LTC3221 データシートの表示（PDF） - Linear Technology
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LTC3221 Datasheet PDF : 12 Pages
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LTC3221/
LTC3221-3.3/LTC3221-5
ABSOLUTE AXI U RATI GS
(Note 1)
VIN, ⎯S⎯H⎯D⎯N, FB............................................. – 0.3V to 6V
VOUT to GND............................................. – 0.3V to 5.5V
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
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
C+ 1
6 VOUT
C– 2
7
5 VIN
SHDN/FB* 3
4 GND
TJMAX = 125°C, θJA = 80°C/W
EXPOSED PAD IS GND (PIN 7) MUST BE SOLDERED TO PCB
*⎯S⎯H⎯D⎯N ON LTC3221-3.3;LTC3221-5 FB ON LTC3221
ORDER PART NUMBER DC PART MARKING
LTC3221EDC
LTC3221EDC-3.3
LTC3221EDC-5
LCCP
LBQP
LCCN
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 TA = 25°C. VIN = 2.5V (LTC3221-3.3/LTC3221) or 3V (LTC3221-5), ⎯S⎯H⎯D⎯N = VIN,
CFLY = 1µF, CIN = 2.2µF, COUT = 2.2µF, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
LTC3221-3.3
VIN
Input Supply Voltage
● 1.8
4.4
V
VOUT
Output Voltage
1.8V ≤ VIN ≤ 4.4V, IOUT ≤ 25mA
2V ≤ VIN < 4.4V, IOUT ≤ 60mA
ICC
Operating Supply Current
IOUT = 0mA
● 3.168 3.3 3.432
V
●
8
15
µA
VR
Output Ripple
VIN = 2V, IOUT = 60mA, COUT = 4.7µF (Note 3)
35
mVP-P
η
Efficiency
VIN = 2V, IOUT = 60mA (Note 3)
82
%
ISC
Output Short-Circuit Current
VOUT = 0V
●
120
240
mA
LTC3221-5
VIN
Input Supply Voltage
● 2.7
5.5
V
VOUT
Output Voltage
2.7V ≤ VIN ≤ 5.5V, IOUT < 25mA
3V ≤ VIN ≤ 5.5V, IOUT < 60mA
ICC
Operating Supply Current
IOUT = 0mA
● 4.8
5
5.2
V
●
8
15
µA
VR
Output Ripple
VIN = 3V, IOUT = 60mA, COUT = 4.7µF (Note 3)
45
mVP-P
η
Efficiency
VIN = 3V, IOUT = 60mA (Note 3)
82
%
ISC
Output Short-Circuit Current
VOUT = 0V
●
120
240
mA
LTC3221
VIN
Input Supply Voltage
VFB
Feedback Voltage
ROL
Open-Loop Impedance
VIN = 1.8V, VOUT = 3V (Note 4)
ICC
Operating Supply Current
IOUT = 0mA
IFB
FB Input Current
FB = 1.33V, VIN = 2V
● 1.8
5.5
V
● 1.181 1.23 1.279
V
●
10
20
Ω
●
5
12
µA
● –100
100
nA
3221f
2
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