LTC3221EDC-3.3#TR Linear Technology, LTC3221EDC-3.3#TR Datasheet

LTC3221EDC-3.3#TR

Manufacturer Part Number

LTC3221EDC-3.3#TR

Description

IC,DC/DC CONVERTER,+3.3V,CMOS,LLCC,6PIN

Manufacturer

Linear Technology

Datasheet

1.LTC3221EDC-3.3TR.pdf (12 pages)

Specifications of LTC3221EDC-3.3#TR

Operating Supply Voltage (min)

1.8V

Operating Supply Voltage (max)

4.4V

Operating Temp Range

-40C to 85C

Operating Temperature Classification

Industrial

Pin Count

Mounting

Surface Mount

Lead Free Status / Rohs Status

Not Compliant

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FEATURES

APPLICATIO S

■

TYPICAL APPLICATIO

Ultralow Power: 8µA Quiescent Current

Regulated Output Voltages: 3.3V ±4%, 5V ±4%, ADJ

Output Current: Up to 60mA

No Inductors Needed

Very Low Shutdown Current: <1µA

Shutdown Disconnects Load from V

Burst Mode Control

Short-Circuit Protected

Solution Proﬁ le < 1mm

Tiny 2mm × 2mm 6-Pin DFN Package

Low Power 2 AA Cell to 3.3V Supply

Memory Backup Supplies

Tire Pressure Sensors

General Purpose Low Power Li-Ion to 5V Supply

RF Transmitters

Glucose Meters

1.8V to 4.4V (LTC3221-3.3)

2.7V to 5.5V (LTC3221-5)

Range:

REGULATED 3.3V OUTPUT FROM 1.8V TO 4.4V INPUT

REGULATED 5V OUTPUT FROM 2.7V TO 5.5V INPUT

2.2µF

OFF ON

4,7

OUT

GND

SHDN

OUT

LTC3221-X

–

= OmA TO 25mA; V

= OmA TO 60mA; V

= OmA TO 25mA; V

= OmA TO 60mA; V

1µF

= 3.3V ±4%

= 5V ±4%

OUT

3221 TA01

4.7µF

OUT

>1.8V

>2V

>2.7V

>3V

DESCRIPTIO

The LTC

converters that produce a regulated output at up to 60mA.

The input voltage range is 1.8V to 5.5V. Extremely low

operating current (8µA typical at no load) and low external

parts count (one ﬂ ying capacitor and two small bypass

capacitors at V

small, battery-powered applications.

The LTC3221 family includes ﬁ xed 5V and 3.3V output

versions plus an adjustable version. All parts operate

as Burst Mode

to achieve ultralow quiescent current. The chips use a

controlled current to supply the output and will survive

a continuous short-circuit from V

of the adjustable LTC3221 can be used to program the

desired output voltage.

The LTC3221 family is available in a low proﬁ le (0.75mm)

2mm × 2mm 6-pin DFN package.

Mode is a registered trademark of Linear Technology Corporation. All other trademarks are

the property of their respective owners.

Regulated Charge Pump

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst

3221 family are micropower charge pump DC/DC

LTC3221-3.3/LTC3221-5

1.5

= 25°C

= –45°C

= 90°C

2.0

and V

No-Load Input Current

switched capacitor voltage doublers

vs Supply Voltage

SUPPLY VOLTAGE (V)

2.5

OUT

3.0

) make them ideally suited for

Micropower,

3.5

in 2 × 2 DFN

OUT

4.0

to GND. The FB pin

3221 TA01b

LTC3221/

4.5

3221f

Related parts for LTC3221EDC-3.3#TR

LTC3221EDC-3.3#TR Summary of contents

Page 1

... The LTC3221 family is available in a low proﬁ le (0.75mm) 2mm × 2mm 6-pin DFN package. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. 16 ...

Page 2

... S ⎯ H ⎯ D ⎯ LTC3221-3.3;LTC3221 LTC3221 ORDER PART NUMBER LTC3221EDC LTC3221EDC-3.3 LTC3221EDC-5 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts speciﬁ ed with wider operating temperature ranges. ...

Page 3

... UVLO Threshold UVLO Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC3221EDC-X is guaranteed to meet performance speciﬁ cations from 0°C to 70°C. Speciﬁ caiton over the –40°C to 85° TYPICAL PERFOR A CE CHARACTERISTICS ...

Page 4

LTC3221/ LTC3221-3.3/LTC3221 TYPICAL PERFOR A CE CHARACTERISTICS Load Regulation 3.36 3. 3.2V IN 3.32 3.30 3. 2.5V IN 3.26 3. 1.8V IN 3.22 3.20 3.18 3. 100 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Load Regulation 5.10 5. 4. 3. 2.7V IN 4.90 4.85 4. 100 LOAD CURRENT (mA) 3221 G16 No-Load ...

Page 6

LTC3221/ LTC3221-3.3/LTC3221 CTIO S C+ (Pin 1): Flying Capacitor Positive Terminal. C– (Pin 2): Flying Capacitor Negative Terminal. ⎯ S ⎯ H ⎯ D ⎯ N (Pin 3) (LTC3221-3.3/LTC3221-5): Active Low Shutdown Input. A low ...

Page 7

U OPERATIO (Refer to Block Diagrams) The LTC3221 has a FB pin in place of the ⎯ S ⎯ H ⎯ D ⎯ N pin. This allows the output voltage to be programmed using an external resistive divider. Burst Mode ...

Page 8

LTC3221/ LTC3221-3.3/LTC3221 APPLICATIO S I FOR ATIO depends on many factors such as the oscillator frequency (f ), value of the ﬂ ying capacitor (C OSC time, the internal switch resistances (R the external capacitors. A ﬁ rst ...

Page 9

U U APPLICATIO S I FOR ATIO be expressed by the following equation – OUT ≡ ≅ MIN ( ) I f OUT OSC where f is the switching frequency (600kHz) and C OSC ...

Page 10

LTC3221/ LTC3221-3.3/LTC3221 APPLICATIO S I FOR ATIO If the standing current is too low, the FB pin becomes very sensitive to the switching noise and will result in errors in the programmed V . OUT The compensation capacitor ...

Page 11

... DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 6-Lead Plastic DFN (2mm × ...

Page 12

... Buck/Boost Charge Pump, I Low Noise, 5V Output or Adjustable V : 2.7V to 5.5V, 3mm × 3mm DFN-10 Package 150mA (LTC3204-5 50mA (LTC3204-3. 150mA Output www.linear.com ● = 500µ 2.7V to 10V IN , 2.5V to 5.5V Output RMS = 60µ 2. 1006 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2006 3221f ...

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