LTC3200-5_15 Datasheet, PDF (4/12 Pages) Linear Technology – Low Noise, Regulated Charge Pump DC/DC Converters

LTC3200/LTC3200-5
TYPICAL PERFOR A CE CHARACTERISTICS ^{(LTC3200-5) T}A ^{= 25°C}
V_OUT Soft-Start Ramp
V_SHDN
2V/DIV
V_OUT
1V/DIV
V_IN = 3V
200µs/DIV
Output Ripple
V_OUT (AC
COUPLED)
20mV/DIV
C_OUT = 1µF
C_OUT = 3.3µF
C_OUT = 10µF
32005 G08
V_IN = 3.3V
I_L = 100mA
200ns/DIV
Load Transient Response
I_L
10mA TO
90mA
50mA/DIV
V_OUT
(AC
COUPLED)
50mV/DIV
32005 G09
V_IN = 3.3V
C_OUT = 1µF
10µs/DIV
32005 G10
PIN FUNCTIONS _{LTC3200/LTC3200-5}
C⁺ (Pins 1/6): Flying Capacitor Positive Terminal.
V_IN (Pins 2/5): Input Supply Voltage. V_IN should be
bypassed with a 1µF to 4.7µF low ESR ceramic capacitor.
C^– (Pins 3/4): Flying Capacitor Negative Terminal.
GND (Pins 4,5/2): Ground. Should be tied to a ground
plane for best performance.
SHDN (Pins 6/3): Active Low Shutdown Input. A low on
SHDN disables the LTC3200/LTC3200-5. SHDN must not
be allowed to float.
FB (Pin 7): (LTC3200 Only) Feedback Input Pin. An output
divider should be connected from V_OUT to FB to program
the output voltage.
V_OUT (Pins 8/1): Regulated Output Voltage. V_OUT should
be bypassed with a 1µF to 4.7µF low ESR ceramic capaci-
tor as close as possible to the pin for best performance.
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