XC6416 Datasheet, PDF (9/30 Pages) Torex Semiconductor – Dual LDO Voltage Regulator with “GreenOperation”

XC6416
Series
˙OPERATIONAL DESCRIPTION
<Output Voltage Control>
The voltage divided by resistors Rx1 & Rx2 is compared with the internal reference voltage by the error amplifier. The
P-channel MOSFET connected to the VOUT pin is then driven by the subsequent output signal. The output voltage at the
VOUT pin is controlled & stabilized by a system of negative feedback. The current limit circuit and short protect circuit operate
in relation to the level of output current. Further, the IC's internal circuitry can be shutdown via the EN pin's signal.
< XC6416CD Series >
<GreenOperation>
XC6416C/D/G/H series can be set as a fixed high-speed (HS) mode or a green operation (GO) mode via a signal to the green
operation (GO) pin. The IC operates in the GO mode when the GO pin becomes low level and the IC operates in the fixed
high-speed mode when the GO pin becomes high level. The XC6416A/B/E/F series normally operates in GO mode because
the GO signal is fixed to the V_SS level inside the IC. The GO mode enables the IC to switch automatically the supply current to
the high speed (HS) mode and the power save (PS) mode according to the level of output current. While having both
high-speed operation and low supply current state, the series can acquire high efficiency. At the HS/PS automatic switching
mode (GO mode), the switching point of the HS mode and the PS mode is being fixed inside the IC. When the output current
becomes IGOR 1.5mA (TYP.) or below, the mode changes automatically to the PS mode after the delay time of hundreds Жs
(TYP.), and it can reduce supply current in light load. Also when the output current becomes IGO 4mA (TYP.) or more, the
mode changes automatically to the HS mode and the IC becomes high speed operation.
<Input and Output Capacitor>
The XC6416 needs an output capacitor for phase compensation. The requested capacitance values are described in the table
below. The device may go into unstable operation when the output capacitance reduction happens as a result of bias or
temperature drift. Please choose a capacitor with less influence from temperature and bias. Also, please place 1.0ЖF input
capacitor C_L between V_IN and V_SS pins for stabilizing input supply voltage.
Output Capacitor Table
OUTPUT VOLTAGE
0.8Vʙ2.35V
2.4Vʙ4.0V
ç
OUTPUT CAPACITOR
C_Lʾ2.2ЖFç
C_Lʾ1.0ЖFç
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