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SY8088

Silergy
Part Number SY8088
Manufacturer Silergy
Description 1A Synchronous Step Down Regulator
Published Apr 13, 2015
Detailed Description Application Notes: AN_SY8088 High Efficiency 1.5MHz, 1A Synchronous Step Down Regulator Preliminary Specification Gener...
Datasheet PDF File SY8088 PDF File

SY8088
SY8088

Overview
Application Notes: AN_SY8088 High Efficiency 1.
5MHz, 1A Synchronous Step Down Regulator Preliminary Specification General Description SY8088 is a high efficiency 1.
5MHz synchronous step down DC/DC regulator IC capable of delivering up to 1A output current.
It can operate over a wide input voltage range from 2.
5V to 5.
5V and integrate main switch and synchronous switch with very low RDS (ON) to minimize the conduction loss.
Ordering Information SY8088 □(□□)□ Temperature Code Package Code Optional Spec Code Temperature Range: -40°C to 85°C Ordering Number Package Type Note SY8088AAC SOT23-5 1A Features • Low RDS(ON) for internal switches (top/bottom) 260mΩ/170mΩ • 2.
5~5.
5V input voltage range • 40µA typical quiescent current • High light load efficiency • High switching frequency 1.
5MHz minimizes the external components • Internal soft-start limits the inrush current • 100% dropout operation • RoHS Compliant and Halogen Free • Compact package: SOT23-5 Applications • Portable Navigation Device • Set Top Box • USB Dongle • Media Player • Smart phone Typical Application Figure1.
Schematic Diagram 95 90 85 80 75 70 1 Efficiency vs.
Load Current VIN=3.
3V,VOUT=1.
8V VIN=4.
2V,VOUT=1.
8V VIN=5.
0V,VOUT=1.
8V 10 100 Load Current (mA) 1000 Figure2.
Efficiency AN_SY8088 Rev.
0.
1 Silergy Corp.
Confidential- Prepared for Customer Use Only 1 Pinout (Top View) AN_SY8088 (SOT23-5) Top Mark: LDxyz (device code: LD, x=year code, y=week code, z= lot number code) Pin Name EN GND LX IN FB Pin Number 1 2 3 4 5 Pin Description Enable control.
Pull high to turn on.
Do not float.
Ground pin.
Inductor pin.
Connect this pin to the switching node of the inductor.
Input pin.
Decouple this pin to the GND pin with at least 4.
7uF ceramic capacitor.
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).
Add optional C1 (10pF~47pF) to speed up the transient response.
Absolut...


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