TMI3253.pdf• 70mΩ/35mΩ Low RDS(ON) internal FETs
• High Efficiency Synchronous-Mode Operation
• Wide Input Range:4.5V to 18V
• Output Voltage from 0.8V(TMI3253)
• 600kHz Switch Frequency
• Up to 3.5A/1.2V Output Current
• COT control to achieve fast transient responses
• Power Save Mode at Light Load
• Integrated internal compensation
• Stable with Low ESR Ceramic Output Capacitors
• Over Current Protection with Hiccup Mode
• Thermal Shutdown
• Inrush Current Limit and Soft Start
• Build in Input Over Voltage Protection
• Available in SOT23-6 Package
• Integrated 95m and 50m FETs
• Continuous Current
TSOT-23-6 (FC) : 3A
SOT-563 (FC) : 2.5A
• Input Supply Voltage Range : 4.5V to 17V
• Maximum Output Voltage Range : 7V
• Advanced Constant On-Time (ACOTTM) Control
Ultrafast Transient Response
Optimized for Low-ESR Ceramic Output Capacitors
• High Accuracy Feedback Reference Voltage :± 1%
• Optional for Operation Modes :
RT6253A : Power Saving Mode (PSM)
RT6253B : Forced PWM Mode
• Fixed Switching Frequency : 580kHz
• Enable Control and Fixed Soft-Start with typ. 1ms
• Safe Start-Up from Pre-biased Output
• Input Under-Voltage Lockout (UVLO)
• Protection Function
Output Under-Voltage Protection (UVP) with Hiccup Mode
High- / Low-side MOSFET OCP and OTP Function
• RoHS Compliant and Halogen Free
