TS3410CX5RF TSC [Taiwan Semiconductor Company, Ltd], TS3410CX5RF Datasheet - Page 3

• Manufacturer Part Number: TS3410CX5RF
• Description: 1A / 1.5MHz Synchronous Buck Converter
• Manufacturer: TSC [Taiwan Semiconductor Company, Ltd]

TS3410
1A / 1.5MHz Synchronous Buck Converter
Block Diagram
Function Description
Operation
TS3410 is a monolithic switching mode Step-Down DC-DC converter. It utilizes internal MOSFETs to achieve high
efficiency and can generate very low output voltage by using internal reference at 0.6V. It operates at a fixed switching
frequency, and uses the slope compensated current mode architecture. This Step-Down DC-DC Converter supplies 1A
output current at V
= 1.8V with input voltage range from 2.5V to 6V.
OUT
Current Mode PWM Control
Slope compensated current mode PWM control provides stable switching and cycle-by-cycle current limit for excellent
load and line responses and protection of the internal main switch (P-CH MOSFET) and synchronous rectifier (N-CH
MOSFET). During normal operation, the internal P-CH MOSFET is turned on for a certain time to ramp the inductor
current at each rising edge of the internal oscillator, and switched off when the peak inductor current is above the error
voltage. The current comparator, ICOMP, limits the peak inductor current. When the main switch is off, the
synchronous rectifier will be turned on immediately and stay on until either the inductor current starts to reverse, as
indicated by the current reversal comparator, IZERO, or the beginning of the next clock cycle. The OVDET comparator
controls output transient overshoots by turning the main switch off and keeping it off until the fault is no longer present.
Idle Mode Operation
At very light loads, TS3410 automatically enters pulse skipping Mode. In the pulse skipping Mode, the inductor current
may reach zero or reverse on each pulse. The PWM control loop will automatically skip pulses to maintain output
regulation. The bottom MOSFET is turned off by the current reversal comparator, IZERO, and the switch voltage will
ring. This is discontinuous mode operation, and is normal behavior for the switching regulator.
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Version: A08