LTC3221.pdf 데이터시트 (총 12 페이지) - 파일 다운로드 LTC3221 데이타시트 다운로드

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LTC3221/
LTC3221-3.3/LTC3221-5
Micropower,
Regulated Charge Pump
in 2 × 2 DFN
FEATURES
Ultralow Power: 8µA Quiescent Current
Regulated Output Voltages: 3.3V ±4%, 5V ±4%, ADJ
VIN Range:
1.8V to 4.4V (LTC3221-3.3)
www.DataSheet4U.2co.7mV to 5.5V (LTC3221-5)
Output Current: Up to 60mA
No Inductors Needed
Very Low Shutdown Current: <1µA
Shutdown Disconnects Load from VIN
Burst Mode Control
Short-Circuit Protected
Solution Profile < 1mm
Tiny 2mm × 2mm 6-Pin DFN Package
U
APPLICATIO S
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
DESCRIPTIO
The LTC®3221 family are micropower charge pump DC/DC
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 flying capacitor and two small bypass
capacitors at VIN and VOUT) make them ideally suited for
small, battery-powered applications.
The LTC3221 family includes fixed 5V and 3.3V output
versions plus an adjustable version. All parts operate
as Burst Mode® switched capacitor voltage doublers
to achieve ultralow quiescent current. The chips use a
controlled current to supply the output and will survive
a continuous short-circuit from VOUT to GND. The FB pin
of the adjustable LTC3221 can be used to program the
desired output voltage.
The LTC3221 family is available in a low profile (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.
TYPICAL APPLICATIO
1µF
VIN
2.2µF
2
5
C
VIN
1
C+
VOUT
6
LTC3221-X
4,7 GND
VOUT
4.7µF
OFF ON 3 SHDN
3221 TA01
REGULATED 3.3V OUTPUT FROM 1.8V TO 4.4V INPUT
VOUT = 3.3V ±4%
IOUT = OmA TO 25mA; VIN >1.8V
IOUT = OmA TO 60mA; VIN >2V
REGULATED 5V OUTPUT FROM 2.7V TO 5.5V INPUT
VOUT = 5V ±4%
IOUT = OmA TO 25mA; VIN >2.7V
IOUT = OmA TO 60mA; VIN >3V
No-Load Input Current
vs Supply Voltage
16
14
12
10 TA = 90°C
TA = 25°C
8
6 TA = –45°C
4
2
0
1.5 2.0 2.5 3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
3221 TA01b
3221f
1

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LTC3221/
LTC3221-3.3/LTC3221-5
ABSOLUTE AXI U RATI GS
(Note 1)
VIN, SHDN, 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
www.DataSheet4U.com
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
C+ 1
6 VOUT
C2 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
*SHDN 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), SHDN = 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
8 15
V
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
8 15
V
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
1.181 1.23 1.279
10 20
5 12
–100
100
V
V
Ω
µA
nA
3221f
2

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LTC3221/
LTC3221-3.3/LTC3221-5
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), SHDN = VIN,
CFLY = 1µF, CIN = 2.2µF, COUT = 2.2µF, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
LTC3221-3.3/LTC3221-5
ISHDN
Shutdown Supply Current
VIH SHDN Input Threshold (High)
VIL SHDN Input Threshold (Low)
IIH SHDN Input Current (High)
IIL SHDN Input Current (Low)
LTC3221/LTC3221-3.3/LTC3221-5
VOUT = 0V, SHDN = 0V
SHDN = VIN
SHDN = 0V
1.3
–1
–1
1 µA
V
0.4 V
1 µA
1 µA
w w w f.OSCD a t a S Swhitcheing Fereqtuen4cy U . c o mVOUT = 2.5V
VUVLO
UVLO Threshold
600 kHz
1V
Note 1: Absolute Maximum Ratings are those values beyond which the life operating temperature range are assured by design, characterization and
of a device may be impaired.
correlation with statisitical process controls.
Note 2: The LTC3221EDC-X is guaranteed to meet performance
specifications from 0°C to 70°C. Specificaiton over the –40°C to 85°C
Note 3: Guaranteed by design, not subject to test.
Note 4: ROL = (2VIN – VOUT)/IOUT.
TYPICAL PERFOR A CE CHARACTERISTICS
Oscillator Frequency vs
Supply Voltage
800
750
700
650
600
550
500
450
400
1.5
2.0 2.5 3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
3221 G01
SHDN LO-to-HI Threshold vs
Temperature
0.9
0.8
VIN = 3.2V
0.7
VIN = 2.5V
0.6
VIN = 1.8V
0.5
Oscillator Frequency vs
Temperature
800
750
700
650 VIN = 4.5V
600
VIN = 2.5V
550
VIN = 1.8V
500
450
400
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3221 G02
SHDN HI-to-LO Threshold vs
Temperature
0.9
VIN = 3.2V
0.8
0.7 VIN = 2.5V
0.6 VIN = 1.8V
0.5
SHDN Threshold Voltage vs
Supply Voltage
0.9
0.8 LOW-TO-HIGH THRESHOLD
0.7
HIGH-TO-LOW THRESHOLD
0.6
0.5
0.4
1.5
2.0 2.5 3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
3221 G03
Short-Circuit Current vs
Supply Voltage
150
TA = –45°C
130
110 TA = 90°C
TA = 25°C
90
70
0.4
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3221 G04
0.4
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3221 G05
50
1.5
2.0 2.5 3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
3221 G06
3221f
3

