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LTC3204B-5 Datasheet(PDF) 1 Page - Linear Technology

Part # LTC3204B-5
Description  Low Noise Regulated Charge Pump in 2 2 DFN
Download  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3204B-5 Datasheet(HTML) 1 Page - Linear Technology

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LTC3204-3.3/LTC3204-5/
LTC3204B-3.3/LTC3204B-5
1
3204fa
FEATURES
DESCRIPTIO
TYPICAL APPLICATIO
TheLTC®3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5
are low noise, constant frequency (1.2MHz) switched ca-
pacitorvoltagedoublers.TheLTC3204-3.3/LTC3204B-3.3
can produce a regulated output voltage of 3.3V
from a minimum input voltage of 1.8V (2 alkaline cells)
whereastheLTC3204-5/LTC3204B-5canproduce5Vfrom
a minimum of 2.7V (Li-Ion battery) input.
LTC3204-3.3/LTC3204-5 feature automatic Burst Mode®
operation at light loads to maintain low supply current
whereas LTC3204B-3.3/LTC3204B-5 feature constant
frequencyoperationatanyload.Built-insoft-startcircuitry
preventsexcessiveinrushcurrentduringstart-up.Thermal
shutdown and current-limit circuitry allow the parts to
survive a continuous short-circuit from VOUT to GND.
High switching frequency minimizes overall solution
footprint by allowing the use of tiny ceramic capaci-
tors. In shutdown, the load is disconnected from the
input and the quiescent current is reduced to <1µA. The
LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are
available in a low profile (0.75mm) 6-lead 2mm × 2mm
DFN package.
Low Noise Regulated
Charge Pump in 2 × 2 DFN
Fixed 3.3V or 5V Outputs
VIN Range:
1.8V to 4.5V (LTC3204-3.3/LTC3204B-3.3)
2.7V to 5.5V (LTC3204-5/LTC3204B-5)
Output Current:
Up to 150mA (LTC3204-5/LTC3204B-5)
Up to 50mA (LTC3204-3.3/LTC3204B-3.3)
Automatic Burst Mode® Operation with IQ = 48µA
(LTC3204-3.3/LTC3204-5)
Constant Frequency Operation at All Loads
(LTC3204B-3.3/LTC3204B-5)
Low Noise Constant Frequency (1.2MHz) Operation*
Built-In Soft-Start Reduces Inrush Current
Shutdown Disconnects Load from Input
Shutdown Current <1µA
Short-Circuit/Thermal Protection
Available in Low Profile 6-Lead DFN Package
2 AA Cell to 3.3V
Li-Ion to 5V
USB On-The-Go Devices
White LED Drivers
Handheld Devices
Output Ripple vs Load Current
Burst Mode is a registered trademark of Linear Technology Corporation.
*Protected by U.S. Patents including 6411531.
APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
OFF ON
VIN
GND
SHDN
VOUT
C
C+
LTC3204-5/
LTC3204B-5
2.2
µF
2.2
µF
2.2
µF
5V
2.7V TO 5.5V
3204 TA01a
1, 7
2
3
4
5
6
OUTPUT CURRENT (mA)
0
0
5
10
15
20
30
25
50
75
100
3204 TA01b
125
150
25
OUTPUT CAPACITANCE = 2.2
µF
VIN = 3.6V
LTC3204B-5
LTC3204-5


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