LPR30 ,LOW DROP VOLTAGE REGULATOR DRIVE FOR EXTERNAL N-CHANNEL POWER MOSFETBLOCK DIAGRAM1/10May 2000LPR30external Power MOSFET multiplied by the output It has an internal hig ..
LPR30D ,LOW DROP VOLTAGE REGULATOR DRIVE FOR EXTERNAL N-CHANNEL POWER MOSFETBLOCK DIAGRAM1/10May 2000 LPR30external Power MOSFET multiplied by the output It has an internal hi ..
LPS3008-222MLC , Shielded Power Inductors – LPS3008
LPS3010-102MLC , Shielded Power Inductors - LPS3010
LPS3010-103MLC , Shielded Power Inductors - LPS3010
LPS3010-103MLC , Shielded Power Inductors - LPS3010
LT1141ACN ,Advanced Low Power 5V RS232 Drivers/Receivers with Small Capacitors
LT1158CSW , Half Bridge N-Channel Power MOSFET Driver
LT1158CSW , Half Bridge N-Channel Power MOSFET Driver
LT1158CSW#PBF ,Half Bridge N-Channel Power MOSFET Driver
LT1160CS ,Half-/Full-Bridge N-Channel Power MOSFET Drivers
LT1160CS ,Half-/Full-Bridge N-Channel Power MOSFET Drivers
LPR30
LOW DROP VOLTAGE REGULATOR DRIVE FOR EXTERNAL N-CHANNEL POWER MOSFET
LPR30LOW DROP VOLTAGE REGULATOR DRIVE
FOR EXTERNAL N-CHANNEL POWER MOSFET
May 2000 VERY LOW DROPOUT POWER MOSFET
DRIVER HIGH PRECISIONVref= 2.5V(± 2%) VERY LOW CURRENT DRAIN (TYP. 2mA) REFERENCE OUTPUT CURRENT UP TO
20mA OPERATING SUPPLY VOLTAGE FROM 5V 30V MAXIMUM INPUTVOLTAGEON-GATE PIN
(N.8) UP TO 60V INTERNAL CURRENT LIMIT OPERATIONAL
AMPLIFIER OFFSET TRIMMED AT
50mV ± 10mV NO CAPACITORIS NEEDED FOR STABILITY REFERENCE OUTPUT TEMPERATURERANGE0o CTO70oC
APPLICATION ULTRA HIGH CURRENT ULTRA LOW
DROPOUT VOLTAGEREGULATOR CONSTANT HIGH CURRENT SOURCE
BLOCK DIAGRAM
DIP-8 SO-8 LOW PARTS COUNT5V TO 3.3V
COMPUTER SUPPLY LOW NOISE/LOWDROP SMPS POST
REGULATOR
DESCRIPTIONThe LPR30isa very Low Dropout Regulator
Controllerina single IC solution for very high
current low dropout linear voltgage regulator.It
usesan external N-CHANNEL POWER MOSFET the linear pass element. The LPR30 featuresa
dropout voltage as low as the RDS(on) of the
1/10
external Power MOSFET multipliedby the output
current. Consequently the output current can be high as the POWER MOSFET can provide
(also usingan adeguate heatsink).
The VCCof the LPR30 range from 5Vto 30V. For
very low drop voltage operation,the LPR30
requiresan external gate drive supplyto provide
the control voltage neededto drive the gateof the
externalPOWER MOSFET.
The regulator outputis constant-current limited
when the controller detects 50mV across an
externalsense resistor. has an internal high precision(± 2%) Voltage
Referenceat 2.5V
The output regulated voltage is possible to
programto any voltage from 1Vto more than
50V.
Flexible designis achievedby the availabilityof
the Voltage Reference Output through an
external pin (N.4) thatis ableto supply more than
20mAas load current. The LPR30is availablein pin plastic DIP andin SO-8 for SMD.In both
package versionsitis ableto operate from0o CtooC.
