PM8903 3 A step-down monolithic switching regulator

The PM8903 is a high efficiency monolithic step-down switching regulator designed to deliver up to 3 A continuous current. The IC operates from 2.8 V to 6 V input voltage (VIN).

The PM8903 features low-resistance integrated nMOS and proprietary pulse-skipping mode for optimum efficiency over all the loading range.

The voltage mode control loop allows the widest range of output filter. Current sense is internally thermally compensated for optimum precision.

The integrated 0.6 V reference allows the regulation of output voltages with ±1% accuracy over temperature variations. Switching frequency is typically set to 1.1 MHz and can be programmed to 0.8 MHz or 1.0 MHz. Out of phase synchronization allows the reduction of input RMS current.

The PM8903 provides precise dual-threshold overcurrent protection as well as over / undervoltage and overtemperature protection. PGOOD output easily provides real-time information on the output voltage.

The PM8903 is available in VFQFPN16 3 x 3 mm

技术特性

Integrated 35 mΩ MOSFETs for high efficiency
3 A continuous output current
2.8 V to 6 V input voltage (VIN)
2.9 V to 5.5 V supply voltage (VCC)
Adjustable output voltage down to 0.6 V
1% output voltage accuracy
1.1 MHz switching frequency operation
PSKIP mode to optimize light load efficiency
Embedded bootstrap diode
Thermally compensated loss-less current sense across HS and LS MOSFETs
OV/UV/OC and overtemperature protection
Internal soft-start and soft-stop
Interleaving synchronization (Up to 2 ICs)
Power Good output
Shutdown function (<15 μA quiescent current)
VFQFPN16 3 x 3 mm compact package

应用原理图

PM8903 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
PM8903TR	Target		1000	VFQFPN 16 3x3x1.0	Tape And Reel		PM8903TR
PM8903	Target		1000	VFQFPN 16 3x3x1.0	Tube		PM8903

DATASHEET

描述	版本	大小
PM8903 : DS8864: 3 A step-down monolithic switching regulator	1	2127KB

APPLICATION NOTES

描述	版本	大小
AN4086: Buck voltage regulator using the PM8903	1	1425KB