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SY8022/SY8022L
High Efficiency 1 MHz, Dual 2.5A/2A Synchronous Step Down Regulator
Preliminary Spec
General Description
The SY8022 and SY8022L are high-efficiency 1MHz synchronous step-down DC-DC regulator ICs capable of delivering up to 2.5A output currents. The SY8022 operates 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 1MHz switching frequency.
Applications
• Access Point Router • Net PC • LCD TV • Set Top Box
Features
• low Rds(on) for internal switches (top/bottom): SY8022: 150/100mohm, 2.5A SY8022L: 180/120mohm, 2A
• 3-5.5V input voltage range • 1MHz switching frequency minimizes the external
components • Internal softstart limits the inrush current • 100% dropout operation • Compact and thermally enhanced package: SO8E
Ordering Information
SY8022□(□□)□ Temerature Code C: 0°C~85°C Package Code: FC: SO8E
Spec Code
Typical Applications
Figure 1
Figure 2 Efficiencyvs Load Current
SY8022Rev. # 0.5
Silergy Corp. Confidential- Prepared for Customers Use Only
1
SY8022/8022L
Pinout (top view)
IN1 1 LX1 2 IN2 3 LX2 4
8 FB1 7 EN1 6 FB2 5 EN2
Pin Name EN1,2 GND LX1,2 IN1,2 FB1,2
Pin Number
7,5 9 (exposed paddle) 2,4 1,3 8,6
GND
Pin Description
Enable control. Pull high to turn on. Do not float. Ground pin. The paddle must be soldered to the ground plane on the PCB. Inductor pin. Connect this pin to the switching node of inductor. Input pin. Decouple this pin to GND paddle with at least 10uF ceramic cap. 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).
Absolute Maximum Ratings (Note 1)
Supply Input Voltage ---------------------------------------------------------------------------------------- 6V Enable, FB Voltage------------------------------------------------------------------------------------------- VIN + 0.6V Power Dissipation, PD @ TA = 25°C SO8E --------------------------------------------------------------- 1W Package Thermal Resistance (Note 2)
SO8E, θ JA ------------------------------------------------------------------------------------------ 50°C/W SO8E, θ JC ------------------------------------------------------------------------------------------ 10°C/W
Junction Temperature Range ------------------------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------- 260°C
Storage Temperature Range -------------------------------------------------------------------------------- -65°C to 150°C
ESD Susceptibility (Note 2) HBM (Human Body Mode) --------------------------------------------------------------------------------- 2kV MM (Machine Mode) ----------------------------------------------------------------------.