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value UnitVCC DC Input Voltage 36 V
IoREF Reference Output Current Internally Limited
Ptot Power Dissipation 1 W
Top Operating Junction TemperatureRange 0to70 oC
Tstg Storage Temperature Range -40to 150 oC
Vgate Maximum Gate Voltage (pin n8) 60 V
Igate Maximum Gate Current (pinn8) 200 mA
Absolute Maximum Ratingsare those values beyond which damagetothe device may occur.
Functionaloperation under these conditionsisnot implied.
THERMALDATA
Symbol Parameter DIP-8 SO-8 UnitRthj-amb Thermal Resistance Junction-ambient(*) Max 130to 180 100to 150 o C/W
(*) This value depends from thermal design ofPCBon whichthe deviceis mounted.
CONNECTION DIAGRAM (top view)
ORDERING NUMBERS
Type DIP-8 SO-8 SO-8 (tape& reel)LPR30 LPR30N LPR30D LPR30D-TR
LPR302/10
ELECTRICAL CHARACTERISTICS(Referto the test circuits, VCC= 10V,Tj =25oC unless otherwise specified.
GENERAL
Symbol Parameter Test Conditions Min. Typ. Max. UnitVCC Operating Supply Voltage 5 30 V
ICC Supply Current IK=0 μAVCC =30V=0 to70oC
ERR(-), LIM(-)=1V
ERR(+), LIM(+)=0V mA
VOSAT OutputSaturation Voltage VCC=5V IO= 100 mA=0 to70oC
ERR(-), LIM(-)=1V
ERR(+), LIM(+)=0V
280 500 mV
IOLK OutputLeakage Current VCC=5V VO =60V
ERR(-), LIM(-)=0V
ERR(+), LIM(+)=1V
100 μA
REFERENCE BLOCK
Symbol Parameter Test Conditions Min. Typ. Max. UnitVREF Reference Output Voltage 2.45 2.5 2.55 V Reference Output Current 20 mA
ΔVREF/ΔIK Reference Output Voltage
Change=1 to20mA CREF=0pF 3 mV
SVR Supply Voltage Rejection VIN <10V ±1Vf= 120Hz CREF=0pF 70 dB OutputNoise B =10Hzto10 KHz =10 mA CREF=0pF μV
ERROR AMPLIFIER BLOCK
Symbol Parameter Test Conditions Min. Typ. Max. Unit Input Bias Current 0.3 1 μA
VOS Input OffsetVoltage VCC=5to30V Tj=0 to70o C5 mV
IOS Input OffsetCurrent 5 50 nA Open Loop Gain Tj=0 to70o C80 dB
VCM Input CommonMode Voltage
Range=0 to70o C1 VCC-1 V
CMR Common ModeRejection 70 dB
SVR Supply Voltage Rejection VIN=9 to11V f= 120Hz
VIN=9 to11V f= 10KHz
CURRENT LIMITING BLOCK
Symbol Parameter Test Conditions Min. Typ. Max. Unit Input Bias Current 0.5 μA
VOS Input OffsetVoltage Tj=0 to70o C40 60 V Open Loop Gain Tj=0 to70o C50 dB
VCM Input CommonMode Voltage
Range=0 to70o C0 VCC-3 V
LPR303/10
TEST CIRCUITReference Output Voltagevs Temperature Reference Output Voltagevs Load Current
TYPICAL PERFORMANCE CHARACTERISTICS
LPR304/10
Reference Output Voltagevs Load Current
Current Limit Input Offset Voltagevs Supply
Voltage
Reference Supply Voltage Rejectionvs Output
Current
Error Amplifier Output SaturationVoltagevs
Temperature
Current Limit Input Offset Voltagevs Supply
Voltage
Reference Output Noisevs Output Current
LPR305/10
APPLICATION INFORMATION
Figure1: LPR30 Typical Application
Figure2: Configuration For Faster Response
Figure3: Configuration For VIN= 3.3V, VOUT= 2.9V, IOUT =7A
(*) This capacitor improves noise performance;canbe omittedin most applications
LPR306/10
