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SY8009B

Silergy
Part Number SY8009B
Manufacturer Silergy
Description Synchronous Step-Down Regulator
Published Mar 19, 2014
Detailed Description SY8009A/SY8009B High Efficiency 1.5MHz/1MHz, 1.5A/2A Synchronous Step Down Regulator General Description The SY8009A and...
Datasheet PDF File SY8009B PDF File

SY8009B
SY8009B

Overview
SY8009A/SY8009B High Efficiency 1.
5MHz/1MHz, 1.
5A/2A Synchronous Step Down Regulator General Description The SY8009A and SY8009B are high-efficiency, high frequency synchronous step-down DC-DC regulator ICs capable of delivering up to 1.
5A/2A output currents.
The SY8009 family operate over a wide input voltage range from 3V to 5.
5V and integrate 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 greater than 1MHz switching frequency.
Features • Low RDS(ON) for internal switches (top/bottom) • SY8009A: 180mΩ/120mΩ, 1.
5A, SOT23-5 • SY8009B:100mΩ/80mΩ,2.
0A SOT23-6, SSOT23-6 • 3-5.
5V input voltage range • High switching frequency minimizes the external components • SY8009A: 1.
5MHz • SY8009B: 1MHz • Internal softstart limits the inrush current • 100% dropout operation • RoHS Compliant and Halogen Free • Compact package: SOT23-5, SOT23-6 and Super SOT23-6 are pin-compatible.
Other packages are available upon requests Ordering Information SY8009□(□□)□ Temperature Code Package Code Optional Spec Code Temperature Range: -40°C to 85°C Ordering Number SY8009AAAC SY8009BABC SY8009BEBC Package type SOT23-5 SOT23-6 SSOT23-6 Note① 1.
5A 2A 2A Applications • • • • • LCD TV Set Top Box Net PC Mini-Notebook PC Access Point Router Typical Applications 96 ON/ OFF VIN IN CIN GND FB R2 LX R1 C1(opt.
) COUT L VOUT 94 VOUT=1.
8V EN 92 Efficiency (%) 90 88 86 84 82 80 0 0.
4 0.
8 VIN=3.
3V VIN=4.
2V VIN=5.
5V 1.
2 1.
6 2 Figure 1.
Schematic diagram Load Current (A) Figure 2.
Efficiency vs Load Current SY8009A/B Rev1.
0 Silergy Corp.
Confidential- Prepared for Customer Use Only 1 Free Datasheet http://www.
Datasheet4U.
com SY8009A/SY8009B Pinout (top view) EN 1 GND 2 LX 3 SOT23-5(SY8009A) SOT23-6(SY8009B) 6 FB 5 NC 4 IN SSOT23-6(SY8009B) Pin Name EN GND LX IN FB Part Number Package type Top Mark① SY8009AAAC SOT23-5 ADxyz SY8009BABC SOT23-6 CUxyz SY8009BEBC SSO...


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