LTC1928-5 Doubler Charge Pump with Low Noise linear Regulator in SOT-23

The LTC®1928-5 is a doubler charge pump with an internal low noise, low dropout (LDO) linear regulator. The part is designed to provide a low noise boosted supply voltage for powering noise sensitive devices such as high frequency VCOs in wireless applications.

An internal charge pump converts a 2.7V to 4.4V input to a boosted output, while the internal LDO regulator converts the boosted voltage to a low noise regulated output. The regulator is capable of supplying up to 30mA of output current. Shutdown reduces the supply current to <8µA, removes the load from VIN by disabling the regulator and discharges VOUT to ground through a 200 Ohms switch.

The LTC1928-5 LDO regulator is stable with only 2µF on the output. Small ceramic capacitors can be used, reducing PC board area.

The LTC1928-5 is short-circuit and overtemperature protected. The part is available in a 6-pin low profile (1mm) ThinSOT package

产品特点 Features

Low Output Noise: 90µVRMS (100kHz BW)
Low Profile (1mm) ThinSOT™ Package
Fixed Output Voltage: 5V
Input Voltage Range: 2.7V to 4.4V
Uses Small Ceramic Capacitors
No Inductors Required
Output Current Up to 30mA
550kHz Switching Frequency
Low Operating Current: 190µA
Low Shutdown Current: 4µA
Internal Thermal Shutdown and Current Limiting

参数

应用

VCO Power Supplies for Cellular Phones
2-Way Pagers
Wireless PCMCIA Cards
Portable Medical Instruments
Low Power Data Acquisition
Remote Transmitters
White LED Driver
GaAs Switches

典型应用图

LTC1928-5 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) *
LTC1928ES6-5	SOT	6	E	$2.06
LTC1928ES6-5#PBF	SOT	6	E	$2.06
LTC1928ES6-5#TR	SOT	6	E	$2.06	$1.76
LTC1928ES6-5#TRM	SOT	6	E	$2.06	$1.78
LTC1928ES6-5#TRMPBF	SOT	6	E	$2.06	$1.78
LTC1928ES6-5#TRPBF	SOT	6	E	$2.06	$1.76

LTC1928-5 数据手册及相关资料下载

数据手册(英文) : LTC1928-5 - Doubler Charge Pump with Low Noise linear Regulator in SOT-23.PDF
可靠性数据 : R402 Reliability Data .PDF