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LTC3240 Datasheet, PDF (2/12 Pages) Linear Technology – 3.3V/2.5V Step-Up/ Step-Down Charge Pump DC/DC Converter | |||
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LTC3240-3.3/LTC3240-2.5
ABSOLUTE AXI U RATI GS
(Note 1)
VIN to GND ................................................... â0.3V to 6V
VOUT to GND ............................................. â0.3V to 5.5V
â¯Sâ¯Hâ¯Dâ¯N to GND................................ â0.3V to (VIN + 0.3V)
VOUT Short-Circuit Duration ............................. Indeï¬nite
Operating Temperature Range (Note 2) ...â40°C to 85°C
Storage Temperature Range...................â65°C to 125°C
Maximum Junction Temperature .......................... 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
GND 1
6 SHDN
VIN 2
7
5 Câ
VOUT 3
4 C+
DC PACKAGE
6-LEAD (2mm à 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 80°C/W (NOTE 4)
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER DC PART MARKING
LTC3240EDC-3.3
LTC3240EDC-2.5
LBXJ
LCBP
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts speciï¬ed with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The â denotes the speciï¬cations which apply over the full operating
temperature range, otherwise speciï¬cations are at TA = 25°C, â¯Sâ¯Hâ¯Dâ¯N = VIN, CFLY = 1µF, CIN = 1µF, COUT = 4.7µF unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN
VOUT
IIN
Iâ¯Sâ¯Hâ¯Dâ¯N
η
VIH
VIL
IIH
IIL
ILIM
tON
Input Voltage Range
Output Voltage Range
LTC3240-3.3
LTC3240-2.5
No Load Input Current
Shutdown Current
Efï¬ciency
LTC3240-3.3
LTC3240-2.5
â¯Sâ¯Hâ¯Dâ¯N Input High Voltage
â¯Sâ¯Hâ¯Dâ¯N Input Low Voltage
â¯Sâ¯Hâ¯Dâ¯N Input Current
â¯Sâ¯Hâ¯Dâ¯N Input Current
Output Current Limit
VOUT Turn-On Time
Step-Up Mode
â 1.8
5.5
V
1.8V ⤠VIN ⤠2.5V, IOUT < 40mA
2.5V ⤠VIN ⤠5.5V, IOUT < 150mA
â 3.168 3.3 3.432
V
â 3.168 3.3 3.432
V
1.8V ⤠VIN ⤠5.5V, IOUT < 60mA
â 2.4
2.5
2.6
V
IOUT = 0, 1.8V ⤠VIN ⤠5.5V
65
100
µA
â¯Sâ¯Hâ¯Dâ¯N = 0V, VOUT = 0V
0.1
1
µA
VIN = 2.5V, IOUT = 100mA
VIN = 3.7V, IOUT = 100mA
64
%
87
%
VIN = 2V, IOUT = 50mA
VIN = 3V, IOUT = 50mA
63
%
83
%
1.8V ⤠VIN ⤠5.5V
â 1.2
V
1.8V ⤠VIN ⤠5.5V
â
0.4
V
Vâ¯Sâ¯Hâ¯Dâ¯N = VIN = 5.5V
â â1
1
µA
Vâ¯Sâ¯Hâ¯Dâ¯N = 0V
â â1
1
µA
VIN = 3.7V, VOUT = 0V Step-Down Mode
VIN = 2.4V, VOUT = 0V Step-Up Mode
450
mA
270
mA
From the Rising Edge of â¯Sâ¯Hâ¯Dâ¯N to 90% of VOUT
VIN = 2.5V, RLOAD = 66Ω
VIN = 3.7V, RLOAD = 66Ω
0.5
ms
0.4
ms
IBURST
Burst Mode Threshold
VIN = 2.4V
VRIPPLE
Output Ripple
IOUT = 100mA, VOUT = 2.5V or 3.3V
fOSC
Switching Frequency
VIN = 2.4V
VRIPPLE(BURST)
Burst Mode® Output Ripple
VIN = 2.4V
Burst Mode is a registered trademark of Linear Technology Corporation.
15
mA
20
mVP-P
â 0.6
1.2
1.8
MHz
20
mVP-P
3240fb
2
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