AN_SY8368A 8A,16A大电流同步降压芯片.pdf

Application Notes: AN_SY8368A High Efficiency Fast Response 8A Continuous, 16A Peak, 28V Input Synchronous Step Down Regulator AN_SY8368A Rev. 0.9B Silergy Corp. Confidential- Prepared for Customer Use Only 1 General Description The SY8368A develops a high efficiency synchronous step-down DC-DC regulator capable of delivering 8A continuous, 16A peak current. The SY8368A operates over a wide input voltage range from 4.0V to 28V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. The SY8368A adopts the instant PWM architecture to achieve fast transient responses for high step down applications and high efficiency at light loads. In addition, it operates at pseudo-constant frequency of 800kHz under continuous conduction mode to minimize the size of inductor and capacitor. Ordering Information Package Code Temperature Code Optional Spec Code □(□□)□SY8368 Features ? 4.0-28V wide input voltage range ? Low RDS(ON) for internal switches: 20/10m? ? Instant PWM architecture to achieve fast transient response ? Internal 600us soft-start limits the inrush current ? Pseudo-constant frequency: 800kHz ? 8A continuous, 16A peak output current capability ? +/-1% 0.6V reference voltage ? Hiccup mode SCP, OVP ? Thermal shutdown with auto recovery Applications ? LCD-TV/Net-TV/3DTV ? Set Top Box ? Notebook ? High Power AP Typical Applications IN GND EN BS LX FB VCC COUTCFF R1 R2 L CBS VOUT VIN ON/OFF CIN PG CVCC PG (Open Drain Output) ILMTHigh/Floating/Low RFF Figure 1 Schematic Figure 2. Efficiency Ordering Number Package type Note SY8368AQQC QFN3x3-12 -- 深圳昱灿电子 专业电源管理芯片 DCDC升压 降压 LDO 锂电池充电等 联系人：李先生 AN_SY8368A AN_SY8368A Rev. 0.9B Silergy Corp. Confidential- Prepared for Customer Use Only 2 Pinout (top view) (QFN3x