Application Note: SY8113B
High Efficiency, 500kHz, 3A, 18V Input Synchronous Step Down Regulator
General Description
T...
Application Note: SY8113B
High Efficiency, 500kHz, 3A, 18V Input Synchronous Step Down
Regulator
General Description
The SY8113B is a high efficiency 500 kHz synchronous step-down DC-DC converter capable of delivering 3A current. The SY8113B operates over a wide input voltage range from 4.5V to 18V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.
Low output voltage ripple and small external inductor and capacitor sizes are achieved with 500 kHz switching frequency. It adopts the instant PWM architecture to achieve fast transient responses for high step down applications
Ordering Information
SY8113 □(□□)□ Temperature Code Package Code Optional Spec Code
Temperature Range: -40°C to 85°C
Ordering Number SY8113BADC
Package type TSOT23-6
Note --
Features
low RDS(ON) for internal switches (top/bottom): 80mΩ/40mΩ
4.5-18V input voltage range 3A output current capability 500 kHz switching frequency Instant PWM architecture to achieve fast transient
responses. Cycle-by-cycle peak current limitation Internal softstart limits the inrush current ±1.5% 0.6V reference TSOT23-6 package
Applications
Set Top Box Portable TV Access Point Router DSL Modem LCD TV
Typical Applications
Figure 1. Schematic Diagram
Figure 2. Efficiency Figure
AN_SY8113B Rev.0.1
Silergy Corp. Confidential-prepared for Internal Use Only 1
Pinout (top view)
AN_SY8113B
BS LX
GND
IN
FB EN
TSOT23-6(FC) Top Mark: WCxyz, ...