SY8121 Datasheet | Silergy

Description SY8121 develops high efficiency synchronous stepdown DC-DC converter capable of delivering 2A load current. SY8121 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. SY8121 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 1 MHz under heavy load conditions to minimize the size of inductor and capacitor. Ordering Information - (- - )- Temperature Code Package Code Optional Spec Code Ordering Number SY8121ABC SY8121DEC Package type SOT23-6 DFN2x2-6 Note --- Features - Low RDS(ON) for internal switches (top/bottom):140/130 mΩ - 4.5-18V input voltage range - 2A load current capability - Instant PWM architecture to achieve fast transient responses - Internal softstart limits the inrush current - 2% 0.6V reference - Ro HS pliant and Halogen Free - pact package: SOT23-6/ DFN2x2-6 Applications - Set Top Box - Portable TV - Access Point Router - DSL Modem - LCD TV Typical Applications Efficiency (%) Figure 1. Schematic Diagram Figure 2. Efficiency Figure Pinout (top view) AN_SY8121 BCLLL PTLLL SOT23-6 DFN2X2-6 SOT23-6 DFN2X2-6 LLL:Date code Pin Name BS GND SOT23-6 1...