SA25903
SA25903 is 3A 2.2MHz Synchronous Step-Down Regulator manufactured by Silergy.
Description
The SA25903 is a high-efficiency 2.2MHz synchronous step-down converter that operates over an input voltage range of 2.8V to 6V, and can deliver an output current of up to 3A. It integrates very low RDS(ON) main and synchronous MOSFETs to minimize conduction loss. The 2.2MHz constant switching frequency reduces the required external inductor and capacitor values.
The SA25903 utilizes a constant frequency peak current mode control architecture to achieve stable operation across a wide range of conditions. It also provides cycleby-cycle current limit protection, output short-circuit protection, and overtemperature protection.
The SA25903 is available in a space-saving SOT583 package.
Features
- 2.8V~6V Input Voltage Range
- Up to 3A Output Current Capability
- Low RDS(ON) for Internal Switches (Top/Bottom):
65mΩ/25mΩ
- Constant Frequency Peak Current Mode Control
- 35µA Quiescent Current (Typ.)
- 2.5µA Shutdown Current (Typ.)
- ±1% 0.6V Reference Over -40°C to +150°C
- 2.2MHz Switching Frequency
- Internal Soft-Start Limits Inrush Current
- Forced PWM or PFM Operation Selectable in Light
Load
- 100% Duty Cycle Dropout Operation
- Spread Spectrum Clocking
- Power-Good Indicator
- Hiccup Mode for Short-Circuit Protection
- pact SOT583 Package
- Automotive AEC-Q100 Grade 1 Qualified
- MSL Rating: MSL1
Applications
- Automotive Infotainment and Cluster
- Advanced Driver Assistance System (ADAS)
- Automotive Display
Typical Application
VIN=2.8V to 6V
IN RPG 100k
CIN 10μFx2
ON/ OFF
MODE EN NC
LX FB GND
L 0.47μH
RTOP 51K
RBOT...
