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Linear Technology Electronic Components Datasheet

LTC3204 Datasheet

Low Noise Regulated Charge Pump

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LTC3204 pdf
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LTC3204-3.3/LTC3204-5/
LTC3204B-3.3/LTC3204B-5
Low Noise Regulated
Charge Pump in 2 × 2 DFN
FEATURES
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
APAvPaiLlaIbCleAinTLIoOw UPrSofile 6-Lead DFN Package
2 AA Cell to 3.3V
Li-Ion to 5V
USB On-The-Go Devices
White LED Drivers
Handheld Devices
TYPICAL APPLICATIO
2.2µF
2.7V TO 5.5V
2.2µF
5
2
C
VIN
4
C+
VOUT
3
LTC3204-5/
1, 7
LTC3204B-5
GND
OFF ON 6 SHDN
5V
2.2µF
3204 TA01a
DESCRIPTIO
The LTC®3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5
are low noise, constant frequency (1.2MHz) switched ca-
pacitor voltage doublers. The LTC3204-3.3/LTC3204B-3.3
can produce a regulated output voltage of 3.3V
from a minimum input voltage of 1.8V (2 alkaline cells)
whereas the LTC3204-5/LTC3204B-5 can produce 5V from
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
frequency operation at any load. Built-in soft-start circuitry
prevents excessive inrush current during start-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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Burst Mode is a registered trademark of Linear Technology Corporation.
*Protected by U.S. Patents including 6411531.
Output Ripple vs Load Current
30
OUTPUT CAPACITANCE = 2.2µF
25 VIN = 3.6V
20
15 LTC3204-5
10
LTC3204B-5
5
0
0 25 50 75 100 125 150
OUTPUT CURRENT (mA)
3204 TA01b
3204fa
1


Linear Technology Electronic Components Datasheet

LTC3204 Datasheet

Low Noise Regulated Charge Pump

No Preview Available !

LTC3204 pdf
LTC3204-3.3/LTC3204-5/
LTC3204B-3.3/LTC3204B-5
ABSOLUTE AXIwww.DataSheet4U.com U RATI GS
(Note 1)
VIN to GND ................................................... –0.3V to 6V
VOUT to GND ............................................. –0.3V to 5.5V
SHDN to GND............................................... –0.3V to 6V
VOUT Short-Circuit Duration ............................. Indefinite
Operating Temperature Range (Note 2) ...–40°C to 85°C
Storage Temperature Range.................. –65°C to 125°C
Maximum Junction Temperature .......................... 125°C
PACKAGE/ORDER IUFORWATIOU
ORDER PART
NUMBER
LTC3204EDC-3.3
TOP VIEW
LTC3204EDC-5
GND 1
6 SHDN
VIN 2 7 5 C
VOUT 3
4 C+
LTC3204BEDC-3.3
LTC3204BEDC-5
DC PART
MARKING
DC PACKAGE
6-LEAD (2mm × 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 80°C/W
EXPOSED PAD IS GND (PIN 7)
MUST BE SOLDERED TO PCB
LBJV
LBNK
LBVF
LBVG
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature
SHDN = VIN,
range. Specifications are
CFLY = 2.2µF, CIN = 2.2µF,
aCtOTUAT
=
=
25°C,
2.2µF
VuInNle=s2s.o4tVhe(LrTwCis3e20n4o-t3e.d3./LTC3204B-3.3)
or
3.6V
(LTC3204-5/LTC3204B-5),
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN Input Voltage Range
(LTC3204-3.3/LTC3204B-3.3)
(LTC3204-5/LTC3204B-5)
1.8
2.7
4.5 V
5.5 V
VOUT Output Voltage Range
IIN No Load Input Current
ISHDN
IBURST
Shutdown Current
Burst Mode Threshold
1.8V < VIN < 4.5V, IOUT < 40mA
1.9V < VIN < 4.5V, IOUT < 50mA (LTC3204-3.3/LTC3204B-3.3) 3.168 3.3 3.432
2.7V < VIN < 5.5V, IOUT < 65mA
3.1V < VIN < 5.5V, IOUT < 150mA (LTC3204-5/LTC3204B-5) 4.8 5 5.2
IOUT = 0 (LTC3204-3.3)
IOUT = 0 (LTC3204-5)
IOUT = 0 (LTC3204B-3.3)
IOUT = 0 (LTC3204B-5)
48
60
1.25
3.6
SHDN = 0V, VOUT = 0V
1
(LTC3204-3.3)
15
(LTC3204-5)
20
V
V
µA
µA
mA
mA
µA
mA
mA
VR Output Ripple
IOUT = 100mA
η Efficiency
VIN = 3V, IOUT = 100mA (LTC3204-5/LTC3204B-5)
fOSC Switching Frequency
VIH SHDN Input Threshold
VIL SHDN Input Threshold
IIH SHDN Input Current
IIL SHDN Input Current
SHDN = 0V
ROL Effective Open-Loop Output VIN = 1.8V, VOUT = 3V (LTC3204-3.3/LTC3204B-3.3)
Resistance (Note 3)
VIN = 2.7V, VOUT = 4.5V (LTC3204-5/LTC3204B-5)
ILIM Output Current Limit
VOUT = OV
TSS Soft-Start Time
From the Rising Edge of SHDN to 90% of VOUT
20 mVP-P
82 %
0.6 1.2 1.8
MHz
1.3
V
0.4 V
–1
1 µA
–1
1 µA
7Ω
6Ω
300 mA
0.75 ms
Note 1: Absolute Maximum Ratings are those beyond which the life of a
device may be impaired.
Note 2: The LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are
guaranteed to meet performance specifications from 0°C to 70°C.
Specifications over the –40°C to 85°C operating temperature range are
assured by design, characterization and correlation with statistical process
controls.
Note 3: ROL (2VIN – VOUT)/IOUT
3204fa
2


Part Number LTC3204
Description Low Noise Regulated Charge Pump
Manufacturer Linear Technology
Total Page 12 Pages
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