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参数资料
| 型号： | LTC3221EDC-5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP DBL 5V 6DFN |
| 标准包装： | 2,500 |
| 类型： | 切换式电容器（充电泵），倍增器 |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 600kHz |
| 电流 - 输出： | 60mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 6-DFN-EP（2x2） |
LTC3221/
LTC3221-3.3/LTC3221-5
Micropower,
Regulated Charge Pump
in 2 × 2 DFN
FEATURES
DESCRIPTIO
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Ultralow Power: 8μA Quiescent Current
Regulated Output Voltages: 3.3V ±4%, 5V ±4%, ADJ
V IN Range:
1.8V to 4.4V (LTC3221-3.3)
2.7V to 5.5V (LTC3221-5)
Output Current: Up to 60mA
No Inductors Needed
Very Low Shutdown Current: <1μA
Shutdown Disconnects Load from V IN
Burst Mode Control
Short-Circuit Protected
Solution Pro?le < 1mm
Tiny 2mm × 2mm 6-Pin DFN Package
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 ?ying capacitor and two small bypass
capacitors at V IN and V OUT ) make them ideally suited for
small, battery-powered applications.
The LTC3221 family includes ?xed 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 V OUT to GND. The FB pin
of the adjustable LTC3221 can be used to program the
APPLICATIO S
desired output voltage.
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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
The LTC3221 family is available in a low pro?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.
TYPICAL APPLICATIO
No-Load Input Current
1 μ F
16
vs Supply Voltage
V IN
5
2
C –
V IN
1
C +
V OUT
6
V OUT
14
12
2.2 μ F
OFF ON
4,7
3
LTC3221-X
GND
SHDN
3221 TA01
4.7 μ F
10
8
6
T A = 90 ° C
T A = 25 ° C
T A = –45 ° C
REGULATED 3.3V OUTPUT FROM 1.8V TO 4.4V INPUT
V OUT = 3.3V ± 4%
I OUT = OmA TO 25mA; V IN >1.8V
I OUT = OmA TO 60mA; V IN >2V
4
2
REGULATED 5V OUTPUT FROM 2.7V TO 5.5V INPUT
V OUT = 5V ± 4%
I OUT = OmA TO 25mA; V IN >2.7V
I OUT = OmA TO 60mA; V IN >3V
0
1.5
2.0
2.5 3.0 3.5
SUPPLY VOLTAGE (V)
4.0
4.5
3221 TA01b
3221f
1
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