CM2730 – 300ma DUAL LOW Noise CMOS LDO

Part Number : CM2730

Function : 300ma DUAL LOW Noise CMOS LDO

Manufactures : Champion Microelectronic Corporation

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CM2730 image

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Description :

CM2730 300mA DUAL LOW NOISE CMOS LDO GENERAL Description The CM2730 dual LDO family are positive linear voltage regulators developed utilizing CMOS technology. CM2730 contains two LDOs, one with pre-set output voltage (master LDO1), the other with adjustable output voltage (slave LDO2). Each LDO owns its input voltage, bandgap reference voltage, and protection circuit, which reduce noise and cross talk between two LDOs. This dual LDO family is featured low quiescent current (60µA typ.), low dropout voltage, and high output voltage accuracy. Built-in low on-resistance transistor provides low dropout voltage and large output current. 2.2µF or greater can be used as an output capacitors. The PTSSOP-8 package is recommended for configuring portable devices and large current application, respectively. These robust devices are designed to prevent device failure under the worst operation condition with both Thermal Shutdown and Current Fold-back. ! ! ! ! ! ! ! ! ! ! ! ! Features ! ! Very Low Shutdown Current < 2.0µA Very Low Dropout Voltage: 300mV @ 300mA Low Current Consumption: Typ. 60µA, Max. 70µA Output Voltage: master LDO1 fixed at 2.5V or 3.3V, and the slave LDO2 adjustable voltage Output Current Range: 0mA ~ 300mA per LDO PTSSOP-08 Package with Power Pad High Accuracy Output Voltage: +/- 1.5% Input Range of 2.6V to 7.0V Independent Thermal Shutdown Power Sequence Power Good Output Function Independent Bandgap Current Limiting Factory Pre-set Output Voltages Short Circuit Current Fold-Back Low Temperature Coefficient ! ! Applications ! ! ! ! Battery-powered devices Personal communication devices Home electric/electronic appliances PC peripherals 24 Hours Technical Support--WebSIM Champion provides customers an online circuit simulation tool called WebSIM. You could simply logon our website at for details. PIN CONFIGURATION PTSSOP-08 (PT-08) Front View 1 2 3 4 G ND VO UT1 VIN1 ENB VFB2 VO UT2 VIN2 PG B 8 7 6 5 2002/09/30 Preliminary Rev. 0.3 Champion Microelectronic Corporation Page 1 CM2730 300mA DUAL LOW NOISE CMOS LDO TYPICAL APPLICATION RX1 OUTPUT1 INPUT1 GND VOUT1 VIN1 ENB VFB2 VOUT2 VIN2 PGB VFB2 OUTPUT2 INPUT2 RX2 C1 C2 RX3 C4 C3 2.2uF 1.0uF 1.0uF 2.2uF BLOCK DIAGRAM VIN 1 VIN 2 VO U T2 VO U T 1 O vercurrent S hutdow n1 O vercurrent S hutdow n2 Therm al S hutdow n1 Sequence C ontrol1 EN B R1 Therm al S hutdow n2 R X1 AM P1 AM P2 + VF B1 + VFB2 Vref2 = 1.176V R X2 G ND 2002/09/30 Preliminary Rev. 0.3 Vref1 = 1.176V Pow er C ontrol PG B R2 G ND Champion Microelectronic Corporation Page 2 CM2730 300mA DUAL LOW NOISE CMOS LDO PIN Description Pin Number 1 2 3 4 5 6 7 8 Symbol GND VOUT1 VIN1 ENB PGB VIN2 VOUT2 VFB2 Description Master & slave LDO ground Master LDO1 output voltage Master LDO1 input voltage Master LDO1 enable Dual LDO power good signal Slave LDO2 input voltage Slave LDO2 output voltage Salve LDO2 fe [...]

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CM2730 Datasheet

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