SY20019
SY20019 is 5.5V Input Synchronous Step-Down Regulator manufactured by Silergy.
Description
Features
The SY20019 high-efficiency 1.5MHz synchronous
- 2.5V to 5.5V Input Voltage Range step-down DC/DC regulator operates over a wide
- Up to 1A Output Current input voltage range of 2.5V to 5.5V, and can deliver
- 55μA Low Quiescent Current an output current up to 1A. It integrates a main switch
- Low RDS(ON) for Internal Switches: 170mΩ and a synchronous switch with very low RDS(ON) to
Top, 100mΩ Bottom minimize conduction loss. The 1.5MHz
- 1.5MHz Switching Frequency Minimizes pseudoconstant switching frequency allows for small
Required External ponents external inductor and capacitor values.
- Internal Soft-Start Limits Inrush Current
- 100% Dropout Operation
The SY20019 uses constant-off-time and peakcurrent-mode control to achieve fast transient responses. It provides overcurrent and short-circuit protection.
- Power-Good Indicator
- Hiccup Mode for Short-Circuit Protection
- Output Auto-Discharge Function
- Ro HS-pliant and Halogen-Free
The SY20019 is available in a space-saving, low-
- pact Package: SOT563 profile SOT563 package.
Applications
- Set-Top Boxes
- USB Dongles
- Media Players
- Smartphones
Typical Application
VIN: 2.5-5.5V
ON/ OFF
EN GND
L1 RH RL
VOUT
Cff
COUT
Figure 1. Schematic Diagram
Efficiency...
