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SY8113B

Silergy
Part Number SY8113B
Manufacturer Silergy
Description Synchronous Step Down Regulator
Published Oct 29, 2015
Detailed Description Application Note: SY8113B High Efficiency, 500kHz, 3A, 18V Input Synchronous Step Down Regulator General Description T...
Datasheet PDF File SY8113B PDF File

SY8113B
SY8113B

Overview
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, (Device code: WC, x=year code, y=week code, z= lot number code) Pin Name BS GND FB EN IN LX Pin Number 1 2 3 4 5 6 Pin Description Boot-Strap Pin.
Supply high side gate driver.
Decouple this pin to LX pin with 0.
1uF ceramic cap.
Ground pin Output Feedback Pin.
Connect this pin to the center point of the output resistor divider (as shown in Figure 1) to program the output voltage: Vout=0.
6*(1+R1/R2) Enable control.
Pull high to turn on.
Do not float.
Input pin.
Decouple this pin to GND pin wit...


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