LTC3221 Micropower, Regulated Charge Pump in 2 x 2 DFN

The LTC3221 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 fl ying capacitor and two small bypass capacitors at VIN and VOUT) make them ideally suited for 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® 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 profi le (0.75mm) 2mm × 2mm 6-pin DFN package

产品特点 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)
2.7V 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 Profi le < 1mm
Tiny 2mm × 2mm 6-Pin DFN Package

参数

应用

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

典型应用图

LTC3221 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC3221EDC	DFN	6	E	$2.29
LTC3221EDC#PBF	DFN	6	E	$2.29
LTC3221EDC#TR	DFN	6	E	$2.29	$1.60
LTC3221EDC#TRM	DFN	6	E	$2.34	$1.65
LTC3221EDC#TRMPBF	DFN	6	E	$2.34	$1.65
LTC3221EDC#TRPBF	DFN	6	E	$2.29	$1.60
LTC3221EDC-3.3	DFN	6	E	$2.29
LTC3221EDC-3.3#PBF	DFN	6	E	$2.29
LTC3221EDC-3.3#TR	DFN	6	E	$2.29	$1.60
LTC3221EDC-3.3#TRM	DFN	6	E	$2.34	$1.65
LTC3221EDC-3.3#TRMPBF	DFN	6	E	$2.34	$1.65
LTC3221EDC-3.3#TRPBF	DFN	6	E	$2.29	$1.60
LTC3221EDC-5	DFN	6	E	$2.29
LTC3221EDC-5#PBF	DFN	6	E	$2.29
LTC3221EDC-5#TR	DFN	6	E	$2.34	$1.60
LTC3221EDC-5#TRM	DFN	6	E	$2.34	$1.65
LTC3221EDC-5#TRMPBF	DFN	6	E	$2.34	$1.65
LTC3221EDC-5#TRPBF	DFN	6	E	$2.29	$1.60

LTC3221 数据手册及相关资料下载

数据手册(英文) : LTC3221/LTC3221-3.3/LTC3221-5 - Micropower, Regulated Charge Pump in 2 x 2 DFN.PDF
可靠性数据 : R415 Reliability Data .PDF