LTC3221-5 datasheet(2/12 Pages) LINER

2 / 12 page

LTC3221/

LTC3221-3.3/LTC3221-5

3221f

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

(Note 1)

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.

ELECTRICAL CHARACTERISTICS

ABSOLUTE

AXI U

RATI GS

FOR ATIO

PACKAGE/ORDER I

TOP VIEW

C+

C–

SHDN/FB*

VOUT

VIN

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.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

LTC3221-3.3

VIN

Input Supply Voltage

●

1.8

4.4

VOUT

Output Voltage

1.8V ≤ VIN ≤ 4.4V, IOUT ≤ 25mA

2V ≤ VIN < 4.4V, IOUT ≤ 60mA

●

3.168

3.3

3.432

ICC

Operating Supply Current

IOUT = 0mA

●

815

µA

Output Ripple

VIN = 2V, IOUT = 60mA, COUT = 4.7µF (Note 3)

mVP-P

Efﬁciency

VIN = 2V, IOUT = 60mA (Note 3)

ISC

Output Short-Circuit Current

VOUT = 0V

●

120

240

LTC3221-5

VIN

Input Supply Voltage

●

2.7

5.5

VOUT

Output Voltage

2.7V ≤ VIN ≤ 5.5V, IOUT < 25mA

3V ≤ VIN ≤ 5.5V, IOUT < 60mA

●

4.8

5.2

ICC

Operating Supply Current

IOUT = 0mA

●

815

µA

Output Ripple

VIN = 3V, IOUT = 60mA, COUT = 4.7µF (Note 3)

mVP-P

Efﬁciency

VIN = 3V, IOUT = 60mA (Note 3)

ISC

Output Short-Circuit Current

VOUT = 0V

●

120

240

LTC3221

VIN

Input Supply Voltage

●

1.8

5.5

VFB

Feedback Voltage

●

1.181

1.23

1.279

ROL

Open-Loop Impedance

VIN = 1.8V, VOUT = 3V (Note 4)

●

ICC

Operating Supply Current

IOUT = 0mA

●

512

µA

IFB

FB Input Current

FB = 1.33V, VIN = 2V

●

–100

100

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