RT9971 datasheet(16/22 Pages) RICHTEK

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DS9971-01 April 2011

www.richtek.com

RT9971

CH6 Load Transient Response

Time (1ms/Div)

IOUT

(20mA/Div)

VOUT_CH6_ac

(50mV/Div)

VDDM = 5V, VBAT = 3.7V, VOUT_CH6 = -8V,

IOUT = 15mA to 50mA, L6 = 10

μH, C18 = 10μFx2

CH5 Load Transient Response

Time (1ms/Div)

IOUT

(20mA/Div)

VOUT_CH5_ac

(50mV/Div)

VDDM = 5V, VBAT = 3.7V, VOUT_CH5 = 16V,

IOUT = 10mA to 30mA, L5 = 10

μH, C16 = 10μF

CH4 Load Transient Response

Time (1ms/Div)

IOUT

(200mA/Div)

VOUT_CH4_ac

(50mV/Div)

VDDM = 3V, VBAT = 1.8V, VOUT_CH4 = 1V,

IOUT = 100mA to 300mA, L4 = 4.7

μH, C12 = 10μF

CH3 Load Transient Response

Time (1ms/Div)

IOUT

(200mA/Div)

VOUT_CH3_ac

(50mV/Div)

VDDM = 5V, VBAT = 3V, VOUT_CH3 = 2.5V,

IOUT = 100mA to 300mA, L3 = 2.2

μH, C9 = 10μF

CH1 Load Transient Response

Time (1ms/Div)

IOUT

(200mA/Div)

VOUT_CH1_ac

(100mV/Div)

VDDM = 3V, VBAT = 1.8V, VOUT_CH1 = 3.3V,

IOUT = 50mA to 250mA, L1 = 2.2

μH, C1 = 10μFx2

CH2 Load Transient Response

Time (1ms/Div)

IOUT

(200mA/Div)

VOUT_CH2_ac

(100mV/Div)

VDDM = 5V, VBAT = 3.7V, VOUT_CH2 = 3.3V,

IOUT = 0 to 300mA, L2 = 4.7

μH, C5 = 10μF

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