Features: ` Wide 4.5V to 28V Input Voltage Range` 1.5A Output Current (12VIN to 5VOUT)` Output Adjustable Down to 0.81V` 0.3 Internal Power MOSFET` Up to 92% Efficiency` Stable with Low ESR Ceramic Output Capacitors` Fixed 1.4MHz Operating Frequency` Internal Soft-Start Function` Over Current Prot...
ACT4088: Features: ` Wide 4.5V to 28V Input Voltage Range` 1.5A Output Current (12VIN to 5VOUT)` Output Adjustable Down to 0.81V` 0.3 Internal Power MOSFET` Up to 92% Efficiency` Stable with Low ESR Ceramic ...
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PARAMETER |
VALUE |
UNIT |
IN Supply Voltage SW Voltage BST Voltage EN, FB Voltage Continuous SW Current Junction to Ambient Thermal Resistance ( JA) Maximum Power Dissipation Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) |
-0.3 to 32 -1 to VIN + 1 VSW - 0.3 to VSW + 7 -0.3 to 6 Internally Limited 220 0.5 -40 to 150 -55 to 150 300 |
V V V V A °C/W W °C °C °C |
: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.
The ACT4088 is a current-mode step-down DC/DC converter that supplies up to 1.5A into 5V from a 12V input. 1.4MHz switching frequency allows the use of tiny external components, and internal loop ompensation provides simple, stable power supplies with a minimum of external components. Optimized for use with ceramic input and output capacitors, the ACT4088 provides a very compact 1.5A power supply for space constrained mobile and consumer applications.
The ACT4088 operates over a wide input voltage range and utilizes current-mode operation to provide excellent line and load transient response while requiring no external compensation components. Fault protection includes cycle-by-cycle current limiting, frequency fold-back, hiccup mode, and thermal shutdown. Internal soft-start provides a controlled startup with no overshoot, even at light loads.
The ACT4088 is available in a tiny SOT23-6 package and requires very few external components.