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| Input Voltage Range : 1.8V ~ 5.5V Small Input Current : 80 A (PFM mode) Maximum Output Current : 80mA (3.6V 5V step-up) Low Ripple PFM (pulse skip) Operation During Light Loads CE (chip enable) Function Ultra Small MSOP-8 Package General Description The XC9801 series are step-up charge pump ICs which provide stable, highly efficient, positive voltages with the only external components required being 2 capacitors. Output voltage is selectable in 0.1V steps within a 2.5V ~ 5.2V range and with output stabilised through the control of the charge pump's output impedance, ripple is minimal. Control switches to PFM (pulse skip) during light loads without affecting output impedance or ripple so that the IC is protected against drops in efficiency. As well as the ultra small MSOP-8 package, the small consumption current and high efficiencies of the series make the XC9801 suitable for use with all types of battery operated applications. Applications Palm top computers, PDAs On Board Local Power Supplies Various Battery Powered Devices Features Input Voltage Range : 1.8V ~ 5.5V Output Voltage Range : 2.5V ~ 5.2V Small Input Current : 80A (no load) Output Current : 80mA (3.6V 5V step-up) Oscillation Frequency : 300kHz Stand-By Current (CE 'L') : 2.0 A (max) Can be used as a Step-Up Doubler (sense = 0V) MSOP-8 Package Pin Assignment PIN NUMBER 1 2 3 4 5 6 7 8 PIN NAME SENSE CE VIN GND PGND C1 C1 VOUT FUNCTION Output Voltage Monitor Chip Enable Input (power supply) Ground Power Ground External Capacitor External Capacitor + Output Absolute Maximum Ratings Ta = 25 OC, GND = 0V PARAMETER VIN pin voltage VOUT pin voltage C1+ pin voltage C1- pin voltage CE pin voltage VOUT pin output current Power dissipation Operating Temperature Storage Temperature SYMBOL VIN VOUT C1 C1 VCE IOUT Pd Topr Tstg CONDITIONS -0.3 ~ 6 -0.3 ~ 12 -0.3 ~ VOUT + 0.3 -0.3 ~ VOUT + 0.3 -0.3 ~ VIN + 0.3 200 150 - 30 ~ + 80 - 40 ~ + 125 UNITS V V V V V mA mW O C O C B Pin Configuration, Circuit Connection Example VOUT SENSE CE VIN GND VOUT C1 C1 PGND CE C2= 2.2uF VIN CIN =1uF C1= 0.47uF B |
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