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AAT4650IAS-T1 Datasheet(PDF) 1 Page - Advanced Analogic Technologies |
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AAT4650IAS-T1 Datasheet(HTML) 1 Page - Advanced Analogic Technologies |
1 / 12 page SmartSwitch™ General Description The AAT4650 SmartSwitch™ is a single channel PC Card (PCMCIA) power switch. It is used to select between two different voltage inputs, each between 2.7V and 5.5V. An internal switch powers the cir- cuitry from whichever input voltage is higher. The device's output, VCC, is slew rate controlled and cur- rent limited, in compliance with PC Card specifica- tions. The current limit response time to a short cir- cuit is typically 1µs. The internal P-Channel MOS- FET switches are configured to break before make, that is, both switches cannot be closed at the same time. Controlled by a 2 bit parallel interface, the four states for VCC are VCC5, VCC3, Hi-impedance, or Ground. When in the ground state, VCC is pulled to ground by a 5k Ω resistor. An open drain FAULT out- put is asserted during over-current conditions. During power up slewing, FAULT also signals that VCC is out of tolerance. An internal over temperature sensor forces VCC to a high impedance state when an over-temperature condition exists. Quiescent current is typically a low 15µA, as long as ICC is less than approximately 500mA. Above this load current, the quiescent current increases to 200µA. The AAT4650 is available in 8-pin SOP and TSSOP packages specified over -40 to 85°C. Features • 2.7V to 5.5V Input voltage range • 85m Ω (5V) typical R DS(ON) • Low quiescent current 15µA (typ) • Reverse-blocking switches • Short-circuit protection • Over-temperature protection • FAULT flag output • Temp range -40 to 85°C • 8 pin SOP or TSSOP package Applications • Notebook Computer • PDA, Subnotebook • Power Supply Multiplexer Circuit AAT4650 5V/3V PC Card Power Switch Typical Application COUT 0.1 µF VCC5 CIN5 1 µF CIN3 1 µF VCC3 CTL1 CTL0 FAULT VCC GND AAT4650 8 5 3 2 4 1 6,7 VCC5 VCC3 GND GND VCC CTL1 CTL0 FAULT 4650.2001.10.0.93 1 |
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