· High Voltage Input Buck Converter (BUCK1)
- 4.5V to 30V input voltage Range
- Up to 1A Output Current
- 1.5MHz Switch Frequency
- Adjustable Output Voltage with 0.8V VREF
- Force Constant Current PWM Operation
- COT control to fast transient responses
- Stable with Low ESR Ceramic Capacitors
- Over Current Protection with Hiccup Mode
· Double Low Voltage Input Buck Converter (BUCK2 & BUCK3)
- 2.7V to 5.5V Input Voltage Range
- Up to 1A Output Current
- 2.3MHz Switch Frequency
- Adjustable Output Voltage with 0.6V VREF
- Power Good Output Function
- 100% Duty Cycle in Dropout Mode
- Overcurrent Limit and Output Short Protection
· 300mA LDO
- 2.5V to 5.5V Input Voltage Range
- Up to 300mA Output Current
- 18µA Quiescent Current Typically
- 70dB PSRR at 1kHz - Low Shutdown Current: <0.1µA
- Output Voltage Accuracy: ±2%
- Output Current Limit Protection
- Adjustable Output Voltage with 1.2V VREF
- Stable with Ceramic Output Capacitors
- Output Auto-Discharge in EN Shutdown
· RoHS Compliant and 100% Lead (Fb)-Free
· QFN 4mmx4mm 24pin Package
TMI7205B is single-chip power management IC integrating one wide input voltage and high efficiency synchronous Buck convert (BUCK1), double low voltage 1A synchronous Buck convert (BUCK2 & BUCK 3) and one 300mA low-dropout linear regulators (LDO). BUCK1 operates in force PWM mode and capable of delivering up to 1A output current. BUCK2 & BUCK3 is 2.3MHz switching frequency current mode buck converter and it can run at 100% duty cycle for low dropout operation. BUCK2 & BUCK3 offers PFM mode and PWM mode, which allows a high efficiency over the wider range of the load condition. LDO is designed to work with low-ESR ceramic capacitors, reducing the amount of the PCB area necessary for power applications. Only a 2.2μF ceramic output capacitor can make the device stable over the whole load range current (0mA to 300mA). Advanced production features include input UVLO, thermal shutdown, soft start and input OVP.
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