Datasheet

LTC3240-3.3/LTC3240-2.5
2
3240fb
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 ............................. Indefi nite
Operating Temperature Range (Note 2) ...–40°C to 85°C
Storage Temperature Range ...................–65°C to 125°C
Maximum Junction Temperature .......................... 125°C
ORDER PART NUMBER
T
JMAX
= 125°C, θ
JA
= 80°C/W (NOTE 4)
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
LTC3240EDC-3.3
LTC3240EDC-2.5
(Note 1)
The
● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations 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.
ELECTRICAL CHARACTERISTICS
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
TOP
VIEW
DC PACKAGE
6-LEAD (2mm × 2mm) PLASTIC DFN
4
57
6
3
2
1GND
V
IN
V
OUT
SHDN
C
–
C
+
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Voltage Range ● 1.8 5.5 V
V
OUT
Output Voltage Range 1.8V ≤ V
IN
≤ 2.5V, I
OUT
< 40mA ● 3.168 3.3 3.432 V
LTC3240-3.3 2.5V ≤ V
IN
≤ 5.5V, I
OUT
< 150mA ● 3.168 3.3 3.432 V
LTC3240-2.5 1.8V ≤ V
IN
≤ 5.5V, I
OUT
< 60mA ● 2.4 2.5 2.6 V
I
IN
No Load Input Current I
OUT
= 0, 1.8V ≤ V
IN
≤ 5.5V 65 100 µA
I
⎯
S
⎯
H
⎯
D
⎯
N
Shutdown Current
⎯
S
⎯
H
⎯
D
⎯
N = 0V, V
OUT
= 0V 0.1 1 µA
η Effi ciency V
IN
= 2.5V, I
OUT
= 100mA 64 %
LTC3240-3.3 V
IN
= 3.7V, I
OUT
= 100mA 87 %
LTC3240-2.5 V
IN
= 2V, I
OUT
= 50mA 63 %
V
IN
= 3V, I
OUT
= 50mA 83 %
V
IH
⎯
S
⎯
H
⎯
D
⎯
N Input High Voltage 1.8V ≤ V
IN
≤ 5.5V ● 1.2 V
V
IL
⎯
S
⎯
H
⎯
D
⎯
N Input Low Voltage 1.8V ≤ V
IN
≤ 5.5V ● 0.4 V
I
IH
⎯
S
⎯
H
⎯
D
⎯
N Input Current V
⎯
S
⎯
H
⎯
D
⎯
N
= V
IN
= 5.5V ● –1 1 µA
I
IL
⎯
S
⎯
H
⎯
D
⎯
N Input Current V
⎯
S
⎯
H
⎯
D
⎯
N
= 0V ● –1 1 µA
I
LIM
Output Current Limit V
IN
= 3.7V, V
OUT
= 0V Step-Down Mode 450 mA
V
IN
= 2.4V, V
OUT
= 0V Step-Up Mode 270 mA
t
ON
V
OUT
Turn-On Time From the Rising Edge of
⎯
S
⎯
H
⎯
D
⎯
N to 90% of V
OUT
V
IN
= 2.5V, R
LOAD
= 66Ω 0.5 ms
V
IN
= 3.7V, R
LOAD
= 66Ω 0.4 ms
Step-Up Mode
I
BURST
Burst Mode Threshold V
IN
= 2.4V 15 mA
V
RIPPLE
Output Ripple I
OUT
= 100mA, V
OUT
= 2.5V or 3.3V 20 mV
P-P
f
OSC
Switching Frequency V
IN
= 2.4V ● 0.6 1.2 1.8 MHz
V
RIPPLE(BURST)
Burst Mode
®
Output Ripple V
IN
= 2.4V 20 mV
P-P
Burst Mode is a registered trademark of Linear Technology Corporation.
DC PART MARKING
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/
LBXJ
LCBP
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.