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LTC3221/
LTC3221-3.3/LTC3221-5
TYPICAL PERFOR A CE CHARACTERISTICS (LTC3221-3.3 only)
Load Regulation
3.36
3.34
3.32 VIN = 3.2V
3.30
3.28
3.26
www.DataSheet34.2U4.com
VIN = 1.8V
3.22
VIN = 2.5V
3.20
3.18
3.16
0
20 40 60 80 100 120
LOAD CURRENT (mA)
3221 G07
No-Load Input Current vs
Supply Voltage
16
14
12
10 TA = 90°C
8 TA = 25°C
6 TA = –45°C
4
2
0
1.5 2.0 2.5 3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
3221 G10
Output Load Capability at 4%
Below Regulation
120 VOUT = 3.168V
110
TA = –45°C
100
90
TA = 90°C
80 TA = 25°C
70
60
50
40
1.5
2.0 2.5 3.0
SUPPLY VOLTAGE (V)
3.5
3221 G08
Extra Input Current vs Load
Current (IIN-2 ILOAD)
10 VIN = 2.5V
1
0.1
0.01
0.001
0.01
0.1 1 10
LOAD CURRENT (mA)
100
3221 G11
Effective Open-Loop Output
Resistance vs Temperature
15 VIN = 1.8V
14 VOUT = 3V
13
12
11
10
9
8
7
6
5
–50 –25
0
25 50 75 100
TEMPERATURE (°C)
3221 G09
Efficiency vs Supply Voltage
100
90
THEORETICAL MAX
80
70
60
IOUT = 30mA
IOUT = 1mA
50
40
30
20
10
0
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
SUPPLY VOLTAGE (V)
3221 G12
Output Ripple vs Load Current
70
Output Ripple
60
COUT = 2.2µF
50
40
VOUT
20mV/DIV
(AC-COUPLED)
30 COUT = 4.7µF
20
10
0
0 20 40 60 80 100
LOAD CURRENT (mA)
3221 G13
1µs/DIV
VIN = 2V
ILOAD = 60mA
COUT = 4.7µF, 6.3V, SIZE 0603
4
Load Transient Response
VOUT
20mV/DIV
(AC-COUPLED)
60mA
IOUT
0mA
3221 G14
5µs/DIV
VIN = 2V
ILOAD = 0mA TO 60mA STEP
COUT = 4.7µF, 6.3V, SIZE 0603
3221 G15
3221f

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LTC3221/
LTC3221-3.3/LTC3221-5
TYPICAL PERFOR A CE CHARACTERISTICS (LTC3221-5 only)
Load Regulation
5.10
5.05
5.00
4.95
www.DataSheet4U.com
4.90
VIN = 4.2V
VIN = 3.6V
VIN = 2.7V
4.85
4.80
0
20 40 60 80 100 120
LOAD CURRENT (mA)
3221 G16
No-Load Input Current vs
Supply Voltage
16
14
12
10 TA = 90°C
8
6
4 TA = 25°C
TA = –45°C
2
0
2.7 3.0 3.3 3.6 3.9 4.2 4.5
SUPPLY VOLTAGE (V)
3221 G19
Output Load Capability at 4%
Below Regulation
120 VOUT = 4.8V
110
TA = –45°C
100
90 TA = 90°C
80 TA = 25°C
70
60
50
40
2.7
3.0 3.3 3.6 3.9 4.2
SUPPLY VOLTAGE (V)
3221 G17
Extra Input Current vs Load
Current (IIN-2 ILOAD)
10 VIN = 3V
1
0.1
0.01
0.001
0.01
0.1 1 10
LOAD CURRENT (mA)
100
3221 G20
Effective Open-Loop Output
Resistance vs Temperature
15 VIN = 2.7V
14 VOUT = 4.5V
13
12
11
10
9
8
7
6
5
–50 –25
0
25 50 75 100
TEMPERATURE (°C)
3221 G18
Efficiency vs Supply Voltage
100
90
80
THEORETICAL MAX
70
60 IOUT = 1mA IOUT = 30mA
50
40
30
20
10
0
2.7
3.0 3.3 3.6 3.9
SUPPLY VOLTAGE (V)
4.2 4.5
3221 G21
Output Ripple vs Load Current
90 VIN = 3V
80
Output Ripple
70 COUT = 2.2µF
60
50
VOUT
50mV/DIV
(AC-COUPLED)
40
COUT = 4.7µF
30
20
10
0
0 20 40 60 80 100
LOAD CURRENT (mA)
1µs/DIV
VIN = 3V
ILOAD = 60mA
COUT = 4.7µF, 6.3V, SIZE 0603
3221 G13
Load Transient Response
VOUT
50mV/DIV
(AC-COUPLED)
60mA
IOUT
0mA
3221 G23
5µs/DIV
VIN = 3V
ILOAD = 0mA TO 60mA STEP
COUT = 4.7µF, 6.3V, SIZE 0603
3221 G24
3221f
5