LP2975IMMX-5.0 ,MOSFET LDO Driver/ControllerFeaturesn Simple to use, few external componentsA high-current LDO regulator is simple to design wi ..
LP2975IMMX-5.0 ,MOSFET LDO Driver/ControllerApplications57 mV detection threshold of the current sense circuitry mini-n High-current 5V to 3.3V ..
LP2978AIM5-3.8 ,Micropower SOT, 50 mA Low-Noise Ultra Low-Dropout RegulatorFeaturesn Ultra low dropout voltageThe LP2978 is a 50 mA, fixed-output voltage regulator de-signed ..
LP2978AIM5X-3.8 ,Micropower SOT, 50 mA Low-Noise Ultra Low-Dropout Regulatorapplications.n Requires minimum external components™Using an optimized VIP (Vertically Integrated P ..
LP2978IM5-3.8 ,Micropower SOT, 50 mA Low-Noise Ultra Low-Dropout RegulatorBlock DiagramDS100935-1VIP™ is a trademark of National Semiconductor Corporation. 2000 National Sem ..
LP2978IM5X-3.8 ,Micropower SOT, 50 mA Low-Noise Ultra Low-Dropout RegulatorElectrical CharacteristicsLimits in standard typeface are for T = 25˚C. and limits in boldface type ..
LSG F971 ,Multi ChipLEDApplications● hand phone back lighting● coupling in any light pipe● LCD back lighting● switch back ..
LSG T670 , Multi TOPLED
LSG T770 , Multi TOPLEDRG
LSGF971 ,Multi ChipLEDFeatures ● colors: super-red (628 nm) and green (572 nm)● color mixing is possible● each chi ..
LSGT670 , Multi TOPLED
LSGT670-J+L , Multi TOPLED
LP2975AIMM-12-LP2975AIMM-3.3-LP2975AIMM-5.0-LP2975AIMMX-12-LP2975AIMMX-3.3-LP2975AIMMX-5.0-LP2975IMM-12-LP2975IMM-3.3-LP2975IMM-5.0-LP2975IMMX-12-LP2975IMMX-3.3-LP2975IMMX-5.0
MOSFET LDO Driver/Controller
LP2975
MOSFET LDO Driver/Controller
General Description high-current LDO regulatoris simpleto design with the
LP2975 LDO Controller. Using an external P-FET, the
LP2975 will deliveran ultra low dropout regulator with ex-
tremely low quiescent current.
High open loop gain assures excellent regulation and ripple
rejection performance.
The trimmed internal bandgap reference provides precise
output voltage over the entire operating temperature range.
Dropout voltageis “user selectable”by sizing the external
FET: the minimum input-output voltage requiredfor opera-
tionisthe maximum load current multipliedby the RDS(ON)the FET.
Overcurrent protectionof the external FETis easily imple-
mentedby placinga sense resistorin series with VIN. The mV detection thresholdofthe current sense circuitry mini-
mizes dropout voltage and power dissipationin the resistor.
The standard product versions available provide output volt-
agesof 12V, 5V,or 3.3V with guaranteed 25˚C accuracyof
1.5% (“A” grade) and 2.5% (standard grade).
Features Simpleto use, few external components Ultra-small mini SO-8 package 1.5%(A grade) precision output voltage Low-power shutdown input<1μAin shutdown Low operating current (180μA typical@ VIN= 5V) Wide supply voltage range (1.8Vto 24V) Built-in current limit amplifier Overtemperature protection 12V,5V, and 3.3V standard output voltages Canbe programmed using external divider −40˚Cto +125˚C junction temperature range
Applications High-current5Vto 3.3V regulator Post regulatorfor switching converter Current-limited switch
Block Diagram Connection DiagramDS100034-1
*RSET valuesare: 208kfor12V part, 72.8kfor5V part,and 39.9kfor 3.3V
part.
Surface Mount Mini SO-8 PackageDS100034-2
Top View
For Order Numbers
See Table1
of this Document
See NS Package Number MUA08AJuly 2000
LP2975
MOSFET
LDO
Driver/Controller
