Datasheet Summary
SY80033/SY80033L
High Efficiency, 1MHz, 3A, 5.5V Input Synchronous Buck Converter
General Description
The SY80033x high efficiency 1MHz synchronous buck converter operates over a wide input voltage range of 2.5V to 5.5V, and can deliver an output current up to 3A. It integrates a top MOSFET and a bottom MOSFET with very low RDS(ON) to minimize conduction loss. The 1MHz pseudo-constant switching frequency enables using small external inductor and capacitor values.
The SY80033x uses constant-off time and peak current mode control strategy to achieve fast transient response, and high efficiency at light loads. It also provides cycleby-cycle current limit protection, output under voltage protection and over temperature protection.
Only the input and output capacitors, inductor, feedback resistor divider and feedforward capacitor need to be selected for the targeted application specifications.
The SY80033x is available in a pact DFN2×28 package.
Part Number Output UVP Output OVP OTP
SY80033DFD
Hic-cup
Auto-Recovery
SY80033LDFD
Latch-off
Typical Application
VIN: 2.5 ~ 5.5V
RPG
PG
L
IN
LX
CIN
ON/ OFF
EN
FB
GND
VOUT
RH
CFF
COUT
RL...