LTC3240-3.3_15 Datasheet, PDF (2/12 Pages) Linear Technology – 3.3V/2.5V Step-Up/ Step-Down Charge Pump DC/DC Converter

LTC3240-3.3/LTC3240-2.5
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN to GND ................................................... –0.3V to 6V
V_OUT to GND ............................................. –0.3V to 5.5V
⎯S⎯H⎯D⎯N to GND................................ –0.3V to (V_IN + 0.3V)
V_OUT 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
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
GND 1
6 SHDN
V_IN 2
7
5 C^–
V_OUT 3
4 C⁺
DC PACKAGE
6-LEAD (2mm × 2mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 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 specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C, ^⎯S^⎯H^⎯D^⎯N = V_IN, C_FLY = 1µF, C_IN = 1µF, C_OUT = 4.7µF unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_IN
V_OUT
I_IN
I⎯_S⎯_H⎯_D⎯_N
η
V_IH
V_IL
I_IH
I_IL
I_LIM
t_ON
Input Voltage Range
Output Voltage Range
LTC3240-3.3
LTC3240-2.5
No Load Input Current
Shutdown Current
Efficiency
LTC3240-3.3
LTC3240-2.5
⎯S⎯H⎯D⎯N Input High Voltage
⎯S⎯H⎯D⎯N Input Low Voltage
⎯S⎯H⎯D⎯N Input Current
⎯S⎯H⎯D⎯N Input Current
Output Current Limit
V_OUT Turn-On Time
Step-Up Mode
● 1.8
5.5
V
1.8V ≤ V_IN ≤ 2.5V, I_OUT < 40mA
2.5V ≤ V_IN ≤ 5.5V, I_OUT < 150mA
● 3.168 3.3 3.432
V
● 3.168 3.3 3.432
V
1.8V ≤ V_IN ≤ 5.5V, I_OUT < 60mA
● 2.4
2.5
2.6
V
I_OUT = 0, 1.8V ≤ V_IN ≤ 5.5V
65
100
µA
⎯S⎯H⎯D⎯N = 0V, V_OUT = 0V
0.1
1
µA
V_IN = 2.5V, I_OUT = 100mA
V_IN = 3.7V, I_OUT = 100mA
64
%
87
%
V_IN = 2V, I_OUT = 50mA
V_IN = 3V, I_OUT = 50mA
63
%
83
%
1.8V ≤ V_IN ≤ 5.5V
● 1.2
V
1.8V ≤ V_IN ≤ 5.5V
●
0.4
V
V⎯_S⎯_H⎯_D⎯_N = V_IN = 5.5V
● –1
1
µA
V⎯_S⎯_H⎯_D⎯_N = 0V
● –1
1
µA
V_IN = 3.7V, V_OUT = 0V Step-Down Mode
V_IN = 2.4V, V_OUT = 0V Step-Up Mode
450
mA
270
mA
From the Rising Edge of ⎯S⎯H⎯D⎯N to 90% of V_OUT
V_IN = 2.5V, R_LOAD = 66Ω
V_IN = 3.7V, R_LOAD = 66Ω
0.5
ms
0.4
ms
I_BURST
Burst Mode Threshold
V_IN = 2.4V
V_RIPPLE
Output Ripple
I_OUT = 100mA, V_OUT = 2.5V or 3.3V
f_OSC
Switching Frequency
V_IN = 2.4V
V_{RIPPLE(BURST)}
Burst Mode^® Output Ripple
V_IN = 2.4V
Burst Mode is a registered trademark of Linear Technology Corporation.
15
mA
20
mV_P-P
● 0.6
1.2
1.8
MHz
20
mV_P-P
3240fb
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