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LTC3200 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 LTC3200
部品説明 Regulated Charge Pump DC/DC Converters
メーカ Linear Technology
ロゴ Linear Technology ロゴ 

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LTC3200 Datasheet, LTC3200 PDF,ピン配置, 機能
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LTC3200/LTC3200-5
Low Noise, Regulated
Charge Pump DC/DC Converters
FEATURES
s Low Noise Constant Frequency Operation
s Output Current: 100mA
s Available in 8-Pin MSOP (LTC3200) and Low
Profile (1mm) 6-Pin ThinSOTTM (LTC3200-5)
Packages
s 2MHz Switching Frequency
s Fixed 5V ± 4% Output (LTC3200-5) or ADJ
s VIN Range: 2.7V to 4.5V
s Automatic Soft-Start Reduces Inrush Current
s No Inductors
Us ICC <1µA in Shutdown
APPLICATIO S
s White LED Backlighting
s Li-Ion Battery Backup Supplies
s Local 3V to 5V Conversion
s Smart Card Readers
s PCMCIA Local 5V Supplies
DESCRIPTIO
The LTC®3200/LTC3200-5 are low noise, constant fre-
quency switched capacitor voltage doublers. They pro-
duce a regulated output voltage from a 2.7V to 4.5V input
with up to 100mA of output current. Low external parts
count (one flying capacitor and two small bypass capaci-
tors at VIN and VOUT) make the LTC3200/LTC3200-5
ideally suited for small, battery-powered applications.
A new charge-pump architecture maintains constant
switching frequency to zero load and reduces both output
and input ripple. The LTC3200/LTC3200-5 have thermal
shutdown capability and can survive a continuous short-
circuit from VOUT to GND. Built-in soft-start circuitry
prevents excessive inrush current during start-up.
High switching frequency enables the use of small ceramic
capacitors. A low current shutdown feature disconnects
the load from VIN and reduces quiescent current to <1µA.
The LTC3200 is available in an 8-pin MSOP package and
the LTC3200-5 is available in a 6-pin ThinSOT.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
Regulated 5V Output from a 2.7V to 4.5V Input
1µF
VIN
2.7V TO 4.5V
1µF
OFF ON
46
CC+
LTC3200-5
51
VIN VOUT
2
GND
1µF
3
SHDN
VOUT = 5V ±4%
IOUT UP TO 40mA, VIN 2.7V
IOUT UP TO 100mA, VIN 3.1V
ALL CAPACITORS = MURATA GRM 39X5R105K6.3AJ
OR TAIYO YUDEN JMK107BJ105MA
3200-5 TA01
Output Ripple Voltage vs Load Current
40
VIN = 3V
CFLY = 1µF
TA = 25°C
30
COUT = 1µF
20
COUT = 2.2µF
10
0
0 25 50 75 100
OUTPUT CURRENT (mA)
3200 TA02
1

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