General Description
The TD6810D is a high-efficiency monolithic synchronous
buck regulator using a constant frequency, current mode
architecture. The device is available in an adjustable version.
Supply current with no load is 70μA and drops to <1uA in
shutdown. The 2.5V to 5.5V input voltage range makes the
TD6810D ideally suited for single Li-Ion battery powered
applications. 100% duty cycle provides low dropout
operation, extending battery life in portable systems.
PWM/PFM mode operation provides very low output ripple
voltage for noise sensitive applications.
Switching frequency is internally set at 2MHz, allowing the
use of small surface mount inductors and capacitors. Low
output voltages are easily supported with the 0.6V feedback
reference voltage.
TD6810D is available in SOT23-5L packages.

Features
⚫ Up to 96% peak efficiency
⚫ Up to 1A output current
⚫ 2.5V to 5.5V operating input range
⚫ Feedback voltage, VFB：0.6V±1%
⚫ Quiescent Current, IQ：70uA
⚫ PFM Mode for High Efficiency in Light Load
⚫ 2MHz switching frequency
⚫ No Schottky Diode Required
⚫ Low Dropout Operation:100% Duty Cycle
⚫ Inrush Current Limit and Soft Start
⚫ With enabling pin
⚫ With input over-voltage protection, under-voltage
protection, peak current limit, output short-circuit
protection, and over-temperature protection

Application
⚫ Set Top Box
⚫ Wireless and DSL Modems
⚫ Portable Instruments