MARKING DIAGRAM
1 18
18 1
NCP1546 AWLYYWW G
G
18−LEAD DFN MN SUFFIX CASE 505
8 1
SOIC−8 D SUFFIX CASE 751
8
P1546 ALYWE
G 1
A = Assembly Location WL, L = Wa...